Samsung TB-331VDZ1S, TB-501VDZ1S, TW531VCZ1S, TB-531VCT1X, TW331VDZ1S Troubleshooting
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Troubleshooting
Samsung Electronics 6-1
6. Troubleshooting
6-1 No Power (No LED on)
Yes
Check
both terminal voltages
of C819 (125V)
Check both
terminal voltages of
C807 (140~150V).
Check D801~804
F801,Q801.
No
Is Q801 Pin 9
6~8V?
Check IC801, Q803
Check/Replace
T801.
No
Yes
No
Yes
Check
Voltage of 5V, 6V, 8V,
13V power line..
Check whether
each power line
is short or open.
No
No
Yes
Is IC901
Pin 64 Voltage 5V?
Check H.V SYNC on
IC901 Pins 1, 2
Check/Replace
IC901.
Check
IC901 Pin 3 is High
when power is On.
Check/Replace
IC902.
Check the voltage
of TU01.
Yes
Yes
No
No
Yes
6-2 No Power (No Picture On)
Troubleshooting
6-2 Samsung Electronics
Check CN102
Check IC901 #64
No
Check IC901 #23, #24
Check after Bus
Line Open
Yes
Check Q803~Q807.
Yes
Yes
Yes
Check IC804
No
Check another I2C
Bus Line.
Yes
No
No
Retouch CN102 or
Replace CN102
Check IC801
Check Q801
Check D801~D805
Check/Replace
D801~D805
Replace
Replace
Replace
Yes
No
No
No
No
Check IC901 #28~31
Replace
IC901
No
6-3 No RF Sound (Picture Ok)
Troubleshooting
Samsung Electronics 6-3
Check IC901 #23, #24
Check D831 "H" and
Q805~Q807
Yes
Yes
Yes
No
Check Another I2C
bus line
Check IC806, IC811
Check IC201 #12, #37
Check Q401, Q402
Replace
Replace
Replace
Replace
No
No
No
Check After
bus line open
No
Replace
No
Yes
No
Check
IC201 #40, #41,
R416, R408, R408,
D401, D402
Yes
Yes
Troubleshooting
6-4 Samsung Electronics
6-4 No Picture (Sound OK)
1 Check the Brightness, Contrast and Color adjustments
2. Check: AV Picture, Video Playback
3. See Video Block Diagram
6-5 No Sound (Picture OK)
1. Check the Volume adjustment level.
2. Check AV Video, Sound Playback
3. See Audio Block Diagram
6-6 RF Weak Signal (Playback, AV Mode OK)
1. Check Tuner (TU001) B+. Check: 12V (IC807)
33V (DZ803). Check 5V (IC802)
2. Pre AMP (HC001), B+. Check: 9V (IC803)
SPLITTER (SP001) B+. Check: 5V (IC803, ICU101)
6-7 Recording Defect
1. CN101 Check : Retouch
2. 2nd Tuner (TU002) B+. Check : 12V (IC807), 33V(DZ803)
5V (IC803, ICU101)
3. 2nd If : Check 12V (IC807), Video out, Audio out
4. Video Defect : IC701 Check
5. Audio Defect : IC704 Check
6. Standby Recording Defect, IC901 #5 Line: Check (D833, D838, IC808, IC807, IC806)
7. VPS (PDC) Recording Defect: Check IC901, #4
Troubleshooting
Samsung Electronics 6-5
6-8 No Color
1. Check the Color Adjustment level
2. Check the Sandcastle Pulse Line : IC201 #41, IC202 #5, IC203 * #15
3. Check the R-Y, B-Y Line : IC201 #29~#32, IC202 #14, #16, #11, #12, IC203 #9, #10
4. Check IC203 : #15 (SECAM System)
5. Check crystal : X202 (4.43361MHz)
6-9 No Vertical SCAN
1. Check R410, D404
2. Check IC301, #7
3. Check IC201 #46, #47 Line
4. Check DY Connector
6-10 Horizontal Size
1. Check DZ805 & IC801
2. Check Q803
3. Check C402 & C403
6-11 On-Screen Display Missing
1. Check IC901 #2
(D921, Q901, DZ901)
2. Check IC901 #1 (R949, D919)
6-12 No Teletext
1. Check Q203 (IC203* #16)
2. Check the 1st 5V-Line (R842, D817, IC802)
3. Check ICT01 #1 (Vcc(5V) : Teletext Board)
4. Check ICT01 #8 (CVBS : Teletext Board)
5. Check IC201 #26 (TTX F/B)
Troubleshooting
6-6 Samsung Electronics
6-13 Play Mode Inoperative
EE-VIDEO
Yes
Yes
Yes
Play
Indication in
Display
Mechanism
Operation
PB-Video
See (PB Audio)
Audio Missing in
Play Mode
No
Yes
See Video Missing
In EE Mode
No See
(Regulator Inoperative)
No
No
See
(Mechanism Does Not
Operate in Play Mode)
See
Video Missing in
Play Mode
Insert a Cassette
Tape Recorded by
Another VCR and
Press Play Button
Yes
Does Not Operate or
Operates but Stops Soon
Troubleshooting
Samsung Electronics 6-7
6-14 Mechanism Does Not Operate In Play Mode
OK but VCR Stops Soon
Yes
(SW 25Hz)
ICM601-24
Capstan
Rotation
Tape Loading
Operation
No
Replace ICM601
No
No
Check CYL FG.PG
ICM601-38,39
See
(Capstan Does
Not Rotate)
(S.End Sensor)
ICM601-13
Low
Check Tape
(Load)
ICM601-59 : HIGH
ICM601- 58 : LOW
No
Moter B+
ICM603- 2,10
No
Motor B+ Line
Replace ICM601
Replace ICM603
Cylinder
Rotation
No
See
(Cylinder Does
Not Rotate)
High
Yes
Yes
Prog, SW State
ICM601-56,57
No
Deck Loading Motor
Mechanism
S, T Reel
ICM601-84,85
DC
PTM601, PTM602,QM602, QM603
Supply/Take Up Reel Sensor
PTM601, PTM602
Yes
Mechanism Does Not
Operate In Play Mode
Place VCR
Power On
Load a Tape and
Press Play Button
Yes
Yes or VCR Stops Soon
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