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S/M No. : DSJ210BEF0
Service Manual
LCD PROJECTION TV
(HDTV MONITOR)
Model : DSJ-6000LN
CHASSIS : SJ-210
Caution
: In this Manual, some parts can be changed for improving, their
performance without notice in the parts list. So, if you need the
latest parts information,please refer to PPL(Parts Price List) in
Service Information Center (http://svc.dwe.co.kr).
DAEWOO ELECTRONICS Corp.
http : //svc.dwe.co.kr Nov. 2002
1. Safety precautions 2
2. Product specification 4
3. Remocon specification 5
4. Adjustment 7
5. Circuit Manual 11
6. Trouble shooting 27
7. Block diagram 35
8. Exploded View 36
9. Connection diagram 37
-1-
1. Safety precautions
CAUTION : Do not attempt to modify this product in any way. Unauthorized
modifications will not only void the warranty, but may lead to your being liable for any resulting property damage or
user injury.
Service work should be performed only after you are thoroughly familiar with all of the following safety checks and
servicing guide-lines. To do otherwise, increases the risk of potential hazards and
injury to the user.
SAFETY CHECKS
After the original service problem has been corrected, a check should be made of the following:
SUBJECT : FIRE & SHOCK HAZARD
1. Be sure that all components are positioned in such a way as to avoid possibility of adjacent component shorts. This
is especially important on those chassis which are transported to and from the repair shop.
2. Never release a repair unless all protective devices such as insulators, barriers, covers, shields, strain relief, and
other hardware have been reinstalled per original design.
3. Soldering must be inspected to discover possible cold solder joints, frayed leads, damaged insulation (including
A.C. cord), solder splashes or sharp solder points. Be certain to remove all loose foreign particals.
4. Check for physical evidence of damage or deterioration to parts and components, and replace if necessary follow
original layout, lead length and dress.
5. No leads or components should touch a receiving tube or a resistor rated at 1 watt or more. Lead tension around
protruding metal surfaces must be avoided.
6. All critical components such as fuses, flameproof resistors, capacitors, etc. must be replaced with exact factory
types. Do not use replacement components other than those specified or make unrecommended circuit modifications.
7. After re-assembly of the set always perform an A.C. leakage test on all exposed metallic parts of the cabinet, (the
channel selector knob, antenna terminals, handle and screws) to be sure the set is safe to operate without danger of
electrical shock. Do not use a line isolation transformer during this test. Use an A.C. voltmeter, having 5000 ohms per
volt or more sensitivity, in the following manner : connect a 1500 ohm 10 watt resistor, paralleled by a 15 mfd. 150V
A.C. type capacitor between a known good earth ground (9water pipe, conduit, etc.) and the exposed metallic parts,
one at a time. Measure the A.C. voltage across the combination of 1500 ohm resistor and 0.15 MFD capacitor.
Reverse the A.C. plug
and repeat A.C. voltage measurements for each exposed metallic part. Voltage measured must not exceed 0.75 volts
R.M.S. This corresponds to 0.5 milliamp A.C. Any value exceeding this limit constitutes a potential shock hazard and
must be corrected immediately.
-2-
Safety precautions
GRAPHIC SYMBOLS :
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the service
personnel to the presence of uninsu-lated" dangerous voltage" that may be of suffi-cienty magnitude to
constitute a risk of electric shock.
The exclamation point within an equilateral tri-angle is intended to alert the service personnel to the
presence of important safety information in service literature.
Fuse symbol is printed on pcb adjacent to the fuse, with " RISK OF FIRE REPLACE FUSE AS
MARKED". The symbol is explained in the ser-vice manual with the following wording or equiv-alent
CAUTION : FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH SAME
TYPE (6.3A, 125V)" and
" ATTENTION: AFIN D' ASSU UNE PROTECTION PERMANENTE CONTRE LES RISQUES D' INCENDIE,
REMPLACER UNIQUE-MENT PAR UN FUSIBLE DE MEME TYPE ET DE " 6.3A, 125V" .
SUBJECT : TIPS ON PROPER INSTALLATION
1. Never install any receiver in closed-in recess, cubbyhole or Closely fitting shelf space over, or close to heat duct,
or in the path of heated air flow.
2. Avoid conditions of high humidity such as : Outdoor patio Installations where dew is a factor. Near steam radiators
where steam leakage is a factor, etc.
3. Avoid placement where draperies may obstruct rear venting. The customer should also avoid the use of decorative
scarves or other coverings which might obstruct ventilation.
4. Wall and shelf mounted installations using a commercial mounting kit, must follow the factory approved mounting
instructions. A receiver mounted to a shelf or platform must retain its original feet (or the equivalent thickness in
spacers) to provide adequate are flow across the bottom, bolts or screws used for fasteners must not touch and
parts or wiring. Perform leakage test on customized installations.
5. Caution customers against the mounting of a receiver on sloping shelf or a tilted position, unless the receiver is
properly secured.
6. A receiver on a roll-about cart should be stable on its mounting to the cart. Caution the customer on the hazards of
trying to roll a cart with small casters across thresholds or deep pile carpets.
7. Caution customers against the use of a cart or stand which has not been listed by underwriters laboratories, inc.
For use with their specific model of television receiver or generically approved for use with T.V.' s of the same or
larger screen size.
