HCD-GPX5 - Sony Audio Service Manual (repair manual). Page 18

18

The cold reset clears all data including preset data stored in the
memory to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. In the standby status, press the  

I/

1

  button to turn the power

on.

2. Press three buttons of  

I/

1

 ,

x

(CD), and 

[DSGX]

 simulta-

neously.

3. The set is reset, and become standby status.

Procedure:
1. In the standby status, press the  

I/

1

  button to turn the power

on.

2. Press three buttons of 

[REPEAT]

,

x

(TAPE), and 

[DSGX]

simultaneously.

3. When the common test mode is activated, “SLEEP” and

“PLAY” icons are blink on the fluorescent indicator tube.

Procedure:
1. In the common test mode, if turn the 

[VOLUME]

 knob clock-

wise, it displays “VOL MAX”, and if turn the knob counter-
clockwise, it displays “VOL MIN”.

2. If the 

[TREBLE]

 knobs are turned clockwise or counterclock-

wise, it displays “TONE FLAT”.

3. If the 

[BASS]

 knobs are turned clockwise, it displays “TONE

MAX”, and if turn the knob counterclockwise, it displays
“TONE MIN”.

4. To release from this mode, disconnect the AC plug to turn the

power off.

Procedure:
1. In the common test mode, insert a tape.
2. Input any audio signal from the 

[VIDEO/MD]

 jack (J301) on

the MAIN board.

3. Press the 

[    REC]

 button, and press the 

[            TAPE]

 button

to select the tape direction.

4. Press the 

[    REC]

 button again to start recording.

5. If press the  

m

  (TAPE) or  

M

  (TAPE) button, the tape is

returned to recording start point by cue or review operation,
and starts playback.

6. To release from this mode, disconnect the AC plug to turn the

power off.

Procedure:
1. In the standby status, press the  

I/

1

  button to turn the power

on.

2. Press three buttons of 

[PLAY MODE]

,  

x 

 (TAPE), and 

[DSGX]

simultaneously.

3. When the panel test mode is activated, LEDs and segments of

fluorescent indicator tube are all turned on.

Procedure:
1. In the panel test mode (all LEDs and segments of fluorescent

indicator tube are turned on), press the 

[TUNING MODE]

 but-

ton.

2. Destination indication and model type indication are displayed

on the fluorescent indicator tube alternately.

3. From this status, each time the 

[TUNING MODE]

  button is

pressed, it changes the version display of each module cycli-
cally as follows.

Display

Module

MC

Main controller

GC

Display

CD

CD system

CDD

CD device master

CDMA

CDM upper module

CDMB

CDM lower module

BDA

BD upper module

BDB

BD lower module

ST

Tuner

TA

Amplifier

TM

Timer

TC

Tape

4. To date of any module, press the 

[DSGX]

 button.

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

[PLAY

MODE]

,  

x

  (TAPE), and 

[DSGX]

 simultaneously.

Procedure:
1. In the panel test mode (all LEDs and segments of fluorescent

indicator tube are turned on), press the 

[PLAY MODE]

 button.

2. It displays “K 0 J0 V0” on the fluorescent indicator tube.
3. Each time a button is pressed, “K” value increases. However,

once a button is pressed, it is no longer taken into account.
All keys are pressed, display becomes “K26”.

4. “V” value increases like 1, 2, 3 ... if turn the 

[VOLUME]

 knob

clockwise, or it decreases like 0, 9, 8 ... if turn the knob coun-
terclockwise.
“J” value increases like 1, 2, 3 ... if turn the 

[BASS]

  or

[TREBLE]

  knob clockwise, or it decreases like 0, 9, 8 ... if

turn the knob counterclockwise.

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

[PLAY

MODE]

,  

x

  (TAPE), and 

[DSGX]

 simultaneously.

z

nN

z