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S
®
Training Manual
Projection Television
RA-3 & RA-4A Chassis
Models: KP-43T70 KP-53N74 KP-48V80 KP-46C70 KP-52S70 KP-53V80 KP-48S70 KP-61S70 KP-61V80 KP-48S72 KP-53XBR300 KP-61XBR300 Circuit Description and Troubleshooting Course: TVP-10
Sony Service Company A Division of Sony Electronics Inc ©1999 All Rights Reserved Printed in U.S.A.
S is a trademark of Sony Electronics
Circuit Description and Troubleshooting:
Models: KP-43T70
KP-53N74 KP-48V80 KP-46C70 KP-52S70 KP-53V80 KP-48S70 KP-61S70 KP-61V80 KP-48S72 KP-53XBR300 KP-61XBR300
Prepared by: National Training Department Sony Service Company A Division of Sony Electronics Inc. Course presented by _____________________________________ Date ___________________________________________________ Student Name ___________________________________________
S
SEL Service Company A Division of Sony Electronics Inc. 1 Sony Drive Park Ridge, New Jersey 07656
TVP100100
Printed in U.S.A.
Table of Contents
Introduction
RA-3 Features RA-3 and RA-2 Similarities RA-3 and RA-4 Similarities RA-3 New Circuitry
1
1 2 2 2
8-Bit A/D Converter
9
Picture and Picture (V Models)
Main Y Signals Main C Signal Main Decoder and YUV Switch Picture and Picture Controller
11
11 11 11 11
Power Supply Protection
Latch +135 Volt Over Voltage +135 Volt Over Current Protection Standby Unregulated OVP Standby +5 Volt OCP
3
3 3 3 3 3
Video Processing
YUV Controller YCJ
13
13 13
On Screen Displays
Micro OSD V Chip/CC OSD PJ OSD
15
15 15 15
V Model Video Path Block
Switching Main Processing P&P Processing OSD YCJ
5
5 5 5 5 5
CRT Drive (CG)
Tube Bias Ik Return
17
17 17
S Model Video Path Block
Switching Main Processing PIP Processing OSD YCJ
19
19 19 19 19 19
KP-53V80 Video Switching
KP-53V80 Video 4 and Video 5 Inputs Composite Video and Y Switching Color Switching
7
7 7 7
Comb Filter (V Models)
9
Switching and Comb Filter (S Models)
Video Inputs Switching and Comb Filter
21
21 21
Self-Diagnostics Standby Power Supply
Converter Operation Regulation Over Current Protection (OCP) Over Voltage Protection (OVP) Secondary Output Checking Q621
i iii
iii iii v v v v
Picture in Picture (S Model)
Sub Y Signal Sub C Signal Sub Decoder, PIP Processor and YUV Switch
23
23 23 23
RA-4 vs. RA-4A
RA-4A Features "1080I Capable" RA-4 and RA-4A Circuit Differences
25
25 26 26
Switching Power Supply
Primary Rectifier Oscillator Regulation Soft Start Limit Troubleshooting
vii
vii vii vii ix ix xi
Video Path Block
Inputs Main Video Sub-Video Video Processor
27
27 27 27 27
Horizontal Deflection
Horizontal Scanning High Voltage Development
xv
xv xvii
DTV Video Processing Block
Component Input Selected RGB Inputs Selected
29
29 29
Vertical Deflection
Vertical Drive Protection
xxi
xxi xxi
DTV Video Processing
Circuit Description
31
31
VD Mute
RGB Mute
33
33
Convergence Block
Convergence Auto Focus (Auto Registration)
xxiii
xxiii xxiii
Appendix 1
Sensor Amp
Auto Focus Circuit Description
xxv
xxv xxix
BD Input
Digital Convergence
xxxi
xxxi
BD Output
IC1701 Regi Correction
xxxiii
xxxiii
Convergence Out
Regi Mute Convergence Amp
xxxv
xxxv xxxv
Appendix 2 - Service Bulletins
1
Introduction
Overview
The purpose of this manual is to discuss the circuitry in the 1999-2000 Sony projection television chassis. These chassis are the RA-3 and RA4A. Both of these chassis share circuitry with the RA-2 and/or RA-4 chassis. There are previous training manuals that cover circuits in these models. The TVP-07 manual covers the RA-2 chassis and the TVP-08 manual covered the RA-4 chassis. We will include excerpts from these training manuals in the Appendix at the rear of this manual. Please take note that some of the component designations may be different between the older and newer chassis.
Flash Focus One button system that aligns the horizontal and vertical centering of the red, green and blue tubes. This system differs from previous Sony one touch systems in that it does not align the skew of the colors only the centering. Advanced Picture Stabilizer - Maintains constant picture quality by responding more quickly during scene changes, especially sudden dark-tobright transitions, thereby reducing zooming effect, minimizing picture distortion and correcting blooming (poor focus). Free Layout PIP Allows the PIP picture to be moved anywhere on the screen instead of to just the designated corners. Beside screen size, the table below shows the differences between the N, S, T and V models: C,N and S T V
Comb Filter 3 Line No 3 Line Yes 3D Yes High Contrast Screen Audio Power Output Surround Sound PIP Center Speaker Input Component Video Inputs
RA-3 Features
The following models use the RA-3 chassis:
KP-43T70 KP-46C70 KP-48S70 KP-48S72 KP-53N74 KP-53S70 KP-61S70 KP-48V80 KP-53V80 KP-61V80
15Wx2 Matrix Regular No
15Wx2 Matrix Regular No
20Wx2 Tru-Surround Twin View Yes
Important Note: The book will make reference to two distinct types of RA-3 chassis, S and V. Since the T, C and N models are similar to the S models, we will be referring to all of these models when the term S models is used unless otherwise noted. This is because the C and N models have marketing differences and are only sold by certain dealers. The T model is distinctive because it uses the tabletop design instead of the standard slim line design. All RA-3 chassis models contain the following features:
Flash Focus System Advanced Picture Stabilizer 2 Tuner PIP Free Layout PIP Steady Sound Auto Volume Shading Compensation Velocity Modulation Scanning Dynamic Focus Circuitry
1
1
2
3 Line Digital Comb Filter To improve color performance, uses digital memory to evaluate three adjacent horizontal scanning lines at a time. 3D Digital Comb Filter Uses digital memory to compare each horizontal line with the line above and below it and also with the corresponding lines in adjacent frames.
Matrix Surround Sound Adds ambience to stereo programs for home theater like sound. Tru-Surround Virtual Dolby Surround Generates lifelike sound from the rear speakers using only the stereo pair built into the cabinet. This system uses Dolby Pro Logic to provide a very convincing effect. Twin View Sony's picture and picture feature, which allows two pictures to be displayed side by side. This Twin View system is functionally the same as the XBR system, but does not display the two pictures in 480P resolution.
RA-3 and RA-2 Similarities
The following are similarities between the RA-2 and RA-3 chassis. The Appendix at the rear of the book contains excerpts from TVP-07 that describe the operations of these circuits. Keep in mind that component designation and location will be different. Basic board layout is the same except the Z boards have been removed. The yokes have connectors that connect to the CG board. Switching Power Supply Vertical Deflection Circuit is the same, but is now located on the G board instead of the A board. The Horizontal, High Voltage and Pin Amplifier System Control is similar, but there are some additional lines to deal with new features such as component video inputs and digital registration. Reset, key scan and EEPROM reading and writing remain the same.
that allows 81 different points to be adjusted for each color. The system differs slightly from the RA-4 chassis because of the addition of a control for green vertical skew. The Flash Focus system has been added to the RA-3 chassis. This system is similar to the Auto Focus system found in the RA-4 chassis except the RA-3 system only performs auto centering while the RA-4 system performed auto centering and skew. The difference lies in the use of the sensors. The RA-4 system used eight sensors and the RA3 system only uses four. This is why the auto skew adjustment is not possible. Convergence Amplifier Self-Diagnostics similar to the RA-4 chassis is used. The difference is that the failure signal from each circuit is input to the System Control IC since the RA-3 chassis does not have an OSD Processor.
RA3 New Circuitry
The following are new circuits that will be covered in this book: Power supply Protection Video Signal Path The different video paths for S and V models will be discussed. The switching, comb filter and PIP circuits are different between S and V models. The OSD and video processing (YCJ) are the same between various models. CRT drive will be described using the CG board. A discrete amplifier is used instead of the video amplifier IC used in previous models. The Standby Supply is similar to the one in the AA2W direct view chassis. There is an excerpt from CTV-26 describing the circuit operation of this circuit.
