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Troubleshooting
5. Troubleshooting
5-1 No Power (No Picture on)
No
Check both terminal voltages of
C805 (280~300V).
Yes
No
Check D801S~804S
FD801S
Is IC801S Pin 3
19~22V?
Yes
Check/Replace
T801S
No
Check IC801S
/Zener diode
Check both terminal voltages of C813 (125V)
Yes
No
Check
Voltage of A5V,A3.3V,
A15V power line.
Check whether each power line is short or open.
No
Yes
Is IC201S
Pin 54 Voltage 3.3V?
No
Yes
Check
H.V SYNC on
IC201S Pins 33, 21, 22
Check/Replace
IC901.
No
Yes
Check
IC201S Pin 11 is High when power is On.
Check/Replace
IC902.
Yes
Check the voltage of TU001.
Samsung Electronics 5-1
Troubleshooting
5-2 No RF Picture / Sound
Check
IC201S #40, #24
Yes
Yes
Check
IC201S R, G, B, pins 51, 52, 53
No
No
Check Another I 2 C bus line
Replace IC201S
Yes
Check Q401, Q402
No
Replace
Yes
Check FBT
No
Replace
No
Check After bus line open
5-2 Samsung Electronics
5-3 No Picture (Sound OK)
1 Check the Brightness, Contrast and Color adjustments
2. Check: AV Picture, Video Playback
3. See Video Block Diagram
5-4 No Sound (Picture OK)
1. Check the Volume adjustment level.
2. Check AV Video, Sound Playback
3. See Audio Block Diagram
5-5 RF Weak Signal (Playback, AV Mode OK)
1. Check Tuner (TU01S) B+. Check : 9V, 33V, 5V (CN802A)
5-6 Recording Defect
1. CN802A Check : Retouch
2. 2nd Tuner (TU02S) B+. Check : 33V(LT02)
5V (JTV501)
3. 2nd If : Check 5V (ICT01), Video out, Audio out
4. Video Defect : IC701 Check
5. Audio Defect : IC701 Check
6. Standby Recording Defect, ICM601 #42 Line:
7. VPS (PDC) Recording Defect: Check ICP01, #5, #27, #24, #2
Samsung Electronics
Troubleshooting
5-3
Troubleshooting
5-7 No Color
1. Check the Color Adjustment level
2. Check the Sandcastle Pulse Line : IC201S #34
3. Check the R-Y, B-Y Line : IC201S #51~#53
5-8 No Vertical SCAN
1. Check L301, L302, C310
2. Check IC301, #2
3. Check IC201S #21, #22
4. Check DY Connector
5-9 Horizontal Size
1. Check LR401S, L402, CR402S
5-4 Samsung Electronics
5-10 Play Mode Inoperative
RF-VIDEO
Yes
Insert a Cassette
Tape Recorded by
Another VCR and
Press Play Button
Yes
Play
Indication in
Display
Yes
No
No
Mechanism
Operation
No
Yes
Does Not Operate or
Operates but Stops Soon
No
PB-Video
Yes
See (PB Audio)
Audio Missing in
Play Mode
See Video Missing
In RF Mode
See
(Regulator Inoperative)
See
(Mechanism Does Not
Operate in Play Mode)
See
Video Missing in
Play Mode
Troubleshooting
Samsung Electronics 5-5
Troubleshooting
5-11 Mechanism Does Not Operate In Play Mode
Mechanism Does Not
Operate In Play Mode
Place VCR
Power On
5-6
Capstan
Rotation
Yes
S, T Reel
ICM601-99,98
Yes
Prog, SW State
ICM601-63,64,65
Yes
Replace ICM601
Load a Tape and
Press Play Button
Yes
Tape Loading
Operation
No
(Load)
ICM601-38 : HIGH
ICM601-39 : LOW
No
Yes or VCR Stops Soon
Replace ICM601
(S.End Sensor)
ICM601-77,76
High
Low
Cylinder
Rotation
OK but VCR Stops Soon
No
(SW 25Hz)
ICM601-24
Yes
No
Check Tape
See
(Cylinder Does
Not Rotate)
Check CYL FG.
