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[PANEL TEST MODE]
This mode is used to check the fl uorescent indicator tube, LEDs, 
keys, [VOLUME / DJ CONTROL] jog, model, destination and 
software version.

1.  Press [OPTIONS] button and [FOOTBALL] button simultane-

ously and hold 3 seconds.

2.  All LEDs and segments in fl uorescent indicator tube are light-

ed up. All RGB LEDs are lighted up in white color.

3.  When you want to enter to the software version display mode, 

press [+ / 

] button.

 

The model information appears on the fl uorescent  indicator 
tube.

 

• 

“GNX5” is shown for XXX-GPX555.

 

• 

“GNX8” is shown for XXX-GPX888.

 Press 

[+ / 

] button again to view the destination informa-

tion.

4.  During the destination information display, press [+ / 

] but-

ton. Each time [+ / 

] button is pressed, the fl uorescent indi-

cator tube shows the version of each category software in the 
following sequence: SC, MTK, OPU, UI, PF, SYS, CD, CDMA, 
CDMB, ST, TA, TM, and return back to model information dis-
play.

5. When [] button is pressed while the version numbers 

are being displayed except model and destination, the 
date of the software creation appears. When [] button 
is pressed again, the display returns to the software ver-
sion display.

6. Press 

[- / 

] button, the key check mode is activated.

7.  In the key check mode, the fl uorescent indicator tube displays 

“K 0    V0”.

 

• 

Each time a button is pressed, “K” value increases. 
However, once a button has been pressed, it is no 
longer taken into account.

 

• 

“V” value increases in the manner of 0, 1, 2, 3... if 
[VOLUME] knob is turned clockwise, or it decreases 
in the manner of 0, 9, 8, 7... if [VOLUME] knob is 
turned counterclockwise.

8.  When [ENTER] button is pressed after all LEDs and segments 

in  fl uorescent indicator tube light up, alternate segments in 
fl uorescent indicator tube and LEDs would light up, all RGB 
LEDs would light up in red color. If you press [ENTER] 
button again, another half of alternate segments in fl uorescent 
indicator tube and LEDs would light up, all RGB LEDs would 
light up in green color. Pressing [ENTER] button again would 
cause all segments in fl uorescent indicator tube and LEDs 
light up, all RGB LEDs would light up in blue color. Pressing 
[ENTER] button again would turn off all segments in fl uores-
cent indicator tube and all LEDs including RGB LEDs.

9.  To release from this mode, press the buttons in the same 

manner as step 1, or disconnect the power cord.

[USER RESET]
The user reset clears all data including preset data stored in the data 
fl ash to initial conditions exclude history mode data.

1. Press 

[

\/1

] button to turn on the system.

2. Press 

[] button and [MOVIE/GAME] button simultaneously 

for 3 seconds.

3.  “RESET” appears on the fl uorescent indicator tube. After that, 

the fl uorescent indicator tube becomes blank for a while, and 
the system is reset.

[COLD RESET]
The cold reset clears all data including preset data stored in the 
data fl ash to initial conditions included history mode data. Execute 
this mode when returning the set to the customer.

1. Press 

[

\/1

] button to turn on the system.

2. Press [] button and [PAN] button simultaneously for 3 

seconds.

3.  “COLD RESET” appears on the fl uorescent indicator tube. 

After that, the fl uorescent indicator tube becomes blank for a 
while, and the system is reset.

[CD TRAY LOCK MODE]
This mode let you lock the disc tray. When this mode is activated, 
the disc tray will not open when [OPEN/CLOSE] button is pressed. 
The message “LOCKED” will be displayed on the fl uorescent 
indicator tube. This mode only applied when there is disc(s) on 
the tray.

1. Press 

[

\/1

] button to turn on the system.

2.  Select CD function.
3. Press 

[] button and [BASS BAZUCA] button simultaneously 

and hold down until “LOCKED” or “UNLOCKED” displayed 
on the fl uorescent indicator tube (around 5 seconds).

[HISTORY MODE]
This mode is used to check important data stored in the system 
when PROTECTOR happen.

1.  During demo mode, press [OPTIONS] button and [FLANGER] 

for 5 seconds to mode in to history mode.

2.  Press the [M > 



/ TUNING+] or [



 .m / TUNING-]  

button to check history data stored.

To release from this mode, press [

\/1

] button.

Protect Type Description:

E01

The over current condition to MOSFET occurs 
by defect of MOSFET or defect of PS output 
line.

E03

Defect of power supply circuit to AMP.
There is possibility of unusual power supply of 
any of the AMP IC or Pre-amplifi er.

E04

DC appears in SP terminal by defect of AMP 
IC and MOSFET 
or
Defect of DC FAN and DC FAN driver circuit.

