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3 

Note 4: Arrange the battery wire in the crevice between 
 

battery assy (BAT1) and MAIN board. 

Note 5: When installing panel (front) assy, 
 

the position of switch and knob (power)

 

is set and installed.

4 Lift up the MAIN board block 

5 case (front) assy

2 Soldering the black battery wire.

1 Soldering the red battery wire.

Note 2: When removing the battery wire, be sure to remove black 
 

battery wire previously and then to remove red battery wire.

Note 3: When installing the battery wire, be sure to install red battery 
 

wire previously and then to install black battery wire.

1 Remove the solders of black battery wire.

Note 1: When the battery assy (BAT1) is removed, refer to 
 

“ABOUT THE  HANDLING OF THE BATTERY 

 

ASSY (BAT1)” (page 4).

2 Remove the solders of red battery wire.

Note 1: When the battery assy (BAT1) is removed, refer to 
 

“ABOUT THE  HANDLING OF THE BATTERY 

 

ASSY (BAT1)” (page 4).

3 

4 

4 

1 

2 

5 Remove the organic holder (LCD) assy

8 Remove four solders.

9 jack (3P)

0 MAIN board

6 adhesive sheet (OLED)

7 holder (LCD) assy

Note: When replacing MAIN board, refer to “ABOUT THE 

DESTINATION SETTING WHEN REPLACING 
THE MAIN BOARD” on page 3.

Setting the test mode allows you to perform various checks and 
examinations on this unit.

1.  SETTING  THE  TEST  MODE
Setting method:
1.  Slide the [POWER] switch to turn the power on.

2.  Slide the [HOLD] switch to OFF.

3.  Press the [

x

STOP] key, and make this unit into a halt condi-

tion.

4.  While pressing the [

x

STOP] and [VOL –] keys, slide the 

[HOLD] switch to ON.

5.  The test mode menu is displayed, and enter the test mode. Re-

lease the [

x

STOP] and [VOL –] keys.

Displayed characters/values are example.

<SERVICE  MENU>
ICD-TX50/E
1.00.01

2.  RELEASING  THE  TEST  MODE
Press the [RESET] key on rear side of main unit, reboot this unit.

[

.

] key

[

>

] key

SERVICE MENU

VERSION

KEY CHECK

AUDIO LOOP

SIN

BEEP

LCD CONT

LCD LOW CONT

LCD PATTERN

RTC TEST

BATT A/D

LOW DET

VBUS

KEY COUNT

SLEEP

BATT LIFE

WRITER VER

CHG LOG

LREC LOG

LREC LOG Clear

MENU INIT

SERVICE MENU

J

j

k

K

‡

‡

‡

‡

Normal mode

Slide the [HOLD] switch to OFF.

Press the [

x

STOP] key.

While pressing the [

x

STOP] and [VOL –] keys, 

slide the [HOLD] switch to ON.

Release the [

x

STOP] and [VOL –] keys.

Press the [RESET] key on rear side of main unit.

Initial state of test mode

End of test mode

Determine

using

[

N

/ENT]

key

Return using

[

x

STOP

] key

4.  OPERATION  OF  THE  TEST  MODE
4-1. VERSION
Model name, destination, fi rmware version, IPL2 version, CPU 
version, initial language, charge function, card function, radio 
function, eMMC maker code and eMMC capacity can be con-
fi rmed.

Procedure:
1.  Enter the test mode.
2.  Press the [

>

] or [

.

] keys to select the “VERSION”, and 

press the [

N

/ENT] key.

3.  Model name, destination, fi rmware version, IPL2 version and 

CPU version are displayed on page 1/2 of LCD display. Press 
the [

>

] or [

.

] keys, initial language, charge function, 

card function, radio function, eMMC maker code and eMMC 
capacity are displayed on page 2/2 of LCD display.

Displayed characters/values are example.

ICD-TX50/E
MAIN:1.00.00
IPL2:1.00.00  LSI 4252

Displayed characters/values are example.

ICD-TX50/E
L:02  C1M1R0
D:15  M:04

 

C/M/R : 1 = function exists

 

 

0 = function non-exists

Releasing method:
Press the [

x

STOP] key, return to test mode menu.

4-2.  KEY  CHECK
Operation of keys and switches can be checked, and this unit can 
return to the factory shipment settings.

Note 1: It cannot move to other modes from this mode.

Procedure:
1.  Enter the test mode.
2.  Press the [

>

] or [

.

] keys to select the “KEY CHECK”, 

and press the [

N

/ENT] key.

3.  Whenever any keys of this unit are pressed or any switches of 

this unit are slid, the button count decreases.

Displayed characters/values are example.

<KEY  CHECK>

KEY:FF
REMAIN:  12

 

[

x

STOP], [>], [.], [

N

/ENT], [

z

REC/PAUSE], 

[VOL +], [VOL –], [T-MARK], [

z 

BACK, 

 HOME]

 

[HOLD] (ON, OFF), [POWER] (ON, OFF)

4.  After all the keys and switches are decided, initialization is 

performed.

5.  “Success” is displayed, and this unit reboots.

Note 2: This unit is not initialized when “Failure” is displayed.

Releasing method:
Press the [RESET] key on rear side of main unit, reboot this unit.

4-3.  AUDIO  LOOP
Audio loop back operation can be performed.

Procedure:
1.  Enter the test mode.
2. Press the [

>

] or [

.

] keys to select the “AUDIO LOOP”, 

and press the [

N

/ENT] key.

3.  Audio loop back operation is performed.

Note: When mode is active, the recording level for VOR is acquired at 

intervals of 1 second, and it is displayed. When the acquired record-
ing level is larger than the VOR setting value, red LED lights up.

 

(Threshold value is based on operation of this unit)

Displayed characters/values are example.

<AUDIO  LOOP>

Vol:25  MIC:H  AGC:ON
H0  D1  VOR:006214E8

 

 

Play back volume 

: 25 (stereo)

 

fs 

: 44.1 kHz

 

Microphone sensitivity  : H

 HP_MUTE 

: 

L

 DAMP_SEL 

: 

H

 

Sound is outputted from the D-AMP built-in CPU at the time 
of headphone wearing.

 

 

[VOL +] 

: Volume up

 

[VOL –] 

: Volume down

 

[

z

REC/PAUSE] 

: Microphone sensitivity change 

 

 

  (H → L → M → H...)

 

[

.

] 

: AGC operation (ON ↔ OFF)

 

[

z 

BACK, 

 HOME] : HP_MUTE forcible operation

 

 

  Only HP_MUTE is changed with a 

 

 

  play back state held (ON ↔ OFF).

 

[T-MARK] 

: DAMP_SEL forcible operation

 

 

  Only DAMP_SEL is changed with

 

 

  a play back state held (ON ↔ OFF).

Operation of others by the plug/unplug signal (headphone jack) are 
based on operation of this unit.

Releasing method:
Press the [

x

STOP] key, return to test mode menu.