RA-3 and RA-4 Similarities
The following are similarities between the RA-2 and RA-4 chassis. The Appendix at the rear of the book contains excerpts from TVP-08 that describe the operations of these circuits. Keep in mind that component designation and location will be different. The digital registration and auto focus circuits located on the BD board in the RA-4 chassis are used. They are mounted to the A board in the RA-3 chassis. The RA-3 chassis uses the same digital registration system used in the RA-4 chassis. Digital registration allows the servicer to adjust the set using course and fine modes. The fine mode uses a point system
2
3
Power Supply Protection
Overview
The RA-3 chassis employs over voltage and over current protection for the +135 volt line. The standby +5 volt line is protected against over voltage and over current. There is also an 11V LVP/18V OVP protection circuit
Standby Unregulated OVP
Current from T602/9 is rectified by D667 to produce a positive supply at D667/K. This supply voltage is applied to IC655/I and D675/K. D675 is a 10-volt zener diode. When the voltage present at the input of IC655 reaches around 11.2 volts, D675 will begin to conduct. When this occurs, Q655 will turn ON which activates the latch.
Standby +5 Volt OCP
Current from T602/9 is rectified by D651 to produce a negative voltage at D651/A. This voltage is connected to the Standby +5 volt line through a voltage divider that includes R686, D664, R688, Q658/B-E and R689. As more current is drawn by the circuits on the Standby +5 volt line, the voltage at D651 becomes more negative. When this voltage is low enough, Q658 will turn ON and activate the latch. D676 is used to enable the soft start circuit during power up or when there is a sudden rise in Standby 5 volts.
Latch
Shut down occurs whenever a condition in one of the protect circuits causes the Q655 to turn ON. When Q655 turns ON, Q654 also turns ON. This drops the drive voltage to Relay Drive Q652/B, turning it OFF. When Q652 turns OFF, the ground return path for the power relay opens and the unit shuts OFF.
+135 Volt Over Voltage
The +135 volt line is input to the protection circuit through D672 and then to a voltage divider consisting of R661 and R660. The voltage developed across R660 is applied to IC651/5 Non-inverting input. IC651/6 Inverting input has 2.5 volts applied to it from the voltage divider consisting of R663 and R662. This voltage is divided down by the Standby +5 volt line. If the voltage at IC651/5 rises above the 2.5-volt reference, then the output at IC651/7 will go HIGH. This High output is then applied to the latch circuit and to the Self-Diagnostic section on the A board. When this occurs, the Timer LED will flash three times.
11V Low Voltage Protection and 18V Over Voltage Protection
Q657, D669 and associated components make up the 11V LVP and 18V OVP. Normally, D669, a 13V zener, is biased below its zener point and is OFF. A severe drop or loss of the 11V line will cause the zener to break over and conduct, causing Q657 to turn ON and activating the protection latch circuit. In addition, any rise in the 18V line that causes D669 to conduct will also turn ON Q657 and, in turn, the latch circuit.
R684 D669 C678 MTZJ13 +11V R685 RELAY DRIVE FROM Q652/C R682 R683 G BOARD Q657 +18V D688 MTZJ-24A TO Q655/B LATCH
+135 Volt Over Current Protection
The over current protection circuit works by monitoring the voltage divider network that consists of R659, R657 and R654. R654 is connected between the negative side of the +135 volt bridge rectifier and ground. Any rise in current in the +135 volt supply will cause the voltage across R654 to become more negative. This changes the voltage that is input to IC651/ 2 Inverting input. IC651/3 Non-inverting input is connected to ground. If the voltage at IC651/2 becomes negative, a HIGH will be output at IC651/ 1. This HIGH output is applied to the latch circuit and also to IC002 System Control on the A board for the Self Diagnostic feature. If this occurs, the Timer LED will flash twice.
11V LVP/18V OVP
STANDBY 5V R663 R659 D672 +135V R661 R660 6 5 + 8 IC651 OVP/OCP uPC393C 7 R665 R664 G BOARD CN605 OVP 8 TO CN681 A BOARD 1 3 R657 +135V BRIDGE NEG. FROM D652/A AND D653/A D667 9 PART OF T602 STB C676 8 D651 R686 C680 RY DRIVE FROM Q652/C D676 MTZJ-3-9B R681 TO RY601 POWER RELAY D664 R688 MTZJ-2-7A Q658 D674 I IC655 BAO5T O 5V REG. G C679 R687 D680 R667 R662 4 D661 C663 D663 Q654 R675 + RELAY OCP
2 C662
-
7 4
TO Q652/B RELAY DRIVE
D675 MTZJ10B
R654 R691
PROTECTION LATCH Q655 STANDBY 5V
R689 R690 FROM11V LVP/18V OVP TO Q656/B LIMITER
POWER SUPPLY PROTECTION 4
11TVP10 1214 1/13/00
5
V Model Video Path Block
Overview
The video path in the V model RA-3 chassis is different from that of the RA-2 chassis because of the addition of two component video inputs.
P&P Processing
The P&P processing circuit uses inputs from both the main picture path and the sub picture path because of the Twin View functions. The main video path can be from two sources. They are Main Y and C (if composite/S video is used) and component video. If composite/S video input is selected for main picture input to P&P, the Main Decoder first decodes it to YUV. These signals will be selected by the YUV Switch and input to the P&P Controller. If component video input is chosen, the Y signal is applied to the YUV switch along with the UV signals from the UV Switch. These signals will then be selected by the YUV Switch and input to the P&P Controller. The Sub video path also comes from two sources. The sub video path contains a decoding and switching network similar to the one found in the main picture path. This decoding and switching network will switch the YUV from the selected source to the P&P Controller. The P&P Controller outputs compressed YUV signals for its functions. It also outputs a YUV Switch signal (not shown) that will determine the window size and position. These signals are sent to the YUV Controller, which will select either the P&P signal or the component input signal for output to the YCJ.
Switching
There are three types of inputs in the back of the set. They are composite, S video and component video. The composite signal is input to the switching circuit and switched to the comb filter. After Y and C separation the Comb C signal is sent back to the switching circuit. Since a composite signal was input, this Comb C signal will be switched out and become Main C. The Y signal out of the comb filter is input to a switch and, when selected, becomes Main Y. If an S video input is used, the Y signal will follow the same path as the composite video but will go around the comb filter. It would be selected at the Y switch for output instead of the Y from the comb filter. The C signal would be switched directly from the S video input to the Main C path. If a component input is chosen, the Y input would follow the same path as the S video Y signal. A separate circuit that outputs these signals directly to the YUV Switch switches the U and V signals. The switching circuit also delivers any of the inputs to the Sub Video path. This means that SY, SC and SYUV signals are delivered to the sub video path.
OSD
On-Screen Displays are generated by three different sources in the RA-3 chassis. They are System Control, V Chip/CC and PJ OSD and they share a common input to the YCJ. These circuits have a mute control system that keeps them from interfering with each other.
Main Processing
Two separate sources are used for the main video path. They are Main Y and C (if composite/S video) and component video. Main Y or C is applied directly to the YCJ. These inputs will be used if a composite/S video source is selected. If a component video input is chosen then the Main YUV signals are chosen by the YUV controller and input the YCJ. Keep in mind that this line will also carry the P&P picture.
YCJ
The YCJ takes the inputs from the Main Y and C paths, the component or P&P from YUV Controller and the OSD RGB inputs. It processes these signals and converts them all to RGB drive signals that are output to the three tubes.
CV INPUTS C Y SWITCHING
Y/ CV C
3D COMB FILTER
MY Y SW MAIN C
MY MAIN DECODER
PJED Y VCHIP YUV MAIN YUV SYSCON YUV
COMPONENT Y UV4 UV5
UV Y YUV SW
UV SWITCH SY SUB YUV SUB DECODER YUV SY SUV YCJ Y SW YUV Y YUV CONTROLLER UV COMPONENT YUV OR PIP YUV C Y OSD RGB
U BOARD
SC
P&P
R G B TO TUBES
V MODELS VIDEO BLOCK 6
18TVP10 1/18/00
7
KP-53V80 Video Switching
Overview
In this section we will look at the input-switching path for the KP-53V80. This includes switching of composite, S video and component video inputs.
