Samsung OFFICESERV 7100 Service Manual page 155

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:
Test the operation(U1~U3) of each IC
via the program for displaying the
MMC 850 system resource.
Does the DTMF SENDER
operate?
Yes
Does the DTMF RECEIVER
operate?
Yes
End
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.
© SAMSUNG Electronics Co., Ltd.
No
Check the highway for the SENDER.
Check CHIP SELECTION.
Detect the bad IC in the program
No
for displaying the MMC 850
system resource.
Check the highway for the
Check CHIP SELECTION.
(U1~U3 PIN45/46)
Replace the corresponding IC.
OfficeServ 7100 Service Manual
(U1 PIN45/46)
Replace U1.
RECEIVER.
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