Canon FAX-L350, Service Manual

Page: 193 / 213

3-82
FAX-L350 Chapter 3: Maintenance and Service
NCU board (J4)
¬ ®
Power Supply unit (J203)
J4 J203 Signal name Description
1
¬
2 VH For telephone offhook detection during communication
2 — 1 VH-GND Ground
NCU board (J5)
¬ ®
to Grounding wire
J5 G.wire Signal name Description
1 — — ARG Ground (arrester)
NCU board (J7)
¬ ®
Modular board (J230)
J7 J230 Signal name Description
1 — 1 T2 Line from L1, L2 to wall socket via the fax
2 — 2 W Line from handset terminal T11 in priority mode
(handset/extension telephone). Goes into T21 of
the extension telephone.
3 — 3 L2 Telephone line
4 — 4 L1 Telephone line
5 — 5 R Earth signal for PBX
6 — 6 T1 Line from L1, L2 to wall socket via the fax
NCU board (J8)
¬ ®
Modular board (J231)
J8 J231 Signal name Description
1 — 9 A Line from handset terminal T12 in priority mode
(handset/extension telephone). Goes into T22 of
the extension telephone.
2 — 8 W Line from handset terminal T11 in priority mode
(handset/extension telephone). Goes into T21 of
the extension telephone.
3 — 7 T12 Handset terminal telephone line via the fax
4 — 6 T11 Handset terminal telephone line via the fax
5 — 5 R Earth signal for PBX
NCU board (J9)
¬ ®
Modular board (J231)
J9 J231 Signal name Description
1 — 4 W Line from handset terminal T11 in priority mode
(handset/extension telephone). Goes into T21 of
the extension telephone.
2 — 3 T22 Extension telephone terminal telephone line via
the fax.
3 — 2 T21 Extension telephone terminal telephone line via
the fax.
4 — 1 R Earth signal for PBX