Accessory Fault - Nokia NPL-3 Series Troubleshooting Instructions

NPL-3
Troubleshooting Instructions

Accessory Fault

Start
Is accessory detected
No
when connected to
system connector?
Yes
End
Page 44
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Figure 42: Accessory troubleshooting
Check system
connector X101
No
(solder ings, contact
plates). Is it OK?
Yes
Measure ACI-line
(pin3). No
Is it ~0.83...1.13V?
Yes
Measure VOUT
No
voltage (pin4).
Is it ~2.8V?
Yes
Retest
Measure ACI-line
(pin3). No
Is it ~0V?
Yes
Measure VOUT
No
voltage (pin4).
Is it ~0V?
Yes
Retest
ãNokia Corporation.
CCS Technical Documentation
Repair solderings or check contact
plates if dirty. Retest.
ACI-Accessory
Check ACI- line (L106,R103,R102,R109,C103).
If not OK, change defect part and retest.
Check VOUT-line (N100, L107, R103, C101,
C102, C112).
If not OK, change defect part and retest.
Non-ACI Accessory
Check ACI- line (L106,R103,R102,R109,C103).
If not OK, change defect part and retest.
Check that regulator N100 enable-pin is
LOW-state.
If not OK, check ACI-line again
Issue 1 3/03