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DIGITAL TELEVISION RECEIVER
Chassis : B51A
Model : WS32W6DTS/XEU
COLOR TELEVISION RECEIVER CONTENTS
1. Precautions
2. Reference Information
3. Specifications
4. Disassembly and Reassembly
5. Alignment and Adjustments
6. Troubleshooting
7. Exploded View and Parts List
8. Electrical Parts List
9. Block Diagrams
10. PCB Layout Diagrams
11. Schematic Diagrams
Troubleshooting
6. Troubleshooting
6-1 Analog TV Part
6-1-1 No Power
No Check Stand-by 5V Yes
on the Main Board
Check
No SDA1/SCL1 Yes
on the Micom
Module
Check HD
No Yes
Signal on the Feature
Box Module
Check/Replace
IC201 (TDA4780)
Tuner
Check/Replace MICOM Module
Q804, D824 AUDIO Module Check/Replace
RL802, D805 A/V Terminal Board Q405, D407
IC803, D802 (TDA6920) Q400, Q402
D829 Feature Box Module Replace Q404
on the Power Board Feature-Box Module on the Power Board
Note : If the TV set is damaged by lightening, the following parts are probably destroyed :
R851(2W 27 R-Fusible), IC803 TOP210ES
Samsung Electronics 6-1
Troubleshooting
6-1-2 No Picture
Yes Check IC101 (TDA9810) No
#10 (AGC), #12 (CVBS)
Check Feature
No Box Module M-Y/CVBS, Yes
H SYNC, HS2, Y, SC100 Check/Replace
IC101, Tuner
Replace
Feature Box Module
No Check IC201 (TDA4780) Yes
#14 (SC), #15 (ABL),
#19 (Cut off)
Check/Replace
Replace IC501, IC502, IC503
TDA4780 on the CRT Board.
6-2 Samsung Electronics
Troubleshooting
6-1-3 No Sound
Yes Check IC601, IC602 No
# 5 (MUTE)
No Check Audio Module Yes
MAIN-L, SUR, CENTER,
S-RESET, QSS-IN Check/Replace
Q602, Q603
Micom Module
IC601, IC602
Check/Replace
IC101
Micom Module
No Check IC604 Yes
Audio Module
#9, #14, #15
Check/Replace
Replace
IC604
IC601, IC602
MICOM Module
Samsung Electronics 6-3
Troubleshooting
6-2 Digital TV Part
6-2-1 Functional (diagnostic) test
DTTV Power Off 1
Connect Serial (RS-232C)
cable between DTTV and PC 2
PC Hyperterminal run 3
Port Setting 4
DTTV Power-on
Baud rate : 38400
5 Data bits : 8
Are there Periodic No Parity : None
Status information Stop bits : 1
display Flow control : None
Host Controller Problem
Yes Go to 6-2-4
Enter the SVC mode
Execute Diagnostic 6
(See Note 2)
Channel error GO to 6-2-3
7 DRAM error GO to 6-2-4
No DVBCI error GO to 6-2-4
Is Functional test OK SDRM error GO to 6-2-5
NVRAM error GO to 6-2-4
MPEG error GO to 6-2-5(6)
Yes Modem error GO to 6-2-7
(See Note 1)
Do ACS 8
A/V, OSD OK? 9
Yes
Fix Problem
Problem is Fixed!
No
Problem SVC mode 10 Replace DTTV Modue
Power Off and then Power on 11 No
Note 1. If the functional test is performed with the digital TV set not connected to a telephone line, modem errors will happen.
2. If "shift + }" on your pc keyboard is not entered, about 10 seconds later, the functional test ends and then the TV set
automatically returns to the normal operation.
6-4 Samsung Electronics
Troubleshooting
6-2-2 Explanation of each step
1. If it shows status information periodically on your pc screen, the host controller in DTTV is alive and
you can execute diagnostic (functional) test (6-2-1 !).
2. If it doesn't show any status information periodically host controller had problem(s) and you can't
execute diagnostic (functional) test .
Connect your PC to DTTV with serial (RS-232C) cable (6-2-1 @).
3. The sereal port setting is as follows (6-2-1 $):
-Baud rate 38400
-Data bits 8
-Parity N
-Stop bits 1
-Flow control N
Enter the Factory Mode. Press the remote control key in the following sequence:
PICTURE OFF PICTURE OFF
DISPLAY MENU MUTE
(RED KEY) (RED KEY)
4. Use the channel key and volume keys (up/down) or pointing knob to move the cursor.
Select the digital board.
Press the "volume up" key or move pointing knob to right.
Select the Functional-test.
Press the "volume up" key or move pointing knob to right.
One more Press the "volume up" key or move pointing knob one more to confirm
Press the "shift" and "}(])" keys on your PC keyboard.
Then diagnostic (functional) test will be automatically executed.
The diagnostic results will be shown on your pc screen(6-2-1 ^).
