6
6
6-18
6-18
Troubleshooting■>■Startup■System■Failure■Diagnosis■>■Flow■B:■Control■Panel■Check■Flow
Troubleshooting■>■Startup■System■Failure■Diagnosis■>■Flow■B:■Control■Panel■Check■Flow
Flow■B:■Control■Panel■Check■Flow
■
●
Control■Panel■Check■Flow
Return the Control Panel
CPU PCB to its original position,
and replace the Main Controller Unit.
The Control Panel CPU
PCB was faulty. End the
flow as the PCB has
already been replaced.
Replace the harness.
Is the operation
sound heard when hard keys
are pressed?
Is the operation
sound heard when the Touch
Panel is pressed?
Remove the Control
Panel CPU PCB.
Replace the
Touch Panel.
Replace the
Numeric Keypad PCB.
Yes
Yes
No
No
Yes
No
Press the Volume key several
times to start work with the
operation sound heard.
Yes
No
Yes
No
Replace the Low-voltage
Power Supply PCB.
(1)
Is 12V supplied to
the Control Panel?
(3)
Is the Control Panel
displayed after replacing the
Control Panel CPU PCB?
Is the operation
sound heard when the Touch
Panel is pressed?
(2)
Is 12V supplied to
the Low-Voltage
Power Suply PCB?
Yes
No
F-6-17
■
●
Check■item
Item
Check■item
Location
(1)
Control■Panel■CPU■
PCB
J1118:■12V
11.95v
(2)
Low-voltage■Power■
Supply■PCB
J314:■12V
11.95v
(3)
Control■Panel■CPU■
PCB
End■the■flow■if■the■display■is■recovered■after■replacing■the■Control■Panel■
CPU■PCB.
If■it■is■not■recovered,■the■cause■is■a■failure■on■the■Main■Controller■side.■
Return■the■Control■Panel■CPU■PCB■to■its■original■position,■and■replace■
the■Main■Controller■Unit.
T-6-12