Normal Blown out
Set volume to maximum. Is there any sound output signal at pin 10 & 14 of IC 301 ?
Check sound output signal from No Yes pin 92 & 93 of IC 2100 and its if there Check related circuit. is sound input connection to
Replace the Fuse.
No signal at pin 2 the speaker Yes
Is the Fuse again blown out? & 21 of IC 301.
No
Check output main unit ? consisting of IC701, IC702,
Does STBY+5V appear at pin 1 P1001 Check the power circuit T701 and its related parts. signal at pin
68, 69 of IC 2100 and its
19
19-1 19-2
No Yes
the power Check 3V output related circuit. circuit at the front from pin 22 of IC unit consisting of 2100 and its IC4702, IC4701, related parts. D4707 and its related parts.
