Panasonic KX-TG2560B / KX-TG2560S Service Manual ▷ View online
26
KX-TG2560B/KX-TG2560S
1) Warm up the Marconi Radio Tester, for at least 30 minutes to allow internal crystal
oscillation to become stable.
2) Refer to figures below for handset wire connections.
3) Disconnect the handset antenna from the PCB. If you allow the antenna to remain and be a load, the readings will be wrong.
4) Supply DC 3.9V Handset PCB using a DC power supply.
5) Press TALK, then press "5", "8" and "0" simultaneously.
6) Press INTERCOM.
7) Press "#" key. (set SS-RESTART Mode)
8) Press "TALK" (initials channel CH1)
oscillation to become stable.
2) Refer to figures below for handset wire connections.
3) Disconnect the handset antenna from the PCB. If you allow the antenna to remain and be a load, the readings will be wrong.
4) Supply DC 3.9V Handset PCB using a DC power supply.
5) Press TALK, then press "5", "8" and "0" simultaneously.
6) Press INTERCOM.
7) Press "#" key. (set SS-RESTART Mode)
8) Press "TALK" (initials channel CH1)
Carrier Frequency Check:
Set Marconi ( indicates the button of Marconi)
Tx Test : Select Tx Test Mode
Tx Freq. : Input Carrier Freq.=904.560MHz (CH1)
Tx Freq. : Input Carrier Freq.=904.560MHz (CH1)
1. 1) Press "8" key once to set "High" Power Mode.
2) Press "0" key once to set "SS" Mode OFF.
2. Check TX Frequency = 904.560 MHz ± 3kHz (offset
2) Press "0" key once to set "SS" Mode OFF.
2. Check TX Frequency = 904.560 MHz ± 3kHz (offset
≤
±3kHz).
3. When value if over, adjust VC490.
Transmit Power Check:
Set Marconi ( indicates the button of Marconi)
Tx Test : In Select Tx Test Mode
Tx Freq. : Input Carrier Freq.=904.560MHz (CH1)
TX Power : Select TX Power
Broad/Narrow : Select "Broad Band" Mode
Tx Freq. : Input Carrier Freq.=904.560MHz (CH1)
TX Power : Select TX Power
Broad/Narrow : Select "Broad Band" Mode
1. 1) Press "8" key once to set "High" Power Mode.
2) Press "0" key once to set "SS" Mode ON.
2. Check TX Power reading. It should equal +12 dBm ± 4 dB (+8 dBm ~ +16 dBm).
2) Press "0" key once to set "SS" Mode ON.
2. Check TX Power reading. It should equal +12 dBm ± 4 dB (+8 dBm ~ +16 dBm).
Receiving Sensitivity Check:
1. Connect audio cable BNC side to AF INPUT in Marconi and other side to TP-SP+ and TP-GND.
2. Set Marconi ( indicates the button of Marconi.) Enter the following setting:
2. Set Marconi ( indicates the button of Marconi.) Enter the following setting:
Rx Test : Select Rx Test Mode
RF Gen ON/OFF : RF Output on
FREQ. : Input 656.160MHz = (Handset Rx Frequency) - (1750MHz) = 2406.160MHz - 1750MHz
RF Gen ON/OFF : RF Output on
FREQ. : Input 656.160MHz = (Handset Rx Frequency) - (1750MHz) = 2406.160MHz - 1750MHz
LEVEL : Input RF Level = [(-30dBm) + (Jig Loss CN1
→
CN2
→
CN3
→
CN4)]
Mod Gen , ON/OFF : FM on
FREQ. : Input AF Freq. = 1.0kHz
Level : Input FM Level = 24kHz
AF Filter , 0.3 to 3.4k : Select AF Filter
FREQ. : Input AF Freq. = 1.0kHz
Level : Input FM Level = 24kHz
AF Filter , 0.3 to 3.4k : Select AF Filter
3. Press the SINAD button on Marconi until the display shows SINAD value.
Press the dB button.
