Sony HCD-GN880 Service Manual page 18

HCD-GN880
[VACS ON/OFF]
• This mode is used to switch ON and OFF the VACS (Variable
Attenuation Control System).
Procedure:
1. Press button to turn the set ON.
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2. Press [ENTER] button and [GAME MIXING] button
simultaneously. The message "VACS OFF" or "VACS ON"
appears.
[TUNER STEP CHANGE]
• The step interval of AM channels can be toggled between 9
kHz and 10 kHz.
Procedure:
1. Press button to turn the set ON.
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2. Press [TUNER/BAND] button to select the "AM".
3. Press button to turn the set OFF.
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4. Press [ENTER] button and
system will turn ON automatically. The message "AM 9k
STEP" or AM 10k STEP" appears and thus the channel step
is changed.
[CD SERVICE MODE]
• This mode let you move the CD sled motor freely. Use this
mode when you want to clean the optical pick-up.
Procedure:
1. Press button to turn the set ON.
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2. Select CD function.
3. Press x , [ENTER] button, and
simultaneously.
4. The CD service mode is activated. The message "SERVICE
MODE" appears.
5. With the CD in stop status, turn
rotation to move the optical pick-up to outside track, or turn
knob to counterclockwise rotation to move to
m M
inside track. The message "SLED OUT" or "SLED IN"
appears.
6. To turn on or off the laser, press [PLAY MODE] button. The
message "LASER ON" or "LASER OFF" appears on the
fluorescent indicator tube.
7. To release this mode, press
18
button simultaneously. The
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Z
OPEN/CLOSE button
knob to clockwise
m M
button.
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[AGING MODE]
This mode can be used for operation check of CD section.
• If an error occurs, the aging operation would stops and the
status is displayed.
• If there are no error occurs, the aging operation would
continues repeatedly.
Procedure:
1. Press button to turn the set ON
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2. Select CD function.
3. Load three discs on the disc tray.
4. Press [PLAY MODE] button to select the "ALL DISCS" mode,
and press the [REPEAT] button to select "REPEAT OFF" mode.
5. Press x button, [ENTER] button, and [EX-CHANGE/DISC
SKIP] button simultaneously.
6. Aging operation is started.
7. To release this mode, press
power cord to turn the power OFF.
Aging mode sequence:
Start (from disc 1)
Disc chucking
TOC reading
Play first track for 2 seconds
Play last track for 2 seconds
EX-CHANGE open/close
Open the disc tray
Disc skip
Close the disk tray
Change the next disc.
button or disconnect the
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