Composite Video and Y Switching
Composite video can be input to IC1702 A/V Switch from either THE tuner or video 1,2 or 3 inputs. The selected composite video input is output at IC1702/53. This signal then passes through Q1727 Buffer to J1706 Monitor Out and back into IC1702 at pin 49. When one of the composite video inputs is chosen, it will be switched to IC1702/56. The composite video signal is then sent to Q1724 buffer and finally to CN1701/18 which connects to CN401 on the A board. When one of the S video or component video inputs is selected, the Y signal from the selected input is switched to IC1702/56. In this case, a Y signal will be output from Q1724 Buffer to CN1701/18.
KP-53V80 Video 4 and Video 5 Inputs
The Video 4 and Video 5 inputs accept component video only. The Y inputs from Video 4 and 5 are routed to IC1702 A/V Switch. The U and V inputs are sent to IC1703 and IC1704. These ICs switch the U and V to either the Main or Sub UV paths. You should note here that the Pb input is called U in the rest of circuitry and that the Pr input is called V.
Color Switching
Composite video signals are processed by the Comb Filter on the A board. The Comb Filter separates the Y and C components of the composite video signal. The C output from the comb filter is coupled through CN1703/ 5 to IC1702/51. When a composite input is selected, the Comb C signal will be switched to IC1702/58. The output from IC1702/58 is passed through Q1723 Buffer to CN1701 and the A board. When an S video input is selected, the selected signal is output at IC1702/58. The C signal passes through Q1723 Buffer to CN1701/16. If Video 4 or Video 5 is selected the Pb and Pr inputs are routed to IC1703 and IC1704. The Y component input is switched using IC1702 A/V Switch. The Pb and Pr inputs go to four switches contained in IC1703 and IC1704. The logic level at CN2001/20 SUV SW and CN1701 MUV SW controls these switches. These two lines control which signal is sent to the main or sub UV circuits.
15 Y4 14 L4 16 R4 VIDEO 4 IN Y PB 21 Y5 PR L AUDIO R VIDEO 5 IN J1704 Y PB PR L AUDIO R U BOARD TO IC1703 + IC1704 YUV SWITCH 20 L5 22 R5 J1703 IC1702 A/V SWITCH CXA 1845
KP53V80 VIDEO 4 AND 5 INPUTS
VOUT1 TV V IN V1 V2 V3 SUB TUN V6 S VIDEO Y1 Y2 Y3 Y4 Y5 C1 C2 C3 SDA SCL PB PR
63 1 25 7 60 3 27 9 15 21 5 29 11 58 51 49 56 53
BUFFER
MONITOR OUT J1706
Q1724 BUFFER
CN1701 MAIN COMP V/Y
18
COMPONENT INPUTS S VIDEO IC1704 YUV SWITCH NJM 2283M
TO CN401 A BOARD Q1723 BUFFER MAIN C COMB C SUB Y SUB C Q1725,1728 BUFFER Q1726,1729 BUFFER Q1731,1734 BUFFER SUB U
16 5 10 9
32
IC1702 45 A/V SWITCH 47 31 CXA1845
TO CN201 A BOARD
VIDEO 4
11 14 16 5 12 3 2 8 6 7
CN1703 CN2001
18
SUB V
17 20 3
TO CN004 A BOARD SUV SW
PB VIDEO 5 PR
1
9
MAIN U MAIN V
1
U BOARD
IC1703 YUV SWITCH NJM 2533M
1 3 7 2
TO CN401 A BOARD
Q1732,1735 BUFFER
MUV SW
5
CN1701
3TVP10 1204 3/23/00
KP53V80 VIDEO SWITCHING 8
9
Comb Filter (V Models)
Overview
The digital 3D Comb Filter is used to separate the Y and C signals contained in the composite video signal. IC203 D/A Converter, IC204 3D Comb Filter and IC202 4MB EDO Memory are used to accomplish this.
IC202 Frame Memory is four Meg of EDO memory. Since IC202 Frame Memory is EDO type memory, it needs to be refreshed constantly. This is done using the RAS (Row Address Strobe) and CAS (Column Address Strobe) lines. IC204/10 MCAS outputs a CAS signal to IC202/28 and 29 UCAS and LCAS. IC204/98 MRAS is output to IC202/14 RAS. These lines are always active and keep the memory constantly refreshed. The comb filter uses the memory controller for three different purposes. The first is to feed signals that are delayed by 1H and 2H into the line (2D) comb filter. The second is to feed signals that are delayed by 1H and 526 H into the frame (3D) comb filter. The third section is the motion detector block that looks at all of the signals and determines if there is motion. This circuit is connected to a mixer that outputs either the output from the line comb filter if there is motion, or the output from the frame comb filter if no motion is detected. After the filtering is complete, the separate Y and C components are input to noise reduction circuits. Noise is subtracted out of the signals and then they are ready to be output. Analog Y is output from IC204/84 AYO to the filter network consisting of FL202, Q203 and Q207. The Y signal is then passed through buffers Q211 and Q214. This signal is then sent to IC1410 Y Switch. IC1410 Y S witch is used to select either the Y signal from the 3D comb filter or the Y signal that is input from an S video or component video input. IC002/30 Killer controls this switching. IC002 (not shown) is the System Control IC. The main Y signal is sent to IC1402/34 Main Decoder Y In for PIP processing, to IC1404 YUV Switch for component PIP processing and to IC1407 YUV Controller for main picture processing. The C signal is output from IC204/83 ACO to the filter network FL201, Q202 and Q208. It is then sent through buffers Q209 and Q213. This signal is sent to the switching circuit on the U board. It is switched back to CN401/16 Main C. The Main C signal is then sent to IC1402/32 (not shown) Main Decoder C In through buffer Q1403 to be used for PIP. The Main C signal is also sent to IC206/5 (not shown) YCJ C In for the main picture.
IC203 8-Bit A/D Converter
Before the composite signal is input to IC204 3D Comb Filter, IC203 ADC digitizes it. The composite video signal is input at IC203/4 from the Y buffer circuit. In addition to the video signal input, IC203 ADC needs a clock and clamp pulse input. The clock input is a 4fsc (14.28 MHz) sine wave signal, which is sent from IC204/75 ALTF to IC203/24 CLK. The clamp pulse is sent from IC204/61 to IC203/6 PCL. This signal is at the H rate. The digital output from IC203 ADC is output from pins 13 17 and 20 22 to IC204 3D Comb Filter.
IC204 3D Comb Filter
The data from IC203 ADC is input to IC204/67-74 DYC02 DYC09. This data is synchronized to IC204/76 CSI, the composite sync input, and also by IC204/50 FSCI. The input at IC204/76 is the composite sync input from the main Y buffer and controls the timing generator inside of IC204 3D Comb Filter. IC204/50 FSCI receives a 3.58 MHz signal, which originates at IC205/57. IC205 is the YCJ. This signal controls the system clock internal to IC204 3D Comb Filter. Once the digitized video data is received by IC204 3D Comb Filter, it is written into IC204 internal EDO memory controller. The EDO control reads and writes data into and out of IC202 Frame Memory and also controls the addressing, write enable and refreshing of the frame memory. Data is read in and out between IC204/13-28 and IC202/2-5, 7-10, 39-36 and 3431. Addressing is done between IC204/9-2 and 99 and IC202/16-19 and 26-22. The write enable signal is sent from IC204/11 MWE to IC202/13 WE. The memory controller inside IC204 writes data to the locations addressed while WE is LOW. IC204/12 MOE is the output enable line and allows IC204 3D Comb filter to read data from it by IC202 3D Frame Memory. This line is connected to IC202/27 OE.
