4.6 Vibrator Trouble. LG KG291, KG290

4. TROUBLE SHOOTING

4.6 Vibrator Trouble

TEST POINT

Q300

D301

CIRCUIT

VIBRATOR

Figure 13

VBAT

MOTOR

VIBRATOR

R351

1K

When the vibrator works, the VIBRATOR signal at this point goes High

D301

1SS302-T5L_F_H

R350

20

2

3

1

Q300

KTC4075E

Current

Flow

LGE Internal Use Only - 72 Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

4. TROUBLE SHOOTING

Checking Flow

SETTING : Enter the engineering mode, and set vibrator on at vibration of BB test menu

START

Check Vibrator contact

Is the voltage at pin 1 of Q300 near

0V?

Yes

Check the soldering of vibrator at upper board

Yes

Replace Vibrator

No

Check Q300 or replace it

No

Resolder vibrator

Vibrator will work properly

Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

- 73 LGE Internal Use Only