ICM601-93
Moter B+
ICM602-3, 9, 21
Replace ICM602
No
See
(Capstan Does
Not Rotate)
DC
No
PTM601, PTM602,
Supply/Take Up Reel Sensor
PTM601, PTM602
Deck Loading Motor
Mechanism
No
Motor B+ Line
Samsung Electronics
5-12 Record Mode Inoperative
Play
Operation
Yes
Load VCR With a Blank
Tape and Press Record Button
Yes
Tape Eject
No
No
Rec SW Logic
ICM601
See (Play Mode
Inoperative)
No
Change Tape Replace
Yes
Replace SWM611
Low
Check ICM601
D/ REC (H)
ICM601-66
High
No
See
(Video Missing in
Record Mode)
REC-Video
Yes
See (Audio Mising in
Record Mode)
Troubleshooting
Samsung Electronics 5-7
Troubleshooting
5-13 Fast Forward Mode Inoperative
Load VCR With a Tape and Press F.Fwd Button
Yes
Mechanism
State ICM601-63,
64,65
(F.FWD)
Capstan Motor
Rotation
(Rotate)
Check Mechanism
(STOP)
(STOP)
See
(Mechanism Does Not
Operate In Play Mode)
See
(Capstan Does
Not Rotate)
5-8 Samsung Electronics
5-14 Rewind Mode Inoperative
Load VCR With a Tape
(Rotate)
Press Rewind Button
Yes
Mechanism
State ICM601-63,
64,65
(Rew)
Capstan Motor
Rotation
(Rotate)
Check Mechanism
No
(STOP)
(STOP)
See (Fast Forward Mode
Inoperative)
See
(Mechanism Does Not
Operate In Play Mode)
See ICM601-25
Troubleshooting
Samsung Electronics 5-9
Troubleshooting
5-15 Rev Search Mode Inoperative
Play
Operation
Yes
No See Play Mode
Inoperative
Press REV Search Button
Yes
Capstan Speed
Play Speed
Check Mechanism
Serach Speed
Noise Bar Locking
Yes
No
Rec SW Logic
ICM601
Yes
Replace ICM601 Capstan Motor
No
Replace ICM601
Change Tape Replace
5-10 Samsung Electronics
5-16 Cassette Loading Mechanism Does Not Operate
Turn the VCR Power
On and Insert a Tape
Tape Loading
Yes
Press Eject Button
No
Check ICM601
No
Check
(Control Pulse)
ICM601-76,77
Yes
ICM601 - 39
Yes
ICM602-12:LOW
ICM602-11:HIGH
No
No
No
Check Start/End
Sensor ICM601
Check
LM B+ Line
Replace
ICM602
Troubleshooting
Samsung Electronics 5-11
Troubleshooting
5-17 No Servo Lock
Play
C-FG
ICM601-93
Yes
No
CTL Pluse
ICM601-4
Yes
Check CTL
Pulse AC Level (SP, LP
: Over 2Vp-p)
Yes
Replace
ICM601
No
No
Check Start/End
Sensor ICM601
Check
A/C Head
5-12 Samsung Electronics
5-18 Capstan Does Not Rotate
9V
CNM603-5
Yes
AL 5V
CNM603-8
Yes
Place the VCR
In Play Mode
Yes
CNM603-3 2.5V
Yes
2.5V
CNM603-4
Yes
Check
Capstan Motor
No
No
No
No
Check 12V at AL15V Line of
Power Supply
Check A5V at AL6V
Line of Power Supply
Check I-LIMIT.
RM618
Check C.M CTL/
RM606, RM604
No Check
ICM601
Troubleshooting
Samsung Electronics 5-13
Troubleshooting
5-19 Drum Does Not Rotate
Check 12V
ICM602-9,21
Yes
Place the VCR
In Play Mode
Yes
No
Check 12V
CYL-Speed
Slower
(8 MHz)
XTM601
Yes
Check
Cylinder Motor
Faster Check D-FG,D-PG
ICM601-96,97Square Wave
No Replace
XTM601, CM609, CM610
5-14 Samsung Electronics
5-20 Video Missing In Play Mode
Video EE Mode
Operation
Yes
Place VCR
Play Mode
Yes
Video FM In
ICM301-17
Yes
Video
ICM301-20
Yes
No
No
See (Video Missing
In EE Mode)
Check ICM301-18
No
Check
QM302
No
No Video
ICM301-29
Yes
Check Video Out Line
Replace ICM301
Check
Video Head
Troubleshooting
Samsung Electronics 5-15
Troubleshooting
5-21 Video Missing In Record Mode
Video EE Mode
Operation
Yes
Place VCR
Record Mode
Yes
FM-Video
ICM301-21
Yes
FM-Video
ICM301-18
Yes
No
No
No
TV Switching
Circuit Check
Replace ICM301
Check RM313
Check Video Head
5-16 Samsung Electronics
5-22 Color Missing In Play Mode
FM-ENV
ICM301-61
Yes
Color
ICM301-71
No
See (Video Missing
In Play Mode)
Yes
No
S/W 25Hz
ICM301-11
Yes
Check
XTM301 : 4.43MHz
Yes
No
No
Replace ICM301
Check
ICM601
Change XTM301
No
Troubleshooting
Samsung Electronics 5-17
Troubleshooting
5-23 Color Missing In Record Mode
(VIdeo In)
Record Mode
Yes
Color
ICM301-61
No
Yes
TV Switching
Circuit Check
No Check
XTM301 : 4.43MHz
Yes
No
Replace XTM301
Replace ICM301
FM Signal
ICM301-71
Yes
Replace ICM301
No
Check CM351
5-18 Samsung Electronics
5-24 Audio Signal Missing in Play Mode (MONO MODE)
Check ICM301 pin75 : 5V
Yes
Check
ICM301 pin23,24
(IC CLK DATA)
Yes
Check ICM301 pin 1 : PB Audio Signal
(Small Signal)
Yes
Check ICM301
pin100 : PB audio signal
(Small Signal)
Yes
Check ICM301
pin96 : PB Audio
Signal
Yes
Check
TV NICAM PART(Sound Block)
No
No
No
No
No
Check PC 5V Line
Check VCR MICOM
(ICM601- pin27, 28)
Check A/C Head and PB EQ
Block (AUDIO HEAD AZIMUTH)
Check CM301
Replace ICM301
Troubleshooting
Samsung Electronics 5-19
Troubleshooting
5-25 Audio Signal Missing After Recording (MONO MODE)
Check
IC702 #14
MONO out
Yes
Place VCR in REC Mode
Yes
Check
ICM301 pin 75:
5V
Yes
Check
ICM301 pin7 REC audio signal
Yes
Check
FLM501 Pin5 REC bias signal
Yes
Check
CNM302 , Pin5
Yes
Replace CNM302
No
No
No
No
No
Check IC702
Check PC 5V Line
Replace ICM301
Check CM370, RM357, RM358
CM371, CM373, CM372,
QM312, RM359
Check A/C
Head Assembly
5-20 Samsung Electronics
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