Toshiba HD-XA1KN Service Manual page 15

3-12. Power Circuit Troubleshooting
RTC backup voltage
Power Measuring
point
R3V TP113
EVER system voltage
Power unit output
Power Measuring
point
PS5VSB TP159
EVER system voltage
M/B REG output, etc.
Power Measuring
point
M5V TP115
M3V TP114
MM5V TP135
MS5V C842-2PIN
Power unit ON/OFF control signal check
PS_ON(Pin 1 of PJ12)
Power system voltage
Power unit output
Power Measuring
points
PS12VDC TP160
PS5VDC TP165
PS3VDC TP164
Output voltage Output voltage
range range
(AC OFF) (AC ON)
2.0-3.0V 3.4-3.0V
Yes
Output voltage
range
5.5-6.5V
Yes
Output voltage
range
4.75-5.25V
3.13-3.47V
4.5-5.0V
4.75-5.25V
Yes
"L"
Output voltage
range
11.4-12.6V
4.75-5.25V
3.13-3.47V
Yes
To (B)
No
Incorrect voltage at
AC OFF
Battery (BT1)
error
No No
No
"H"
No
To (C)
Incorrect voltage
at AC ON
Failure of harness
and/or power unit