CONFIDENTIAL
8 (17)
RAE-3 Repairhints
Customer Care Europe & Africa Version 2.0 Approved
SCCE Training Group 13.03.2002
© 2002 Nokia Mobile Phones
Checked by:
Customer Care Training Group
Approved by:
SCCE
PDA display dark
CCFT Lamp and Piezo unit faulty
- If the PDA starts up (startup logo is seen), but the illumation is off, probably the piezo is broken or the backlight circuit is
faulty.
- Check Piezo_in frequency around 135kHz (Vpp = 10 VAC) at L151 and Feedback frequency around 135kHz (Vpp = 2.7 VAC)
at R158. (See picture below)
Piezo_in Feedback
- If Feedback frequency is around 0Hz or Piezo_in frequency is around 100kHz, change CCFT (See SB-014), because the piezo
is broken (see pictures below)
- If changing the CCFT, do not forget to paste the damper (9480703) on the CCFT Lamp and Piezo unit to prevent noises and
damages. (See picture below)
- If the fault persits, probably the UL2 module can also be faulty. (Refer to Service Manual/ Troubleshooting/ BL8 related PDA
UI problems
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