Fender CYBER-TWIN Service Manual page 11

NO
Audio
YES NO
Check Check
Jewel LED Power Supplies
Troubleshoot
Power Supplies
(0055766000)
NO
Audio on
P1B Pin7&8
Host PCB
(0055736000)
NO YES
Troubleshoot
Pre-Amp Section P1B Pin1&2
on Main PCB
(0055766000) (0055736000)
Troubleshoot
Distortion
Section on
Main PCB
(0055766000)
NO AUDIO
Power Switch
Jewel LED VFD
On YES YES On
Audio Amp
YES
OK
NO
Speakers Plugged In
(Remove any plugs
from the rear panel)
YES
Power Supplies
OK
NO
YES
Audio on
Effects Send
NO YES
Audio on Audio on
U7 Pin1 P3B Pin7&8
Main PCB Analog I/O PCB
(0056333000)
YES NO
Swap
Analog I/O PCB
(0056333000)
Audio on Swap
Host PCB
NO
Host PCB (0055736000)
YES
NO
Audio
YES NO
Check Power Supplies
VFD OK
NO NO
Plug In Troubleshoot
Speakers Power Supplies
YES
Swap
Host PCB
(0055736000)
YES
Audio on
P2B Pin1&3 NO
Host PCB
Host PCB
(0055736000)
(0055736000)
YES
Troubleshoot
Power Amp
Section on
Main PCB
(0055766000)
YES
Ribbon Cables
OK
NO
Swap
Ribbon Cables
Swap