KX-TG8061RUB, KX-TG8061UAB, KX-TG8061CAB, KX-TGA806RUB (serv.man3) - Panasonic Telephone Service Manual Supplement (repair manual). Page 8

8

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

After the measuring, suck up the solder of TP.
*:  Connections is required beforehand.
The connections of adjustment equipment are as shown in Adjustment Standard (Handset) (P.11).

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, C44,  

C344, C40, 

C45, F1, C10, 

C2, C34, R7

(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 "sendchar EPV").
2. Confirm the returned Value. (Value for reference is written at "EEPROM C/

SUM” in Software_Version_Table.xls).

IC1, IC3, 

RA40, C172

(D) Charge Control Check & 

Charge Current Monitor 

Check

-

1. Apply 5.0 V between CHG(+) and CHG(-) with DC power supply and set

current limit to 150 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.

(If charge control cannot be confirmed by this procedure, please use battery to
handset power supply and try again.)

IC1, Q4 Q9, 
Q5, Q6, R9, 

R4, R5, R33, 

C19, F1, C1, 

R30, R31, R8, 

R45

(E)* Charge Detection (OFF) 

Check

-

1. Stop supplying 5.0 V to CHG (+) and CHG (-).
2. Confirm the indication of “charging” has been cleared.

IC1, Q4 Q9, 
Q5, Q6, R9, 

R4, R5, R33, 

C19, F1, C1, 

R30, R31, R8, 

R45

(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 = 0009(Low Voltage) write “YY”
Execute the command “wreeprom 00 09 01 YY”.
EEPROM = 000A(No Voltage) write “YY -C"
Execute the command “wreeprom 00 0A 01 ZZ”.

ZZ = YY - C

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

IC1, F1, C1, 

R45

(G)

Battery Low 

Confirmation

-

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, 

R45

checksum value

program number

ex.)

57AC

DCK2RN