Accessory Detection - Nokia RH-41 Series Troubleshooting Instructions

RH-41
Troubleshooting Instructions

Accessory detection

1 Start the phone in the normal mode when checking for accessory detection.
2 The Ad- converter value of the hookint-line can be checked with the Xmic-
switch on an MJS-18 test jig. Changes normally from high to low when no acces-
sory is connected.
3 When the headset (HDC-5) is connected, the hookint- value should be between
600 and 800.
Accessory detection
doesn't work normally
Check Headint ad
value with Phoenix
(no accessory
- Headint ~0 *)
Check R151 and
Check bottom
Page 16
connected
Fail
C160
OK
connector
OK
Change UEM
Figure 6: Fault tree, accessory detection
Nokia Corporation
CCS Technical Documentation
Use XMIC switch on
MJS-18 and check
hookint ad value.
OK
Should go from high
(~1000) to low (~0)
OK
Fail
Check R152, C161,
L160
OK
Check R150, R201,
C104, C106, L162,
OK
L163
* On local or test
mode Headint <400
Confidential Issue 2 09/2003