E05

Unusual heat up of MOSFET by improper 
assembly of heat sink, destruction of MOSFET 
etc.

RESET defect

Reset signal status from micom is not ‘H’.

P

R

O

C

O

U

N

T

※ ※

Protector Count

P

R

O

T

Y

P

E

※ ※ ※ ※

Protector Type (refer to Protect Type Description)

T

1

※ ※ ※ ※ ※

H

※ ※

M

Single Power On

T

2

※ ※ ※ ※ ※

H

※ ※

M

Total Power On

F

U

N

C

※ ※ ※ ※ ※ ※ ※

Input Function

V

O

L

※ ※ ※

Volume

A

T

T

※ ※ ※

Actual Attenuation

E

Q

L

O

W

※ ※ ※

Low EQ Level

E

Q

M

I

D

※ ※ ※

Mid EQ Level

E

Q

H

I

G

H

※ ※ ※

High EQ Level

S

W

※ ※ ※

Subwoofer Setting

S

U

R

R

※ ※ ※

Surround Setting

D

J

※ ※ ※ ※ ※ ※

※ ※

DJ Effect Setting

B

A

Z

U

C

A

※ ※ ※

Bass Bazuca Setting

[MODEL & DEST WRITE MODE]
This mode is used to set software model & destination.
This mode only available when no permanent model & destination 
is stored.

1.  Press [MOVIE/GAME] button & [LED PATTERN] button 

simultaneously and hold for 5 seconds.

2.  Fluorescent indicator tube display will show “M XXXXX”.
3. Press 

[

/+] / [-/] button to select the model based on the 

set’s model.

HCD-GPX555

“M GNX5”

HCD-GPX888

“M GNX8”

4.  Press [ENTER] button.
5.  Fluorescent indicator tube display will show “D XXXXX”.
6. Press 

[

/+] / [-/] button to select the destination based 

on the set’s country.

J1

Japan

“D J”

JE1

Tourist

“D JE”

U2/CA2

America, Canada

“D NA”

CEL/CE1/
CE2

Europe(general)

“D CE2”

CEK

U.K.

“D CEK”

RU1/RU3

Russia

“D RU”

AU1

Australia

“D AU”

CN1

China

“D CN”

E12

India, Pakistan, Morocco

“D E12”

E3/E15

Middle East, Iran

“D E3”

E4/ EA3/ 
E93/ SA2

Saudi Arabia, Africa

“D EA3”

HK1/
HK2/PL1/
SP1/SP2/
SP6/TH1

Hong Kong, Philippines, 
Singapore, Malaysia, 
Thailand

“D ASIA”

KR2

Korea

“D KR”

TW2

Taiwan

“D TW”

E2, E32, 
E51, AR2

Latin America(general), 
Chile, Peru, Argentina

“D LATIN”

BR1

Brazil

“D BR”

MX2, 
MX4

Mexico

“D MX”

7.  Press [ENTER] button to confi rm the selection.
8.  “RESET” appears on the fl uorescent indicator tube. After that, 

the fl uorescent indicator tube becomes blank for a while, and 
the system is reset.

9.  Mode in [PANEL TEST MODE] again to confi rm on the 

model & destination.

Note:
1.  CD Block is basically constructed to operate without adjustment.
2.  Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat-

ed.

3.  Use an oscilloscope with more than 10 MΩ impedance.
4.  Clean the object lens by an applicator with neutral detergent when the
 

signal level is low than specifi ed value with the following checks.

5.  Check the focus bias check when optical pick-up block is replaced.

Procedure :
1.  Connect the oscilloscope to JL317 (RF Signal) and JL312 (Vc/

Reference) on the MB board.

2. Press 

the 

[

?/1 

STANDBY] button to turn the power on, and 

press the [CD] button to select CD function.

3.  Set disc (YEDS-18) and press the [u] button to playback.
4. Confi rm that oscilloscope waveform is as shown in the fi gure
 

below (eye pattern).

 

A good eye pattern means that the diamond shape (

) in the

center of the waveform can be clearly distinguished.

Procedure:
1.  Turn the power on.
2.  Input the following signal from Signal Generator to FM an-

tenna input directly.

Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation 

: 75 kHz

Modulation 

: 1 kHz

ANT input 

: 35 dBu (EMF)

Note: 

Please use 75 ohm “coaxial cable” to connect SG and the 
set. You cannot use video cable for checking.

 

  Please use SG whose output impedance is 75 ohm.

3.  Set to FM tuner function and scan the input FM signal with
 automatic 

scanning.

4. Confi rm that input Frequency of A, B and C detected and 

automatic scanning stops.

The stop of automatic scanning means “The station signal is 
received in good condition”.

0 dB = 1 

μV

JL317

JL312