Panasonic G600 Technical Manual page 44

ACCESSORIES
10.1.4 Test Points
TP No.
TP101
TP201
TP202
TP203
TP300
TP301
TP302
TP304
TP305
TP306
TP307
TP309
TP310
TP311
TP312
TP313
10.1.5 Adjustment and Calibration
The adjustments that can be made on the handsfree unit are to the external power supply. These are made by
adjusting two variable resistors on the PCB. The procedure must be followed if the switching voltage regulator or
any other part of the external power supply is replaced.
10.1.6 Procedure
Connect up the Handsfree unit as for normal testing, but do not connect the Handheld unit. Measure the external
voltage power supply. Adjust R102 so that this voltage is 7.8V ± 0.07V. Once the handheld unit is connected and in
a call, R144 is used to adjust the maximum current supplied.
Issue 1
Revision 0
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DESCRIPTION
Switching Voltage Regulator
External power
nLogic Power
Battery + (car)
TX Audio (To the handheld unit)
Output Amplifier Power
GND
RX Audio (To the handheld unit)
Audio GND
nHF on
Mic override speaker
Audio GND
Mic
Speaker
Audio GND
U306 pin 3 HCL
Section 10
BOARD LOCATION
U102 Pin 2
P201 Pin 15
P201 Pin 14
P203 Pin 1
P201 Pin 3
Q205 Pin E
U308 Pin 3
P201 Pin 4
P201 Pin 5
P201 Pin 7
R355, R309
P301 Pin 2
P301 Pin 1
J300 Pin 2
J300 Pin 1
U306 Pin 3
10 - 4
MCUK980101G8
Technical Guide