KX-TG7205RUJ, KX-TG7205RUM, KX-TG7205RUS, KX-TG7205RUT, KX-TG7206RUM, KX-TG7206RUS, KX-TG7206RUT, KX-TGA720RUJ, KX-TGA720RUM, KX-TGA720RUS, KX-TGA720RUT - Panasonic Telephone Service Manual (repair manual). Page 43

43

(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 2.25 V 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. Check X’tal Frequency. (10.368 MHz ± 100 Hz).
4. If the frequency is not 10.368 MHz ± 100 Hz, adjust the frequency of CLK exe-

cuting the command “setfreq xx (where xx is the value)” so that the reading of
the frequency counter is 10.368000 MHz ± 20 Hz.

Note:

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

IC1, X1, C6, 

C7, IC4, C57, 

R51

 

(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
• PACKET: PP32Z

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 20 dBm ~ 25 dBm.

IC1, IC4, C58, 

R51, 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 +220 ~ +403/-220 ~ -403 kHz/div & Mod-
ulated width   670 kHz 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, C58, 

R51, C57, 
C52, C53, 
R52, C61,

C59, C125, 

C62 

(M)* Frequency Offset Confir-

mation

-

Follow steps 1 to 3 of (K) above.

4.Confirm that the frequency Offset is < ± 50 kHz.

IC1, IC4, C58, 

R51, C57, 
C52, C53, 
R52, C61,

C59, C125, 

C62 

(N)* Frequency Drift Confir-

mation

-

Follow steps 1 to 3 of (K).

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

IC1, IC4, C58, 

R51, C57, 
C52, C53, 
R52, C61,

C59, C125, 

C62 

(O)*

Sensitivity Receiver 

Confirmation

-

Follow steps 1 to 3 of (K).

4.Set DECT tester power to -88 dBm.
5.Confirm that the BER is < 1000 ppm.

IC1, IC4, C58, 

R51, C57, 
C52, C53, 
R52, C61,

C59, C125, 

C62 

Items

Check 

Point

Procedure

Check or 

Replace Parts