Sharp GX15, Service Manual

Page: 57 / 122

GX15
2 – 49
CONFIDENTIAL
4. Battery does not charge.
5. Vibrator does not work.
Set a battery of 4.0 - 4.2 V. Click the “Performance check
adjustment” button on SPST.
* For settings and connections for SPST, refer to the “ADJUSTMENTS,
PERFORMANCE CHECK, AND FIRMWARE UPGRADE” on page 2-1.
Click the “Temperature adjustment” button. Is the value of
“temp” normal? (Measurement tolerance:
±
5 deg.)
TH102 and IC103 are defective.
Click the “Battery voltage check” button. Is the voltage 4.0 -
4.2 V? IC103 is defective.
Set a battery of 3.7 - 3.9 V and start in normal mode.
Connect the AC charger to the external connector.
Is the voltage applied to TP503 higher than that of battery? R535, R536, Q102, and IC107 are defective.
When the AC charger is inserted to the external connector, is
IC107 pin 1 at “L”? IC107 is defective.
Connect the AC charger to the external connector.
After approx. 15 seconds, do the voltages on TP159 and
TP502, and TP506 increase by more than 0.05 V? R535, R536, Q102, IC107, IC102, Q101, IC103, D101, and
D102 are defective.
The battery is defective, or the battery cycle is shortened.
Are vibrator terminals in contact with the land?
Are terminals and the land clean? Vibrator is deformed and defective. (When vibrator terminals
and the land are dirty, clean or replace them.)
Hereafter check with vibrator working.
Is rectangular wave of 3 V sent to between vibrator terminals
in sync with the vibration pattern?
Vibrator is defective.
Is VBAT voltage applied to IC108 pin 4? IC108 is soldered improperly.
Is signal synchronised with the vibration pattern sent to IC108
pin 3? IC108 is defective.
Is signal synchronised with the vibration pattern sent from
IC101 pin 19? IC101 is soldered improperly.
Do ring tones sound from earpiece (for loud speaker)? Go to the section “Earpiece (for loud speaker) does not work”.
(see page 2-50)
IC101 is defective.
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
NO
NO
YES
YES
NO
YES
NO
NO
YES