Caller Id Failures - Samsung OfficeServ 12 Service Manual

3.6 Caller ID Failures

Failure
When Caller ID does not send and receive.
Troubleshooting
Check if the MMCs are set normally
Are MMCs normal?
Yes
Check if the signals of the U151 are
normal.(8 M pin32, INT_8MS: pin64,
HAS: pin13, MRW: pin129, MRD: pin127,
CS_DSP: 17)
Are signals normal?
Yes
Replace LV51
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END
No
Repair MMC
Check CPLD
No
(Complex Programmable Logic
Device)(U51) version
14