Panasonic KX-TCD953RUB (serv.man2) Service Manual ▷ View online
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
12 CHECK PROCEDURE (BASE UNIT)
12.1. TEST EQUIPMENT REQUIRED AND EQUIPMENT SETUP
12.2. INITIAL POWER + BBIC TESTS
1. Turn on the 10V supply.
2. Check for approx. 75 mA current on the 10V supply.
3. Check the 4V supply voltage (TP91). It must be 4.2 ± 0.2V.
4. Check the 3.1V supply voltage (TP95). It must be 3.1 ± 0.2V.
5. Check the 6V supply voltage (TP109). It must be 6.4 ± 0.3V.
6. Connect SCLK (TP148) to CH.1 on the scope.
7. Check if the clock waveform is 3,456 kHz.
8. Send batch file “SELF TEST”.
12.3. SET THE CLOCK FREQUENCY
1. Transfer SCLK (TP148) to the frequency counter.
2. Send batch file “SETFREQ nn” to set the clock frequency. The default value of nn is 80. Increase the value to increase the
frequency and vice-versa. The clock frequency must be 3,456 kHz (± 0.007 kHz).
12.4. QUICK Tx CHECK
1. Set the CMD60 to MODULE TEST.
2. Send batch file “RF-I”.
3. Confidence check of Power (NTP): it must be +20 to +25 dBm.
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KX-TCD953RUB
12.5. LOOPBACK TEST
1. Set the CMD60 to MANUAL TEST.
2. Set the CMD60 TRAFFIC CARRIER to 5.
3. Send batch file “TESTMODE”.
4. On the CMD60, press “SETUP CONNECT”.
5. Check the Power (NTP): It must be +20 to +25 dBm.
6. Press MODULATION.
7. Set Data Type to “Fig.31”.
8. Check the Frequency Drift: it must be 0 ± 45 kHz/ms.
9. Check the Frequency Offset: it must be 0 ± 40 kHz.
10. Check the Deviation (Max. ± B Field) with Data Type “Fig.31”: it must be 202 to 404 kHz.
11. Press MENU UP.
12. Press POWER RAMP.
13. Check the Burst fits mask.
14. Press MENU UP.
15. Press BER.
16. Note the Sensitivity (reduce RF LEVEL for a BER of approx. 1000ppm) : the RF LEVEL must be < - 88 dBm.
17. Press MENU UP.
18. Press BEARER RELEASE.
Note:
These tests can be repeated on Traffic Carriers 5 and 9.
12.6. TELEPHONE LINE TESTS
1. Connect the tel line from the base under test to the line simulator.
2. Send batch file “OFFHOOK”.
3. Check if the green “In-Use” LED is on.
4. Set the line current to 40 mA on the line simulator.
5. Send batch file “ONHOOK”.
6. Check that the line current is 0 ± 0.5 mA.
7. Check if the green “In-Use” LED is off.
8. Send batch file “OFFHOOK”.
9. Check the DC Voltage on TP45. It must be 9.5 ± 0.5V.
10. Send batch file “LINIMP 1”.
11. Check the DC Voltage on TP45. It must be < 4.0V.
12. Send batch file “LINIMP 0”.
13. Send batch file “PULDIAL”.
14. Observe on the line simulator current meter that 5 dial pulses are output causing the current to reduce to approx. 20mA.
15. Send batch file “STRTDTMF”.
16. Check on the scope that a DTMF waveform is output on that tel line.
17. Send batch file “STOPDTMF”.
18. Disconnect the tel line from the base under test to the line simulator.
19. Connect the “Bell” Oscillator to the tel line.
20. Set the “Bell” Oscillator voltage to 32V RMS 23Hz.
21. Send batch file “RINGDET”.
22. Check that the ringing voltage has been detected (1 = detected).
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KX-TCD953RUB
12.7. CHARGE CURRENT TEST
1. Connect the 11V supply to J2 pin 6 (+) and J2 pin 5 (-).
2. Connect the a series load resistor of 56
Ω
/2 W to J3 (+) and J4 (-).
3. Switch on the 11V supply.
4. Check the Charge Voltage to J3 and J4 4.4 ± 1.0 V.
5. Switch off the 11V supply.
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KX-TCD953RUB
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