KX-TG7125RUS, KX-TG7125RUT, KX-TGA711RUS, KX-TGA711RUT - Panasonic Telephone Service Manual (repair manual). Page 48

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(G)* Charge Detection (OFF) 

Check

-

1. Stop supplying 3.5 V to J3 CHARGE(+) and J4 CHARGE(-).
2. Execute the command “Backloff” then “charge”.
3. Confirm that the returned value is 00 (hex).

IC1, Q4, Q5, 

Q9, D6, D7, 

D8, L4, 

L5, R5, R6, 

R7, R8, F1

(H)* Battery Monitor Check

-

1. Apply 2.25 V 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 of 2.25V to EEPROM.
ex) read data: XX = 1D, write data: YY = 1D
read data: XX = 2D, write data: YY = 2D
EEPROM = 0004(Low Voltage) write “YY”
Execute the command “wreeprom 00 04 01 YY”.
EEPROM = 0005(No Voltage) write “YY - 1D”
Execute the command “wreeprom 00 05 01 ZZ”.
EEPROM = 000A(Low Voltage BL) write “YY - 16”
Execute the command “wreeprom 00 0A 01 WW”.

ZZ = YY - 1D, WW = YY - 16

No Voltage writing data limit is ‘00’.
c) XX: 00 ~ 17: Reject
XX: 33 ~ FF: Reject

IC1, F1, C1 

C3, R12

(I)

Battery Low Confirma-

tion

-

1. Apply 2.40 V between BATTERY(+) and BATTERY(-).
2. Confirm that there is no flashing of Battery Icon.
3. Apply 2.25 V ± 0.08 V between BATTERY(+) and BATTERY(-).
4. Confirm that there is flashing of Battery Icon.

IC1, F1, C1 

C3, R12

(J)* BBIC Clock Adjustment

CLK

1. Apply 2.6 V between BATTERY(+) 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 xx (where xx is

the value)” so that the reading of the frequency counter is 10.368000 MHz ± 10
Hz.

Note:

CLK is displayed only for a few seconds when executing the command “conttx”
after battery is inserted.

IC1, X1, C6, 

C7, R19, 
IC4, C57

(K)* 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 = -70 dBm

2. Execute the command “regcmd60 01 02 03 04 05".
3. Initiate connection from DECT tester.
4. Confirm that the NTP value at A201 is   19 dBm ~ 25 dBm.

IC1, IC4, C66,

C58, C57, 
C50, C52, 

C53, 

R52, C60,

C61

(L)* Modulation Check and 

Adjustment

-

Follow steps 1 to 3 of (K) above.

4.Confirm that the B-Field Modulation is -350 ~ -400/+320 ~ +370 kHz/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, IC4, C66,

C58, C57, 
C50, C52, 

C53, 

R52, C60,

C61

(M) Frequency Offset Confir-

mation

-

Follow steps 1 to 3 of (K) above.

4.Confirm that the frequency Offset is < ± 45 kHz.

IC1, IC4, C66,

C58, C57, 
C50, C52, 

C53, 

R52, C60,

C61

(N) Frequency Drift Confir-

mation

-

Follow steps 1 to 3 of (K).

4.Confirm that the frequency Drift is < ± 30 kHz/ms.

IC1, IC4, C66,

C58, C57, 
C50, C52, 

C53, 

R52, C60,

C61

Items

Check 

Point

Procedure

Check or 

Replace Parts