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(b) Reading Circuit (To be checked by Scanning test)
Check
the connection
of CN6 (M-1) and CN61
(M-6).
1
OK
I Check the connection
of CN63 and CNCIS (CIS). I
i
OK
YES
Does VIDEO (CN6, pin No. 10) appear normally?
I
YES
NO
Is GLED (CN6, pin No. 2) low?
I
YES
Do the signals (S1(CN6, pin No. 5) and CLK (CN6, pin No. 3)) appear normally?
1
I
YES
(6)
Can not enter the TxJRx. mode by pressing -]
switch under OFF-HOOK condition
(a)
In case of the extension tetephone connected to the SFX-32
Check the connection
of extension telephone and MJ41 (M-4).
I
YES
ls/HS (CN31, pin No. 8) low on the NCU PCB (M-3)?
Check the NCU (M-3).
1
1+
(b)
In case 01 the Built-in telephone
Check the connection
of CN31 (M-3) and CN3 (M-l).
1
OK
Check the connection
of MJ42(M-4)
and handset.
I
.... - ,
.> .,,
i
OK
NO
ls/DHS (CN43, pin No. 7 on M-4) low?
Check the M-4 PCB.
1
YES
Check the M-1 PCB.
—18—
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Table of Contents
Troubleshooting
