Troubleshooting Guide - Toshiba 20HLV86 Service Manual

THE PICTURE DOES NOT
APPEAR (1).
DOSE BACK LIGHT SHINE ?
YES
IS CD3807 CONNECTED ?
YES
IS THERE SIGNAL
AT CP7203 ?
NO
IS THERE SIGNAL
AT IC7201 ?
YES
CHECK IC801.
OR CHANGE SCALER PCB.

TROUBLESHOOTING GUIDE

IS THERE VOLTAGE AT
NO
PINS 1, 2, 3, 4 AND 5
OF CP3807 24V ?
NO
CONNECT CD3807.
YES
NO
E-2
NO
YES
CHECK IC3801, T3801 AND
PERIPHERAL CIRCUIT.
CHANGE V2301.
CHANGE IC7201.