Loop test
Input
terminal
Output
terminal
Path
gain [dB]
(fixed)
Input
voltage
[mVp-p]
Differential
output
voltage
[mVp-p]
Output
DC level
[V]
Output
current
[mA]
External Mic to
External Earpiece
XMICP and
GND
HSEAR R P,
HSEAR R N
and GND
-2.9
1000
720
1.2
NA
HSEAR P,
HSEAR N
and GND
XMICN and
GND
HSEAR R P,
HSEAR R N
and GND
HSEAR P,
HSEAR N
and GND
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
25mA
(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-495; RM-496
BB Troubleshooting and Manual Tuning Guide
Page 3 –28
COMPANY CONFIDENTIAL
Issue 1
Copyright © 2008 Nokia. All rights reserved.