4. Press the "RF Gen", and "Level" button of Marconi.
5. Using the VARIABLE knob on Marconi decrease RF GEN LEVEL value until SINAD value is 12 dB.
6. Check the Amplitude. This should be less than [-100dBm + (Jig Loss CN1
Press the dB button.
4. Press the "RF Gen", and "Level" button of Marconi.
5. Using the VARIABLE knob on Marconi decrease RF GEN LEVEL value until SINAD value is 12 dB.
6. Check the Amplitude. This should be less than [-100dBm + (Jig Loss CN1
→
CN2
→
CN3
→
CN4).]
Squelch Check:
1. Connect scope probe (X1) lead to TP-SQL, negative to GND and BNC end to scope.
2. Set scope to the following condition: TIME/DIV = 1 msec, VOLT/DIV = 1 V
3. Set RF GEN LEVEL to [-95 dBm + (Jig Loss CN1
2. Set scope to the following condition: TIME/DIV = 1 msec, VOLT/DIV = 1 V
3. Set RF GEN LEVEL to [-95 dBm + (Jig Loss CN1
→
CN2
→
CN3
→
CN4).] Check scope voltage is LOW.
4. Set RF GEN LEVEL to [-120 dBm + (Jig Loss CN1
→
CN2
→
CN3
→
CN4).] Check scope voltage is HIGH.
5. When scope does not show above condition at item 5 of Receiving Sensitivity Check, adjust VR501 until scope voltage toggles
between LOW & HIGH.
between LOW & HIGH.
HOW TO CHECK THE RF SECTION (Handset)
HANDSET PREPARATION
Please perform the following steps to prepare the HANDSET for alignment. Please refer to the HANDSET REFERENCE
DRAWING for connection and test point locations.
DRAWING for connection and test point locations.
1.
Remove battery cover with jig, and remove battery.
2.
Unscrew both screws at the case bottom.
3.
Remove the back of the case with jig and unsolder the 2 antenna leads.
ADJUSTMENT (Handset)
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
28
KX-TG2560B/KX-TG2560S
(A)
Standard Frequency
Marconi
Tx Test : Select Tx Test Mode
Tx Freq. : Input 904.560MHz
SS Mode of handset: OFF
(Follow the procedure (8).)
Output power of handset: "High"
(Follow the procedure (7).)
TP Tx_ANALOG pull up.
Connect High Frequency Cable to right RF
connector.
Tx Freq. : Input 904.560MHz
SS Mode of handset: OFF
(Follow the procedure (8).)
Output power of handset: "High"
(Follow the procedure (7).)
TP Tx_ANALOG pull up.
Connect High Frequency Cable to right RF
connector.
Check Marconi TX FREQ equals 904.560 MHz ± 0.003
MHz (offset
MHz (offset
≤
±3kHz). When value is overed
904.560 MHz ± 0.003 MHz (offset
≤
±3kHz), Adjust at
VC490.
SYMPTOM/REMEDY TABLE
If you have one of the listed symptoms, please refer to this table and make the appropriate adjustments.
Does not link with BASE UNIT
Speaker level is unstable
Tx sound is unstable
HANDSET ADJUSTMENT PREPARATION
Please perform the following procedure before starting the Adjustment Procedure. You only have to perform this procedure only
once to complete all Items, but you will have to perform this procedure to make an individual Adjustment Item.
once to complete all Items, but you will have to perform this procedure to make an individual Adjustment Item.
1.
You will need all equipment listed in the Item's EQUIPMENT section.
2.
Setup all equipment as specified in following item's Equipment section.
3.
Apply power to the HANDSET, and press TALK key when the base unit is not to be powered on.
4.
Press 5, 8 and 0 keys at the same time, until you hear a beep.
5.
Release the 3 keys. If you hear 3 beeps, remove the power from the HANDSET and repeat the last 2 steps.
6.
Press the INTERCOM key and "#" key, then press the TALK key. HANDSET should now be in TEST MODE (CH 1 TALK).
The LCD indicate "TALK". If the HANDSET is not in TEST MODE, remove the power and repeat the last 3 steps.
