Colour Television Service Manual Model CE28HN3F-C Service Ref. No. CE28HN3F-C-00 PRODUCT CODE: 111351314 ORIGINAL VERSION: Chassis HA2A
CE28HN3F-C
Please use Circuit Diagram SKP20368 with this service manual. Give complete "SERVICE REF. NO." for parts order or servicing. It is shown on the rating plate at the cabinet back of the unit.
This T.V. receiver will not work properly in foreign countries where the television transmission system and power source differ from the design specifications. Refer to the specification table. CONTENTS Safety precautions/Specifications ..........................................................................................................2 Block Diagrams..................................................................................................................................3 -9 Cabinet Disassembly ..........................................................................................................................10 Adjustment and Repair Procedures..............................................................................................11 - 15 CPU Functions..............................................................................................................................16 - 17 IC block diagrams ........................................................................................................................18 - 23 Pin description of semi-conductors ......................................................................................................24 Parts description and reading of schematic diagram ..........................................................................25 Cabinet Parts List/TV Stand Parts List ................................................................................................26 Electrical Parts List ........................................................................................................................27- 38
Part No. SKSM0556
C2WSV
JULY 2002
SAFETY PRECAUTION 1: An isolation transformer should be connected in the power line between the receiver and the AC line when a service is performed on the primary of the converter transformer of the set. 2: Comply with all caution and safety-related notes provided on the cabinet back, inside the cabinet, on the chassis or the picture tube. 3: When replacing a chassis in the cabinet, always be certain that all the protective devices are installed properly, such as, control knobs, adjustment covers or shields, barriers, isolation resistor-capacitor networks etc.Before returning any television to the customer, the service technician must be sure that it is completely safe to operate without danger of electrical shock.
X-RADIATION PRECAUTION The primary source of X-RADIATION in the television receiver is the picture tube. The picture tube is specially constructed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube must be the same type as the original including suffix letter. Excessive high voltage may produce potentially hazardous X-RADIATION. To avoid such hazards, the high voltage must be maintained within specified limit. Refer to this service manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified limits, take necessary corrective action. Carefully follow the instructions for +B1 volt power supply adjustment, and high voltage adjustment to maintain the high voltage within the specified limits.
PRODUCT SAFETY NOTICE Product safety should be considered when a component replacement is made in any area of a receiver. Components indicated by mark ! in the parts list and the schematic diagram designate components in which safety can be of special significance. It is particularly recommended that only parts designated on the parts list in this manual be used for component replacement designated by mark ! . No deviations from resistance wattage or voltage ratings may be made for replacement items designated by mark ! .
SPECIFICATIONS Power source Television system Colour system Channel coverage AC 220~240V 50Hz System B/G, D/K, I, L/L' PAL/SECAM/NTSC4.43 on air (NTSC3.58 in AV mode) VHF: E2-E12, F2-F10 UHF: 21-69 CATV: X, Y, Z, S1-S41, B-Q 75ohm AV1: CENELEC Standard with RGB AV2: CENELEC Standard with S-inputs AV3: CENELEC Standard AV4: RCA Terminal, Video and Audio(L/R) Input 10W x 2 28" 736 x 597 x 494mm 32 Kg
Aerial input impedance AV terminal 21-pin terminals
Front AV terminals Sound output (Music) Picture tubes(inches) Dimensions(WxHxD) Weight