IC202 4MB EDO MSM514265C A BOARD DB1 Q210 BUFFER FL203, Q215, 216 B.P.F Q206,212 BUFFER VIN
4
22 20
IC203 DB8 17 A/D CONVERTER 13 uPC659 CLK 24 PCL 6 Q201,204 INVERTER SDA SCL
DYC0 2 MIO 28 0 74 DYC0 9 MIO 13
67
2 31 5 34
16
I01 AO 19
9 2
MAO
15
75 61
ALTE STO CSI SDA SCL
50
A8 22 7 36 I016 26 10 39 RAS 14
13
99 MA8
98 30
MRAS X1
11 12
76 60 59
10
WE 27 OE 28 LCAS
29
COMB C CN201 TO CN1703 5 U BOARD FROM U BOARD CN1701
MAIN V/Y 18
UCAS
FSC1
83
ACO MAIN Y
IC204 3D COMB FILTER uPC64O81
84
Q228 BUFFER Q1403 BUFFER
AYO
Q226,227 PEEKING
MAIN C 16
CN401 FSCOUT FROM IC206/57 YCJ KILLER FROM IC002/30
TO IC1402/32 MAIN DECODER/C IN
FL201,Q202,208 B.P.F Q209,213 BUFFER
2
IC1410 Y SWITCH
3 1 7
FL202, Q203,207 B.P.F.
Q211,214 BUFFER TO IC1402/34 CVBS/Y IN
TO IC206/64 YCJ/C IN
MAIN C
4TVP10 1200 1/18/00
COMB FILTER (V MODELS) 10
11
Picture and Picture (V Models)
Overview
The V model RA-3 chassis has features for PIP and P & P. The P & P feature is also unknown as Twin View. Since this unit has the P & P feature, the signals from both the main picture path and the sub picture path are input to the P & P controller. The output from the P & P controller can be used for Twin View or normal PIP.
Picture and Picture Controller
The main picture YUV is input to IC1405/10, 6 and 8. The Sub picture signals goes through a similar decoder and YUV Switch and are input to IC1405/71, 75 and 73. IC1405 is a picture-and-picture controller. It contains ADCs, reduction circuitry, memory control, display control and DACs. It is capable of showing two pictures of equal size side by side or free position PIP. The built-in memory controller of IC1405 P & P Controller is used to operate IC1401 V RAM. This 2 Meg of V RAM is used to produce the child or Twin View pictures. IC1405/40 SC is used to clock the data into the RAM. This signal looks similar to the DFB signal, which changes according to the window size selected. IC1405/31 DT is the data transfer output to the V RAM. IC1405/47 is the write enable line. IC1405/48 and 49 are the CAS and RAS lines used to refresh the memory. IC1405/86, 90 and 88 are the respective YUV outputs for PIP & P and P. These signals look like component video, but are reduced in time. This means that they do not use the full 1/60th of a second that would be used by a normal signal. The time that the signal appears is relative to the size of the PIP window. IC1405/93 DFB is the signal that will be used to determine the size and position of the PIP window. One of the waveforms below shows what the DFB signal looks like when P & P is selected. The other shows the DFB signal when a 1/9 PIP window is selected.
Main Y Signals
The Main Y signal from IC1410/7 is split to four places. They are: IC1407/19 YUV Controller TV IN for main picture. Q1406 Sync separator to IC1402 Main Decoder for decoder sync. IC1402/34 Main Decoder Y In for P & P. IC1404 YUV Switch for when a component input is selected as the main picture
Main C Signal
The Main C signal is input to IC1402/32. This signal will be used along with the Y signal to create component video signals.
Main Decoder and YUV Switch
IC1402 Main Decoder decodes the Y and C signals. The decoded signals YUV are output from IC1402/18, 19 and 20 respectively. These signals are then input to IC1404/2, 12 and 5. IC1402 has another set of YUV signals input at pins 1, 13 and 3. These signals are the Main Y signal. The U and V signals come from CN401/1 and 3. This connector is connected to the U board and couples the MUV and SUV signals from the Video 4 and Video 5 component inputs. IC1404/9, 10 and 11 are connected to IC1409/4 DVD SW. IC1409 is a D/A Converter that outputs either a High or a Low depending on which composite/S video input or component input is used for the main picture. The selected YUV signals are output at IC1404/15, 14 and 4. These signals are input back into IC1402 Main Decoder at pins 11, 12 and 13. These signals are passed through an auto pedestal adjusting circuit and output at IC1402/8, 7 and 6. These signals are then sent to IC1405 P & P Controller.
34
CVBS/YIN
RY RU RV VTIM
8 7 6 14
Q1409, 1410, 1412 BUFFER
Q1406 SYNC SEP C FROM Q1403 BUFFER
38
V SYNC HSYNC
TO IC1407/19 YUV CONTROLLER/TV IN P-Y 10 MY DY 86 TO IC1407/1 6 MU 8 MV B-Y DU 90 TO IC1407/3 17 MVSYNC 8 DV 88 32 DAO0 R-Y TO IC1407/2 Q1422 YUV SW. YUV SW. TO IC1407/6 YUV CONTROLLER AND IC206/5 YCJ
39 32
X1402 3.58MHz W101
SDA
SCL
CIN XNTSC 26 37 SDA IC1402 MAIN DECODER CXA2019A APC 29 36 SCL
18 19 20
11 W108 31 34 3 S101 S108 IC1401 2MVRAM A0 A8 6 36 39 25 22 19 15 SC 2 DT 7 WE 13 RAS 14 CAS 27
39 DAO7
DFB 93
Y OUT U OUT V OUT
RY IN 11 RU IN 12 RV IN 13 CERA 1
IC1405 P&P CONTROLLER SAB 9076 H 23 DA10 30 DA17
X1401 503kHz
2
YIN
YOUT 15
61
DYIN IC1404 Q1402 YUV SW BUFFER DVDSW BU4053 MAIN U FROM CN401/3 13 DUIN MAIN V FROM CN401/1 3 DVIN 6 INH MBLK FROM IC002/46 DVDSW FROM IC1409/4
Y FROM IC1410/7 Y SW.
12
UIN UOUT 14 5 VIN VOUT 4
1 9 10 11
50 AD0 58 AD8
SDA
60
SDA SCL A BOARD
SCL SY 71 SU 75
40
SC 31 DT 47 WE
49
SV 73
64
RAS 48 CAS
SVSY NC
SUB YUV AND SUB SYNC FROM IC1403
5TVP10 1201 1/18/00
PICTURE AND PICTURE (V MODELS) 12
13
Video Processing
Overview
The following section covers the video processing section of the RA-3 chassis. This drawing on the following page is a simplified schematic from the KP-53V80. It is nearly identical to the schematic for the S models. This circuit creates main picture RGB signals from either the Y and C signals from a composite, S video or tuner input, or YUV inputs from the main component video path. It also combines the PIP with the main picture if PIP is selected.
The inputs at IC1407/16 Color and IC1407/17 Hue are DC voltages that control the level of Sub Color and Sub Hue for the PIP picture. These voltage levels were preset at the factory and should not need adjustment. However, if necessary they can be changed by adjusting UVSC (Color) and UVSH (Hue) in the service mode.
YCJ
Here we will be discussing the following three functions of IC206 YCJ: Process the Main Y and C input and output them as RGB. Process the YUV inputs from IC1407 YUV Controller and output RGB signals for either a full picture from a component video input or a child picture from a PIP input. Output an FSC signal to be used as a reference by the comb filter. The main Y and C signals are input to IC206 YCJ at pins 63 and 64 respectively. The C signal is demodulated to its color difference signals B-Y (U) and R-Y (V). These YUV signals are referred to as "internal". These internal YUV signals developed from the Y and C inputs then go to a switch controlled from the input at IC206/5 YUV SW. This line switches the internal YUV or the external YUV from the YUV Controller onto the next stage of processing. If the external YUV inputs at IC206/7, 8 and 10 originated from a component video input, IC206/5 would be two volts and a Full DVD picture will be displayed. If the external input were from the PIP, there would be a waveform present at IC206/5. This would insert these inputs into the main picture to be output from IC206/20, 24 and 26 as RGB. Q220, Q219 and Q218 buffer these signals. After buffering, these signals are output to the CG board via CN204. The R and B outputs will be routed to their C board from the CG board. IC206 YCJ outputs a 3.58 MHz signal at pin 57. It is created using X202. This signal is used as a clock by the 3D Comb Filter in V models.
