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(7) No Dial out
Is the position of the Dial selection
switch (SW2 (DP/ PB)) on M-1 PCB?
I
I
1
I
OK
t
Which can not be dialed, DP or Tone?
Is the position of the DP selection
memorv switch (1O/20PPS) correct?
1
I
I
.
I
*=
Check the Tone related clrcut
Check the DP generation circuit.
(a)
In case of the TONE dialing
NG
Does the TXLINE (CN3, pin
No. 17 on M-1) appear normally?
Check the M-1 PCB.
I
OK
NG
Do the TEL1 and TEL2 (CN33,
pin No. 7 and 8) appear normally?
Check the NCU PCB (M-3).
1
OK
I Check the TEL PCB (M-4).
I
(b) in case of the DP dialing
NG
Does the DP (CN31, pin
No. 11 on M-3) appear normally?
Check the
M-1 PCB.
1
OK
NG
Do the TEL1 and TEL? (CN33,
pin No. 7 and 8) appear normally?
Check the NCU PCB (M-3).
I
OK
I Check the TEL PCB (M-4).
—19—
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