Charging; Audio Failures; Fig 5 Fault Tree, Charging - Nokia RH-13 Series Troubleshooting Manual

RH-13
Troubleshooting

Charging

Note: Charging voltage and current can be checked by connecting phone to service
software and reading ad- converter values of vchar and ichar.
Phone doesn't start
charging
Connect charger and
check VCHARIN,
check CHRG_CTRL
if used ACP-9,
LCH-8, LCH-9,
DCH-12, HFU-2
Check ICHAR
FAIL
Check
R202,R203,R205,C217,
C220,C201,C202 and
R200
OK
Change the
UEM

Audio failures

In case of audio failures there are three possibilities to check audio lines.
1 Make a phone call against tester and check audios.
2 In case of earpiece/XMIC fail: Feed 1Khz signal to XMIC line and measure signal
from earpiece line. Audio test box JBA-8 is needed. Audio loop (Audio test/Ext In
Hp Out) must be switched on by Phoenix service software. This loop will connect
audios only through UEM. In this case UPP is not used.
Page 16
Figure 5: Fault tree, charging
Fail
OK
ãNokia Corporation
CCS Technical Documentation
Check
F100,L100,V100,C105
, R107,C107
OK
Check bottom
connector
- VIN
- CHRG_CTRL
Issue 1 11/02