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RAP 2.61 Elevator Book at Top Sen-
sor
Elevator I/O PWB Input 8
The book at top sensor (Figure 2-94) is a retro-
reflective sensor that detects books on the top
shelf of the Elevator. It is used for both push-
outs and jam detection. Reflectors are mounted
in square indents on the Elevator shelves be-
neath the sensor.
Possible Fault Indicators
"Elevator JAM, Book on Top"
message is displayed when there is no
jam.
The sensor does not detect when a
book is at the top of the Elevator.
Initial Actions
Check that all cables between the trimmer, Ele-
vator, and Tilt Infeed Conveyor are securely fas-
tened and are not damaged.
Check that all right-hand side Elevator shelves
have reflectors attached. Replace any if neces-
sary (PL 5.31 Elevator 56421TCA (4/7)).
Check and repair loose or damaged wires 48,
73, and 74 at the Elevator electrical panel.
Procedure
1. Switch the main power ON and go to the El-
evator diagnostic screen (GP 6.2 Input/Out-
put Diagnostics). Make sure that the sensor
is not obstructed. Is input "Book On Top"
off?
Y
N
Disconnect wire 48. On the diagnostic
screen does input "Book On Top" switch off?
CMT-130TC Book Trimmer
Y
N
Disconnect power and replace the Ele-
vator I/O PWB (REP 4.26 Accessory
PWB Replacement).
Check for shorted or disconnected wires
within the Elevator.
Adjust the sensor (GP 6.6 Retro-reflective
Sensors) and replace if faulty (PL 5.29 Ele-
vator 56421TCA (2/7) or PL 5.37 Elev. Elec-
trical Panel EE-3523).
2. Short wire 48 to 74. On the diagnostic
screen does input "Book On Top" switch on?
Y
N
Disconnect power and replace the Elevator
I/O PWB (REP 4.26 Accessory PWB Re-
placement).
3. Adjust the sensor (GP 6.6 Retro-reflective
Sensors) and replace if faulty (PL 5.29 Ele-
vator 56421TCA (2/7) or PL 5.37 Elev. Elec-
trical Panel EE-3523).
Figure 2-94. Elevator Book at Top Sensor
MAY 2019
2-69
Figure 2-95. Elevator Electrical Panel
2. Status Indicator RAPs
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