Check Link - Panasonic KX-TG5521RUB Service Manual

9.1.3.

Check Link

9.1.3.1. Base Unit
Does Base Unit make link with normal working
Handset?
NO
Is the voltage of VDD3 about 3.0 V?
Refer to Check Point...(A).
YES
Is the voltage of VDD1 about 1.8 V?
YES
Does the RF clock (CLK) oscillate at 10.368 MHz in
Base Unit Test Mode?
Refer to Check Point...(G).
YES
Is there CMD60 (: DECT Tester)?
YES
Does Base Unit make link with CMD60 in Base Unit
Test Mode?
Refer to Check Point...(J).
YES
Is the NTP value OK?
Refer to Check Point...(J).
YES
Is the modulation OK?
Refer to Check Point...(K).
YES
Is the Frequency Offset OK?
Refer to Check Point...(L).
YES
Note:
(*1) Refer to Troubleshooting by Symptom (Base Unit and Charger Unit) (P.36)
Cross Reference:
Check Point (Base Unit) (P.36)
Power Supply Circuit (P.9)
YES
Base Unit is OK. Check Handset.
NO
Check around Power Supply Circuit.
NO
Adjust VDD1 voltage to 1.8 V.
Refer to Check Point...(B).
OK
Check around X1 and IC801 and adjust clock
NO
frequency.
Refer to Check Point...(G).
NO (*1)
NO
NO
Replace with a new Circuit Board.
NO
NO
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KX-TG5521RUB/KX-TGA551RUB