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53

When connecting the simulator equipment for checking, please refer to below.

Note:
(A) - (R) is referred to Check Point (Handset) (P.38)

+

–

ANT- Short

ANT- Short- GND

RECEIVER

SP-PHONE_SPEAKER

ANT1_TP

JTAG

C801

C70

C71

D21

D22

D14

D13

C73

C72

C69

CP2.8V

X1

C1

CP3V

CKM

KIN_4

KIN_2

KIN_3

1.8V

KIN_1

STB_D

POWER

STB_B

STB_C

STB_A

CP4V

KEY_LED

Q1

R1

R76

R77

C78

C79

C41

R41

R15

RA3

RA2

Q6

C866

CHG_CTRL

Q9

R6

Q4

Q2

C19

R2

R9

R8

Q3

C6

F1

C15

R45

C7

BATT+

UTX

GND

URX

VBAT

BATT-

CHG

CHG

A

C5

R3

R7

C859

C861

C860

C46

C45 RST

R61

C44

R60

RA5

C862

R20

C47

C43

C13

C11

R23

RA7

C12 C22

C36

C191

C190

C98

C59

C99

C30

C29

D3

C40

STM

C56

C55

C52

C53

C51

+

–

GREEN

ORANGE

+

–

BLUE

ORANGE

PbF

PNLB2161Z

Oscilloscope

AF V

olt

 Meter

3

4

8

56

1F

56

(N)
(O)

CP3.0V

(P)

CP2.8V

Orange

Orange

Blue

Green

(R)

CP4V

2.7 V

Zener

DC P

o

w

e

r

2.

3

0 - 2.60 V

AF

Generator

MIC-

MIC+

+

+

(N)

F

requency

Counter

CKM

Jig

22pF

100

(H)

(Q)

(A)
(B)(C)(F)
(H)(I)

RX

TX

GND

PC

DC P

o

w

e

r

5.0V

CHG+

CHG-

(D)
(E)

GND

DC PO

WER

2.00 - 2.25 V

(at batter

y

 lo

w)

P

o

w

er k

e

y

(F)
(G)

VDD
1.8V

CMD T

ester

CMD60

(I)(J)(K)(L)
(M)

(A)

Connect betw

een ANT

-Shor

t and ANT

-Shor

t GND

.

54

If repairing or replacing BBIC (FLASH type), EEPROM and X'tal, it is necessary to download the required data such as
Programming data or adjustment data, etc in memory.
The set doesn't operate if it is not executed.

First, operate the PC setting according to The Setting Method of JIG (Base Unit)(P.48).
Then download the appropriate data according to the following procedures.

(*1) WW: country code, XXX_YYY: revision number 
“XXX_YYY” vary depending on the country version. You can find them in the batch file, PNZZ- mentioned in The Setting
Method of JIG (Base Unit) (P.48).
(*2) Refer to Check Point (Base Unit) (P.36)

Items

How to download/Required adjustment

EEPROM (IC611)

Adjusted parameter data is stored in memory.
(country version batch file, default batch file,
etc.)

1) Change the address “0001” of EEPROM to “55” to download 
the data.
2) Default batch file: Execute the command “default.bat”.
3) Country version batch file: Execute the command 
“TG7851EU_WW_RevXXX_YYY.bat” (KX-TG7851) or 
“TG7861EU_WW_RevXXX_YYY.bat” (KX-TG7861) (*1)
4) Clock adjustment: Refer to Check Point (E). (*2)

X'tal (X501)

System clock

Clock adjustment data is in EEPROM, adjust the data again
after replacing it.
1) Apply 5.5V between DCP ad DCM with DC power.
2) Input Command "sendchar sfr", then you can confirm the cur-
rent value.
3) Check X'tal Frequency.(10.368 MHz ± 100 Hz).
4) If the frequency is not 10.368 MHz ± 100 Hz, adjust the fre-
quency of CKM executing the command "sendchar sfr xx xx
(where xx is the value)" so that the reding of the frequency
counter is 10.368 MHz ± 5 Hz. 

55

First, operate the PC setting according to The Setting Method of JIG (Handset)(P.51).
Then download the appropriate data according to the following procedures.

(*3) WW: country code, XXX_YYY: revision number
“XXX_YYY” vary depending on the country version. You can find them in the batch file, PNZZ- mentioned in The Setting
Method of JIG (Handset) (P.51).

(*4) Refer to Check Point (Handset) (P.38)

Items

How to download/Required adjustment

FLASH(IC4)

Programming data is stored in memory.

1) Make sure to connect the JIG cable, then disconnect the DC
Power in order to download the data.
2) Execute the command “flw441 *********.hex”.
3) Connect the DC Power.
4) Press and hold the handset Power key.
5) While holding down the handset Power key, press the PC
Enter key once.
6) After a few minutes, “Successful upgrade” is displayed  on
the PC indicating downloading has finished.
7) Detach the JIG cable, then press the handset Power key to
turn it on.
8) Connect the JIG cable again, and execute the command
"getchk”, then confirm the checksum value is correct.

• If the downloading fails, start again from step 1).

9) Default batch file: Execute the command “default.bat”.
10) Default batch file (remaining): Execute the command
“TGA785RU_DEF_RevXXX_YYY.bat”. (*3).
11) Country version batch file: Execute the command
“TGA785RU_WW_RevXXX_YYY.bat”. (*3).
12) Clock adjustment: Refer to Check Point (H). (*4).
13) 1.8 V setting and battery low detection: Refer to Check
Point (A), (F) and (G). (*4).

EEPROM (IC3)

Adjusted parameter data is stored in memory.
(country version batch file, default batch file,
etc.)

1) Change the address “0001” of EEPROM to “22” to download 
the data.
2) Default batch file: Execute the command “default.bat”.
3) Default batch file (remaining): Execute the command 
“TGA785RU_DEF_RevXXX_YYY.bat”. (*3)
4) Country version batch file: Execute the command 
“TGA785RU_WW_RevXXX_YYY.bat”. (*3)
5) Clock adjustment: Refer to Check Point (H). (*4)
6) 1.8 V setting and battery low detection: Refer to Check Point 
(A), (F) and (G). (*4)

X'tal (X1)

System clock

Clock adjustment data is in EEPROM, adjust the data again
after replacing it.
1) Refer to Check Point (C). (*4)

56

*: Refer to Check Point (Base Unit) (P.36)

**: Refer to Check Point (Handset) (P.38)

Item

Value

Refer to -. *

TX Power

18.5 dBm ~ 25 dBm

Check Point (Base Unit) (J)

Modulation

-350 ± 50/+350 ± 50 kHz/div

Check Point (Base Unit) (K)

Frequency Offset

<±20 kHz

Check Point (Base Unit) (L)

RX Sensitivity

< 1000 ppm

Check Point (Base Unit) (M)

Power RAMP

Power RAMP is matching

Check Point (Base Unit) (N)

Item

Value

Refer to -. **

TX Power

19 dBm ~ 25 dBm

Check Point (Handset) (I)

Modulation

-350 ± 50/+350 ± 50 kHz/div 

Check Point (Handset) (J)

Frequency Offset

<±20 kHz

Check Point (Handset) (K)

RX Sensitivity

< 1000 ppm

Check Point (Handset) (L)

Power RAMP

Power RAMP is matching

Check Point (Handset) (M)