Samsung TW15X53X, TW14N63X, TW21B3N3X, TX14N3F3X-SEC, TW15X53X-BWT Troubleshooting
Troubleshooting
Samsung Electronics 6-1
6. Troubleshooting
6-1 No Power (No Picture on)
Check
both terminal voltages
of C820 (125V)
No
Check both
terminal voltages of
C807 (280~300V).
Yes
Is Q801 Pin 3
19~22V?
Yes
Check/Replace
T801.
No
Check D801~804
F801,Q801.
No
Check IC801
No
Check whether
each power line
is short or open.
No
No
Check/Replace
IC901.
Yes
Check
Voltage of 5V, 6V, 8V,
13V power line..
Yes
Is IC901
Pin 64 Voltage 5V?
Yes
Check H.V SYNC on
IC901 Pins 1, 2
Yes
No
Check/Replace
IC902.
Check
IC901 Pin 3 is High
when power is On.
Yes
Check the voltage
of TU001.
6-2 No Power (No LED On)
Troubleshooting
6-2 Samsung Electronics
Check IC901 #64
Yes
Check IC901 #23, #24
Check after Bus
Line Open
No
Yes
Check CN102
No
Check IC804
No
Check another I2C
Bus Line.
Retouch CN102 or
Replace CN102
No
Yes
Check IC801
Yes
Check Q801
No
Replace
No
Check IC901 #28~31
No
Replace
IC901
Replace
Yes
Check D801~D805
Yes
No
Check/Replace
D801~D805
6-3 No RF Picture / Sound
Troubleshooting
Samsung Electronics 6-3
Check IC901 #23, #24
Yes
Check D834 "H" and
IC807
Yes
Check IC201 #12, #37
Yes
Check Q401, Q402
Yes
No
Check Another I2C
No
Replace
No
Replace
No
No
bus line
Check After
bus line open
Yes
Check
IC201 #40, #41,
R416, R408, R409,
D401, D402
No
Replace
Replace
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 (TU01S) B+. Check: 9V (IC807)
33V (DZ803). Check 5V (IC902S)
2. Pre AMP (HC001S), B+. Check: 9V (IC807)
6-7 Recording Defect
1. CN101 Check : Retouch
2. 2nd Tuner (TU02S) B+. Check : 33V(DZ803)
5V (IC808)
3. 2nd If : Check 9V (IC806), Video out, Audio out
4. Video Defect : IC701 Check
5. Audio Defect : IC701 Check
6. Standby Recording Defect, IC901S #5 Line: Check (D834, IC804, IC807, IC806)
7. VPS (PDC) Recording Defect: Check IC901S, #4
Troubleshooting
Samsung Electronics 6-5
6-8 No Color
1. Check the Color Adjustment level
2. Check the Sandcastle Pulse Line : IC201S #41
3. Check the R-Y, B-Y Line : IC201S #29~#32
4. Check crystal : X202 (4.43361MHz)
6-9 No Vertical SCAN
1. Check R410, D404
2. Check IC301, #7
3. Check IC201S #46, #47 Line
4. Check DY Connector
6-10 Horizontal Size
1. Check C402 , C403 , L401 , L404
6-11 On-Screen Display Missing
1. Check IC901S #2
(D905, Q901, DZ901)
2. Check IC901S #37 (R949, IC903)
Troubleshooting
6-6 Samsung Electronics
6-12 Play Mode Inoperative
EE-VIDEO
Yes
Insert a Cassette
Tape Recorded by
Another VCR and
Press Play Button
Yes
Play
Indication in
Display
Yes
Mechanism
Operation
No
No See
No
See Video Missing
In EE Mode
(Regulator Inoperative)
See
(Mechanism Does Not
Operate in Play Mode)
Yes
PB-Video
Yes
See (PB Audio)
Audio Missing in
Play Mode
Does Not Operate or
Operates but Stops Soon
No
See
Video Missing in
Play Mode
Troubleshooting
Samsung Electronics 6-7
6-13 Mechanism Does Not Operate In Play Mode
Mechanism Does Not
Operate In Play Mode
Place VCR
Power On
Load a Tape and
Press Play Button
Yes
Tape Loading
Operation
Yes or VCR Stops Soon
(S.End Sensor)
ICM601-77,76
High
No
ICM601-38 : HIGH
ICM601-39 : LOW
Replace ICM601
Low
(Load)
No
Check Tape
Moter B+
ICM602- 2,10
Replace ICM602
No
Motor B+ Line
Cylinder
Rotation
OK but VCR Stops Soon
(SW 25Hz)
ICM601-24
Yes
Capstan
Rotation
Yes
S, T Reel
ICM601-99,98
Yes
Prog, SW State
ICM601-63,64,65
No
No
No
DC
No
See
(Cylinder Does
Not Rotate)
Check CYL FG.
ICM601-93
See
(Capstan Does
Not Rotate)
PTM601, PTM602,
Supply/Take Up Reel Sensor
PTM601, PTM602
Deck Loading Motor
Mechanism
Yes
Replace ICM601
Troubleshooting
6-8 Samsung Electronics
6-14 Record Mode Inoperative
Play
Operation
Yes
Load VCR With a Blank
Tape and Press Record Button
Yes
Tape Eject
Yes
D/ REC (H)
ICM601-66
High
No
No
Rec SW Logic
Replace SWM602
Low
ICM601
See (Play Mode
Inoperative)
No
Check ICM601
Change Tape Replace
REC-Video
Yes
See (Audio Mising in
Record Mode)
No
See
(Video Missing in
Record Mode)
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