Read Panasonic KX-TCD951EB / KX-TCD955EC Service Manual online
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KX-TCD951EB/KX-TCD955EC
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 < 3.5V.
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).
CHARGE CURRENT TEST
1. Connect the 11V supply to J2 pin 6 (+) and J2 pin 5 (–).
2. Connect the ammeter with a series load resistor of 56
/2 W to J3 (+) and J4 (–).
3. Switch on the 11V supply.
4. Check the Charge Voltage to J3 and J4 9.5 ± 0.5 V.
5. Switch off the 11V supply.
6. Connect the 11V supply to the “11V Supply” sockets on the test jig.
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