Werbung
KODY USZKODZEN
A) Fault information on the screen FO offtime (mis). Blink LED indication 58 (oscilloscope).
Possible fault: Internal RAM fault.
Possible def. unit: IC7720.
B) Fault information on the screen F1, offtime (mis) Blink LED indication M7 (oscilloscope).
Possible fault: 14V operation voltage.
Possible def. units: IC7545, R3581, IC7540, R3580, IC7470 and D6580. C) C) Fault
information on the screen F2 offtime
(mis). Blink LED indication 235 (oscilloscope)
Possible fault: Internal timer fault.
Possible def. unit: IC7720.
D) Fault information on the screen F3, offtime (mis) Blink LED indication 469 (oscilloscope)
Possible fault: Channel selector fault.
Possible def. units: U1000.
E) Fault information on the screen F4 offtime (mis). Blink LED indication 958 (oscilloscope)
Possible fault: EE prom faults.
Possible def. unit: IC7770.
F) Fault information on the screen F5, offtime (mis) Blink LED indication 827 (oscilloscope)
Possible fault: Stereo decoder.
Possible def. unit: IC7220.
The fault information only appears when the appliance functions.
G) Fault information on the screen F6 offtime (mis). Blink LED indication 606 (oscilloscope)
Possible fault: Audio servo amplifier.
Possible def. unit: IC7770.
H) Fault information on the screen F7, offtime (mis) Blink LED indication 164 (oscilloscope)
Possible fault: TXT decoder.
Possible def. unit: IC7800, IC7820.
The fault information only appears when the appliance functions. If the picture is missing the
off-time of the display LEDs
can be checked using an oscilloscope to determine what fault has been produced.
The fault only occurs when the appliance functions. After turning off the mains switch the fault
is no longer indicated but it is
still present.
Werbung
