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KX-TG8301UAB/KX-TG8301UAJ/KX-TG8301UAT/KX-TG8301UAW/KX-TG8302UAB/KX-TG8302UAT/KX-TGA830RUB/KX-TGA830RUJ/KX-TGA830RUT/KX-TGA830RUW

After the measuring, suck up the solder of TP.
The connection of adjustment equipment is as shown in Adjustment Standard (Charger Unit) (P.65).

(Q)

Audio Check

-

1. Link with Handset.
2. Input -45dBm/1kHz to MIC of Handset.

Measure the Level at Line I/F and distortion level.

3. Confirm that the level is -10 dBm ± 2 dBm and that the distortion level is < 5%

at TEL Line (600 

Ω Load).

4. Input -20 dBm/1 kHz to Line I/F.

Measure the level at Receiver of Handset and distortion level
(*Receive volume set to second position from minimum). 

5. Confirm that the level is -21 dBm ± 2 dBm and that the distortion level is < 5%

at Receiver (Volume Middle, 150 

Ω Load).

IC7, SA1, L1, 

L2, D3, Q3, Q4, 

R14, R15, R16, 

R17

(R)

Charging Check

-

1. Connect Charge Contact 12 

Ω/2 W resistor between charge+ and charge-.

2. Measure and confirm voltage across the resistor is 3.10 V ± 0.3 V.

R55, R56, R57, 

D22, D23, C623

Items

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Point

Procedure

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Replace Parts

(A)

Charging Check

-

1. Connect Charge Contact 12 

Ω/2 W resistor between charge+ and charge-.

2. Measure and confirm voltage across the resistor is 3.1 V ± 0.3 V.

R1 

D1, F1

Items

Check 

Point

Procedure

Check or 

Replace Parts

50

KX-TG8301UAB/KX-TG8301UAJ/KX-TG8301UAT/KX-TG8301UAW/KX-TG8302UAB/KX-TG8302UAT/KX-TGA830RUB/KX-TGA830RUJ/KX-TGA830RUT/KX-TGA830RUW

If your unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT tester
(*1) or not. 

(*1) A general repair is possible even if you don’t have the DECT tester because it is for confirming the levels, such as Acoustic
level in detail.
(*2) Refer to Check Point (Handset) (P.50)

Please follow the items below when BBIC or EEPROM is replaced.

After the measuring, suck up the solder of TP.
*: PC Setting (P.66) is required beforehand.
The connections of adjustment equipment are as shown in Adjustment Standard (Handset) (P.68).

Items

Check 

Point

Procedure

Check or 

Replace Parts

(A)* 1.8 V Supply Adjustment

VDD1

1. Confirm that the voltage between test point VDD1 and GND is 1.8 V ± 0.02 V.
2. Execute the command “VDD”, then check the current value.
3. Adjust the 1.8V voltage of VDD1 executing command “VDD XX“(XX is the

value).

IC1, Q2, C48, 

D1, C1, C44, 

R12, C3, R45, 

C40, C45, F1, 

L8

(B)*

BBIC Confirmation

-

1. BBIC Confirmation (Execute the command “getchk”).
2. Confirm the returned checksum value.

Connection of checksum value and program number is shown below.

IC1, X1, RA61, 

R64, R66

(C)* EEP-ROM Confirmation

-

1. EEP-ROM Confirmation (Execute the command “ChkTGA830XXrevYY.bat”).

XX: country code
YY: revision number

2. Confirm the returned checksum value.

“XX”, “YY”, and “checksum” vary depending on the country version. You can find
them in the batch file, PQZZ- mentioned in JIG and PC (P.66).

IC1, IC3, 

R40~R42, 

C172

(D) Charge Control Check & 

Charge Current Monitor 

Check

-

1. Apply 3.5 V between CHG(+) and CHG(-) with DC power supply and set cur-

rent limit to 250 mA.
Confirm the indication of “charging” on LCD.

2. Confirm that the current limit LED of DC power supply is ON/OFF.

Confirm it after waiting over 1 minute at least.

3. Decrease current limit of DC power supply to 100 mA.
4. 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, Q4 Q9, 

D7, D8, L4, L5, 

R6, R7, F1, 

C1, C3, R2, 

R30, R31, R8, 

C147, R45, 

C15

(E)* Charge Detection (OFF) 

Check

-

1. Stop supplying 3.5 V to CHG (+) and CHG (-).
2. Confirm the indication of “charging” has been cleared.

IC1, Q4 Q9, 

D7, D8, L4, L5, 

R6, R7, F1, 

C1, C3, R2, 

R30, R31, R8, 

C147, R45, 

C15, L8

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KX-TG8301UAB/KX-TG8301UAJ/KX-TG8301UAT/KX-TG8301UAW/KX-TG8302UAB/KX-TG8302UAT/KX-TGA830RUB/KX-TGA830RUJ/KX-TGA830RUT/KX-TGA830RUW

