Panasonic KX-TCD953RUB (serv.man2) Service Manual ▷ View online
13 CHECK PROCEDURE (HANDSET)
13.1. TEST EQUIPMENT REQUIRED AND EQUIPMENT SETUP
13.2. INITIAL POWER + BBIC TESTS
1. Turn on the 3.9V supply.
2. Press the “Power-on” button.
3. Check for a “beep” and approx 10 to 30 mA current on the 3.9V supply.
4. Check the 3.0V supply voltage (TP10). It must be 2.85 +/- 0.3.
5. Connect RFCLK (TP56) to CH.1 on the scope. Send batch file RFCLK 1.
6. Check if the clock waveform is 10,368.000 kHz, +/- 40Hz.
7. Send batch file “SELF TEST”. The first 4 digits are FLASH ROM checksum, the next 2 digits are RAM test, and must be 00.
13.3. SET CLOCK FREQUENCY
1. Send batch file “RFCLK 1”.
2. Connect RFCLK (TP56) to the frequency counter.
3. Send batch file “SET FREQ nn” to set the clock frequency. The default value of nn is 80. Increase the value to increase the
frequency. The clock frequency must be 10,368.000 kHz ± 0.04 kHz.
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Note:
These tests can be repeated on Traffic Carriers 0 and 9.
13.4. QUICK Tx CHECK
1. Set the CMD60 to MODULE TEST.
2. Send batch file “H”.
3. Confidence check of Power (NTP): must be +20 to +25 dBm.
4. Confidence check of Frequency Offset: must be 0 ± 40 kHz.
5. Confidence check of Deviation of B field Data Type 01010101: must be 207 to 270 kHz.
13.5. 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 Power (NTP): must be +20 to +25 dBm.
6. Press MODULATION.
7. Set Data Type to “Fig.31”.
8. Check the Frequency Drift: must be 0 ± 45 kHz/ms.
9. Check the Frequency Offset: must be 0 ± 40 kHz.
10. Check the Deviation (Max. ± B Field) with Data Type “Fig.31”: must be 201 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 the RF LEVEL for a BER of approx. 1000ppm) : RF LEVEL must be < - 90 dBm
17. Press MENU UP.
18. Press BEARER RELEASE.
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14 TROUBLESHOOTING GUIDE
14.1. HANDSET: DOES NOT OPERATE
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14.2. HANDSET: LINK
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