Diagnosis - Panasonic CF-07 Service Manual

11 Diagnosis

1. MAIN UNIT DIAGNOSIS (1/2)
Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
No. Symptom
1
No power is sent to the
unit.
(when using AC)
No power is sent to the
unit, (When using the
Battery Pack)
2
Power cuts off during
operation.
2. MAIN UNIT DIAGNOSIS (2/2)
Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
No. Symptom
1
When a device is selected
for HDD, the system boots
from a different device.
Troubleshooting
procedures
No.
Is 15V applied to pins 2 of
1-1
Q807? (Whichever one)?
Is 15V applied to pins 8 of
1-2
Q805?
Is 15V applied to pins 2 of
1-3
Q805?
Before setting the power
switch to ON, check voltage
1-4
on either side of SW1. Is
Voltage 3.3V?
1-5 Final Means
Is 8~12V applied to pins 5~8
1-6
of Q855, 856?
(Whichever one)
Check soldered parts of
2-1
R840, 842, 854 and R855.
Troubleshooting
procedures
No.
Are there system files in the
1-1
device selected?
Does the unit operate
1-2 normally after replacing the
problem device.
14-1
Source of
problem
Result
YES Go to No. 1-4
NO Go to No. 1-2
YES Go to No. 1-4
NO Go to No. 1-3
YES Go to No. 1-4
If resistance
across LA800
NO terminals is not
lower than 1
If lower than 1
If voltage is 0V
during the power
YES switch is set to
ON, go to No. 1-5
If not 0V
If voltage of
NO C825 is 3.3V
If lower than 3V
Main PCB
YES Go to No. 1-4
NO Main PCB
If they show
NO soldered
completely
YES
Source of
problem
Result
YES Go to No. 1-2
NO Improper setting
Device for which
YES the problem
occurred
NO Main PCB
Component
LA800
F800
SW1
R854
R855
IC801
IC801
Q844
R840, R842
R854, R855
IC801
Component
IC11