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KX-TG3661JXM/KX-TG3662JXM/KX-TG3668JXM/KX-TG3669JXM/KX-TGA365JXM
12.7. Adjustment of Cordless Handset
Cross Reference:
Power Supply Circuit
(P.16)
When IC1(BBIC) or IC2 (EEPROM) is exchanged, the Bandgap adjustment and the Frequency adjustment are necessary.
When X1 (X'tal) is exchanged, the Frequency adjustment is necessary.
Procedure:
1. Open a window of MS-DOS mode from the start-up menu.
2. Change directory to the copied folder.
Ex) If you initialize TG3661****, you change directory to “..\PNZZTG****\”
3. Type “
SET_COM 1
” from the keyboard (when COM port 1 is used for the connection).
4. Type “
readid
”. Check ID code on PC screen.
If OK (ID is displayed), go to advances to the adjustment process.
If NG (ID is not displayed), you have to stop this procedure, and check your PC environment.
BandGAP Voltage Adjustment
1. Check BandGap voltage. (TP: +1.8V- GND)
2. If voltage value is 1.8 V ± 0.02 V then OK, go to
Frequency Adjustment
process.
Example
If voltage value is not 1.8 V ± 0.02 V then, go to step 3.
D:\PNZZTG****>bandgap
3. Type “
bandgap
”, you can check registered value of parameter.
08
When you want to up the voltage: “Value+1”.
D:\PNZZTG****>bandgap 09
When you want to down the voltage: “Value-1”.
OK
4. Type “
bandgap nn
”, you can register a new parameter value.
D:\PNZZTG****>
5. Please operate step1 to 5 again until the voltage becomes it within the range
(1.8V ± 0.002V).
Frequency Adjustment
1. Type “conttx” then set to RF burst mode. (Respons “OK”)
2. Check Frequency. (TP: RFCLK-GND)
Example
3. If Frequency value is 10.368000 MHz 41 Hz then OK , finished Adjustment process
D:\PNZZTG****>conttx
- Please turn off the power of PCB board.
OK
If Frequency value is not 10.368000 MHz 41 Hz then, go to step 4.
D:\PNZZTG****>setfreq
4. Type “
setfreq
”, you can check registered value of parameter.
66
registered value
When you want to up the frequency: “Value -1”.
D:\PNZZTG****>setfreq 65
When you want to down the frequency: “Value +1”.
OK
5. Type “
setfreq nn
”, you can register a new parameter value.
D:\PNZZTG****>
6. Please operate step 4 to 6 again until the Frequency becomes it within the range
(10.368MHz ± 5Hz).
Please confirm the following item when the adjustment does not go well.
Symptom
item
Can not Adjust Bandgap Voltage
Please check
Power Supply Circuit
.
When it does not improve even if the above-mentioned is confirmed, IC1 might be defective.
Please check soldering.
Please confirm the following item when the adjustment does not go well.
Symptom
item
Can not Adjust RFCLK Frequency
Please check
VDDRF (R2, C10),
RFCLK (R5, L1, C708)
When it does not improve even if the above-mentioned is confirmed, IC1 or IC300, IC301 (RF unit) might be defective.
Please check soldering.
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