Read Panasonic KX-TCD951EB / KX-TCD955EC Service Manual online
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KX-TCD951EB/KX-TCD955EC
Item(2)
1. Connect the serial link to test computer for J6 (serial data) and J8 (GND).
2. Set the battery voltage to 4.6V at J1 and J2.
3. Press the “power on” button.
4. Send batch file “READBATT.BAT”. The returned hex value is M2.
5. Send batch file “WRTBATT.BAT M2”.
6. Set the battery voltage to 3.5V at J5 (+).
7. Send batch file “READBATT.BAT”. The returned hex value is M1.
8. Send batch file “WRTBATT.BAT M1”.
9. Calculate the low value 2 level:
10. Send “WRTBATT.BAT M3”.
ADJUSTMENT (HANDSET)
Adjustment objectives
Tools required for adjustments
Frequency counter
Power supply unit (DC 3V~5V, 1A)
Personal computer
Serial communication tool
Test software (batch files)
Item(1)
1. Connect the serial link to test computer to J6 (serial data) and J8 (GND).
2. Turn
off power for the base unit.
3. Input a 3.9V supply to the handset J5 (+) and J8 (GND).
4. Connect the frequency counter to TP56 and J8 (GND).
5. Press the “power on” button.
6. Send batch file “FIXFREQ.BAT”.
7. Use batch file “SETFREQ.BAT” to set the clock frequency.
The default value is 80. Increase the value to increase
the frequency and vice-versa. The clock frequency must be 10,368.000 kHz ± 0.02 kHz.
Adjustment item
Symptom
Synchronization with the base unit is lost immediately.
No link is established.
Remedy
Perform the adjustments described in item(1).
Clock frequency
The communication (standby) times is short.
The low battery display period is too long or too short.
Perform the adjustments described in item(2).
Low battery
M3 Dec =
M1 Dec – (M2 Dec – M1 Dec) X 0.1
4.6 – 3.5
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