Nokia RM-579 Service Manual page 71

RM-578; RM-579
BB Troubleshooting and Manual Tuning Guide
Loop test
External Mic to
External Earpiece
External Mic to
Internal Earpiece
External Mic to
Internal
handsfree
Internal Mic to
External Earpiece
Issue 3
Input Output
terminal terminal
XMICP and HSEAR R P,
GND HSEAR R N
and GND
HSEAR P,
HSEAR N
and GND
XMICN and HSEAR R P,
GND HSEAR R N
and GND
HSEAR P,
HSEAR N
and GND
XMICP and EarP and
GND GND
EarN and
GND
XMICN and EarP and
GND GND
EarN and
GND
XMICP and B2101 pads
GND
XMICN and B2101 pads
GND
B2150 HSEAR R P,
(OUT/GND) HSEAR R N
and GND
HSEAR P,
HSEAR N
and GND
COMPANY CONFIDENTIAL
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Path Input
gain [dB] voltage
(fixed) [mVp-p]
-2.9 1000
-4.5 1000
-5 1000
22.7 100
Differential Output
output DC level
voltage [V]
[mVp-p]
720 1.2
600 1.2
560 0
1360 1.2
Output
current
[mA]
NA
NA
25mA
(calc.)
NA
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