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(b) Reading Circuit (To be checked by Scanning test)
Check the connection
of CN6 (M-1) and CN61 (M-6).
I
OK
Check the connection
of CN63 and CNCIS (CIS).
YES
Does VIDEO (CN6, pin No. 10) appear normally?
1
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?
I
YES
Check CIS.
F
(6)
Can not enter the TxJRx. mode by
pressing @TART] switch under OFF-HOOK condition
(a) In case of the extension telephone connected to the SFX-30
Check the connection of extension telephone and MJ42 (M-4).
I
YES
ls/HS (CN31, pin No. 8) low on the NCU PCB (M-3)?
Check the NCU (M-3).
/
YES
Check the M-1 PCB.
(b) In case of the Built-in telephone
Check the connection of CN31 (M-3) and CN3 (M-l).
I
OK
Check the connection of MJ43 (M-4) and handset.
I
I
OK
NO
I
I
ls/DHS (CN41, pin No. 7 on M-4) low?
Check the M-4 PCB.
&
—18—
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