36
KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B
10.1.5.2. Portable
Cross Reference:
Power Supply Circuit/Reset Circuit
(P.18)
Check the RF part
(P.37)
Note:
*1 How to 3.0V:
Execute the command "VDA"
Refer to
Things to Do after Replacing IC or X'tal
(P.57) for Portable.
*2 How to adjust the frequency of X1:
To see the frequency, execute the command “SFR“, then check the TP_CKM (IC1-57pin).
To adjust frequency, send command “SFR
“until the frequency counter becomes13.824 MHz ±
83 HZ.
Check around
Power Supply Circuit/Reset Circuit
.
3.0V Vottage to 3.0 V
Does Portable make link with Base Unit?
(Correct working unit)
Check around X1 and RF module and adjust
clock frequency.
NO
NO
NO
NO
Is the
v
oltage of TP VBAT about 2.2~2.8 V?
Is the
v
oltage of TP VDDC about 1.2 V?
YES
YES
YES
YES
Is the
v
oltage of TP 3.0 V about 3.0 V?
Does the RF clock (CLK) oscillate: 13.824 MHz
in Portable Test Mode?
Portable is OK. Check Base Unit.
YES
OR
Check the RF part
Check the batteries.
*1
*2
Содержание KX-TG4771B
Страница 65: ...65 KX TG4771B KX TG4772B KX TG4773B KX TGA470B Memo ...
Страница 72: ...72 KX TG4771B KX TG4772B KX TG4773B KX TGA470B 14 6 Portable LED LED KX TGA470 SCHEMATIC DIAGRAM Handset LED ...
Страница 74: ...74 KX TG4771B KX TG4772B KX TG4773B KX TGA470B Memo ...
Страница 80: ...80 KX TG4771B KX TG4772B KX TG4773B KX TGA470B Memo ...