Sharp UX-B20 Service Manual page 92

UX-B20U/UX-B20C/B25C
2. Relay board unit
2.1. Relay board unit
1. Remove the LIU, Control PWB and Power Supply PWB from this
unit, and mount the 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.
Extension
cable
12
CNLIU
1
PIN
(YELLOW)
CHECK
CONTROL
PWB
TO
PIN(YELLOW)
EXTENSION
+3.3V(GREEN)
PWB
· The extension cables are used as one pair.
· The hook switch is manually operated.
CHECK
CNLIU
LIU PWB
The hook switch is operated by 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.
PIN EXTENSION CABLE (QCNWG231CSCZZ)
YELLOW
GREEN
8 – 2
Mechanical unit
Actual operation with mechanical unit
Hook SW
ON/OFF operation
PWB sensor check
Hook SW ON-HOOK
PWB to be tested
ON-HOOK
ON/OFF operation
TO
CHECK
CONTROL PWB