Caution for servicing
When the general troubles happen, Remove the back cover of the TV set. But , however if the components (the Air
filter, Lamp, Lamp detect switch, or LCD Engine driver PCB, etc) in the front of TV set is out of order, Remove the
speaker grill and the front panel of the TV set.
Specially, First you have to plug out socket , for exchanging the Fuse of TV set,.
When Lamp driver is operated, the high voltage(13~20kV) is generated from the Lamp. Therefore the person only
who has the enough knowledge for the high voltage must handle it with care.
-3-
-4-
-5-
KEY Button and Function
KEY BUTTON FUNCTION
Remote controller Green - TV in use
Lamp Orange - VCR in use
Red - CATV in use
POWER Use turning on, turning off TV
TV/VCR/CATV TV / Video / Cable Converter
Use to select Use to select channel directly 0~9
channel directly
100 Button Use it when selecting a channel number of over 100
RECALL It displays currently watching TV channel and its input signal.
VCR Function REW, PLAY, FF, STOP, REC, PAUSE.
MENU Use it to make picture adjustment, screen format, sound adjustment, input
selection, and utilities.
TV/ VIDEO Use this function to make video input selection.
It changes in the fallowing sequence
TV VIDEO 1 VIDOE 2 VIDEO 3 DVD TV
PC/DTV PC DTV can be selected alternately.
Use it when selecting either PC or DTV.
Channel/ Volume Use this function to select the channel / to adjust the volume.
PREV It returns to previous channel.
MUTE Use to mute.
SCREEN MODE This feature converts the screen mode each time you press the button
from Normal Bright Soft User
SCREEN SIZE This feature converts the screen size by changing its aspect ratio. Each
time you press the button, it will be change from
Normal Wide Panorama Enlarge(LB) Enlarge(LBS)
DOLBY SOUND This button allows you to choose one of the Pro-logic modes.
Normal Off 3-stereo Wide
SOUND MODE This feature allows you to choose the mode, Each time the button is pressed,
it rotates from Normal Music Movie News User
ADD/ERASE This feature either momorizes the current channel or erases a channel that
has previously memorized.
CAPTION This feature allows you choose the caption. Each time the button is pressed it
rotates from CC1 CC2 CC3 CC4 off
SLEEP This feature is use to set up the time out of automatic turn off..
MTS This feature allows you to select the language while broadcasting.
TV/CATV This button allows you to select the broadcasting alternately.
-6-
4-1. Adjustment in Production
Set all adjustment after about 5 Min s heatruning
Note : Lamp wattage converted automatically from 160W to 130W after 3 min.
Heatrun must be operated after inputing White_Pattern, (no concerned `No Signal')
Note : You select `White_Pattern' in `Test Pattern' of SVC Menu.
You select Screen Size is `Wide' and Screen Mode is `Normal'.
1) How to Fix Engine.
You measure the range of screen s shifting after assembling set.
But, in case of the range is over spec ( H : 7mm, V: 3mm, Tilt : 2mm), adjust again in Local CH 8(RETMA) of
the factory.
2) Adjustment H/V Position.
You select PC Mode to receive reference signal of VG-828 (Program #. 954 : 720p Pattern. 990 : Display
Position Pattern)
Note : LCD Panel is 720p.
You can adjust screen size and position in operating User Menu ( Horizontal Size & Position, Vertical Size &
Position).
3) White balance adjustment
Input the signal of VG-828 (Program #. 946(NTSC) White Window Pattern.(20 20)) to Video 1.
Confirm the initial data of PW364 Mode in SVC Menu.
Adjust the White Balance changing R/G/B Gain after setting signal level 100IRE( 255).
How to adjust temperature of color. : X = 0.265 0.01 0.270 0.01.
You can set Luminance level .
Adjust the White Balance changing R/G/B Bias after setting signal level 40IRE( 102).
Input the signal of VG-828 (Program #. 972(1080i) White Window Pattern.(20 20)) to DTV.
Adjust the White Balance changing AD9884 s Register Value(CXA1315A, CXA1315B, CXA1315C) after
setting signal level 40IRE( 102).
Adjust the White Balance changing CXA2101 s Register Value(R-Drive, G-Drive, B-Drive) after setting
signal level 40 IRE( 102).
