Panasonic KX-TG9120FXS, Service Manual

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KX-TG9120FXS/KX-TGA910FXS
( G ) Charge Control Check &
Charge Current Monitor
Check
- 1. Apply 3.5V between TP18(+) and TP19(-) with DC power supply and set cur-
rent limit to 250mA.
2. Wait for more than two minutes.
(Wait for more than one minute when the base unit is linked with the handset)
3. Confirm that the current limit LED of DC power supply is ON/OFF.
4. Decrease current limit of DC power supply to 100mA.
5. Confirm that the current limit LED of DC power supply is stable. (Current limiter
is ON.)
(If charge control cannot be confirmed by this procedure, please use battery to hand-
set power supply and try again.)
IC1, Q9, F1,
Q10, D10, L6,
R43, R5, R6,
R7, R72, Q9,
Q11, D6, C36,
C129, R46,
R54
( H )* Charge Detection (OFF)
Check
- 1. Stop supplying 3.5V to TP18(+) and TP19(-).
2. Execute the command “Backloff” then “charge”.
3. Confirm that the returned value is 00 (hex). IC1, Q9, F1,
Q10, D10, L6,
R43, R5, R6,
R7, R72, Q9,
Q11, D6, C36,
C129, R46,
R54
( I )* 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) 18 XX 32: No need to adjust
b) XX: 00 ~ 17: Reject
XX: 33 ~ FF: Reject
IC1, F1, C1,
C3, R15, R16,
R17, C10, C11
( J ) Battery Low Confirma-
tion
- 1. Apply 2.40V between BAT+ and BAT-.
2. Confirm that there is no flashing of Battery Icon.
3. Apply 2.25V ± 0.08V between BAT+ and BAT-.
4. Confirm that there is flashing of Battery Icon. IC1, F1, C1,
C3, R15, R16,
R17, C10, C11
( K )* BBIC Clock Adjustment CLK 1. Apply 2.5V between BAT(+) and BAT(-) 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 of the 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, C35,
R12, IC20,
R127, R128
( L )* Transmitted Power Con-
firmation
- Remove the Antenna before starting step from 1 to 4.
1. Configure the DECT tester (CMD60) as follows;
<Setting>
• Test mode: PP
• RFPI: 0102030405
• Traffic Carrier: 5
• Traffic Slot: 4
• Mode: Loopback
• RF LEVEL = -70dBm
2. Execute the command “regcmd60 01 02 03 04 05”.
3. Initiate connection from DECT tester.
4. Confirm that the NTP value at ANT is 19dBm ~ 25dBm.
IC1, IC20,
C115, C120,
R66, IC7,
C118, C122,
C44, R127,
R128, R123,
R124, R125,
R126, R129,
R130, R78,
R121, R122
( M )* Modulation Check and
Adjustment
- Follow steps 1 to 3 of (K) .
4.Confirm that the B-Field Modulation is -350 ~ -400/+320 ~ +370kHz/div using
data type Fig 31.
5.Adjust the B-Field Modulation if required. (Execute the command “Readmod”
and “wrtmod xx”, where xx is the value.)
IC1, IC20,
C115, C120,
R66, IC7,
C118, C122,
C44, R127,
R128, R123,
R124, R125,
R126, R129,
R130, R78,
R121, R122
( N )* Frequency Offset Confir-
mation
- Follow steps 1 to 3 of (K) .
4.Confirm that the frequency Offset is < ± 45kHz.
IC1, IC20,
C115, C120,
R66, IC7,
C118, C122,
C44, R127,
R128, R123,
R124, R125,
R126, R129,
R130, R78,
R121, R122
Items Check
Point
Procedure Check or
Replace Parts