Misc Failures - Samsung OfficeServ 12 Service Manual

3.5 MISC Failures

Failure 1
When the internal MOH or BGM(Background Music) does not work.
Troubleshooting 1
Check if the shunt pin(p421) is located
at 'INT' position
Is the shunt pin normal?
Yes
Does the music
signal supply to the QSLAC
(U452)?
Yes
Scope the C423
(input of the QSLAC(U452))
Is music signal supply to
the QSLAC(U452)?
Yes
Check if the 8
is normal
Yes
Check if signals(2M, FSX, DCLK, HVO)
of the QSLAC(U452).
Are signals normal?
Yes
Replace the Base board
END
© SAMSUNG Electronics Co., Ltd.
No
No
No
No
th
SLI port
No
Change the shunt pin
Replace the Music IC
Replace the U424
Replace the QSLAC(U452)
Replace the engine
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