Nokia N72

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-180
BB Troubleshooting and Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 6 –59
Copyright © 2006 Nokia. All rights reserved.