Read Panasonic KX-TG2560B / KX-TG2560S Service Manual online
27
KX-TG2560B/KX-TG2560S
4. Unscrew the antenna mounting screw, and pull out the antenna.
5.
Unscrew all 7 P.C.Board mounting screws.
6.
Unsolder both speaker connections on P.C.Board.
7.
Remove the HANDSET P.C.Board.
8.
Remove the keypad membrane.
9.
Solder High Frequency Cable open end to ANT and RF GND points.
10.
Using the Digital Multimeter, measure DC VOLTS output on the Telephone Analyzer. Adjust the output voltage to 3.9V DC.
11.
Solder battery connection wires at the points shown in the HANDSET REFERENCE DRAWING. Solder the positive lead to
TP-V
DD
, towards the component side of the P.C.Board. Solder the negative lead to the TP-Vss. DO NOT APPLY POWER
TO THE HANDSET AT THIS TIME!!!!!!
12.
Solder a small, insulated piece of wire to GND as well.
13.
Solder 1 isolation capacitor's positive lead to SP+ test point.
14.
Solder a small, short, insulated wire to MIC test point.
15.
Lay the keypad membrane over the keypad switch contacts.
HANDSET REFERENCE DRAWING
Marconi
Tx Test Mode
Tx Test Mode
GND
CN4
CN1
ANT
Marconi
Rx Test Mode
CN3 CN2
1750MHz
PN
ANT
VR501
Squelch Adjust
Squelch Adjust
VR201
MIC
Dummy Resistor Battery
SW1
SW3
DC3.9V
Marconi
DC3.6V
DC3.45V
DC3.45V
DC Pwer supply
Ni-Cd Battery
V
MIC Level Adjust (TX)
VR500
RSSI Voltage
Adjust
RSSI Voltage
Adjust
VC490
Marconi
Oscilloscope
TP-SP-
TP-SP+
150
Transmitting
Frequency Adjust
Frequency Adjust
VR202
SP Level Adjust
Audio Level Adjust (RX)
SP Level Adjust
Audio Level Adjust (RX)
SQL
Oscilloscope
(TP-SQL)
Oscilloscope
(TP-SQL)
RSSI
DC Volt Meter
(TP-RSSI)
DC Volt Meter
(TP-RSSI)
TP Tx ANALOG
pull up
A
~
anode of LED908
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