Service manual

- 2-7 -
IC501 Troubleshooting
IC501 16PIN power applied check
IC501 2, 3 PIN CLK Data check
CONTROL function check
normal
Refer to IC301 Troubleshooting
Refer to power supply check
IC501 replace Pattern check between IC301 and IC501
IC301 13, 14 PIN data check
(When switched to CD, TAPE Function)
IC601(TDA7468D) Troubleshooting
IC601 1PIN power applied check
IC601 7,22 Pin waveform output check
IC601 8,21Pin waveform input check
IC601 12,17Pin waveform output check
normal
IC601 15,14 Pulse waveform check
(with tunning VOL DIAL)
Refer to power supply check
IC301 15, 16, 66, 67, 68, 69 Pin check
IC601 replacement
MICOM(82,83) - IC401(21,22) Pattern checkIC601 replace
IC301 Troubleshooting
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES