OfficeServ 7100 Service Manual
© SAMSUNG Electronics Co., Ltd.
3-61
3.5.3.3 Abnormal Operation of Some DSPs of the RCM Board
(1)
The method to solve the problem when some DSPs of the RCM board do not operate is as
follows:
If the DSP problem of the RCM board is not solved after performing the above,
see the descriptions of ‘3.5.3.4. Abnormal Operation of Some DSPs of the RCM
Board(2)’ on the next page.
No
Yes
No
Yes
Check the highway for the SENDER.
Check CHIP SELECTION.
(U1 PIN45/46)
Replace U1.
Detect the bad IC in the program
for displaying the MMC 850
system resource.
Check the highway for the
RECEIVER.
Check CHIP SELECTION.
(U1~U3 PIN45/46)
Replace the corresponding IC.
Test the operation(U1~U3) of each IC
via the program for displaying the
MMC 850 system resource.
End
Does the DTMF RECEIVER
operate?
Does the DTMF SENDER
operate?
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