Loop test
Input terminal Output
terminal
Path
gain [dB]
(fixed)
Input
voltag
e
[mVp-
p]
Different
ial
output
voltage
[mVp-p]
Outpu
t DC
level
[V]
Outp
ut
curre
nt
[mA]
External Mic to Internal
Earpiece
XMICP and GND
EarP and GND -4.5
1000
600
1.2
NA
EarN and GND
XMICN and GND
EarP and GND
EarN and GND
External Mic to Internal
handsfree
XMICP and GND
B2102 pads
-5
1000
560
0
25m
A
(calc
.)
XMICN and GND
B2102 pads
Internal Mic to External
Earpiece
B2100 (OUT/
GND)
HSEAR R P,
HSEAR R N
and GND
22.7
100
1360
1.2
NA
HSEAR P,
HSEAR N and
GND
HSEAR R P,
HSEAR R N
and GND
HSEAR P,
HSEAR N and
GND
RM-42
Nokia Customer Care
BB Troubleshooting and Manual Tuning Guide
Page 6–40
Company Confidential
9241872 (Issue 1)
Copyright ©2005 Nokia. All Rights Reserved.