Is LED on
151xx362 CPU
board flashing?
1. Check that 151xx362 CPU board IC's
U4 and U5 are installed correctly.
2. Replace 151xx362 CPU board.
yes
no
Front Panel Malfunction
Press Reset button on
151xx362 CPU board.
(cont.)
F4
Did Reset LED
on 151xx362
CPU board
momentarily
light?
1. Check connections at J9 of 151xx362
CPU board.
2. Check connections at J4 of 151xx368
Power Supply board.
3. Replace 151xx362 CPU board.
yes
F1
Go to Front Panel Malfunction
page (F1) to repeat checks.
help
no
Is yellow
backlight
visible from
rear of
Touchscreen?
no
yes
1. Check red and black wire
connections on rear of Touchscreen
module.
2. Check connections at J2 of 151xx368
Power Supply board.
3. Replace 151xx368 Power Supply
board.
4. Replace Touchscreen module.
Is DMM
available for
measureing
voltages?
no
1. Check that ribbon cable at J3 of
151xx362 CPU board is secure.
2. Check that ribbon cable at
Touchscreen is secure.
3. Check for damage to this ribbon
cable.
4. Replace Touchscreen module.
5. Replace 151xx362 CPU board.
yes
F5
Go to Front Panel Malfunction
page (F5) to make further
checks on Touchscreen
backlight.
help
Summary of Contents for VC3500
Page 1: ...VC3500 User s Manual Software Version 3 X Manual Number MCO35 Manual Release Date July 1999 ...
Page 19: ...Installation VC3500 User s Manual Valco Cincinnati 16 Figure 8 Internal Connections Diagram ...
Page 88: ...VC3700 User s Manual Software Version 3 X Manual Number MCO34 Manual Release Date July 1999 ...
Page 181: ...VC3500 VC3700 Troubleshooting Manual Manual Number MC048 Release Date May 1999 ...
Page 185: ...VC3500 VC3700 Troubleshooting Manual Valco Cincinnati Page 1 System Level Documents ...