7. The output power switches "Low", "High" at every pressing "8". (Initial setting: "Low") (Pressing "8" once: "High")
8. "SS mode" switches ON/OFF at every pressing "0". (Initial Setting: ON)
9. Press "0" key twice when the "SS" is not synchronized during reception test.
10.
8. "SS mode" switches ON/OFF at every pressing "0". (Initial Setting: ON)
9. Press "0" key twice when the "SS" is not synchronized during reception test.
10.
Remove the keypad membrane and lay it aside.
ADJUSTMENT PROCEDURE
Marconi
Rx Test : Mode Select
RF Gen ON/OFF : RF Output on
FREQ. : Input Rx Frequency=
656.160MHz=2406.16MHz
RF Gen ON/OFF : RF Output on
FREQ. : Input Rx Frequency=
656.160MHz=2406.16MHz
-1750MHz (CH1)
LEVEL : Input RF Level=(-25dBm)+
(Jig Loss / CN1
→
CN2
→
CN3
→
CN4)
Mod Gen ON/OFF : FM on
FREQ. : Input "1.0kHz"
LEVEL : Input FM Level "24.0kHz dev."
AF Filter , 0.3 to 3.4kHz : Select AF Filter
SS Mode of handset: ON
(Follow the above-mentioned procedure
(8).)
High Frequency Cable to left RF
Connector. Audio Cable positive
lead to isolation capacitor, negative
lead to GND, BNC end to AF INPUT
FREQ. : Input "1.0kHz"
LEVEL : Input FM Level "24.0kHz dev."
AF Filter , 0.3 to 3.4kHz : Select AF Filter
SS Mode of handset: ON
(Follow the above-mentioned procedure
(8).)
High Frequency Cable to left RF
Connector. Audio Cable positive
lead to isolation capacitor, negative
lead to GND, BNC end to AF INPUT
Set handset volume to medium. Adjust VR202 until AF
VOLTS equals -19dBm ± 1dBm
VOLTS equals -19dBm ± 1dBm
Note
This voltage reading is with speaker or load attached to
the HANDSET P.C.Board.
This voltage reading is with speaker or load attached to
the HANDSET P.C.Board.
(B)
SP Output
Adjust Item (B), (C) and (E).
Adjust Items (A).
Adjust Item (D).
ADJUSTMENT ITEM
DESCRIPTION
EQUIPMENT
PROCEDURE
REMEDY
SYMPTOM
(Tx Test)
(Rx Test)
29
KX-TG2560B/KX-TG2560S
Marconi
Rx Test : Mode Select
RF Gen ON/OFF : RF Output on
FREQ. : Input Rx Frequency=
656.160MHz=2406.16MHz
RF Gen ON/OFF : RF Output on
FREQ. : Input Rx Frequency=
656.160MHz=2406.16MHz
-1750MHz (1ch)
LEVEL : Input RF Level=(-25dBm)+
(Jig Loss / CN1
→
CN2
→
CN3
→
CN4)
Mod Gen ON/OFF : FM on
FREQ. : Input "1.0kHz"
LEVEL : Input FM Level "24.0kHz dev."
AF Filter 0.3 to 3.4kHz : Select AF Filter
SS Mode of handset: ON
(Follow the above-mentioned procedure
(8).)
Install 150
FREQ. : Input "1.0kHz"
LEVEL : Input FM Level "24.0kHz dev."
AF Filter 0.3 to 3.4kHz : Select AF Filter
SS Mode of handset: ON
(Follow the above-mentioned procedure
(8).)
Install 150
Ω
resistor (150
Ω
=SP load) or
remove the SP wires. It can be
remedied either one, but not both at
the same time.
remedied either one, but not both at
the same time.
Oscilloscope
SETUP X1 probe connected to INPUT 1.
Probe ground connected to GND.
TIME/DIV 1ms
VOLT/DIV 1V
Auto trigger
Probe ground connected to GND.
