KX-TG2560B, KX-TG2560S - Panasonic Telephone Service Manual (repair manual). Page 28

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(A)

Standard Frequency

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.

Check Marconi TX FREQ equals 904.560 MHz ± 0.003
MHz (offset 

≤ 

±3kHz). When value is overed

904.560 MHz ± 0.003 MHz (offset 

≤ 

±3kHz), Adjust at

VC490.

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

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.

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.

Remove the keypad membrane and lay it aside.

Rx Test  : Mode Select
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

Set handset volume to medium. Adjust VR202 until AF
VOLTS equals -19dBm ± 1dBm

Note
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)