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RB  flexible flat cable (16 core)
 (CN301)

RT CD board

RE  optical pick-up block
 (KSM-213D)

The cold reset clears all data including preset data stored in the 
RAM to initial conditions. Execute this mode when returning the 
set to the customer.
Procedure:
1.  Press three buttons of [

x

], [

u

] and [GROOVE] simultane-

ously.

2.  The message “COLD RESET” is displayed on the fl uorescent 

indicator tube momentarily, then becomes standby states.

A step of AM tuning interval can be changed over between 9 kHz
and 10 kHz.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press the [TUNER/BAND] button to select “AM”.
3.  Press the [

?/1

] button to turn the power off.

4.  Press two buttons of [TUNING +] and [

?/1

] simultaneously.

5.  The message “AM 9K STEP” or “AM 10K STEP” is displayed 

on the fl uorescent indicator tube, and thus the tuning interval is 
changed over.

This mode moves the optical pick-up to the position durable to 
vibration. Use this mode when returning the set to the customer 
after repair.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press the [CD] button to select “CD”.
3.  Press two buttons of [

u

] and [

?/1

] simultaneously.

4.  The message “LOCK” is displayed on the fl uorescent indicator 

tube, and the CD ship mode is set.

This mode is used to perform CD ship (lock) mode and cold reset 
simultaneously.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press the [CD] button to select “CD”.
3.  Press three buttons of [

x

], [ILLUMINATION] and [

?/1

] si-

multaneously.

4.  The message “COLD RESET” is displayed on the fl uorescent 

indicator tube momentarily, then becomes standby states.

This mode is used to unable to take sample disc out of disc table 
in the shop.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press the [CD] button to select “CD”.
3.  Insert a disc.
4.  Press two buttons of [

x

] and [

Z

] for 5 seconds.

5.  The message “LOCKED” is displayed on the fl uorescent in-

dicator tube and the disc table is locked. (Even if pressing the 
[

Z

] button, the message “LOCKED” is displayed on the fl uo-

rescent indicator tube and the disc table is locked)

6.  To release this mode, press two buttons of [

x

] and [

Z

] for 5 

seconds.

7.  The message “UNLOCKED” is displayed on the fl uorescent 

indicator tube and the disc table is unlocked.

This mode is used to display the parameter of amplifi er IC and
display the VACS status.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press three buttons of [

x

], [

u

] and [USB] simultaneously.

3.  When the AMP test mode is activated, the message “AMP 

TEST IN” is displayed on the fl uorescent indicator tube mo-
mentarily, then amplifi er adjustment mode is displayed on the 
fl uorescent indicator tube.

4.  Press the [TAPE REC PAUSE/START] button to changed over 

between VACS status display mode and the amplifi er IC pa-
rameter display mode.

5.  In this mode, press the [GROOVE] button to changed over 

DBFB on/off, and “DBFB ON” or “DBFB OFF” is displayed 
on the fl uorescent indicator tube.

6.  In this mode, press the [SURROUND] button to changed over 

surround on/off, and “SURROUND ON” or “SURROUND 
OFF” is displayed on the fl uorescent indicator tube.

− For GT220/GT440 −
7.  In this mode, press the [EQ BAND] button to enter the equal-

izer adjustment mode.

 

In the equalizer adjustment mode, press the [EQ BAND] but-
ton to change over the adjustment band as LOW/MID/HIGH. 
And turn the [OPERATION DIAL] knob to adjust the equal-
izer level of each bands.

− For GT660 −
7.  In this mode, press the [BASS], [VOCAL] or [GUITAR] but-

ton to enter the parametric equalizer adjustment mode.

 

In the parametric equalizer adjustment mode, press the [BASS], 
[VOCAL] and [GUITAR] button to change over the adjust-
ment band. And press the [BASS], [VOCAL] or [GUITAR] 
button to change over the equalizer frequency of each bands, 
or press the [+] and [

−] buttons to adjust the equalizer level of 

each bands.

8.  To release the amplifi er IC parameter display mode or equal-

izer adjustment mode, press the [

?/1

] button to the power off.

This mode is used to check operations of microprocessor.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press three buttons of [

x

], [

u

] and [AUDIO] simultaneous-

ly.

3.  When the MC test mode is activated, VACS level is displayed 

on the fl uorescent indicator tube momentarily.