Confirm the range of White Balance being in limit and measure Luminance value
-7-
4-2. SERVICE MODE
To operate Service : Press the USER Remote controller in order starting with CH Up Mute RECALL
Mute (You can operate in case INPUT is TV mode, or being input signal)
Service Mode
SVC MAIN (Initial Data of the Service mode)
PW364 (Adjusting Brightness Contrast and White Balance of full input)
AD9884 (Adjusting Brightness Contrast of DTV/ PC input)
CXA2101 (Adjusting Brightness Contrast and White Balance of DTV input)
VPC3230 (Adjusting Brightness Contrast of TV / VIDEO/DVD input)
Test Pattern (Displaying in order R G B W BLK
Lamp Watt (Adjusting Lamp Wattage 160W or 130W)
ENG Control (Adjusting LCD ENGINE UNIT)
Use Time (Total usage time of LCD panel)
Factory Set (operating Initalization)
DSJ6000LW200209181500 (Model name, micom version)
* PW364 (Adjusting Brightness Contrast and White Balance of full Iinput)
Item Initial Value Description
S Bright 64 Screen Brightness Fixing Value
S Contrast 64 Screen Contrast Fixing Value
R Bias 63 Red Color of Low level signal Adjusting Value
G Bias 63 Green Color of Low level signal Adjusting Value
B Bias 63 Blue Color of Low level signal Adjusting Value
R Gain 63 Red Color of Low High signal Adjusting Value
G Gain 63 Green Color of Low High signal Adjusting Value
B Gain 63 Blue Color of Low High signal Adjusting Value
-8-
AD9884 (Adjusting Brightness Contrast of DTV/ PC input )
R Gain 148 Fixing Value RED MIN 148
G Gain 148 Fixing Value RED MAX 148 Reading velue
B Gain 148 Fixing Value GRN MIN 148 automatirally
CLP PL 4 Fixing Value GRN MAX 148 accorling to
CLP DR 4 Fixing Value BLU MIN 148 adjustment state
Phase 15 Fixing Value BLU MAX 148
ITEM Initial Value Description
CXA1315A 42 Adjusting Red Color of Low level signal Adjusting Value
CXA1315B 40 Adjusting Green Color of Low levelsignal Adjusting Value
CXA1315C 40 Adjusting Blue Color of Low level signal Adjusting Value
CXA2101 (Adjusting Brightness Contrast and White Balance of DTV input)
ITEM Initial Value Description
Picture 63 Contrast Fixing Value
Bright 8 Brightness Adjusting Value
R Drive 22 Adjusting Red Color of High level signal Adjusting Value
G Drive 18 Adjusting Green Color of high levelsignal Adjusting Value
B Drive 16 Adjusting Blue Color of high level signal Adjusting Value
BLK BTM 15 Fixing Value
VPC3230 (Adjusting Brightness Contrast of TV / VIDEO / DVD input)
ITEM Initial Value
Sub Bright 0 Adjusting Value
Sub Contrast 20 Adjusting Value
Test Pattern
R => G => B => W => BLK
Lamp Watt (160W is 25% brighter than 130W but lifetime of Lamp is shorter)
160W
130W
ENG Control (Adjusting LCD ENGINE UNIT )
GAMMA (NORMAL, Natural1, Natural2) : NORMAL(NO GAMMA compensation ),
NATURAL1=NATURAL2
ROTATION Scren Rotation (0, 90, 180, 270)
COLOR Screen s color compensation
sub CPU sub CPU s initalization in Engine Unit
-9-
TEMP Detecting the femperature in the inside of ENGINE
V-T Engine V-T compensation
*Use Time : Total usage time of LCD panel
*Factory Set (Operating Initalization)
- 10 -
1. Specification / Feature
1-1. Product Specification
1-2. Product Feature
1-3. General Block Diagram
2. Power Supply
2-1. Summery
2-2. Block Diagram
2-3. Power structure
2-4. Power Action manual
3. Sound & Audio Amp
3-1. Summery
3-2. I/O Specification
3-3. Block Diagram
3-4. Action Manual
4. Video
4-1. Summery
4-2. Block Diiagram
4-3. Video Circuit Manual
4-4. *IF and Video Manual
5. Engine Drive
5-1. Summery
5-2. Block Diagram
5-3. Action Manual
- 11 -
1.Specification / Feature
1-1.Product Specification
- 12 -
1-2.Product Feature
TV Turn on/ off : The Lamp feature
When the main power lamp flickers on green, the screen will gradually turn on. During this instance, the power
button will not operate. When the process is completed, the main power lamp lights on green.
It is LCD-Projection TV characteristics that it takes a little while for the video to be displayed on the screen
when it is turned on. This is not malfunctioning; thus, please be patient and wait for a moment.
The degree of brightness will decrease insignificantly after 3 minutes is passed. This is not a breakdown; it is
only using a power saving process to maximize the lamp s lifetime. (Lamp watt : 160W -> 130W)
When the power buttons are pressed, the main power lamp may flicker in green, but the secondary power lamp
may flicker in red and orange alternately. In this case, the TV s main power has been erroneously pressed, or
has been turned off improperly by a power stoppage or by any other reason. However, please wait for an
instant, and the TV will be back on (the latest 1min. 30sec.) since this is not a malfunctioning of the product.
Turning off the TV set.
Press the power button on the remote controller or that of the TV set. Audio and Video will be turned off and
the main power lamp will flash. In green at this time. This is not malfunctioning nor an error; it is just a process
of cooling the lamp off. During this time, the power button will not operate. A red light will light up after a
minute.
1-3. General Block Diagram
- 13 -
2. Power Supply
2-1. Introduction
The POWER PCB is composed of 140W Power for 60 LCD PTV(DSJ-6000LN) as well as
the Power that makes 380V and 18V primary voltage for Ballast.
2-2. Block Diagram(attach)
2-3. Power Supply Component
(1) Input Power : 100V ~ 240VAC, 50/60Hz
(2) Consumption Power : 270W
(3) Power Supply for the secondary side : See the table below.
