Panasonic KX-FG2452CX Service Manual page 200

KX-FG2452CX
15.1.2. Adjust Battery Low Detector Voltage (Handset)
After Handset's DSP (IC201) or EEPROM (IC202) replacement, Re-writing Battery Low voltage to EEPROM is required.
With following Handset Adjustment Flow, adjust DC power supply and DC voltmeter by the procedure below.
1. Set DC power supply to 2.6V.
2. Set up Handset in TEST mode (Adjustment flow).
3. Press [1] key and [OFF] key to Adjust Batt Low mode. ("Bat Adj" is displayed on LCD)
4. Change the voltage of the DC power supply to 2.3V accurately.
* Check the voltage at P.C. board pads because some voltage drops occur due to the usage of long or thin cables.
5. Press [TALK] key to write voltage value in EEPROM.
6. Turn the power off. Then this value is available.
Note:
Refer to Handset Reference Drawing (P.203) for connection of DC power supply and voltmeter.
Cross Reference:
Adjustment Mode Flow Chart for Handset (P.201)
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