32
KX-TG9471B/KX-TG9472B/KX-TGA939T
9.1.3.2.
Portable
Cross Reference:
Power Supply Circuit/Reset Circuit
(P.12)
Check Point (Portable)
(P.44)
Note:
(*1) Refer to
Troubleshooting by Symptom (Portable)
(P.44).
Check around
Power Supply Circuit/Reset Circuit
.
Check BBIC (IC1).
Does Portable make link with normal working
Base Unit?
Check around X1 and RF module and adjust
clock frequency.
Refer to
Check Point...(J)
.
NO
NO
NO
NO
NO
NO (*1)
NO
Is the voltage of "+1.8" about 1.8 V?
Refer to
Check Point...(A)
.
Is the voltage of CP2.5 about 2.5 V?
Refer to
Check Point...(B)
.
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
Replace with a new Circuit Board.
Is the voltage of CP4.0 over 4.0 V?
Does the RF clock (CLK) oscillate at 10.368 MHz
in Portable Test Mode?
Refer to
Check Point...(J)
.
Is the NTP value OK?
Refer to
Check Point...(K)
.
Does Portable make link with CMD60 in
Portable Test Mode?
Refer to
Check Point...(K)
.
NO
Portable is OK. Check Base Unit.
YES
OK
Is there CMD60 (: DECT Tester)?
YES
Is the modulation OK?
Refer to
Check Point...(L)
.
YES
Is the Frequency Offset OK?
Refer to
Check Point...(M)
.
Adjust "+1.8" voltage to 1.8 V.
Refer to
Check Point...(A)
.
...
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