No. location voltage Function Current remarks
1 T802 D5V Main and Video/Engine Power 1,000mA F/B Line
2 T802 33V Tuning B+ 3mA
3 T802 A5V Main and Video Power 1,000mA
4 T802 12V Main and Video Power 300mA
5 T802 9V Main and Video Power 80mA
6 T802 18V Ballast and PFC Control Power 150mA Primary
7 L805 380V Ballast Power 470mA Primary
8 T802 17.5V Engine Power 300mA
9 T803 7V/10V Engine Fan Power 1,000mA 10V (more than 45 degree
of Engine temperature
10 T803 +15V Audio Power 3,000mA
11 T803 -15V Audio Power 3,000mA
12 T801 ST5V Stand-By Power 600mA
2-4. Description of Operation
(1)Power Supply and Stand-by Power
(1-1) The voltage coming through Bipolar Power Code (PC801) passes through the
Line Filter composed of EMI Filter (L801, L802), X-Capacitor (C801, C803,
C806), and Y-Capacitor (C822, C823) and is rectified and smoothed in the Bridge
Diode (D803, D806, D831, D832) through the Mimetal that is the P303E
Temperature Sensor (Power OFF when Lamp Temperature 125 ~ 135).
(1-2) The smoothed voltage is supplied to the TOP232P that is STAND-BY POWER
IC(1804), and the TRANS secondary winding supplies STAND-BY Power (5V)
for U-COM.
- 14 -
(2) MAIN Power Operation
(2-1) PWR SWITCH ON(HIGH) Signal is supplied from U-COM to the Base of Q804 via
P805M CONNECTOR, Positive Terminal Relay(Y801) is activated, then Starting
Voltage is supplied to the No.4 pin (Vin) of STR-F6656(IC802, IC803) via R836 and
R844.
(2-2) AC Power is rectified in the Bridge Diode(D801), and is applied to P winding of the
TRANS, and reaches 16V of TRANS Auxiliary Winding (No.7 pin), then Control
Circuit is active by the operation of Start Circuit.
(2-3) The winding voltage of the Auxiliary Winding (No.6 pin) is rectified, 18 V is upplied
to 1601(FA5332M) No. 3/16 pins, and the phase of Voltage/Current is compensated,
No.13 Pin Reference Voltage/No. 15 Pin OSC Timing C/R oscillates internally, and
mixed to AND Gate, passes to No.13 pin, and its voltage is elevated to DC380V
from L805 by FET Switching via Debias Stabilization Circuit (Q801/802). The
elevated 380V
is smoothed through Diode(D802), and is supplied to the Ballast via P804B.
(3) Specification of STR-F6656
STR-F6656 is the Hybrid IC for the power of Flyback Converter-type Switching where
Power MOSFET and IC for Control is installed. The characteristics of this IC are parts to
be added are just a few, and various protection functions such as Transient Current
Protection, Transient Voltage Protection, Overheat Protection), and has the Quasi-
Resonance function proper for miniaturization and standardization.
The detailed specifications of this IC is as follows.
Pin Number Symbol Name Function
1 OCP/F.B OCP/F.B OCP detection input and Feed Back
2 S Source MOS FET Source
3 D Drain MOS FET Drain
4 Vin Vin Control circuit voltage Input
5 GND GND Ground
Symbol Function
OVP Over voltage protect
TSD Over temperature protect
- 15 -
(3-1) Power Supply for Vin
When Vin Terminal (No.4 pin) voltage that is charged to C821, C830 through the Starting
Resistance reaches 16V(Typ), the Control Circuit inside the F6656 starts to operate. Here,
the Circuit Current is limited to 100 A(MAX) before F6656 operates, so the high Starting
Resistance (47K ,2W) is used. After F6656 operated, the voltage coming out of D
winding of TRANS (T802, T803) is rectified and smoothed, supplying the stable voltage
to the Vin terminal. Here, dl winding is rectified and smoothed via D812, D816, C821,
and C830, and about 16V is supplied to the Vin terminal (No.4 pin) of F6656.
(3-2) OCP/F.B Terminal (Oscillator, Electrostatic Voltage Control Circuit)
Inside the F6656, there is the Oscillator that generates Pulse signal for controlling
electrostatic voltage in the secondary side by turning ON/OFF the MOSFET using the
charging/discharging of C . When AC input is high or Load Current is low, the inflow of
the current of F/B terminal increases, and ON time decreases. The Oscillator has the
Transient Current Protection Circuit (O.C.P. circuit) of Pulse by Pulse type that controls
the oscillator s output by detecting MOSFET Drain current s peak value per every pulse.
(3-3) D/S Terminal (Driver Circuit)
This Circuit is the circuit that charges/discharges the capacity between Gate-Sources of
Power MOSFET by receiving Pulse signal.
(3-4) Latch Circuit
This Circuit is the circuit that stops Power Circuit by keeping the output of the Oscillator
to LOW when the Over Voltage Protection Circuit (OVP) and Overheat Protection Circuit
(TSD) operate. The Sustaining Current of the Latch Circuit is 400 A(MAX) when Vin
terminal voltage is 8.5V, so if the current over 400 A is made to flow to the Vin terminal,
the Power Circuit keeps normal. This circuit activates the Latch Circuit only when OVP,
TSD Circuit operates or when external signal input is kept over 10 sec, by setting the
delay time in accordance with C inside F6656 in order to prevent erroneous operation
due to Noise, etc. Besides, even though Latch Circuit operates, it is operated in
electrostatic power circuit in the Control Circuit so the Circuit Current gets elevated,
decreasing the Vin terminal voltage dramatically. When Vin terminal voltage gets below
Termination Voltage (10V TYP), the Circuit Current increases again, so Vin terminal
oltage decreases. That is, Vin terminal voltage increases or decreases between 10V and 6V
when Latch Circuit operates, it is possible to prevent Vin terminal voltage rising
bnormally. To cancel the Latch Circuit, Vin terminal voltage should be decreased to below
6.5V. Generally, it can be cancelled by turning off the AC power.