5. You can acknowledge the failed components .
After finishing diagnostic test, DTTV will be automatically reset and enter into normal operation
(6-2-1 &).
6. Then you can quit the service mode by pressing "power off"(RED) on your remote-control (6-2-1 1).
Samsung Electronics 6-5
Troubleshooting
6-2-3 Channel Error (Signal strength is poor), PVB CI Error
Power aerial No Fix the
connection connection
Yes
Check/Replace
Power Check No U102 (5V, + 3.3V)
(3.3V,5V,9V,32V) L703, L704,
BD704, BD706
BD701
Yes
VCXO Check No Check/Replace
(18MHZ) U105
U106 (Pin3:DTP006)
U104 (Pin42:DTP002)
U104 (Pin99:DTP006)
Yes
No Check/Replace
RF Signal Check U101 (Pin35:DTP001)
C110
U104 (Pin157 :DTP001)
Yes
Check/Replace
U104 (51,52,53,56,57
No
Digital Stream Check 57,58)
U108 (50,51,52,53,56
57,58,61)
U201 (53,54,55,56,57
58,59,60,61)
Yes - Digital Data (0V~3.3)
(Figure DTP014)
Ch Part END
6-6 Samsung Electronics
Troubleshooting
6-2-4 NVRAM Error, Controller Error (No A/V, No Status inform)
No Check/Replace
Power Check
BD501, BD503
(3.3V,5V)
BD504, BD702
Yes
No Check/Replace
A/V Data Check U501 (Pins155~165)
- Digital Data
Yes
Check/Replace
No U503 (Pins15, 16, 17)
MPEG Picture Check U505 (Pins37~54)
- Digital Data
Yes
Check/Replace
No U505 (Pins15, 16, 17)
OSD Check U505 (Pins63~82)
- Digital Data
Yes
Check/Replace
No
Subtitle Check U501 (146, 147)
- Digital Data
Yes
Check/Replace
No U506
Video Y,C Check BD507 (DTP020)
BD508 (DTP021)
U501 (Pin116:DTP019)
U501 (Pin117:DTP018)
Samsung Electronics 6-7
Troubleshooting
6-2-5 MPEG Error, SDRM Error (No Video, No OSD)
Power Check No Check/Replace
(3.3V,5V) U303, BD301
BD303, BD702
Yes
Check/Replace
VCXO Check No R300, R336
(27MHZ, 54M) X301 (Pin1:DTP013)
U301 (Pin8:DTP010)
U301 (Pin7:DTP013)
U301 (Pin20:DTP011)
Yes
Check/Replace
No U301 (Pin155:DTP016)
Momory Control Check U301 (Pin156:DTP017)
U309 (Pin5:DTP016)
U309 (Pin6:DTP017)
U301 (Pin149:DTP014)
Yes
Check/Replace
No R309, R332
TV Interface Check U301 (Pin142:DTP035)
U301 (Pin42:DTP034)
Yes
Check/Replace
No U701, (Pins7, 8)
RS232 Interface Check BD703, BD705
U301 (Pins177, 186)
U701 (Pin9:DTP032)
U701 (Pin10:DTP031)
6-8 Samsung Electronics
Troubleshooting
6-2-6 MPEG Error (No Audio)
Check/Replace
Power Check No L703, BD704
(3.3V,5V,9V) BD501, BD503
BD504
Yes
No Check/Replace
A/V Data Check U501 (Pins155~165)
- Digital Data
Yes
No Check/Replace
Audio Data Check U501 (140, 142, 143)
- Digital Data
Yes
Check/Replace
U502 (5, 7, 8, 9)
No - Digital Data
Audio DAC Check R504, R506
(U502) U502 (Pin17:DTP023)
U502 (Pin18:DTP022)
Yes
No Check/Replace
Analog Audio Check U504 (LM358)
(U504) BD505 (DTP024)
BD506 (DTP025)
Samsung Electronics 6-9
Troubleshooting
6-2-7 Modem Error
Power Check No Check/Replace
(5V) BD607, BD701
R607
Yes
No Check/Replace
X-Tal Check
X601, L601
(52.416MHZ)
BD603, R661
- DTP026
Yes
Check/Replace
No U601 (Pin41:DTP029)
CPU Interface Check U601 (Pin40:DTP030)
R631, R636,
R609(3.3V)
Yes
Check/Replace
No U602, U604
Momory Check U601 (Pins43~68)
U601 (Pins1~6)
- Digital Data
Yes
Check/Replace
No U605 (Pin3:DTP027)
Communication Check U605 (Pin5:DTP028)
U601 (Pin7:2V)
U601 (33.2V)
Q601
6-10 Samsung Electronics
Reference Information
2. Reference Information
2-1 Tables of Abbreviations and Acronyms
Table 2-1 Abbreviations
A Ampere MV Megavolt
Ah Ampere-hour MW Megawatt