Xerox 5915, Service Manual

Page: 145 / 146

9-13 5.3 XEROXGRAPHICS, COPY TRANSPORTATION AND FUSING
Section 9 BSD (Block Schematic Diagram)
Test
data
No.
Signal name
Measurement
Point
Measurement
method
Reference value
1 ZERO CROSS SIGNAL
J410-9
⊕
COM
Measure in standby
mode.
(close front cover)
+0.5VDC
2
ERASE LAMP ON(L)
+24VDC
J403-5
⊕
COM
Enter diag code
[4-1] and measure. ON: +0.75VDC
OFF: +12.5VDC
3
PHOTO MODE ON(L)
+24VDC
J407-14
⊕
COM
Select Photo mode
during standby and
start a copy cycle. ON: 0V
OFF: +13VDC-14VDC
(Auto and variable modes)
4 CC&TC ON(L) +24VDC
J407-13
⊕
COM
Start a copy cycle in
normal mode. ON: 0V
OFF: +13VDC-14VDC
5
DEVE BIAS ON(L)
+5VDC
J407-16
⊕
COM
Enter diag. code
[9-2] and start a copy
cycle.
ON: 0V
OFF: +13VDC-14VDC
6
DTC&DEVE BIAS
ON(L) +24VDC
J407-15
⊕
COM
Start a copy cycle in
normal mode. ON: 0V
OFF: +13VDC-14VDC
7
FUSER THERMISTOR
SENSED SIGNAL
Enter diag code [6-18] and check A/D
value. A/D VALUE:
9C to 93
8
FUSER THERMISTOR
discontinuation check
Enter diag code [6-19] and check A/D
value.
A/D VALUE:
Normal: 00 to 01
Discontinuous: FF