Panasonic KX-TG9471B - Page 30

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KX-TG9471B/KX-TG9472B/KX-TGA939T
9.1.3. Check Link
9.1.3.1. Base Unit
Cross Reference:
Power Supply Circuit (P.9)
Check Point (Base Unit) (P.40)
Note:
(*1) Refer to Troubleshooting by Symptom (Base Unit and Charger Unit) (P.40).
Check around Power Supply Circuit.
Adjust TP1.8 V voltage to 1.8 V.
Refer to Check Point...(E).
Does Base Unit make link with normal working
Portable?
Check around X501 and RF module and adjust
clock frequency.
Refer to Check Point...(H).
NO
NO
NO
NO (*1)
NO
YES
YES
YES
YES
YES
NO
NO
NO
Replace with a new Circuit Board.
Is the modulation OK?
Refer to Check Point...(L).
Is the voltage of TP+3.3 about 3.3 V?
Refer to Check Point...(B).
Is the voltage of TP4.0V about 4.0 V?
Refer to Check Point...(A).
Is there CMD60 (: DECT Tester)?
Does the RF clock (CLK) oscillate at 10.368 MHz in
Base Unit Test Mode?
Refer to Check Point...(H).
NO
YES
Is the voltage of TP+2.5V about 2.5 V?
Refer to Check Point...(C).
Is the voltage of TP+1.8 V about 1.8 V?
YES
Is the voltage of TP 3.0V about 3.0 V?
YES
Is the NTP value OK?
Refer to Check Point...(K).
Does Base Unit make link with CMD60 in
Base Unit Test Mode?
Refer to Check Point...(K).
NO
YES
Base Unit is OK. Check Portable.
NO
YES
YES
Is the Frequency Offset OK?
Refer to Check Point...(M).
NO
Check around Q381 and IC501: 104, 103
NO
OK
...
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