Samsung CL21B501HL User manual

SERVICE
Manual
COLOR TELEVISION
Chassis: KSCB(N)_CB5H
Model : CL21B501HLMXZS
COLOR TELEVISION CONTENTS
1. Precaution
2. Product Specification
3. Disassembly & Reassembly
4. Troubleshooting
5. Exploded View & Part List
6. Wiring Diagram
7. Schematic Diagram
Refer to the service manual in the GSPN (see the rear cover) for the more information.
CL21B501HL

Troubleshooting
Samsung Electronics 4-7
4-1-3 Troubleshooting Procedures by ASS’Y
1 NO Power
- Power part of the Main Board Check.
Is the power cord or the master
switch out of order?
Complete
Yes
Yes
Yes
Check the FUSE “FP801S” Check the “D801S” #1 Check the IC801S #1
W6753F
No Picture & No Sound
Change “FP801S” Change “D801S” Change “IC801S”
Check the others part
Yes Yes
No No
D809C
F801A
SMPS-TR
BRIDGEDIODE
SOUND IC
FD801S

Troubleshooting
4-8 Samsung Electronics
2. No Sound
- when the power is normal
Checkthe+14Vline
Complete
Yes
Check FD801S Check D809C Change IC601
No sound (1st power OK)
Check IC201 Pin#39.40
Yes Yes
No
Change FD801S Change D809C
No
No
MICOM SMD IC
D809C
SOUND IC
FD801S

Troubleshooting
Samsung Electronics 4-9
3. No Picture
- when the power is normall
Checkthe+125Vline
Complete
Yes
“D811”
open and check
T444B+Pin#3
Open and check CHECKCRTASS`Y
No picture (1st power OK)
Check D407
Yes Yes
No
Change the “D811” Checkthe“Q401”
No
No
ChecktheothersB+line
Yes
Changethe“Q401” Change D407
No
No
Yes
D811MAINTRANS FBT D407 OUTPUT
TRQ401

Troubleshooting
4-10 Samsung Electronics
4-1-4 Troubleshooting by Blocks
1. Tuner Diagnosis
 IfthereisnosignalmeasuredeventhoughtheRFsignalreceivedbytheexternalantennaisinputtotheMainBoardTuner.
- Supplied Power: 5V, 8V, 33V
- RFTroubleCheck:CheckCVBSoutput
- AUDIO Trouble Check: Check SiF Signal output
B+5V
B+33V IF

Troubleshooting
Samsung Electronics 4-11
2.ExternalInputDiagnosis
Component inputs and one monitor output (Video, Audio) are supported.
The signal is input to UOC TOP IC through the ports.
If the signal input change “and output are” to “is” not detected, check the following.
- Supplied Power: UOC TOP IC(5V, 3.3V, 8V)
- Input Problem Check: Check the connecting jacks.
VIDEO IN AUDIO IN VIDEO IN AUDIO IN

Troubleshooting
4-12 Samsung Electronics
3. TDA11136H/N3 Diagnosis
 IF+MICOM+VIDEO

Troubleshooting
Samsung Electronics 4-13
4. LA42032 Diagnosis
- Supplied Power: 11V
- InputProblemCheck:L/R
- OutputProblemCheck:L+,L-,R+,R