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Adjustment objectives
11 ADJUSTMENT (HANDSET)
Adjustment item
Symptom
Remedy
Clock frequency
Synchronization with the portable handset is lost immediately.
Perform the adjustments described in item(1).
No link is established.
Low battery
The communication (standby) times is short.
Perform the adjustments described in item(2).
The low battery display period is too long or too short.
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. Input a 3.9V supply to the handset J5 (+) and J8 (GND).
3. Connect the frequency counter to TP56 and J8 (GND).
4. Press the “power on” button.
5. Send batch file “RFCLK 1”.
6. 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.
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”.
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KX-TCD953RUB
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