(3-5) Overheat Protection Circuit (TSD)
This Circuit is the circuit that operates the Latch Circuit when the Frame
temperature exceeds 150 degrees (TYP). In this circuit, the real temperature detection is
- 16 -
carried out in the Control System, but MOSFET as well as Control Circuit element is on
the Frame, so the circuit operates same for the overheat of MOSFET.
(3-6) Transient Voltage Protection Circuit (OVP)
This Circuit is the circuit that operates the Latch Circuit when the Vin terminal voltage
exceeds 22V (TYP). Basically, this circuit protects Transient Voltage, but the Vin
erminal is supplied from the TRANS Auxiliary Winding, and this voltage is roportional
to the output voltage, so it operates when the secondary side out is transient voltage such
as when Control Circuit is open.
- 17 -
3. Sound & Audio Amp
3-1. Introduction
Sound Processor is composed of Switching that selects signal proper to the Select Mode among
Sound Signal of the Video Input (SIF, DVD, Input 1/2/3) and the Sound Signal of Graphic
(DTV, PC); and Signal Processor that generates Sound Signal (C, W, SL, SR) which is Dolby
decoded through MAIN L/R Sound Signal and IIC(SCL/SDA) Interface. Besides, it is composed
of Amplifier that amplifies the signal generated by Volume Control Block to the sound signal
proper for speaker capacity.
3-2. I/O Description
(1) Sound Processor
Partition NAME DESCRIPTION
SIF SIF Signal from TV TUNER
Sound NTSC L/R The Selected Audio signal of 3 input Video
INPUT DVD L/R, DTV L/R The Audio signal of the DVD & DTV
PC L/R The Audio signal of the PC
I2C SCL, SDA The controlling I2C signal of SOUND IC & DOLBY IC
MAIN L/R The Audio signal L/R
C The Audio signal Center
Sound W The Audio signal Woofer
SL/SR The Audio signal SURROUND L/R
HP L/R The Audio signal HEAD_PHONE
OUTPUT MON L/R The Audio signal MONITOR
VOL L/R Volume control L/R SPEAKER
VOL C Volume control CENTER SPEAKER
Control VOL W Volume control WOOFER SPEAKER
VOL SL/SR Volume control SURROUND L/R SPEAKER
A_MUTE AUDIO MUTE
- 18 -
Partition NAME DESCRIPTION
INPUT SOUND PROCESSOR Audio signal (the excepted HP L/R, MON L/R)
L/R Output L/R SPEAKER
C Output CENTER SPEAKER
OUTPUT
W Output WOOFER SPEAKER
SL/SR Output SURROUND L/R
3-3. Block Diagram
3-4. Description of Operation
Sound Processor is composed of Switching that selects signal proper to the Select Mode
mong Sound Signal of the Video Input (SIF, DVD, Input 1/2/3) and the Sound Signal of
Graphic (DTV, PC); and Signal Processor that generates Dolby Prologic Sound Signal via
Sound DSP. In the VIDEO the SIF signal is received from TUNER in MSP3440G (SOUND
PROCESSOR IC) generates sound signal L/R. Besides, Among the Sound Signal (NTSC
L/R: VIDEO_1/2/3 Sound Signal L/R selected from the TUNER Sound Signal L/R,
CXA1855 (VIDEO SWITCHING IC), and DVD Sound Signal, a proper sound signal is
selected, then it is outputted to MAIN L/R. In the GRAPHIC, a proper signal is selected in
DPL3519A among the sound signal of DTV and PC, and outputs to MSP3440G, so MAIN
L/R can be selected. Also, D/A converted Sound Digital signal is generated to SERIAL
ATA(IS2_DA, 12S_CL, 12S_WS, I2S_OUT), so Central Sound signal (C) which is DOLBY
PROLOGIC Sound Signal, Woofer Sound Signal (W), and Surround Sound signal(SL/SR) is
generated.
- 19 -
In the AMPLIFIERM, the signal component that passed Volume Control Block is amplified
to the respective GAIN (MAIN L/R, C, W, SL, SR). L/R SOUND and SURROUND L/R
Sound are adjusted simultaneously, besides L/R Volume Balance can be adjusted. The Sound
of Center and Woofer is adjusted independently, and Volume Balance cannot be adjusted. The
Sound Signal decreased by Internal Volume Control of MS3440G and DPL3519A is
amplified through TDA7265 (25W+25W STEREO AMPLIFIER with MUTE). Main Sound
L/R and Central Sound Signal is connected to each Speaker via connectors, and the Sound
Signal from Woofer and surround is connected to external Jack, then is outputted when
additional Speaker is connected.
- 20 -
4. Video
4.1 Introduction
The VIDEO Signal Processing Circuit of DSJ-6000LN converts PC signal(VGA~UXGA),
DTV signal (Y, Pb, Pr 1080i, 720P, 480P@60Hz), DVD signal (Y, Cb, Cr@60 Hz), Y/C
signal (60 Hz) as well as Image Processor PW364, to HD Video signal (1280 x 720 :
Progressive) proper to LCD Projection TV device of this appliance type. It is composed of
Video Processor, Digital TV Processor, Graphic Video Processor, Image Resizing Part
(PW364), LVDS Output, CPU Circuit for System Control.
4-2. Block Diagram
4-3. Circuit Manual
(1) Video Processor Circuit
Video Processor receives Video signal whose Y/C Color Difference is separated, then
converts A/D in VPC3230 that is Video Decoder, and processes Component Video Signal
(Y/UV), and converts the Interlaced Video signal received from Line Doubler SDA9400 to
Progress Video signal. Also, DVD signal that is entered in Component Video signal enters
to another terminal, and processed likewise.
- 21 -
(2) Digital TV Signal Processor Circuit
The Digital TV signal entering to the Component type is processed in CXA2101A that is IC
for processing TV Video Signal, and is outputted to Analog RGB signal, then is switched
according to the RGB signal of OC.
(3) Graphic Video Signal Processor Circuit
The RGB signal selected in the Digital TV signal and PC signal is converted to two channel
48bit digital RGB signal in AD9884D which is high speed A/D converter.
(4) Image Resizing Circuit
The Digital Video signal and Digital Graphic signal that enter to PW364 from the previous
part are selected, and Image Resizing is done that converts those signals in the proper form,
then the signal is outputted in 24bit RGB signal.
(5) LVDS Output Circuit
The Video signal and Synchronizing signal (H,V sync) converted to the display format of this
appliance system is converted to LVDS signal in the TH63LVDM83A that is the LVDS
Transmitter in order to transfer to LCD Engine.
(6) System Control Circuit
This system is composed of two U-COM, and the overall system control is done in the Main
U-COM, the signal is sent that controls all IC except Engine Block, and the System Control
controls regarding image resizing, and process the key entered from the Front Key, then
controls the front-display LED.
4-4. IF Circuit & Video Circuit Structure
This IF Circuit and Video Circuit receives NTSC broadcasting signal and its corresponding
external video signal, DVD, DTV, PC signal via I set of Antenna Input in the terminal board and
6 set of external video jacks including 3 set of NTSC video jacks, then video processing is done
properly.
(1)IF Circuit
IF Signal Processing is as follows.
(1-1) NTSC TV RF Signal received from the Antenna Input of the Terminal Board enters to
TUNER (TU601).
5V, 9V : TUNER Main Power
33V : Voltage for Tuning (Vt Voltage)
(1-2) A desired broadcasting channel is selected from the TV broadcasting signal selected by
Remote Control or Switch in such a way that the data
sent from pins of SDA and SCL of -COM are routed to Pin 4 and 5 of DATA/CLK of
- 22 -
TUNER, and those data are converted to TUNER (IF) signal in the PLL inside the Tuner and
Tuner IC.
(1-3) The carrier of the selected broadcasting signal is converted to PIP frequency (P:
45.75MHz, S: 41.25MHz, C: 42.17MHz), and modulated to IF signal of TU. The
modulated IF signals are converted to Composite Video and SIF signal in the internal IF
Module, then are sent to each Video_Out Port(#16) and Audio_Out Port (#13).
(2) NTSC Video Signal Switching Circuit
Signal Processing of Video Signal Switching Circuit is as follows.
(2-1) In the case of NTSC ANT Input, the Composite Video Signal sent from Tuner
Video_Out Port (#16) is sent to TV Pin 41 of Video Switching IC CXA1855(U101) via
Tr Buffer(Q101), and 3 set of external Video Jack Input 1, 2, 3 are, respectively, sent to
Switching 1,2,3 Input Port of CXA1855.
(2-2) The 4 set of NTSC Video signal sent to CXA1855 is switched to the inside and is
outputted in the Video_Out 2 terminal. At this time, one of the Composite signal
coming from Vout Pin 23 and Yout2, Cout2 Pin (19, 21) is selected via Switching IC
MM1232(U104).
(2-3) The selected Composite or Y/C signal is sent to 3D Comb Filter IC uPD4082(U105) via
Filter, and is processed. This IC is three dimensional Y/C Separate IC, and has the
external AD Converter and 4M bit EDO Memory, and process Y/C separation and
YCNR (YC Noise Reduction) when Composite and Y/C signals are coming.
(2-4) The Y/C signal processed in D Module is routed to Video Board via TR Buffer (Q106,
Q107), respectively.
(2-5) In the case of Monitor Out, 3D Module Input Composite signal and 3D Module Output
Y/C signal are outputted via Buffer (Q102, U102, U103).
(3) DVD, HDTV, PC SIGNAL PROCESSING Circuit
Input of DVD, DTV, and PC signals are sent to A/V Board and Side Board Jacks, then sent to
Video Board directly.
- 23 -
- 24 -
5. Engine Drive
5.1 Introduction
The Engine Drive Signal Processing Circuit of this DSJ-600LN is the circuit for
generating and supplying Video Signal and Driving Signal to activate 3 LCD Panels. It is
composed of RGB Video Processing, Panel Driving Signal Generating, and Panel
Auxiliary Signal Generating sectors.
5.2 Description of Operation
5-3. Circuit Manual
(1) RGB Video Signal Processing Circuit
RGB 10 bit of Digital Video signal (3.3 Vpp) processed by G/A for LCD Panel and
IC(SLA550TH) for compensating Unit is outputted along the LCD Panel connected to LCD
driving board in such a way that 10 bit digital data are converted to the Video Signal for
driving LCD of 2x6 channel their levels are adjusted (10.0Vpp; 2.0V~12.0V) by Serial D/A
Converting IC(M62393).
