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THOMSON TECHNICAL COMMUNICATION
Television
Troubleshooting Flow Chart
TFC-04001
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: 1/22/2004 Model(s): ATC221 TOPIC: SYMPTOM: No Audio
No audio Note: Connectors are located on the DRI board. Tune set to a active channel.Make sure it is set up for internal speakers in audio menu.
1. Is there audio signal at BT983/ 982 pin 1 ? YES
1A. Make sure ext/int switch is in int position.Check speakers
NO 2A. Is there a 22 v p-p audio signal at BT980 pins 1 and 4 ? YES Suspect DRI board.
2.
NO Continue 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)
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THOMSON INC.
Continue from page 1
3. Is there +15 vdc at pins 5 and 6 of BA010 and -15 vdc at pins 1 and 2 of BA010
3A.
NO
Check power supply
YES 4.
Suspect SSB
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.