OfficeServ 7100 Service Manual
© SAMSUNG Electronics Co., Ltd.
3-41
3.4.7.5 When the Ring Does Not Rise
The method to solve the problem when the ring does not rise in the 8COMBO port as follows:
Yes
Yes
Yes
Yes
No
No
End
No
No
Start
Replace RELAY of the
corresponding port.
Check if the 20 Hz ring
signal is generated from the
NAGATIVE port of D38.
Is the RELAY sound generated?
Is the ring signal generated?
Replace Q58, 59, 60, 69.
- Replace RELEY.
- Replace TR.
Is the ring control port
signal of SBS9401
generated?
Is DC which is
approximately 75 V
output at both ends of
C246, 247?
Replace SBS9401.
- Replace PWM IC(U19).
- Replace Q57.
End
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