Table of Contents
Advertisement
Service & Analysis Center Europe
SACE AMS Training Group
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.
Repairhints_nse5_002508
CONFIDENTIAL
NSE-5
Repairhints
30.07.2000
Checked by:
AMS TRAINING GROUP
10 (30)
Version 1.0 Approved
Approved by:
SACE
Advertisement
Table of Contents
