Toshiba SD-V392SU Service Manual page 90

Hi-Fi AUDIO
CAN NOT RECORD
Does E-E AUDIO appear?
YES
AT state of video recording,
is there audio signal at
pin 10 and 15 of IC701?
YES
Is there audio signal at
pin 53, 57 of IC701?
YES
At recording and play,is
there signal at pin 7, 8
and 9 of CP101?
YES
Check IC701.
TROUBLESHOOTING GUIDE
NO
NO
NO
NO
E-28
Refer to section "E-E AUDIO
(MONO) DOES NOT APPEAR".
Check circuit around of J602,
J603 and TU301.
Change IC701.
Check CYLINDER UNIT.