(2) Panel Driving Signal Generating Circuit
The Panel Driving Timing Signal (3.3Vpp) developed from IC(SLA550TH) for processing
Panel Signal is supplied to the LCD Panel by Level Shifter IC (ET1030F0A) by doing level
shift to Level(15.5Vpp) necessary for driving the Shift Register inside the LCD Panel.
- 25 -
(3) Panel Auxiliary Signal Generating Circuit
The Panel Driving Auxiliary Signal developed from IC(SLA550TH) for processing Panel
Signal is supplied to Panel through 4 each composite Transistor(XN4051) by doing level shift
to the Level(10.0Vpp; 2.5V~ 7.5V) necessary for free-charging the Video Line inside the
Panel by the Level Shifter IC(ET1030F0A).
- 26 -
No "Power On"
(Timer on/off and the main
power lamp lighting in red)
Check fixing state of air filter OK
Check whether Sensor (DETECT S/W)is
(Power On after removing air filter and wrong or not, and fix air filter correctly
pressing Detect S/W by hand or tape)
NG
After checking Detect S/W is wrong or
Check Fixing state of lamp Door side OK
not, pull down and fix Door slide
(After pulling up Door side, Power On
correctly
when pressing Detect S/W on the left
side of engine by hand or tape)
NG
0V
Check voltage of pin 14 (PWR-CTL) in Replace VIDEO PCB ASSY
P612V at Main PCB
When turning set on, the voltage is more
than 1V in a short time, then it goes to 0V
Check voltage of pin 1 (PWR) in P605 at Replace POWER PCB ASSY
Main PCB
0V
Check whether all 4 Pins in P619L and
P621L at Main PCB are short
Contact badness of P619L, P621L CONNECTOR
Replace CONNECTOR
- 27 -
No "Power On"
(Timer on/off and the main power lamp
flickering in red and orange alternately)
OK
Remove lamp and then fix it again Check normal operation
Check output voltage of P804(POWER)
Replace Power PCB
(380V / 18V)
Check voltage of pin 1 (Lamp_On) in
Replace Main PCB
P626C at Main PCB
Check voltage of pin 3 (Error) in P626C Replace lamp and then
at Main PCB check mormal operation
Replace LCD ENGINE
Check voltage of pin 3(32PIN) in
P612V at Main PCB
Less than 2V
Replace MAN PCB Replace VIDEO PCB
- 28 -
No "Power On"
(Timer on/off and the main power lamp
lighting in orange)
POWER ON
Check if Engine Fan acts for a moment and stops
(Check if air blows to center ventilation hole on
backside of product)
NO
The voltage is mane
Then DC 5V in a short
Time, then it goes to 0V
Check voltage of pin 7(7V/10V) Check voltage of pin 5 (ID_1)
in P806M at Power PCB in P626C at Main PCB
More than 0.5V
0V
Remove Engine Unit, Check if it's 0V
Replace Power PCB
short between pin 3 (Red wire) in
P922E at interior PCB (1x3cm) in
Eugire and Pin 5 in P626C at main
PCB
SHORT
NO SHORT
Check "Short" between output
voltages at Power PCB and GND
Contact badness
NO YES of Connector
Replace Replace
LCD ENGINE SHORT PCB Check voltage of pin 3 (32Pin) in P612V
at Main PCB
Less than 2V More than 2V
Replace MAIN PCB Replace VIDEO PCB
- 29 -
No "Power On"
(The main power lamp is
not red)
The main power lamp is not red
FUSE CHECK
R895, R896 SHORT CHECK
D803, D806, D830, D831 DIODE CHECK
I804 CHECK (TOP232P)
If DRAIN and SOURCE Impedance value approach
0 ohm, replace I804 because it is broken
I821 CHECK
(POTO COUPLER CHECK)
D836 CHECK
Check always because it's part of feed back
Check if ST5V is correct.
When pressing Power button, check if
The main power lamp is red
END
- 30 -
No "Power on"
(the main power lamp is red.
stand-by Power is on)
SPEC.3.3V, (if it is more than 1.5V:Normal
Check P805M WAFER Power ON/OFF operation), if less than 1.5V:Check path of
MAIN. VIDEO Circuit
Check Q804 Tr, D829 SHORT TEST
Check if POWER CORD is OPEN
Check D801
Check Q803 Check I802 18V Regulator Replace
Check normal voltage Replace 5332 Module END
Check voltage waveform of Q803
END
END
When part is destroyed by lightning and shock, D801, Q803, FUSE is easily damaged
I802 is often destroyed by shock of the primary and the secondary
- 31 -
No Display
(DTV / PC Input)
Does Power LED operate Lamp, Fan,
normally in green? Abnormal Power
When pressing Menu check LVDS of IC225E
button, is OSD displayed? #2,3 #5,6 #8,9 #11,12
Check signal output of DTV of Check output of CLK in IC213
Is `No Signal' displayed? Check Sync Output in IC216
PC and Set Connection
ClK : #3, H_sync : #6, V_sync: #3
Check sync output in IC227 If pressing "recall" key, does
Check CLK output and Sync in IC217
H_sync : #3, V_sync : #6 correct resolution to input signal ?