TIME/DIV 1ms
VOLT/DIV 1V
Auto trigger
On Marconi, press SINAD until the display
shows the SINAD value and press dB. Then press
"Rx Test", "RF Gen", and "Level" on Marconi. Lower
Amplitude LEVEL at SINAD 12 dB and confirm that
Amplitude is less than -100 dBm+(Jig Loss / CN1
"Rx Test", "RF Gen", and "Level" on Marconi. Lower
Amplitude LEVEL at SINAD 12 dB and confirm that
Amplitude is less than -100 dBm+(Jig Loss / CN1
→
CN2
→
CN3
→
CN4). Attach the
oscilloscope probe to TP-SQL. When Amplitude is
set at -95 dBm +(Jig Loss / CN1
set at -95 dBm +(Jig Loss / CN1
→
CN2
→
CN3
→
CN4), confirm that the signal of TP-SQL is Low. After
that, set Amplitude at -120 dBm +(Jig Loss / CN1
that, set Amplitude at -120 dBm +(Jig Loss / CN1
→
CN2
→
CN3
→
CN4), and confirm that the signal of
TP-SQL is High.
When level is NG, adjust VR501 following Squelch
Check item 5 of Base Unit RF (Refer to page 12).
When level is NG, adjust VR501 following Squelch
Check item 5 of Base Unit RF (Refer to page 12).
(D)
Squelch
(RX sensitivity confirmation
and squelch adjustment)
Adjust VR301 to make the voltage of TP-RSSI
2.00V ± 0.03V.
2.00V ± 0.03V.
Marconi
Rx Test : Mode Select
RF Gen ON/OFF : RF Output on
FREQ. : Input Rx Frequency=
656.160MHz=2406.16MHz
RF Gen ON/OFF : RF Output on
FREQ. : Input Rx Frequency=
656.160MHz=2406.16MHz
-1750MHz (CH1)
LEVEL : Input RF Level=(-25dBm)+
(Jig Loss / CN1
→
CN2
→
CN3
→
CN4)
Mod Gen ON/OFF : FM on
FREQ. : Input "1.0kHz"
LEVEL : Input FM Level "24.0kHz dev."
AF Filter 0.3 to 3.4kHz : Select AF Filter
SS Mode of handset: ON
(Follow the above-mentioned procedure
(8).)
FREQ. : Input "1.0kHz"
LEVEL : Input FM Level "24.0kHz dev."
AF Filter 0.3 to 3.4kHz : Select AF Filter
SS Mode of handset: ON
(Follow the above-mentioned procedure
(8).)
(C)
RSSI Level Adjustment
ADJUSTMENT ITEM
DESCRIPTION
EQUIPMENT
PROCEDURE
(Rx Test)
(Rx Test)
(E)
MIC Input
(MIC Modulation)
(Tx Test)
Marconi
Tx Test : Tx Test Mode Select
Tx Freq. : 904.560MHz
Audio Gen Gen1/Gen2 : Select
Tx Freq. : 904.560MHz
Audio Gen Gen1/Gen2 : Select
Gen1 (AF1)
ON/OFF : AF Gen1 "ON"
FREQ. : Input "1.0kHz"
LEVEL : Input "-34dBm"
Mod Meter IF Filter 300kHz Return :
FREQ. : Input "1.0kHz"
LEVEL : Input "-34dBm"
Mod Meter IF Filter 300kHz Return :
Select IF Filter
AF Filter 0.3 to 3.4kHz : Select AF Filter
SS Mode of handset: OFF
(Follow above mentioned procedure (8).)
Out put Power off handset:High
(Follow the procedure (9).)
TP Tx ANALOG pull up.
The capacitor used must be greater than
1
SS Mode of handset: OFF
(Follow above mentioned procedure (8).)
Out put Power off handset:High
(Follow the procedure (9).)
TP Tx ANALOG pull up.
The capacitor used must be greater than
1
µ
F (c
•†
µ
F).
Connect Audio Cable positive lead to TX
AF, negative lead to GND, BNC end to
AF GEN OUTPUT.
AF, negative lead to GND, BNC end to
AF GEN OUTPUT.
Adjust VR201 until Marconi MOD LEVEL equals
28 kHzdev. ± 0.5 kHz
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