(F)* Battery Monitor Check

-

1. Apply 2.25 V between BATT+ and BATT-.
2. Execute the command 

sendchar PAD
sendchar LED 0
sendchar CRX 0 1
sendchar AD1
It assumes that the return value is XX.
a)  6c   XX   71: No need to adjust
b) XX: 6A ~ 6B: Need to adjust
XX: 72 ~ 74: Need to adjust
Write AD value of 2.25 V to EEPROM.
ex) read data: XX = 6A, write data: YY = 6A
read data: XX = 73, write data: YY = 73
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 - C

No Voltage writing data limit is ‘00’.
c) XX: 00 ~ 69: Reject
XX: 75 ~ FF: Reject

IC1, F1, C1 

C3, R12

, R45

(G)

Battery Low Confirma-

tion

-

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

IC1, F1, C1 

C3, R12

, R45

(H)* BBIC Clock Adjustment

CLK

1. Apply 2.6 V between BATT+ and BATT- with DC power.
2. Input Command “sendchar sfr”, then you can confirm the current value.
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 “sendchar sfr xx xx (where xx is the value)” so that the
reading of the frequency counter is 10.368000 MHz ± 5 Hz.

Note:

Clear the registered information for Base Unit before measurement, because the
Frequency will not possibly get stable due to the registered information.
Pressing the button of “3” “7” “9” “#” clears the registeration.
Register to it on Base Unit after measurement. 

IC1, X1, C47

 

(I)* 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 “sendchar TST 01 02 03 04 05".
3. Initiate connection from DECT tester.
4. Confirm that the NTP value at ANT is 19 dBm ~ 25 dBm.

IC1, 

C808~C814, 

L802~L804, 

C825, C834, 

C819, IC801, 

R107, R108, 

C117, C118, 

C841, C125, 

C842, DA1, 

C801~C804, 

D801,D802, 

C837, C826, 
C822, C820, 
C832, C833, 

R801~R807

(J)* Modulation Check and 

Adjustment

-

Follow steps 1 to 3 of (K).

4.Confirm that the B-Field Modulation is -370±30/ +370±30 kHz/div & Modulated
width   690 kHz using data type Fig 31.

IC1, 

C808~C814, 

L802~L804, 

C825, C834, 

C819, IC801, 

R107, R108, 

C117, C118, 

C841, C125, 

C842, DA1, 

C801~C804, 

D801,D802, 

C837, C826, 
C822, C820, 
C832, C833, 

R801~R807

Items

Check 

Point

Procedure

Check or 

Replace Parts

52

KX-TG8301UAB/KX-TG8301UAJ/KX-TG8301UAT/KX-TG8301UAW/KX-TG8302UAB/KX-TG8302UAT/KX-TGA830RUB/KX-TGA830RUJ/KX-TGA830RUT/KX-TGA830RUW

(K)* Frequency Offset Confir-

mation

-

Follow steps 1 to 3 of (I).

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

IC1, 

C808~C814, 

L802~L804, 

C825, C834, 

C819, IC801, 

R107, R108, 

C117, C118, 

C841, C125, 

C842, DA1, 

C801~C804, 

D801,D802, 

C837, C826, 
C822, C820, 
C832, C833, 

R801~R807

(L)* Frequency Drift Confir-

mation

-

Follow steps 1 to 3 of (I).

4.Confirm that the frequency Drift is < ± 35 kHz/ms.

IC1, 

C808~C814, 

L802~L804, 

C825, C834, 

C819, IC801, 

R107, R108, 

C117, C118, 

C841, C125, 

C842, DA1, 

C801~C804, 

D801,D802, 

C837, C826, 
C822, C820, 
C832, C833, 

R801~R807

(M)*

Sensitivity Receiver 

Confirmation

-

Follow steps 1 to 3 of (I).

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

IC1, 

C808~C814, 

L802~L804, 

C825, C834, 

C819, IC801, 

R107, R108, 

C117, C118, 

C841, C125, 

C842, DA1, 

C801~C804, 

D801,D802, 

C837, C826, 
C822, C820, 
C832, C833, 

R801~R807

(N)* Power RAMP Confirma-

tion

-

Follow steps 1 to 3 of (I).

4.Confirm that Power RAMP is matching.

IC1, 

C808~C814, 

L802~L804, 

C825, C834, 

C819, IC801, 

R107, R108, 

C117, C118, 

C841, C125, 

C842, DA1, 

C801~C804, 

D801,D802, 

C837, C826, 
C822, C820, 
C832, C833, 

R801~R807

(O) Audio Check and Confir-

mation

-

1. Link to BASE which is connected to Line Simulator.
2. Set line voltage to 48 V and line current to 40 mA.
3. Input -45 dBm/1KHz to MIC and measure Line output level.
4. Confirm that the level is -10 dBm ± 2 dBm and that the distortion level is < 5%

at TEL Line (600 

Ω Load).

5. Input -20 dBm/1KHz to Line I/F and measure Receiving level at REV+ and

REV-.

6. Confirm that the level is -21 dBm ± 2 dBm and that the distortion level is < 5%

at Receiver. (vol = 1)

IC1, R23, C12, 

D19, D20, 
C96, C97, 

R215, R27, 

RA4, C11, 

C13, R28, D3, 

D4, L10, L11, 

MIC

Items

Check 

Point

Procedure

Check or 

Replace Parts