[Digital Scan Operation] 100Hz Digital Scan Converter circuit 100Hz converter circuit consists of the following ICs. - TC90A36F, IC7201 Field Progressive Converter - MSM518221A, IC7202, IC7203 Video Memory - TLC2932I, IC7205 PLL (Phase Locked Loop) - MC74HC04AFP, IC7204 invertor The Y-signal output from IC101 is sent to pin 85 of IC7201, field progressive converter, after controlling the amplitude level and band-pass limiting by the circuit consist of Q7301, Q7302, Q7303, Q7304 and 8MHz LPF. The U/V-signal are also controlling the amplitude level and band-pass limiting by the circuit consist of Q7311, Q7312, Q7313, Q7314, Q7321, Q7322, Q7323, Q7324 and 4MHz LPF respectively. The U-signal is sent to pin 90 of IC7201and the V-signal is sent to pin 92 of IC7201. The HD signal is sent to pin 63 of IC7201 with positive polarity through IC7341 for shaping the waveform. The VD-signal is sent to pin68 of IC7201 with negative polarity through IC7341. The Y-signal input to IC7201 is converted from A to D in 8bit and output from pins 18 to 25 of IC7201 to pins 1 to 4 and 24 to 27 of IC7203, video memory, for writing. Digital scan circuit LPF Q7351-Q7354 LPF Q7361-Q7364 LPF Q7371-Q7374
IC7202 Video Memory
6 9 | 31
2Y 2U 2V
98
100
IC7203 Video Memory
IC7201 DOUBLE SCAN CONVERTER 31 | 50
92
LPF Q7321-Q7324 LPF Q7311-Q7314 LPF Q7301-Q7304
V U Y
90
85 53 59 63 68 70 71
IC7204 PLL
9 4
IC7341 Inverter 13 12 11 10
2HD 2VD VD HD
IC7205 PLL
5 4
6 4
5 1
Fig.-6 6 C2WSV
CHASSIS DESCRIPTION
C B A 50Hz A A' B B'
C
100Hz A' = A, B'= B
(a) Normal Scan
(b) Double Scan
Fig.-7
The U/V-signals are converted in progressive at multiplexer and converted from A to D in 8 bit, and then applied from pins 34 to 41 of IC7201 to pins 1 to 40 and 24 to 27 of IC7203 , video memory, for writing. The signals are wrote down to memory IC by 16MHz clock. It means the number of sampling are 1024 per 1H. The clock signal for writing is obtained by performing the phase comparing AFC control to the HD-signal. The phase comparing AFC control performs at IC7205, PLL, and IC7201. The 32MHz clock signal generated here is supplied from pin 3 of IC7205 and sent to pin 61 of IC7201. The clock signal divided to 16MHz in the IC is output to pin 31 and supplied to pins 6 of IC7202 and IC7203. The reading is performed by 32MHz clock supplied from pin 28 of IC7201. In this case, the number of sampling is 2048 per 1H. This read clock signal is obtained by performing the frequency comparing AFC control to the input HD-signal. To avoid the skew distortion, the phase comparing AFC control is not employed. The frequency comparing AFC control is performed at IC7204, PLL, and IC7201. The 32MHz clock signal generated here is output from pin 3 of IC7205 and sent to pins 56 of IC7201 and IC7203. The Y/U/V-signals are converted in progressive as the writing for 16MHz and reading for 32MHz. The progressive Y-signal output from pins 10 to 13 and 15 to 18 of IC7202 is supplied to pins 9 to 16. Also, the progressive U/V-signals output from pins 10 to 13 and 15 to 18 of IC7203 are supplied to pins 43 to 50 of IC7201 and separated with U-signal and V-signal. And then, Y/U/Vsignals are converted in D to A in IC7201 and output to pin 6 as analogue Y-signal, pin 98 as analogue V-signal and pin 100 as analogue V-signal respectively. The HD-signal progressive converted in IC7201 is output from pin 71 of IC7201, the VD-signal progressive converted in IC7202 is output from pin 70 of IC7201. The output HD and VD signals are sent to IC202 with positive polarity through the IC7341 for waveform shaping. The Y-signal output from IC7201 is controlled the amplitude level and band-pass limiting at the circuit consist of Q7351, Q7352, Q7353, Q7354 and 16MHz LPF. The U/V-signals are also controlled the amplitude level and band-pass limiting at the circuit consist of Q7361, Q7362, Q7363, Q7364, Q7371, Q7372, Q7373, Q7374 and 8MHz LPF and these signals are sent to IC201.
5VRC Power Supply Lines Power Failuer Detection Lines
CHASSIS DESCRIPTION
RL649 RELAY SW Q649
Rectifier D3450
POWER ON/OFF ON:HI
C609 D637
CONVERTER TRANS T611
D100 D7381 D651
Power supply & Protection circuit
17 D636
5V Reg IC100
Q613
5V 5V 8V 12V 9V Reg IC1201 D1200 D652
43
8
OSC Control D635 D633 12V Reg IC652 8V Reg IC651
16
7.9V
5V Reg IC7381
POWER ON
+
5
18
30V
5V Reg IC3450
5V
CPU IC801 28 29
15
14
3 D631 D634
T402 FLYBACK TRANS 2 2 1
D610
R641
Q851
Q611
High Voltage Focus Voltage 4 9 1 10
IC631 3 130V Reg
Video Out
200V D491 Q411
Screen Voltage CRT Heater
H-OUTPUT Power Failure detection
D456 D459 D457/D458 High Voltage Detection
POWER FAILURE DETECTION Q852 Q853 D856 D857
10
-15V
15V
HOLD DOWN
9
2
13
D632
35V 130V 9V
11
Fig.-9
C2WSV
DISASSEMBLY CABINET BACK DISASSEMBLY 1. Remove 8 screws (A), 1 screw (B) and 2 screws(C). 2. Pull out the cabinet back.
