Sanyo SFX-33 Service Manual page 24

L
L
(7) No dial out
Dial method selection (RAM CODE,
SW No.00) is correct ?
DP
1
DP or TONE ?
Check DP dial circuit (See page (b) below
J
TONE
Check TONE signal circuit (See (a) below)
(a) Tone dial
Does TXLINE (CN31, pin No.17 on M-1)
NO
appear normal ?
i
YES
Do TELI and TEL2 (FC33 pin No.7 and 8)
NO
appear normal ?
Check M-1 (MAIN) PCB
t
YES
I
I
I Check M-4 (TEL) PCB
i
(b) DP dial
Does the DP signal (CN31, pin No.11 on M-3) appear
NO
normal ?
Check M-1 (MAIN) PCB
1
Do TEL1 and TEL2 (FC33 pin No.7 and 8)
NO
appear normal ?
Check M-3 (NCU) PCB
Check M-4 (TEL) PCB
I