CLK : IC213 of #2
H_sync : IC216 #5, V_sync : IC216 #2
Check DTV/PC_SEL signal Check R,G,B output of IC227
#9, 10 of IC224 R: #14, G:#15, B:#4 IC216 abnormal
DTV(high), PC(low)
Check H_sync output of IC236 #7 & Check DTV/PC_SEL signal
#9,10,11, of IC230
sync output of IC228 DTV(high), PC (low)
h_sync : #7, V_sync : #3 Check R,G,B output of IC226
R : #35, G : #37, B : #39
1
Check PC input of P211M
Check P211M DTV input H_sync: #29, V_sync : #31
Y : #17, Pb : #19, Pr : #21 R : #23, G : #25, B : #27
Check Y, Pb, Pr, SCP input of P226
Y : #5. Pb : #4, Pr : #3, SCP : #31
Checkconnectionbetween#17,19, Checkconnectionbetween#23,25,27,29,31
21 of P211M and #1(Y), #2(Pb) of P211M and #1,3,5,7,9 of P913M (side
#3(Pr) of J108 jack)
1
END END
- 32 -
No Display
(RF / VIDEO / DVD)
Does Power LED operate normally in green? LAMP, FAN, Power abnormal
When pressing Menu button, is OSD CheckIC217 (PW364) output Check IC220 (LVDS IC) output
displayed normally? (#DPT00~#DPT23) (#LVDS00~#LVDS09)
Repair Engine BOARD
RF signal is off RF, VIDEO Screen is off Only DVD Screen is off
Check connection of antenna Check U101 (1855) output Check IC219 (3230) input
(#19-C, #21-Y, #23-V) (#4-B, #5-G, #6-R)
Check after
Check after
connection
repair Check Input signal
(480i)
Check TU601 (TUNER output) Check U104 (1232) output
(#5-Y/V,#6-C)
Check after IC219 Repair
(#Y0~#Y7, #C0~#C7)
Check after
Check after
connection
connection
Check after Q101 repair (#E)
Check after Q106, Q107 Repair
(#E-C, #E-Y)
Is all Screens not displayed? Is IC219 (3230) output correct?
repair
(RF / VIDEO / DVD) (#Y0~#Y7, #C0~#7)
Check after IC218 (9400) repair
(#VPT00~#VPT20)
- 33 -
No SOUND
Check SOUND MUTE
Check SPEAKER CONNECTOR
Check each input CABLE
Check input signal
RF Check TU101 SIF input Check IC601 (#67) Signal
External Input 1/2/3 Check U101 (#20,22) output Check IC601 (#47,48) Signal
DVD Check P610A (#10,11) path Check IC601 (#50,51) Signal
HDTV Check P610A (#15,16) path Check IC602 (#50,51) Signal
PC Check P613S (#11,13) path Check IC602 (#53,54) Signal
Check IC601 & IC602 output MAIN L/R : IC601(#27,28) CENTER : IC602(#28)
WOOFER : IC601(#30) SURROUND L/R : IC602(#24,25)
HEADPHONE : IC601(#36,37)
AUDIO AMP MAIN N/R INPUT : IC604(#7, 11) OUTPUT : IC604(#2, 4)
Check input/output CENTER/WOOFER INPUT : IC605(#7, 11) OUTPUT : IC604(#2, 4)
SURROUND L/R INPUT : IC606(#7, 11) OUTPUT : IC604(#2, 4)
END
- 34 -
Z86129
(caption/rating)
-35-
108 99 51 50 110 111 132 49 48 47 46 92 93 117 4957800400 CLOTH BLACK 3 0.7T 10X125
116 7122402412 SCREW TAPTITE 4 TRS 4X24 MFZN BK
115 4957904400 DC FAN 1 ADDA AD0512ME-D70
52 114 -------- SHIELD CASE 1 -------------
113 4957700300 CUSHION CASE ENGINE 8 INOAC F-9L T=10
112 VIDEO PCB AS 1
111 POWER PCB AS 1
110 MAIN PCB AS 1
109 A/V PCB AS 1 SPONGE 10T
108 4957701200 CUSHION MIRROR S 2 CR
109 107 DETECT SW AS 1
53 106 CONNECTION PCB 1 40X50
105 CONNECTION PCB 1 40X14
104 4953901900 BRKT SCREEN B 1 AL6063
103 7001401211 SCREW MACHIINE 7 M4 PAN 4X12 MFZN
101 102 4952700050 LCD ENGINE AS 1 DEK-1
101 97P2316600 HOLDER AC CORD 1 NYLON66 UL/CSA
100 4956900300 BUSHING FAN 1 CR
99 4957904600 MIRROR 1 T=5
98 4957700800 CUSHION SOUND B 2 SPONGE 10T
34 35 97 4957700700 CUSHION SOUND T 2 SPONGE 10T
96 CUSHION SOUND L 1 SPONGE 10T
45 95
4957700600
4957700500 CUSHION SOUND R 1 SPONGE 10T
54 131 94 4956900100 RUBBER BUSHING 12 CR
93 7172401412 SCREW TAPTITE 1 TT2 TRS MFZN 4X14 BK
92 97P4602700 CLAMP CORD 1 NYLON 66 BLK 5280N
113 36 37 43 44 91 4952600100 HANDLE CABINET 2 HIPS BK
90 4957700100 CUSHION DUST 1 SPONGE T=40
55 56 97
95 96 38 39 42 89
88
4956000700
7178301212
SCREW WOOD
SCREW TAPTITE
4
8
4X14 MFZN BK
TT2 WAS MFZN 3X12 BK
115 116 98 112 114
87
86
4953903501