Diagnosis - Panasonic CF-73ECLTXKM - Toughbook 73 - Pentium M 1.4 GHz Service Manual

9 Diagnosis

9.1 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.
9.2 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 "Boot Up
Drive", the system boots
from a different device.
2 Date or Time cannot be
input.
Date and Time does not
change properly.
Date and Time are not
displayed.
3 Memory count is too large
or too small.
Troubleshooting
procedures
No.
Is 15V applied to pins 1-3 of
1-1
Q710? (Whichever one)?
Is 15V applied to pins 5-8 of
1-2
Q699?
Before setting the power
switch to ON, check voltage
1-3
on either side of SW1000 Is
Voltage 3.3V?
Is 8-12V applied to pins 1 of
1-5
Q681? (Whichever one)
Check soldered parts of
2-1 D666 ～ D668
D463 ～ D468.
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.
2-1 Replace the Main PCB.
3-1 Replace the Main PCB.
15
Source of
problem
Result
YES Go to No.1-3
NO Go to No.1-2
YES Go to No.1-3
NO Go to No.1-2
If voltage is 0V
during the power
switch is set to
YES
ON.
If not 0V
If voltage of C738
NO is 3.3V
If lower than 3V
YES If voltage is 8-12V
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
Main PCB
Main PCB
Component
Q699
SW1000
R705
R706
IC617
Q681
R589
R584, R585
R501 ～R506
IC605, IC606
IC616
Component
IC3
IC3
X2
RTC battery
IC4-11
IC2