Toshiba SD-22VB 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 11 of IC701?
YES
Is there audio signal at
pin 15, 18 of IC701?
YES
At recording and play, is
there signal at pin 7, 8
and 9 of CP101?
YES
Check IC101.
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.