(A)
(A)
(A)
AV3
AV2
AV1
(B)
(C)
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SERVICE ADJUSTMENTS [After replacing the Menory IC (IC802)] The memory IC, IC802, stores the feature setting data of TV set and service adjustments data for each circuit, therefore, when the memory IC is replaced, you should perform the following "FEATURE SETTING" and "SERVICE ADJUSTMENT".
[FEATURE SETTING] To enter to the Feature Setting Mode + Press and hold the "GREEN" button (Remote control) and Pv button on the TV front control panel. The adjustment window will appear on the screen. + Highlight the FEATURE menu by using the Pv or Pw button and then press the OK button. The window will change to the feature setting window. FEATURE ADJUST Ver 1.0 REGULAR SHAPE FEATURE OTHERS TDA9320 TDA9330 TDA9178 TC90A36 SELECT: OK EXIT : RECALL ON-TIMER ON SORT MODE ATS EURO PLUS PLUG & PLAY ON WELCOME TEXT ON CODE TEST OFF WSS ON Y-SEP OFF Q-SOUND ON AV3/4 AV4 AUTO VOLUME ON ADJUST : EXIT : RECALL
=>
To set the feature mode
Option Settings for CE28HN3F-C-00
+ Highlight the desired feature item by using the Pv or Pw button. + To change the feature mode, use the Volume - (LEFT) or Volume + (RIGHT) button. + The data which is set in the feature mode is stored into the memory IC automatically. Following table shows the available feature items and default setting.
Feature items ON-TIMER SORT MODE
Mode ON or OFF ATS EURO PLUS or AUTO TUNE or AUTO TUNE/SORT
PLUG & PLAY WELCOME TEXT CODE TEST WSS Y-SEP Q-SOUND AV3/4 AUTO VOLUME
ON or OFF ON or OFF OFF or ON OFF or ON OFF or ON ON or OFF AV3 or AV4 ON or OFF
Plug & Play mode,default "ON" Display message when first set up, default "ON" For factory use, default "OFF" Wide Screen Signaling available , default "OFF Y-Separation function available, default "OFF" Active 3D Surround available, default "ON" No. of AV input mode, default "AV4" Auto Volume function available, default "ON"
Exit from the Feature Setting Mode + Press the RECALL ? button on the remote control.
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SERVICE ADJUSTMENTS
[SERVICE ADJUSTMENT] Note: Some items of the service adjustments for this chassis are controlled by the CPU, IC801, these adjustments are carried out by using the RC handset.
IMPORTANT NOTICE Do not attempt to adjust service adjustments not listed in this manual , it may result in loss of performance and product safety. To enter to the Service Mode + Press and hold the "GREEN" button (remote control) and Pv button on TV front control panel. The adjustment window will appear on the screen.
ADJUST Ver 1.0 REGULAR SHAPE FEATURE OTHERS TDA9320 TDA9330 TDA9178 TC90A36 SELECT: OK EXIT : RECALL
To select the mode and service item and change data value + Highlight the desired adjustment mode (REGULAR or SHAPE mode ) by using the Pv or Pw button and then press the OK button. + To select the adjustment item, use the Pv or Pw button. + To change the service data, use the Volume -(LEFT) or Volume + (RIGHT) button. + The data which is set in the service mode is stored into the memory IC automatically.
REGULAR mode
SHAPE mode
STATUS REGULAR 1VC1
38
SHAPE 1.HSF
1F
Adjustment No. and Item name
Adjustment Data
Adjustment Item
Adjustment Data
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SERVICE ADJUSTMENTS
ADJUSTABLE SERVICE ADJUSTMENT IMPORTANT NOTICE Do not attempt to change the data value of service items not listed in the table below otherwise it may cause loss of performance and product safety. If you can not restore the data value of each service item, please initialize the momory IC following to the below description "INITIALIZATION OF MEMORY IC" and re-adjust all of service adjustments. [REGULAR] Item No. 1 2 3 4 5 6 7 8 [SHAPE] Item No. 1 3 4 9 13 OSD 1.HSF 3.EWW 4.EWP 9.VAM 13.VSC Description Horizontal Centre Adjustment Horizontal Width Adjustment Pcc Adjustment Vertical Height Adjustment Vertical Centre Adjustment OSD 1VC1 2VC2 3AGC 4SCR 5GRY 6CUT 7CTR 8OSD Description B/G VCO Adjustment France-L/L' VCO Adjustment AGC Adjustment Screen Adjustment White Balance Adjustment Cut-Off Drive Adjustment Contrast Adjustment OSD Positioning Adjustment
Exit from the Service Mode + Press the RECALL ? button or turn off the TV set by using the Mains switch.
[INITIALIZATION OF MEMORY IC] To initialize the memory IC (IC802), press and hold the "NORMAL" button and then press the Pv button on the front control panel, and then turn the Mains switch Off and On. Now the initialization is completed. When initialized the memory IC, all of the setting data (feature setting data, option data and service adjustment data) stored in the IC are reset to the default value. So it is necessary to set the feature setting, option setting and readjust the service adjustments listed.
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SERVICE ADJUSTMENTS
[ADJUSTMENTS] For how to adjust each service data, Please see "SERVICE ADJUSTMENT on page 12 for Entering the Service mode , Selecting service item and Adjusting the service data value.
IMPORTANT NOTICE Do not attempt to adjust service adjustments except those requiring readjustments in servicing otherwise it may cause loss of performance and product safety. VIDEO LEVEL ADJUSTMENT-2 1. Receive colour bar pattern. 2. Connect oscilloscope to terminal 8 of K73A and GND. Connect oscilloscope to terminal 11 of K73B and GND. 3. Adjust the amplitude of waveforms to be same by using VR7351.
IF VCO ADJUSTMENT PAL BG VCO ADJUSTMENT 1. Apply 38.9MHz signal to IF terminal on the tuner. 2. Set system mode to "S-1". 3. Enter to the service mode (see page 12) and select mode "REGULAR", item "REGULAR 1VC1". 4. Press the LEVEL+ or LEVEL - button to set data value to be "10". 5. Exit the service mode (see page 13). SECAM L/L' VCO ADJUSTMENT (French model Only) 1. Apply 34.3MHz signal to IF terminal on the tuner. 2. Set system mode to "S-4". 3. Enter the service mode (see page 12) and select mode "REGULAR", item "REGULAR 2VC2". 4. Press the LEVEL+ or LEVEL - button to set data value to be "10". 5. Exit the service mode (see page 13). RF-AGC ADJUSTMENT 1. Receive colour bar pattern with 63dBuV/75 terminated signal gain. 2. Connect digital voltmeter to TP-AGC and GND. 3. Set system mode to "S-1". 4. Enter the service mode (see page 12) and select mode "REGULAR", item "REGULAR 3AGC". 5. Press the LEVEL+ or LEVEL - button to adjust voltage to be 3.2Vdc. 6. Exit the service mode (see page 13). VIDEO LEVEL ADJUSTMENT VIDEO LEVEL ADJUSTMENT-1 1. Receive colour bar pattern. 2. Connect oscilloscope to terminal TPVIDEO and GND. 3. Adjust amplitude "a" to be 2.0Vp-p by using VR221.
FOCUS ADJUSTMENT By using FOCUS VR, adjust focus control for well defined scanning lines.
GREY SCALE ADJUSTMENT SCREEN ADJUSTMENT 1. Select AV1 mode with no signal input. 2. Enter the service mode (see page 12) and select mode "REGULAR", item "REGULAR 4SCR". 3. Turn the SCREEN VR to set data value to be "11". GREY SCALE ADJUSTMENT 4. Enter the service mode and select mode "REGULAR", item "REGULAR 4GRY". 5. Adjust [R-Drive] and [B-Drive] control to obtain proper white balance by using LEVEL+ or LEVEL - button. a) Select [R-Drive] or [B-Drive] by using the Pv or Pw button. b) Adjust [R-Drive] or [B-Drive] by using the LEVEL+ or LEVEL - button. 6. Exit the service mode (see page 13).
