Toshiba TW40F80 - Manual (Page 33)

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14-5. No Indication On Screen
14-4. Memory Circuit Check
NG
NG
OK
OK
OK
No indication on screen.
Check of RESET at 5V.
Check of CLK, CS, BUSY, DATA at
pin 22, 23, 24, 25 of QA01.
"H" = 5V or puls?
Check of character signal at pin 59, 60, 61
of QR60 (5V(p-p)).
Check V/C/D circuit.
Replace QA01 or QR60 or QR63.
Replace QA01 or QR60.
Replace QR60.
NG
NG
NG
OK
OK
Memory circuit check
Voltage check at pin 8 of QA02 (5V).
Pulse input at pins 5 and 6 of QA02
in memorizing operation.
Replace QA02.
Adjust items of TV set adjustment.
Note: Use replacement parts for QA02.
Check power circuit.
Check QA01.