Nokia 6680 RM-36 Service Manual page 437

RM-36
System Module
The HF and HFCM amplifiers include a transient suppression circuitry, which prevents undesired spikes in XEarL
and XEarLC outputs when switching on and off the amplifiers. The HeadInt line is pulled up to 2.7V by the internal
resistor when the accessory is connected. When there is not accessory inserted, the voltage in the HeadInt line
will be <0.8 V caused by internal pull down resistor in the HF line.
Pin #/ Signal Signal
name description
1/ Charge V Charge
2/ GND Charge GND
3/ ACI ACI
4/ Vout DC out
9 / XMIC N Audio in
10 / XMIC P Audio in
11 / HEAR N Audio out
12 / HEAR P Audio out
13 / HEAR R N Audio out
14 / HEAR R P Audio out
Issue 1
Figure 121 External audio connector
Table 18 Audio connector pin assignments
Spectral range
DC
-
1kbits/s
DC
300-8k
300-8k
20-20k
20-20k
20-20k
20-20k
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Voltage/ Max or nominal
Current levels serial
impedance
0-9V/ 0.85A
0.85A 100mW (PWB+
conn.)
Digital 0 / 47W
2.5-2.78V
2.78V 70 mA 100mW (PWB+
conn.)
2.5V 90mA
1Vpp &
2.5-2.78VDC
1Vpp &
2.5-2.78VDC
1Vpp 10W
1Vpp 10W
1Vpp 10W
1Vpp 10W
Nokia Customer Care
Notes
Insertion &
removal
detection
200mW
Not conn. in
mono
Not conn. in
mono
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