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4 Troubleshooting
4-5 No SOUND (GH15MS)
Does the DC 12V appear
No
at Pin 15, 16 of IC401 and
Check Q403, Q401 and related circuit.
Pin 5, 6, 7, 8 of Q403?
Yes
No
Does the sound input signal
Check CN401
appear at Pin 4 and 9 of IC401?
and related circuit.
Yes
No
Does the sound signal appear at
Check IC401 and related circuit.
Pin 14 and 17 of IC401?
Yes
Check CN402 outputs.
GH15LS/GH15ES/GH15MS
4-5