Sharp FO-77 Service Manual page 77

2. Description
2-1. Relay board unit
1. Remove the TEL/LIU PWB, control PWB and Power Supply PWB
from this unit, and mount the relay board unit instead.
•
Before connecting the wiring to the relay board unit, set the test
PWB switches to the fixed position.
2. The setting is as follows.
Relay
cable
1
CNLIUA
12
CNPW
CHECK
CONTROL
PWB
NOTE
UNIT
+24V(C17(+side))
DG(DG1)
TO
PESNS
EXTENSION
PSNS
PWB
Not used
Not used
The relay cables are used as one pair.
The cover swich and hook switch are manually operated.
TEL/LIU
CNLIUA
PWB
CN2
POWER
SUPPLY
PWB
DON'T SEPARATE
RELAY CABLE
SENSOR RELAY CABLE (QCNW-4969SCZZ)
WHITE
BLACK
BROWN
RED
ORANGE
YELLOW
The recording paper sensor (PI1) and the hook switch are operated by
OR of the mechanical unit switch and the test PWB switch. When
performing installation in the machine unit, set the test PWB switches to
the fixed position.
Actual operation with mechanical unit
Recording paper
ON/OFF operation
sensor
Hook SW
ON/OFF operation
PWB sensor check
Recording paper
OFF
sensor
Hook SW ON-HOOK
* Recording paper: ON
No recording paper: OFF
CHECK
CONTROL
PWB
8 – 2
Mechanical unit PWB to be tested
OFF (Photo interrupter
is interrupted.)
ON-HOOK
ON/OFF operation
ON/OFF operation
TEL/LIU
PWB
POWER
SUPPLY
PWB
TO
CHECK
PWB
FO-77U
UX-66U