LG F1200 Service Manual page 52

• Vibrator Operation
- Vibrator is controlled by MIDI Chip (U506)
- When vibrator signal is high, vibrator on LCD module is enabled
• Check Points
- VCC lines of MIDI Chip
- Vibrator signal path
- The connection between the main board and LCD module
- The soldering of components
- The vibrator
• Trouble Shooting Setup
- Connect PIF-UNION Jig to the phone, and Power on
- Enter into Engineering mode
- Go to menu "Baseband ➝ Alert ➝ Vibrator"
• Trouble Shooting Procedure
- Check vibrator signal
- Check soldering of components
- Check Board-to-board connector
- Check vibrator
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4. TROUBLE SHOOTING