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