YUV Controller
IC1407 YUV Controller has three functions. They are: Switch the appropriate external YUV input to the YCJ. Switch the Main Y input to the TV out line for processing by the YCJ. Adjust the sub color and sub hue of the U and V signals. There are two sets of YUV inputs to IC1407 YUV Controller. They are from IC1405 PIP Controller and from the component video (DVD) inputs. The PIP inputs at IC1407/1, 3 and 2 are selected when the signal from IC1409/1 Full DVD is HIGH, allowing the signal from IC1405/93 DFB to control the switching at IC1407/6 YUV SW. When the output from IC1409/ 1 Full DVD is LOW, it disables the signal from IC1405/93 DFB. This places a low on IC1407/6 and the inputs at pins 21, 22 and 23 are selected. The selected signal is output from IC1407/8, 9 and 10. The Main Y input is from either a composite/S video input or a component input. This signal is input to IC1407/23 DVD Y and IC1407/19 TV In. If the main Y is from a composite/S video input, then the TV Out signal will be used for the main picture and for sync at the YCJ. If the main Y signal input to IC1407 YUV Controller is from the component input, it will be used by the YCJ for sync only. The Y Out at IC1407/8 would be used for the picture.
MAIN C FROM IC1702/58 DY FROM IC1405/86 Q1418 BUFFER Q1420 BUFFER
1
P-Y
YOUT 8
7
EY IN CN204 ERY IN ROUT 20 Q220 BUFFER Q219 BUFFER Q218 BUFFER
DU FROM IC1405/90
3
PB-Y RYOUT 9
8
9 7 5
DV FROM IC1405/88 MAIN U FROM CN401/3 MAIN V FROM CN401/1 MAIN Y FROM Q1402 MAIN Y SW. FROM IC1409/7 P+P/DFB FROM IC1405/ 93 FULL DVD FROM IC1409/1 COLOR FROM IC1409/5 HUE FROM IC1409/6
Q1419 BUFFER
GOUT 24
2
PR-Y BYOUT 10 DVD B-Y TVOUT 12 Q1424 TV BUFFER
10 64
EBY IN C IN Y IN IKIN 27 BOUT 26
TO CG BOARD CN731
21
63
TO V CHIP
DVD R-Y CLAMP 5 23 DVD Y
22 19 13 18
1
Q1414, 1416 55 BGP LEVEL SHIFT SDA SCL
4
TV IN DL YSW YSW
SDA SCL FSC 57 OUT IC206 YCJ CXA2147
6 7
CN003 CHECK CONNECTOR
3
Q1422 YUVSW
6
FSC1 TO IC204/50 COMB FILTER
Q1403 SYNC BUFFER
16
IC1407 YUV CONT. CXA2039 COLOR HUE
59
X202
YUVSW
5
A BOARD
17
VIDEO PROCESSING (V MODELS)
6TVP10 1205 1/24/00
14
15
On Screen Displays
Overview
On Screen Displays are generated by three different sources in the RA3 chassis. They are called Micro, V Chip/CC and PJ OSD. The Micro OSD produces the source (channel) display and Program Palette (customer menu). The V Chip/CC OSD displays V chip rating information and can blank the picture if the rating for a program violates the settings in the Parental Control Menu. CC information is displayed when CC On is selected using the remote control and the received signal contains CC information. The PJ OSD is used during the flash focus routine and when PJE adjustments are selected in the Service Mode. These three OSDs cannot be input to the YCJ at the same time. Therefore there is a mute system in place to blank each OSD at the appropriate times.
V Chip/CC OSD
IC1601 Main V Chip/CC creates this OSD. It outputs RGB that shows the rating of the program selected. It will also blank the screen and show a lock if the selected program is above the rating selected in the Parental Control Menu. If the CC option is turned ON using the remote control, then the CC text will be displayed at the bottom of the screen. The RGB signals are output at IC1601/18, 2 and 3. They pass through buffers Q010, Q014 and Q015 and are then input to IC206/14, 15 and 16. Q018 through Q023 are mute transistors that are controlled by the YS and YM lines from IC002 System Control IC.
PJ OSD
The PJ OSD is used to produce the RGB output during the flash focus routine. It also is the OSD used during the PJE Service Mode. The difference between the main OSD and PJ OSD in service mode is that the main OSD is green and the PJ OSD is white. The PJ OSD is output from two sources in the PJED circuit (not shown). RGB, YM and YS are directly input to IC206 YCJ. There are separate mute lines for each of the RGB sources in the PJED (not shown). See the appendix for more information on how the PJ OSD is created.
Micro OSD
The Micro OSD is created by IC002 System Control. It contains information such as channel number; video input source and the program palette menu. IC002 System Control creates RGB for these different on-screen displays. Q002, Q008 and Q009 buffer the RGB signals. After buffering, the RGB signals are input to IC206/14, 15 and 16. The YS and YM lines are used to place the OSD in the RGB outputs and mute the V Chip/CC OSD. The YS line is used to select the size and position of the OSD and the YM line is used to determine the level of shading. Here shading refers to the amount the video level is reduced beneath the OSD. This is evident in the Program Palette Menu when the video can be seen in the background while the menu is superimposed over it. The YS signal is input from IC002/36 to IC206/13. The YM signal is output from IC002/37 to IC206/12. The main OSD can be muted using Q011, Q012 and Q013. These mute transistors are controlled by IC002/35 Micro I. Main OSD will be muted when the PJ OSD is in operation and also while IC1601 Main V Chip/CC is being displayed.
MICRO R FROM IC002/32
Q002 BUFFER Q008 BUFFER Q009 BUFFER Q013 Q012 R 18 IC1601 MAIN V G 2 CHIP/CC 28622912 SSC B 3 7 VIDEO Q021 Q023 Q020 Q018 Q022 Q019 Q010 BUFFER Q014 BUFFER Q015 BUFFER Q011
14 RIN ROUT 20 15 GIN GOUT 24 16 BIN BOUT 26 TO CN731 CB BOARD VIA CN204
MICRO G FROM IC002/33
MICRO B FROM IC002/34 MICRO I FROM IC002/35 OSD YS FROM IC002/36 DISP YM FROM IC002/37
IC206 YCJ CXA2147
Y FROM Q1402 MAIN Y BUFFER
Q1601 BUFFER
SDA SCL BOX SCL SDA 17 14 15 Q1061 BUFFER
Q016 BUFFER Q017 BUFFER
12 YM
13
YS
RE-R PJ OSD FROM A RE-G RE-B BOARD RE-YM PJED BLOCK RE-YS
A BOARD
OSD (ALL MODELS) 16
7TVP10 1201 1/18/00
17
CRT Drive (CG)
Overview
The section discusses the CRT drive using the CG board. The CG board is similar to the CR and CB boards that drive the red and blue tubes. These boards use a discrete transistor circuit to drive the tube cathode. In addition to drive, each C board contains a circuit that monitors cathode current and converts it to a voltage. This voltage will be used in a loop between the YCJ and the CRT. We will also discuss the other inputs that are used to bias the tube.
during certain portions of the picture. If this shading input is missing, you may see an imbalance in color on either the right or left-hand sides of the screen. G2 is also a control grid used to limit the acceleration of electrons as they travel through the neck of the tube. These changes in the acceleration of the beam change the picture brightness. Each color has a G2 control that is preset at the factory. There is an input for the focus grid on each tube. This input is from the electrical focus control VR on the focus assembly. It should be set using a dot pattern for optimum focus.
CRT Drive
The output from the YCJ (not shown) is input to CN731/7 on the CG board. When this signal is input to Q731/B, the transistor begins to conduct. As current flows through Q731/C-E junction, current also begins to flow through Q722/B-E. Q722 is a common base amplifier and it passes the signal through its C-E junction. This signal is then sent to Q733/B. Q733 is a current amplifier that drives the cathode of the tube. When Q733 conducts, a voltage divider is formed between R739 and R736, and R741, Q733 and R743. As Q733 conducts harder, there is less voltage present at the cathode of the tube. When the voltage level of the signal from Q733/E goes lower, the tube is driven harder, making the picture brighter. D732, D733, D734 and C735 are present to prevent damage if the tube should arc.
