Xerox 5915 Service Manual page 140

9-8
U2-1 LAMP CARRIAGE FAIL - STANDBY
Lamp carriage fails to activate optical registration sensor for 6.5 sec during standby.
U2-2 LAMP CARRIAGE FAIL - POSITION
Case 1: Optical registration sensor fails to turn on within 0.65 sec at lamp carriage initialization after end of copying.
Case 2: Optical registration sensor fails to turn off within 0.65 sec at start of copy.
U2-3 LAMPCARRIAGE FAIL-SCAN
Optical registration sensor fails to turn on within 0.46 sec after lamp carriage initiated scanning.
U2-4 LAMP CARRIAGE FAIL - RETURN
Optical registration sensor fails to turn on within 2.5 sec after lamp carriage initiated return.
U3-1 LENS POSITION FAIL
Lens sensor fails to turn on within 3.1 sec after lens initialization was initiated (start of movement).
U8-1 EXPOSURE CONTROL FAIL
Control mode is not set within 0.5 sec after exposure lamp turned on.
U8-4
EXPOSURE VOLTAGE OVER FAIL
Voltage level of exposure signal intensity level already exceeds 2.9 V when exposure lamp turns on.
U8-5 EXPOSURE VOLTAGE UNDER FAIL
Voltage level of exposure signal intensity level is already below 0.5 V when exposure lamp turns on.
Test
data Signal name
No.
EXPOSURE LAMP
1
TERMINAL VOLTAGE
EXPOSURE LAMP
2
STARTING SINGNAL
LAMP VOLTAGE MONITOR
3 Enter diag code [6-7] and then [6-8] to check A/D value
SIGNAL
LAMP CARRIAGE MOTOR
4
ON 24V CLOCK
Measurement
Measurement method
point
P/J16-1 ⊕ •Enter diag code [6-7]
•Start a copy cycle in normal mode.
P/J16-2
P410-12 ⊕
Enter diag code [6-7] measure
COM
J605-3,4,5,6 ⊕
Enter diag code [6-3] or [6-4] and
measure
COM
Section 9 BSD (Block Schematic Diagram)
Reference value
100VAC
60-70VAC
ON: +10.2VDC
OFF: 22.3VDC
A/D VALUE: B4 to B6
(reference: +19VDC)
ON: +24.0VDC
OFF: +24.5VDC
3.2 OPTICS