Sony HCD-GT22, Service Manual

Page: 18 / 98

18
HCD-GT22/GT44/GT55
PANEL TEST MODE
This mode is used to check the fluorescent indicator tube, LEDs, phones jack, keys and control knobs.
Procedure:
1. Press the
I / 1
button to turn the power on.
2. Press three buttons of
x
,
[SURROUND]
and
[TUNER]
simultaneously.
3. All segments on the fluorescent indicator tube and all LEDs light up.
4. Press two buttons of
[ILLUMINATUION]
and
[ENTER]
simultaneously to enter the key routes check mode.
5. In this mode, each time any button is pressed, it displays key route and key number of the button. (Refer to following table)
Example:
[DISPLAY]
button : “KEY 10000”
[TUNER/BAND]
button : “KEY 40000”
[ILLUMINATION]
button : “KEY 01000”
[CD-TAPE SYNC]
button : “KEY 00070”
6. Press two buttons of [ILLUMINATUION] and [ENTER] simultaneously to enter the key check mode.
7. In this mode, each time any button is pressed, “KEYCONT” value increases. However, once a button is pressed, it is no longer
taken into account. (Maximum numbers are GT22: 29, GT44: 30, GT55: 39)
8. Press two buttons of
[ILLUMINATUION]
and
[ENTER]
simultaneously to enter the phones jack check mode.
9. In this mode, “H_P ON” is displayed when phones jack is inserted, and “H_P OFF” is displayed when phones jack is pulled out.
10. Press two buttons of
[ILLUMINATUION]
and
[ENTER]
simultaneously to enter the volume check mode and display “VOLUME
FLAT”.
11. In this mode, “VOLUME UP” is displayed when
[VOLUME]
knob is turned clockwise, and “VOLUME DOWN” is displayed
when
[VOLUME]
knob is turned counterclockwise.
12. Press two buttons of
[ILLUMINATUION]
and
[ENTER]
simultaneously to enter the jog check mode and display “JOG FLAT”.
13. In this mode, “JOG UP” is displayed when
[OPERATION DIAL]
knob is turned clockwise, and “JOG DOWN” is displayed when
[OPERATION DIAL]
knob is turned counterclockwise.
14. Press two buttons of
[ILLUMINATUION]
and
[ENTER]
simultaneously to release the Panel Test mode.
Key Key Routes
No. KEY0 KEY1 KEY2 KEY3 KEY4 (GT55 only)
1 DISPLAY ILLUMINATION ENTER DISC 1 +
2 POWER ERASE RETURN DISC 2 ENTER(PEQ)
3 CD PRESET EQ DISC 3 –
4 TUNER/BAND GROOVE
EX-CHANGE/
GUITAR
DISC SKIP
5
TAPE A/B SURROUND PLAY/PAUSE STOP FOCUS (GUITAR)
6
AUDIO
EQ BAND (GT22/GT44)
TUNING – CD-USB SYNC/REC1 FOCUS (VOCAL)
PLAY MODE (GT55)
7
USB FOLDER – CD-TAPE SYNC VOCAL
8
SUBWOOFER
OPEN/CLOSE
TAPE REC
BASS
(GT44/GT55) PAUSE/START
9 FOCUS (BASS)