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The service modes can be activated by pressing various button combination on the player and remote control unit.
Below is the summary of major checking:

Player buttons

Remote control unit buttons

Application

Note

STOP

0

Error code check

(Refer to the section
“9.2.1. Service Mode
Table 1” for more
information).

1

ADSC internal RAM data check

5

Jitter checking

FUNCTIONS

DVD laser drive current check

PAUSE

Initial setting of laser drive current.

3

CD laser drive current check

(Refer to the section
“9.2.2. Service Mode
Table 2” for more
information).

6

Region display and mode

7

Micro-processor firmware version check

8

DVD (HDMI) module firmware version check.
Initialization of the player (factory setting is restored.)
Used after replacement of micro-computer, FLASH ROM IC,
EEPROM and DVD (HDMI) module.

MENU

Communication error display

ENTER

DVD (HDMI) Module reset

(Refer to the section
“9.2.3. Service Mode
Table 3“ for more
information).

Timer 1 check

Timer 1 reset

Timer 2 check

Timer 2 reset

PAUSE

Writing of laser drive current value after replacement of optical
pickup (Do use this function only when optical pickup is
replaced.)

(Refer to the section
“9.2.4. Optical Pick-up
Self-Diagnosis” for more
information).

By pressing various button combinations on the player and remote control unit can activate the various service modes for checking.
Special Note:

Due to the limitations of the no. characters that can be shown on FL Display, the “FL Display” button on the remote control unit
is used to show the following page. (Display 1/Display 2).

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FL Display

Key Operation

Front Key

Item

Jitter check mode

To exit, press STOP or PLAY 
button.

Jitter check

Description

Mode Name

Initial setting 

of laser drive 

current

DVD laser 

drive current 

measurement

ADSC internal 

RAM data 

check

Error code 

check

Cancelled automatically 
5 seconds later.
To exit, press [POWER]
button on main unit or 
remote control.

Press "FL Display" on 
remote control unit for next
page (FL Display) on values
of laser drive current.

Press "FL Display" on 
remote control unit for next
page (FL Display) on values
of dvd drive current. 

Cancelled automatically 
5 seconds later.

Cancelled automatically 
5 seconds later.

Press STOP or OPEN  
button to exit.

In STOP (no disc) mode, 
press STOP button on the 
player, and "5" button on 
the remote control unit.

Jitter check
Jitter rate is measured and displayed.  
Measurement is repeatedly done in 
the cycle of one second.  Read error 
counter starts from zero upon mode 
setting.  When target block data failed 
to be read out, the counter advances 
by one increment.  When the failure is 
caused by minor error, it may be 
corrected when retried to enable 
successful reading.  In this case, the 
counter advances by one.  When the 
error persists even after retry, the 
counter may jump by two or more.

Jitter rate is shown in decimal notation to 
one place of decimal.
Focus drive value is shown in hexadecimal 
notation.

In STOP (no disc) mode, 
press STOP button on the 
player, and "0" button on the 
remote control unit. * With 
pointing of cursor up and 
down on display.

Error code check
The latest error code stored in the 
EEPROM IC is displayed.

In STOP (no disc) mode, 
press STOP button on the 
player, and PAUSE button 
on the remote control unit.

Initial setting of laser drive current. 
Initial current value for each of DVD 
laser and CD laser is separately saved 
in the EEPROM IC.

In STOP (no disc) mode, 
press STOP button on the 
player, and FUNCTIONS 
button on the remote 
control unit.

DVD laser drive current measurement
·DVD laser drive current is measured 
and the result is displayed together 
with the initial value stored in the 
EEPROM IC.
After the measurement, DVD laser 
emission is kept on.  It is turned off 
when POWER key is switched off.  (It 
is also turned off when POWER button 
on the player is switched off.)

In STOP (no disc) mode, 
press STOP button on the 
player, and "1" button on 
the remote control unit.

ADSC internal RAM data check
·ADSC internal RAM data is read out 
and displayed.

Jitter rate

Press "FL Display" on 
remote control unit for next
page (FL Display).

Error code (play_err) is expressed in the 
following convention.
Error code = 0 x DAXX is expressed: 

DVDnn UXX

Error code = 0 x DBXX is expressed: 

DVDnn HXX

Error code = 0 x DXXX is expressed: 

DVDnn FXXX

Error code = 0 x 0000 is expressed: 

DVDnn F---

* "xx" denotes the error code

The value denotes the current in decimal 
notation. The below example shows the 
initial current is 23mA and 19mA for CD 
laser and DVD laser respectively when the 
laser is switched on.

Laser current
measurement 
mode

DVD laser current 
measurement mode

The value denotes the current in decimal 
notation.  
The below example shows the initial current 
is 19mA and the measured value is 19mA.

RAM data for 
specified address

Address

The value is shown in hexadecimal 
notation.  The above example shows the 
data in ADSC address FB0h is F7FFh.

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Micro-processor firmware version
display & EEPROM checksum display.
EEPROM checksum is only available
due to existence of EEPROM IC.
(NO: NO EEPROM IC)

Micro-processor
firmware version
display & 
EEPROM 
checksum 
display.

Initialization

Cancelled automatically 
5 seconds later.

Cancelled automatically 
5 seconds later.

In STOP (no disc) 
mode, press STOP button 
on the player, and "7" 
button on the remote 
control unit.

In STOP (no disc) 
mode, press STOP button 
on the player , and 

10 

button on the remote 
control unit.

Initialization
User settings are cancelled and player 
is initialized to factory setting.

Press "FL Display" button on 
remote control unit for next
page. (FL Display)

FL Display

Key Operation

Front Key

Item

Description

Mode Name

Cancelled automatically 
5 seconds later.

Cancelled automatically 
5 seconds later.

DVD (HDMI) module firmware version is 
displayed on the FL Display.

Region display & mode

DVD (HDMI)
module 
firmware
version display

Region display

In STOP (no disc) 
mode, press STOP button 
on the player, and "6" 
button on the remote 
control unit.

In STOP (no disc) 
mode, press STOP button 
on the player, and "8" 
button on the remote 
control unit.

Cancelled automatically 
5 seconds later.

Displays frequency of communication 
errors between system control IC and 
mechanism control IC during DVD 
module.

Communication

error display

In STOP (no disc) 
mode, press STOP button 
on the player, and "MENU" 
button on the remote 
control unit.

If EEPROM IC is present, the checksum
value will be displayed. It displays as 
"NG" if the EEPROM IC installed is not 
working properly.

The firmware version can be updated
using recovery disc.

Region No.

N: no PAL / P: PAL

N: NTSC / 6: PAL60

Panel 
controller 
jumper 
information

Existence of
EEPROM 

System controller 
generation

Region

Destination

System 
controller 
version

Press "FL Display" on 
remote control unit for next
page. (FL Display)

Cancelled automatically 
5 seconds later.

CD laser drive 

current 

measurement

In STOP (no disc) mode, 
press STOP button on the 
player, and "3" button on 
the remote control unit.

CD laser drive current measurement
CD laser drive current is measured 
and the result is displayed together 
with the initial value stored in the 
EEPROM IC.
After the measurement, CD laser 
emission is kept on.  It is turned off 
when POWER key is switched off.  (It 
is also turned off when POWER button 
on the player is switched off.)

CD laser current 
measurement mode

The value denotes the current in decimal 
notation.  
The below example shows the initial current 
is 23mA and the measured value is 23mA.

Display 1

Display 2

Display 3

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