Panasonic KX-TCA181FXS, Service Manual

Page: 36 / 101

Items Check
Point
Procedure Check or
Replace Parts
( F ) Charge Control Check &
Charge Current Monitor
Check
- 1. Apply 3.5V between TR18(+) and TP17(-) with DC power supply and set
current limit to 500mA.
2. Confirm that the current limit LED of DC power supply is ON/OFF.
3. Decrease current limit ofDC power supply to 100mA.
4. Confirm that the current limit LED of DC power supply is stable. (Current limiter
is ON.)
(Ifcharge control cannot be confirmed by this procedure, please use battery to
handset power supply and try again.)
IC1, Q4, Q5,
Q9, D6, L4,
L5, R5, R6,
F1, R58,
C136, R72,
D7, L6, L7,
C129, C135,
R7
( G )* Charge Detection (OFF)
Check
- 1. Stop supplying 6V to ) and CHARGE(-).
2. Execute the command “Backloff” then “charge”.
3. Confirm that the returned value is 00 (hex).
R72, D7, L6,
L7, C129,
C135, R7, IC1,
Q4, Q5, Q9,
D6, L4, L5,
R5, R6, F1,
R58, C136
( H )* Battery Monitor Check - 1. Apply 2.25V between BATT and GND.
2. Execute the command “readbatt”.
It assumes that the return value is XX.
a) 1E XX 2C: No need to adjust
b) XX: 18 ~ 1D: Need to adjust
XX: 2D ~ 32: Need to adjust
Write AD value of2.25V to FLASH.
ex) read data: XX = 1C, write data: YY = 1C
read data: XX = 2D, write data: YY = 2D
FLASH = 0004(Low Voltage) write “YY”
Execute the command “wreeprom 00 04 01 YY”.
FLASH = 0005(No Voltage) write “YY - 1D”
Execute the command “wreeprom 00 05 01 ZZ”.
FLASH = 000A(Low Voltage BL) write “YY - 06”
Execute the command “wreeprom 00 0A 01 WW”.
Note:
ZZ = YY - 1D, WW = YY - 06
No Voltage writing data limit is ‘00’.
c) XX: 00 ~ 17: Reject
XX: 33 ~ FF: Reject
IC1, F1, C1
C3, R24, R73,
C9, R8, C61,
R43, R46,
R47, C39
( I ) Battery Low
Confirmation
- 1. Apply 2.40V between B) and BATTERY(-).
2. Confirm that there is no flashing of Battery Icon.
3. Apply 2.25V ± 0.08V between B) and BATTERY(-).
4. Confirm that there is flashing of Battery Icon.
IC1, F1, C1
C3, R24, R73,
C9, R8, C61,
R43, R46,
R47, C39
( J )* BBIC Clock Adjustment CLK 1. Apply 2.5V between B) and BATTERY(-) with DC power.
2. Execute the command “conttx”.
3. Input Command “rdeeprom 00 01 01”, then you can confirm the current value.
4. Adjust the frequency of CLK executing the command “setfreq 00 xx (where xx
is the value)” so that the reading ofthe frequency counter is 10.368000MHz ±
10Hz.
Note:
CLK is displayed only for a few seconds when executing the command “conttx”
after battery is inserted.
IC1, X1, C7,
R127, C117,
R19, IC20,
R128
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KX-TCD815RUS / KX-TCD815R UT / KX-TCA181RUS / KX-TCA181RUT