4.  Press the [TUNING +] button, the message “ALL EQ MAX” 

is displayed on the fl uorescent indicator tube momentarily and 
press the [TUNING 

−] button, the message “ALL EQ MIN” is 

displayed on the fl uorescent indicator tube momentarily.

5.  Press the [ENTER] button, the message “ALL EQ FLAT” is 

displayed on the fl uorescent indicator tube momentarily.

6.  Turn the [VOLUME] knob clockwise, the message “VOL-

UME MAX” is displayed on the fl uorescent indicator tube 
momentarily and turn the [VOLUME] knob counterclockwise, 
the message “VOLUME MIN” is displayed on the fl uorescent 
indicator tube momentarily.

7.  Press the [TAPE REC PAUSE/START] button to changed over 

VACS on/off.

8.  Press the [

?/1

] button to release from this mode, then cold 

reset is performed.

This mode is used to check the model, destination and software
version.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press three buttons of [

x

], [

u

] and [ILLUMINATION] si-

multaneously.

3.  When this mode is activated, model type and destination (*1) 

are displayed on the fl uorescent indicator tube.

*1) GT220, GT440 or GT660
Example: GT660 ASIA2
4.  Press the [TAPE REC PAUSE/START] button to display the 

software version (*2) and year, month, day of the software cre-
ation.

*2) G**.***  : The version of system controller (IC901 on the 

MAIN board).

 

M**.***  :  The version of USB control module in the sysytem 

controller.

 

U**.***  : The version of USB controller (IC901 on the USB 

board).

5.  To release this mode, press three buttons of [

x

], [

u

] and 

 [ILLUMINATIOM] 

simultaneously.

This mode can be used for error code display of CD section.
Procedure:
1.  Press the [

?/1

] button to turn the power on.

2.  Press the [CD] button to select “CD”.
3.  Press three buttons of [

x

], [CD] and [SURROUND] simulta-

neously.

4.  When this mode is activated, mechanism deck error code is 

displayed on the fl uorescent indicator tube.

5.  Press the [ENTER] button to changed over between optical 

pick-up error code display mode and mechanism deck error 
code mode.

Note: There are two [ENTER] buttons on the HCD-GT660, but it works in 

the same way whichever button is pressed.

6.  Press the [TUNING +]/[TUNING 

−] button to change over 

display of error history number.

7.  To release this mode, press the [

?/1

] button to turn the power 

off.

1.  Mechanism Deck Error Code Mode
When this mode is entered, mechanism deck error code is displayed 
with the 10-character format on the fl uorescent indicator tube.

The fi rst digit from the left indicates:
The fi rst digit from the left indicates which mode the error history 
is. In the mechanism deck error code mode, “M” is displayed on 
the fl uorescent indicator tube.

The second digit from the left indicates:
(Error history number display)
The second digit from the left indicates which order the error his-
tory is. “0” indicates the latest error history, and each time the 
number increases by one, the error history goes back to one-previ-
ous error.

The third and 4th digit from the left indicates:
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.

0

0

No error

0

8

Table operation time-out (Table does not move to 
the target position within the specifi ed time)

1

6

In the chucking down operation, the operation was 
retried by the maximum number of times but the 
operation could not be completed

1

7

In the chucking up and down operation, the reverse 
recovery processing was attempted but it could not 
be recovered

1

8

In the chucking up operation, the operation was 
retried by the maximum number of times but the 
operation could not be completed

2

0

Loading operation time-out (Table does not move to 
the target position within the specifi ed time)

2

2

As the chuck was in the ex-open status at the initial-
ization, the closing was attempted but could not be 
completed

The 5th and 6th digit from the left indicates:
(Present status display)
The 5th and 6th digit from the left indicates which operating status 
when an error occurred is indicated.

0

1

Open completion status

0

2

From open status, the movement to chucking down 
position is under way

0

3

From chucking down position, the open operation is 
under way

0

4

Chucking down completion status

1

0

The chucking down operation is under way

1

1

The chucking up operation is under way

1

2

Close completion status

1

3

From close status, the ex-open operation is under 
way

1

4

From ex-open status, the close operation is under 
way

1

8

Ex-open completion status

The 7th and 8th digit from the left indicates:
(Motor status display)
The 7th and 8th digit from the left indicates which motor output
status when an error occurred is indicated.

×

0

No table motor output

×

1

Table motor forward output

×

2

Table motor backward output

×

3

Table motor break output

0

×

No loading motor output

1

×

Loading motor forward output

2

×

Loading motor backward output

3

×

Loading motor break output