Fender Cyber-Twin Service Manual - page 15
Other manuals for Cyber-Twin:
Service Diagram, Instruction Manual
of
42
FX KILL/ FOOTSWITCH IS NOT WORKING
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
See Footswitch Notes on
Digital I/O Board Section
Schematics
(0055766000)
Power
Supply
OK
Voltage on
U26 Pins
4,5,10,11,12
Digital Activity
on U26 Pins 7&15
Troubleshoot
Power Supply
Troubleshoot area
around J3 or J5
Ribbon Cable P4
OK
Digital Activity
on U26 Pin 13
Swap U26
SN74HC166N
Ribbon Cable P4
OK
Swap Ribbon
Cable P4
Ribbon Cable P7
OK
Swap Ribbon
Cable P7
Swap Front Panel
PCB
(0055754000)
Ribbon Cable P7
OK
Swap Ribbon
Cable P7
Swap Front Panel
PCB
(0055754000)
Swap Ribbon
Cable P4