Nokia 7110 - Navigating Menus and Basic Functions

CONFIDENTIAL 10 (30)
NSE-5
Service & Analysis Center Europe Repairhints Version 1.0 Approved
SACE AMS Training Group 30.07.2000
Repairhints_nse5_002508 Checked by:
AMS TRAINING GROUP
Approved by:
SACE
Battery connector X101, X102
- Check solderings of X101, X102.
- Check if connectors are bend or soiled.
Power on/off switch faulty
- Check that PWRON at R413 decreases to 0V during pressing the powerswitch.
- Check display connector X400, change display assy if necessary.
B100 problems
- Check voltage at B100, both Pins 1,6VDC.
- Check 32,768kHz sinewave signal level at C104.( 700mVpp).
- Check parts around B100 like R117, R118, R121, R135, C103, C104, C149.
- Check 32,768kHz squarewave at J318 (3,3Vpp).
G701 Reference oscillator faulty
- Check Vcc 2,8V at G701.
- Check Vcont ( may vary between 1 and 3.5V ).
- note that it is necessary to change G701 if frequency error is higher than 50Hz.
N100 CCONT faulty
- Check Vb 3,6Vat C134.
- Check that PWRON decreases to 0V at R413 when powerswitch is pressed.
- Check 32,768kHz squarewave at J318.
- Check 13MHz Clk-frequency at R301.
- Check Vbb 2,8V at C139.
- Check Vxo 2,8V at C112.
- Check Vref 1,5V at C140.
- Check PURX 2,8V at R147.
- Probably broken solderings under CCONT. Try to tinplate the oxidized pads careful with only a little bit
of flux and solder.
D300 MAD faulty
- Check 32,768kHz squarewave at J318.
- Check 13MHz Clk-frequency at R301.
- Check Vbb 2,8V at C139.
- Check PURX 2,8V at R147.
- MAD is probably faulty, swap the phone because MAD is not changeable.