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THOMSON TECHNICAL COMMUNICATION
Television
Troubleshooting Flow Chart
TFC-04053
The information contained herein is provided solely to assist qualified Technician in the diagnosis of the problem described. It is not intended as a modification or alteration of the product.
REVISION DATE: Chassis: CTC211 9/23/2004
TOPIC: Standby Power Supply Troubleshooting SYMPTOM: Dead Set
1
1A Suspect CR14611, CR14602 and R14602. Also check R14604, Q14602, Q14601, R14602, CR14613 and CR14615
Is 14601 shorted?
Y e s
No 2 2A
Unsolder the drain of Q14601. Check the gate. Is it at 12Vdc?
Y e s
Suspect Q14601
No 3 3A
Unsolder the gate of Q14601. Check the voltage on the trace of the gate. Is it at 12Vdc?
Y e s
Suspect Q14601 or R14604
No Page 2
Product Safety Information
Product Safety information is contained in the appropriate Thomson Service Data covering models/chassis referenced herein. All specified Product Safety requirements and testing shall be complied with prior to returning equipment to the customer. Servicers who defeat safety features or fail to perform safety checks may be liable for any resulting damages and may expose themselves and others to possible injury.
First Edition First Printing Copyright 2003 Thomson multimedia Inc. Printed in U.S.A. Trademark(s) ® Registered Marca(s) Registrada(s)
Page 1 of 2
THOMSON INC.
CTC211 Standby Power Supply Troubleshooting
4
4A
Unsolder the collector of Q14603. Did the gate trace of Q14601come up to 12Vdc?
Yes
Suspect Q14603
No
5
5A
Unsolder the Emitter of Q14602. Did the gate trace of Q14601 come up to 12Vdc?
Yes
Suspect Q14602
No 6
Remove R14602 and CR14613 and check them.
Product Safety Information
Product Safety information is contained in the appropriate Thomson Service Data covering models/chassis referenced herein. All specified Product Safety requirements and testing shall be complied with prior to returning equipment to the customer. Servicers who defeat safety features or fail to perform safety checks may be liable for any resulting damages and may expose themselves and others to possible injury.
First Edition First Printing Copyright 2003 Thomson multimedia Inc. Printed in U.S.A. Trademark(s) ® Registered Marca(s) Registrada(s)
Page 2 of 2
THOMSON INC.