VERTICAL ADJUSTMENT VERTICAL CENTRING ADJUSTMENT 1. Receive circular pattern.. 2. Enter to the service mode (see page 12) and select mode "SHAPE, item "SHAPE 13.VSC". 3. Press the LEVEL+ or LEVEL - button to adjust vertical centre. 4. Exit the service mode (see page 13). VERTICAL HEIGHT ADJUSTMENT 1. Receive circular pattern . 2. Enter to the service mode (see page 12) and select mode "SHAPE", item "SHAPE 9.VAM". 3. Press the LEVEL+ or LEVEL - button to adjust the vertical height. 4. Exit the service mode (see page 13).
PCC ADJUSTMENT 1. Receive circular pattern. 2. Enter to the service mode (see page 12) and select mode "SHAPE", item "SHAPE 4.EWP". 3. Press the LEVEL+ or LEVEL - button to adjust the vertical line to be straight. 4. Exit the service mode (see page 13).
HIGH-VOLTAGE CONFIRMATION 1. Receive circular pattern. 2. Connect digital volt-meter to both terminals of R442, and high voltage meter to CRT anode. 3. Confirm high voltage to be 27 KV ± 1 KV at beam current 1.4mA, and less than 29 KV at 0 beam current.
HORIZONTAL ADJUSTMENT HORIZONTAL CENTRING ADJUSTMENT 1. Receive circular pattern . 2. Enter to the service mode (see page 12) and select mode "SHAPE", item "SHAPE 1.HSF". 3. Press the LEVEL+ or LEVEL - button to adjust horizontal centre. 4. Exit the service mode (see page 13). HORIZONTAL WIDTH ADJUSTMENT 1. Receive circular pattern. 2. Enter to the service mode (see page 12) and select mode "SHAPE", item "SHAPE 3.EWW". 3. Press the LEVEL+ or LEVEL - button to adjust the horizontal width. 4. Exit the service mode (see page 13).
OSD CENTRING ADJUSTMENT 1. Receive circular pattern. 2. Enter to the service mode (see page 12) and select mode "REGULAR", and select item no. 8 "REGULAR 8 OSD". The OSD test bar will appear on the top of screen. 3. Press the LEVEL+ or LEVEL - button to adjust proper OSD positioning. 4. Exit the service mode (see page 13).
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CPU PORT FUNCTIONS Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Function Name MMU0 MMU3 ADDR10 DSN ADDR11 ADDR9 ADDR8 RWN GND VDD OSC-IN OSC-OUT ADDR13 ADDR14 MMU1 MMU2 MMU4 MMU5 SCART 3 SCART 2 SCART 1 FRONT SC SW SDA SCL RC-IN SERVICE IN SERVICE ACK PROTECT Hold Down 50/60 MUTE SUPER 3D Phone Mute VDD GND IF AGC KEY-IN RF AGC IN NA NA LED-2 NA POWER FB B G R V-SYNC H-SYNC WSCR Function IN/OUT OUT OUT OUT OUT OUT OUT
Address bus 10 Address bus 11 Address bus 9 Address bus 8
Clock Input Clock Output Address bus 13 Address bus 14
IN IN OUT OUT OUT OUT OUT OUT OUT IN IN IN IN IN/OUT OUT IN IN OUT IN IN OUT OUT OUT OUT IN IN IN IN
SCART 3 Input H: AV SCART 2 Input H: AV SCART 1 Input H: AV Front AV Switch Input H : Front IIC SDA IIC SCL Remote Control Signal Input Service Switch Input On: L External Bus Switch Output ACK: L Power Failure Detection Inout L: Failure Hold Down (High Voltage Detection Input) L: Hold Down On 50/60Hz Switch Output 50: H 60: L Sound Mute Output On: H Super 3D Switch Output On: L Phone Mute
IF AGC Input Key Input TV Key RF AGC Input
LED Drive Output Power On/Off Drive H: Power-On BLK Output for OSD Blue Output for OSD Green Output for OSD Red Output for OSD V-Sync Input H-Sync Input
Data bus 3 Data bus 4 Data bus 5 Data bus 6 Data bus 7 Data bus 2 Data bus 1 Data bus 0 Address bus 0 Address bus 1 Address bus 2 Address bus 3 Address bus 4 Address bus 5 Address bus 6 Address bus 7 Address bus 12 Address bus 15
IN IN IN IN IN IN IN IN OUT OUT OUT OUT OUT OUT OUT OUT OUT OUT