Service manual

Section I: Imagesetter
Diagnostics 3-69
Figure 3-2 Vacuum system troubleshooting flowchart.
Turn Vacuum ON
No
Yes
Is
Vacuum Pump
ON
No
Problem
Check
Volt Sensing Relay
Adjustment
Is
Vacuum Pump
ON
No
Check
Vacuum Pump
Fuse
Is
Vacuum Pump
ON
No
Check
AC
going into Pump
Is
Voltage
OK
No
Check
AC
Going into SSR
Replace
Vacuum Pump
Yes
Yes
Vacuum System
Fixed
Vacuum System
Fixed
Is
Voltage
OK
No
Check
Input
Side of SSR
Is
Voltage
OK
No
Check
DEC Signal/
Replace Vac. Mod.
Replace
Solid State Relay
Yes
Yes
Check
Output
of Transformer
Is
Voltage
OK
No
Yes
Check
Wiring/Replace
Volt Sensing Relay
Check
Input
of Transformer
Is
Voltage
OK
No
Yes
Replace
Transformer
Check Wiring to
the Input
of Transformer
END
A
A
2
3
5
7
6
1
8
9
11
10
12
13
14
15
#
= Step Number in Troubleshooting Guide
Yes