IK Return
All Sony projection TVs employ an AKB (Auto Cathode Balance) circuit to automate the white balance (black balance) by forming a loop between the YCJ and the CRT. This loop compensates for losses in cathode current due to aging. The YCJ (not shown) outputs three reference pulses, each 1H long, that are delayed by 1H from each other for each field. The sequence for these pulses is Red, Green and Blue. These pulses cannot be seen on the screen since they occur in the over-scan region. When these pulses drive the tubes, current is monitored and converted to a voltage. This voltage is input to a window comparator whose output is used to adjust the drive level for each color. R743 is used to monitor the tube current on the CG board. As Q733 draws more current, there will be a rise in the voltage drop across R743. There are similar resistors to R743 on the CR and CB boards. All three pulses are combined on the CG board. All three boards contain a blocking diode similar to D735. These pulses are input to Q734 Buffer and then to CN731/1 which is connected to the A board. The IK return signal is then input to the YCJ (not shown). If a problem should occur anywhere in the CRT drive or tube biasing circuits that causes one of the color's IK return pulse to be incorrect, the picture will be blanked. This is indicated by the Self-Diagnostics as the Standby LED flashing five times.
Tube Bias
In addition to high voltage, the CRTs need other biasing to properly display a picture. First they need a heater voltage, which is developed by the FBT (not shown) on the G board. It is input to the G board at CN503/6 and 7. From there it is split to the CR and CB boards. The heater is needed to heat the cathode so that it can emit electrons. If it is missing, the cathode will not emit electrons and consequently there would be no picture. The G1 input on the tube is a control grid that is used for shading. Each of the tubes has a signal applied to G1 that makes the picture darker
D732 +200V R739 L731 R736 C735 D733 D734 R741 R742 SG731 R732 G2 1 TO FOCUS BLOCK CN737
C732
Q733 Q722 D731 CN731 G 7 FROM A BD. CN204 CLK 1 IK Q734 R747 CN732 1 1 3 CN733 IkR IkB C737 R744 D736 R743 C733 R733 Q731 R735 R746 R736 G1 G2 9 G1 F1 8 k H 7 H G1 G1 6
10 11
CG BOARD
FROM FOCUS BLOCK
C734 R737 D735
SG732
5
4
CN734 9 TO G BOARD 7 CN503 6 R753 CN735 9 TO CR 7 BOARD CN702 6 6 7 TO CB BOARD CN762
9V
CN736
CRT DRIVE (CG) 18
10TVP10 1213
1/24/00
19
S Model Video Path Block
Overview
The video path in the S model RA-3 chassis is different from that of the RA-2 chassis because of the addition of a component video input.
PIP Processing
The PIP processing circuit uses inputs from only the sub picture path. The main video path can be from two sources. They are Main Y and C or component video. If composite/S video input is selected for sub picture input to PIP, it is first decoded to YUV by the Sub Decoder and applied to the YUV switch. If a component video input is chosen, the Y signal is applied to the YUV switch along with the UV signals from the component inputs. These signals will then be selected by the YUV Switch and input to the PIP Processor. The PIP Processor outputs compressed YUV signals. It also outputs a YUV Switch signal that will determine the window size and position. These signals are sent to the YUV Controller, which will select either the PIP signal or the component input signal for output to the YCJ. The PIP Processor also outputs M H Sync to the Y Switch. The Y switch selects either the MY or M H Sync inputs. MY is selected for normal and PIP functions. M H Sync is selected when the user selects Auto Program or Favorite Channel function. When this sync signal is switched into the YCJ, it is placed on a DC level that causes a gray screen to be seen in place of the main picture.
Switching
There are three types of inputs located at the rear of the set. They are composite, S video and component video. The composite signal is input to the switching circuit and switched to the comb filter. After Y and C separation, the Comb Y and C signals are sent back to the switching circuit. Since a composite signal was input, this Comb Y and C will be switched out and become Main Y and C. If an S video input is used, the Y and C signal will be switched directly to the Main Y and C outputs. If a component input were chosen, the component Y signal would follow the same path as the S video Y signal, i.e., it would be switched directly to the Main Y path. The switching circuit also delivers any of the inputs to the Sub Video path. This means that SY, SC and SYUV signals are delivered to the sub video path.
OSD
On Screen Displays are generated by three different sources in the RA-3 chassis. They are System Control, V Chip/CC and PJ OSD and they share a common input to the YCJ. These circuits have a mute control system that keeps them from interfering with each other.
Main Processing
Two separate sources are used for the main video path. They are Main Y and C or component video. Main Y or C is applied directly to the YCJ. These inputs will be used if a composite/S video source is selected. If a component video input is chosen, then the Main YUV signals are chosen by the YUV controller and input to the YCJ. Keep in mind that these lines will also carry the PIP picture.
YCJ
The YCJ takes the inputs from the Main Y and C paths, the component or PIP from YUV Controller and the OSD RGB inputs. It processes these signals and converts them all to RGB drive signals, which are output to the three tubes.
MONITOR OUT CV C INPUTS Y SWITCHING Y UV COMPONENT Y MY YUV SW M H SYNC SC SUB UV SY Y SW MY Y YCJ PJED CV C COMB FILTER MC MAIN RGB VCHIP RGB OSD R G C B TO C BOARDS RGB SYSCON
YUV YUV YUV SW
PIP
YUV
YUV YUV CONTROLLER YUV PIP OR COMP. MAIN UV
SYNC TO DEFLECTION
SUB DECODER
S MODELS VIDEO BLOCK 20
17TVP10 1/18/00
21
Switching and Comb Filter (S Models)
Overview
This section discusses the inputs to the S model RA-3 chassis. The S models have two inputs for composite/S Video and one shared input that accepts composite, S video and component video. These signals are switched and if composite video is input, it is sent to the comb filter. The comb filter separates the Y and C signals and sends them to the A/V switch. The A/V switch switches the comb Y or component Y signals to the main Y path. The component U and V signals are switched by IC1903.
Video Inputs
The Video 1 and 2 inputs accept composite and S video inputs. If an S video cable is plugged in, then the composite video input is disabled. This is because when the switch in the S video connector is closed, a line on IC1101 A/V Switch is grounded. The Video 3 input also contains a component input. If Video 3 is selected and there is a cable plugged into J1106 Pr, then the Video 3 composite and S video inputs are disabled. This is because the switch in J1106 activates the Video 4 input. This will switch the Y from the component input to the main Y path. IC1903 YUV Switch switches the color components.
Switching and Comb Filter
The composite video inputs are input to IC1101 A/V Switch. Whichever input is chosen is output at IC1101/41. This signal is sent to Q1103 and Q1104 Buffer and then the filter network consisting of Q1701, FL1701, Q1702 and Q1703. After filtering, the signal is input to IC1702 Comb Filter. There is also a 3.58 MHz signal input to IC1702/11 CK In from IC206 YCJ. The comb filter separates the Y and C signals in the composite video signal. The C signal is output from IC1702/23 C Out to a filter network consisting of Q1704, FL1702, Q1707 and Q1708. This signal is then sent to IC1101/43. The Y signal is output from IC1702/25 Y Out to a filter network consisting of Q1705, FL1703, Q1706 and Q1709. This signal is then sent to IC1101/45. These signals are switched through IC1101 A/V Switch and become Main Y and Main C. If the switch from the S video input is closed, the internal switch in IC1101 changes position and switches the Y and C from the S video input to the outputs at IC1101/37 and 39. If the component video input is selected, the component Y is switched from the Y4 input to IC1101/39. IC1101 is also capable of switching any one of the input to the Sub Y and C Out pins 56 and 58.
A BOARD 19 C3 J1101 VIDEO 3 IN S VIDEO VIDEO 15 V3 IC1101 A/V SWITCH CXA 1845 3 1 4 2 17 Y3 21 SSW-3 35 SCL 34 SDA
L (MONO) AUDIO R
16 L3
18 R3
J1106 Y PB PR
24 Y4 SSW-4 28
TO IC1903 YUV SWITCH
KP53S70 VIDEO 3 INPUT
FSC OUT FROM IC206/57 TO J1105 MONITOR OUT YUV MUTE FROM Q1110 MTV V FROM MAIN TUNER FROM J1102 FROM CN1702/5 FROM J1101 FROM SUB TUNER
63 8 41
11
CKIN
V1
1 15 60
MAIN V OUT
Q1103, 1104 BUFFER Q1701, FL1701 Q1702, Q1703 CV
41
IC1702 COMB FILTER TC90A53F ADIN COUT
23
V2 V3 STV V6 YOUT2
39
YOUT
25
10
S VIDEO INPUTS COMPONENT Y
Y1
3
Q1102 BUFFER
Q1704, FL1702 Q1707, Q1708
Q1705, FL1703 Q1706, Q1709
Y2
17 24
YIN2
45
Y3 Y4 C1 C2 C3
MAIN Y TO IC1901/19 & 23 YUV CONTROLLER/TVIN+DVD Y CIN2
43
12
S VIDEO INPUTS
15 19
MAIN C TO IC206/64 YCJ/CIN
37
COUT2 SYOUT 56 TO IC1903/1YUV SWITCH/DYIN, IC1902/34 SUB DECODER/YIN AND IC1602SUB V CHIP TO IC1902/30 SUB DECODER/CIN
SDA SCL
34
SCOUT 58 35 IC1101 AV SWITCH CXA2079Q
SWITCHING AND COMB FILTER (S MODELS) 22
8TVP10 1207 1/14/00
23
Picture in Picture (S Model)
Overview
The PIP circuit is capable of taking any of the three types of inputs and compressing them. The compressed output is sent to the YCJ to be placed into the main picture. Only the sub input signals are needed for S models, unlike the V models which required sub and main picture inputs. The component video input can also be processed here for display as a child picture.
