Sanyo SFX-11 Service Manual page 21

(b) Reading Circuit (To be checked by Scanning Test)
----
Check the connection of CN6 (M-1) through CN61 (CIS).
1
I
OK
I
1
YES
Does SIG (CN6, Pin No. 10) appear normally?
[
NO
NO
Is GLED (CN6, Pin No. 1) low?
I
~ YES
i
NO
Do the signals(SH (CN6, Pin No. 6) and CL(CN6, Pin No. 3))
~
Check the M-1 PCB.
appear normally?
Check CIS.
'L.
(6) Can not enter the TxJRx. mode by pressing [STARTl switch under OFF-HOOK condtion
(a) In case of the extension telephone connected to the SFX-11
Check the connection of extension telephone and JK31
(M-3).
1
YES
NO
Is loop (CN32, Pin No. 1) Low on the NCU PCB (M-3)?
Check the NCU (M-3).
I
YES
Check the M-1 PCB.
(b) In case of the Built-in telephone
Check the connection of CN41 (M-4) and CN33 (M-3).
1
OK
Check the connection of CN42 (M-4) and CN34 (M-3).
Check the connection of MJ41 (M-4) and handset
I
OK
NO
Is /DHS (CN41, Pin No. 5 on M-4) low?
Chack the M-4 PCB.
I
1
Check the M-1 PCB.
—19-