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THOMSON TECHNICAL COMMUNICATION
Television
Troubleshooting Flow Chart
TFC-04052
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: Shutdown-Cycles Three Times SYMPTOM: Pulsing Three Times
Apply AC to the unit. Verify Standby Power Supply is operational.
Warning!
To perform the troubleshooting in this flowchart, it will be necessary to defeat a safety circuit (scan loss). Make sure the CRT (s) are disconnected before attempting this procedure. Remember to restore all connections or components to normal condition before returning to the customer.
1
1A
Locate Q14105 (23i) on the main chassis and short between Base and Emitter. Are the Cooling fans operational?
N o
Troubleshoot the Run Power Supply.
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 Shutdown/Cycles Three Times Circuit Level Troubleshooting.
2 Is the high voltage operational?
2A Go to the High Voltage Troubleshooting Flowchart TFC-04049.
No
Yes 3 3A
Unsolder pin 18 of J14102. Press the power button. Is the horizontal drive (12Vpp square wave) at pin 15 of J14102?
No
Go to Horizontal Troubleshooting Flowchart TFC-04050.
Yes 4 4A
Is the 5VDC present at the trace of pin 18 of J14102?
No
Go to Scan Loss Troubleshooting Flowchart TFC-04051
Yes
5
5A
Is there a 40 VPP pulse at pin 7 of J14102?
No
Go to Scan Loss Troubleshooting Flowchart TFC-04051
Yes
Go to System Control Component Level Troubleshooting Flowchart TFC-04056
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.