Sub Decoder, PIP Processor and YUV Switch
IC1902 Sub Decoder decodes the SY and SC signals. The decoded Y and C signals, now YUV, are output from IC1902/18, 19 and 20 respectively. These signals are then input to IC11903/2, 12 and 5. IC1902 has another set of YUV signals input at pins 1, 13 and 3. The Y signal is the SY signal. The Sub U and V signals come from the Video 3 component input at J1106. IC1903/9, 10 and 11 are connected to IC1904/3 DVD SW. IC1904 is a D/A Converter that outputs a voltage level dependent on the data it receives. This voltage level selects which input is used for the sub picture. The selected YUV signals are output at IC1903/15, 14 and 4 to IC1905/28, 30 and 32. IC1905 is the PIP Processor. It digitizes and compresses the input signals. It then converts the compressed signal back to analog and outputs YUV at pins 8, 9 and 7. These signals are input back into IC1902 Sub Decoder at pins 11, 12 and 13. They are passed through an auto pedestal circuit and output at IC1902/8, 7 and 6. IC1905 also outputs two control signals, M H Sync and SEL. The M H Sync signal will be used to create a gray screen during Auto Program and Favorite Channel functions. The SEL line becomes the YUV Switch input to the YCJ and YUV Controller.
Sub Y Signal
The sub Y signal from IC1101 A/V Switch is split to three different places. They are: Through Q1914 Y Buffer for component when a component input is selected for the main or sub picture. IC1602 Sub V Chip to determine if the child picture should be displayed in the PIP window. IC1902 Sub Decoder to decode the Y and C signals. Y is also used for H and V sync.
Sub C Signal
The Sub C signal is input through Q1906 Buffer to IC1902/32 C In. This signal will be decoded to its component form.
IC1905 PIP PROCESSOR SDA9288 YOUT 15 UOUT 14 VOUT 4 Q1916 Y BUFFER Q1917 Y AMP Q1918 BUFFER Y IN 28 SEL 12 Q1915 BUFFER Q1905 BUFFER Q1907 BUFFER Q1903 BUFFER
TO IC1901/6 YUV SW. Y RY IN TO IC1901/1 11 RY OUT 8 U TO IC1901/3 RU OUT 7 V 13 RV IN TO IC1901/2 RV OUT 6 12 RU IN 20 VOUT 19 UOUT 18 YOUT
IC1903 YUV SWITCH BU4053 DVD SW 2 FROM IC1904/3 V IN 5 U IN 12 Y IN 2 11 10 9 PB 13 DVD SW DU IN DV IN 3 DY 1 IN Q1914 Y BUFFER
SDA SCL
30 U IN 32 V IN 8 3 X IN YOUT 9 4 XQ UOUT 21 SDA 7 22 SCL VOUT
X1902 3.58MHz X1901 503.5kHz
26 XNTSC 29 APC 1 CERA IC1902 SUB DECODER CXA2019 37 SDA 36 SCL 38 VSYNC 39 H SYNC 34 CVBS/Y IN SUB Y 32 CIN TO IC602 SUB V CHIP
9TVP10 1206 1/18/00
FROM J1106 COMPONENT INPUT PR
Q1920 V BUFFER Q1904 SUB Y BUFFER SC OUT 1 FROM IC1101/58 Q1906 SUB C BUFFER Q1908 BUFFER
SDA SCL
SY OUT 1 FROM IC1101/56
PICTURE IN PICTURE (S MODELS) 24
25
RA-4 vs. RA-4A
Overview
This section discusses the similarities and differences between the RA-4 and the new RA-4A chassis. The new chassis is nearly identical in features and circuitry to the RA-4 and the key differences will be discussed in this manual. Please obtain a copy of TVP-08 for detailed circuit descriptions of the circuits not covered in this book. The part number for the TVP-08 training manual is TVP080299. An electronic version can be found at http://service.sony.sel.com.
· · · · · · · · · · · · ·
RA-4A Features
The KP-53XBR300 and KP-61XBR300 are the models that use the RA4A chassis. Screen size is the only difference between the two models. They share the following features with the previous RA-4 models: · · · · · · · · · Advanced Pro-Optic System Sony technology that allows full corner to corner focusing. New Extended Definition CRT Allows corner to corner focusing to be increased by 25% over last year's model. MICROFOCUS Lens System Digital Reality Creation (DRC) DRC uses line doubling and pattern recognition algorithms to take the NTSC signal to a near HDTV equivalent. Auto Focus Allows the setting of V and H center and skew by the customer at the touch of a button. This system differs from the one used by RA-3 because it does centering and skew. Full Digital Convergence Allows the servicer to converge the set in the coarse and fine modes. The fine mode uses a point to point system for adjusting. It is the same system used in the RA-3 chassis. High Performance Video Processor 3D Digital Comb Filter Brightview Dual Component Screen The screen contains a Thin Film Fresnel that brightens and sharpens the picture, and a Fine Pitch Lenticular screen that achieves higher resolution by using black stripes to increase contrast.
Built-in High Contrast Screen First Surface Mirror Advanced Velocity Modulation Advanced High Voltage Regulation Eliminates distortion and focus fluctuations that occur when changes in brightness levels cause changes in the high voltage. Noise Reduction Shading Compensation Eliminates color shift and hot spots that can occur due to the angle of the picture tubes to the mirror. Wideband Video Amplifier Multi Image Driver Digital-editing technology that provides versatility in controlling on-screen images. Used in Picture and Picture and Channel Index modes. Twin View Picture-in-Picture Allows for viewing two pictures simultaneously and the ability to expand either image up to double its normal size. Free Layout Picture-in-Picture Allows the PIP window to be placed anywhere on the screen. XDS (Extended Data Service) Receives data information services that some stations may broadcast. This data includes time, station call letters, etc. Dolby Pro Logic Surround Sound Center speaker input for use with a separate Dolby Pro Logic A/ V Receiver
The following features are new to the RA-4A chassis and are not found on the RA-4 chassis:
The following are minor circuit differences that will not be covered in this manual: The component values in the H deflection circuit have been changed because displaying 1080I input requires a different scan rate. The two different scan rates are 31.5 kHz for DRC, MID, 480I and 480P, and 33 kHz, which is used for 1080I video. There are now three separate banks of NVM for three separate registration modes. These modes are 1080I, 960I (Normal DRC picture) and 480P 16:9 Aspect Ratio. The set automatically selects the register bank of whichever signal is input. This is not covered because the adjustments remain the same for each mode. The pincushion correction circuit has been changed for greater efficiency. It is similar to the HV Regulation Control circuit used in the RA-4 chassis. New Picture tubes are used but are functionally the same. The 3D Comb Filter is identical but now resides on the BA board alone. The BA board plugs into the A board. The Shading circuit is different due to CRT burn countermeasures installed because of the use of the 16:9 aspect ratio on a unit with a 4:3 screen. These countermeasures are proprietary at this point and will not be discussed. The BR and BD boards are functionally the same, but the circuitry is slightly different. These boards plug into the A board and are replaceable. The pin out of their connectors remains the same.
"1080I Capable"
Enables you to display 1080I, 480P and 480I digital TV formats. The set does not accept 720P format. 480I signals are upgraded to 960I by DRC. The 480P signal can be displayed two different ways by changing the Aspect Ratio in the Set Up menu: V Compressed, 16:9; or normal, 4:3. These signals can be input to the Video 5 input only. Component or RGB with sync inputs are accepted using phono jacks. Not compatible with computers 5 BNC connectors. The Video 5 input cannot use the MID circuit; therefore, PIP and P&P functions cannot use Video 5.
