Main Keypad; Power Up (Ton01) - Motorola E398 Troubleshooting And Debug Manual

Motorola GmbH, CSS Center Flensburg, Mobile Devices
Title: Troubleshooting-Guide E398
5.6 - Main Keypad - Customer Complaint: MKPxx
1.) If the Main Keypad is not working
check: - the
- for Dry Joints, Solder Shorts, damaged and skewed Parts
- replace missing or damaged Components
2.) If the Main Keypad is still not working
replace:
5.7 - Power Up - Customer Complaint: TON01
1.) If the PCB doesn't start up
check the
replace:
check the
replace:
2.) If the PCB starts Up in Flashmode
replace:
3.) If the PCB doesn't start up
check
replace if suspect
check
replace if suspect
Repair Support Information
Keyboard
- J1401
- J1301
- U1400
- U1401
- S1460
- SW1400
- SW1402
- U1400 (if not effective)
- U1401 (if not effective)
- U800
32kHz at Y900
- Y900 (if not effective)
- U900
26MHz at Y805
- Y805 (if not effective)
- U800
- U700 (current drain ~ 1,5mA)
VBOOST (5,6V) at L922, L921,
VBUCK (1,9V) at L920, CR920, R920,
Doc. No:
Version:
Date:
Page:
CR921 and U900
C927 and U900
© Copyright 2003-2005 Motorola Inc. All Rights reserved.
Motorola internal use
TSG_E398
0.9c
17.06.2005
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