Nokia RH-18 - Phone Is Dead

RH-18/36/38 Company confidential
CCS Technical Documentation
Page 6 Nokia Corporation. Issue 1 10/03
Phone is dead
This means that the phone do not draw any current at all when supply is connected and/
or powerkey is pressed.
It is assumed that the voltage supplied is 3.6 VDC. The UEM will prevent any functional-
ity what so ever at battery/supply levels below 2.9 VDC.
Figure 1: Phone is dead troubleshooting
Phone is dead
X105
VBAT = 3,6VDC
No
Yes
Check :
L260,L261,L262,L263,L264,L265
C260,C261,C262,C263,C264,C265
Check :
X105
Yes
No
J402
PURX = 1,8VDC,
1 sec. after power-key
is pressed
L260,L261,L262,L263,L264,L265
C260,C261,C262,C263,C264,C265
Voltage = 3,6VDC
R426
26 MHz clock min. 300mVACpp,
probe Cin=10-13 pF/10M
C227
VR3 = 2,78VDC
J404
Sleep-clock is
32.768 kHz, 1,8Vpp
Check :
C227, PWB.
Else defective D200*
Check :
PWB.
Else defective D200*
Check :
B200, C209, C210, PWB. Else
defective D200*
No
Yes
No
Yes
No
Yes
Yes
Check :
C227, PWB.
Else defective D200*
Yes
No
Check :
D450 (Flash).
Else defective D200*