Parental Control
Enables or disables the V chip rating system to block programs that might be inappropriate for younger viewers.
RA-4 and RA-4A Circuit Differences
The following differences will be discussed in this manual: Video Path The new video path will be discussed using an overall video block, a DTV Video Processing block and DTV Video Processing section which shows the IC and pin numbers that the DTV video path uses. Addition of V chip circuitry. The Main CPU controls the main picture V Chip. There is a separate Sub video V Chip. This will be covered in the video block section. VD Mute circuit Due to the fact that this set displays a true 16:9 picture in a cabinet with a 4:3 aspect ratio, the IK reference pulses that are output during every field need to be hidden. If correction was not made, these lines would be visible at the top of a 16:9 picture. This circuit takes the IK reference pulses and CC data and puts them in the normal 4:3 overscan area by placing a pulse into the vertical drive signal.
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Video Path Block
Inputs
The two tuner outputs and the four composite/S video signals that enter the unit are input into IC515 A/V Switch. IC515 A/V Switch switches these video signals to three different paths. The first is the main video path, next is the sub video path and last is the select output (not shown). The select output is used to send a composite version of an input to any composite or S video input to an output jack on the rear panel. Any composite/S video input to is selectable in the setup menu. The default setting is to output the main video. The Video 4 component inputs are input to IC1403 Main YUV Switch. The Video 5 DTV inputs are input to IC511 Video Processor. They are switched through IC511 Video Processor and input to IC1403 Main YUV Select. IC511 Video Processor also directly outputs Video 5 480P and 1080I as RGB to the tubes.
The outputs from IC1307 YUV Switch are then input to the BR board (DRC) and the BM board (MID). The BR board outputs 960I signals, which are the main video signals and are then input to IC511 Video Processor. The BM board is used for PIP and Twin View functions and its output is a 480P format. If the Video 5 DTV Input is 480I, it will follow the video path out of IC1307 through the BR board and output as 960I to IC511 Video Processor.
Sub-Video
The sub-video path is used to carry sub-video to the BM board where it is converted for PIP and Twin-View functions. Note: The Video 5 DTV Input cannot be used for sub video. A composite signal is input to IC515 A/V Switch and output to CM501 Glass Comb Filter and then input back to IC515 A/V Switch as Y and C. If the signal were an S Video input, it would pass directly to the Y and C outputs of IC515 A/V Switch. The C signal is input to IC1301 Sub Chroma Decoder while the Y signal is input to IC1302 Sub YUV Switch and then switched to IC1301 Sub Chroma Decoder. IC1301 Sub Chroma Decoder takes the Y and C input signals and converts these signals to component video. These sub Y, U and V signals are then input to IC1302 Sub YUV Switch. IC1302 Sub YUV Switch is used to select between the sub YUV inputs and the YUV input from the Video 4 component input. It also outputs the Sub Y signal to IC1401 Sub V Chip. Sub-video OSD from the BM board is input to the sub YUV signal. The output of IC1302 Sub YUV Switch is output as YUV into the BM board for use with PIP and Twin View functions. The signals from the BM board are input to IC511 Video Processor.
Main Video
The main video path is used to carry composite/S Video to IC2402 3D Comb Filter. If a composite signal is used, it is output to IC2402 3D Comb Filter. If an S Video input is used, then the Y signal uses the same path as the composite input. The C signal is output from IC515 A/V Switch to IC2402 3D Comb Filter. IC2402 3D Comb Filter is used to separate Y and C signals from a composite signal input. If a Y/C signal is input, then IC2402 3D Comb Filter will perform noise reduction and video processing functions. The C signal is output to IC1305 Main Chroma Decoder. The Y signal is output to IC1307 YUV Switch where it is switched through to IC1305 Main Chroma Decoder. IC1305 Main Chroma Decoder takes the Y and C input signals and converts these signals to component video. These become the main YUV signals are then input to IC1307 YUV Switch. IC1307 YUV Switch switches between the main YUV signals and the input it receives from IC1403 Main YUV Select. Whichever Y signal is selected is output to IC1008 Main CPU for V Chip/CC. The V Chip/CC Data is returned to IC1307 to be output as part of the main YUV signal.
IC511 Video Processor
The IC511 Video Processor is used to switch or insert the appropriate signals to its RGB output. These signals are the main YUV, sub YUV, OSD RGB, PJED OSD RGB signals and DTV YUV. These signals are converted to R, G and B to be output to the video amplifiers on each of the C boards.
MAIN Y/COMP TU501 MAIN TUNER TU502 SUB TUNER COMPOSITE AND S VIDEO 1-4 MAIN C
BA BOARD IC2402 3D COMB FILTER
C
IC1305 YUV IC1307 YUV MAIN YUV SW CHROMA CCD MIX DECODER MAIN Y MAIN Y
BR BOARD
PJED OSD
IC515 A/V SWITCH SUB Y C CM501 GLASS COMB IC1008 MAIN CPU SUB C
BM BOARD
PIP YUV CCD + V CHIP OSD Y FOR V CHIP YUV IC1302 YUV SW PIP OSD MIX
MAIN YUV
RGB
IC1301 SUB CHROMA DECODER
YUV
RGB
CV IC511 FOR VIDEO PIP PROCESSOR RGB OSD TO TUBES RGB BUFFER
VIDEO 4 COMPONENT
SUB Y SUB Y
IC1401 SUB V CHIP IC1403 MAIN YUV SELECT DTV YUV
RGB
IC1004 OSD PROCESSOR
VIDEO 5 DTV INPUT
RA-4A VIDEO PATH BLOCK 28
14TVP10 1/20/00
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DTV Video Processing Block
Overview
This section will discuss how the DTV signals are processed. This includes video path V Chip/CC processing, sync path and signal format detection. The RA-4A chassis accepts two types of DTV inputs, component and RGB with sync. There are three component inputs, Y, Pb (U) and Pr (V). The sync is contained in the Y signal. There are five inputs for RGB. They are R, G, B, HD and VD. The RGB and Y, Pb and Pr share the same jack. The user must select which type of input they are using in the setup menu. If the color appears wrong, ask the customer to make sure that menu setting is the same type as the input.
If IC1008 Main CPU determines that a 480P or 1080I signal has been input, the following occurs. The YUV signals that were input back into IC511 are processed and output as RGB to the tubes. The H and V sync from the Y signal is separated and output to the deflection circuits. The Y signal input with U and V signals input to IC1403 Main YUV Select is switched through to IC1303. IC1403 selects this signal because of the O DTV input received from IC1008 Main CPU. The signal is passed by IC1303 to IC1008 Main CPU. This signal is used for V Chip/CC. The Main CPU also outputs the name of the format through its OSD lines so it is displayed for the first few seconds after the input type is detected. If a 480I signal is detected, the signal will not be directly output at IC511's RGB outputs. Instead it will follow the path through IC1403 to IC1307. Here it joins the main video path and is output to the DRC circuit. However, its sync signals are output to the deflection circuits from IC511. If the Main CPU detects a 720P signal, the following will occur. The screen will dim and the words "This signal is not available" will be displayed. IC511 Video Processor will not output the RGB to the tubes or the sync to the deflection circuits. IC1008 Main CPU will output a command on the I2C bus that will instruct the OSD CPU to output a Low on the O 720P line. This line signals IC1307 to disable its DTV input and causes IC1303 to select the input from the Y path shown.
Component Input Selected
If the DTV signal input is component video and Y, Pb, Pr is selected in the setup menu, the set will work as follows. The Video inputs are sent directly to IC511 Video Processor. These signals are output from IC511 Video Processor back into itself and to IC1403 Main YUV Switch. The Y signal is also sent to the internal Intelligent Sync Separator in IC511. It is called intelligent because it determines which sync signal will be output from it. If HD and VD from the DTV Sync inputs are detected, then they are switched out to IC1008 Main CPU by default. If there is no VD or HD input detected, but the Y input contains sync, then the sync will be separated from the Y and output to IC1008 Main CPU. The Main CPU uses the sync input to determine the format of the incoming signal.
RGB Inputs Selected
If the customer inputs RGB, HD and VD, and RGB is se