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THOMSON TECHNICAL COMMUNICATION
Television
Troubleshooting Flow Chart
TFC-04055
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: System Control Circuit Level Troubleshooting SYMPTOM: Dead Set - Pulsing
1
1A
Apply AC to unit, is pin 4 of U13101 on the I/O board 4.8 VDC?
NO
Go to Standby Power supply troubleshooting flowchart T F C - 0 4 0 5 3
YES 2 2A
Press power button, does the green power LED light?
NO
Go to System Control Circuit Level Troubleshooting flowchart TFC-04055
YES 3 3A Go to Systems Control component level troubleshooting flowchart TFC-04056
Does pin 4 of U13101 located on the I/O board go low?
NO
YES
go to 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 System Control Circuit Level Troubleshooting
4
4A
Does Run Power supply start ( do the fans start running?)
NO
Troubleshoot the Run Power supply.
YES 5 5A Go to Systems control component level troubleshooting flowchart TFC-04056
Is there Clock & Data at pins 5, 14, 1 & 12 U13203
NO
YES
Go To Horizontal Troubleshooting flowchart TFC-04050
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.