Test Mode - Sony HCD-GZR7D Service Manual

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[COLD RESET]
• 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 the [ ] button to turn on the system.
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2. Press [ILLUMINATION] button, [ENTER] button and [
button simultaneously.
3. The message "COLD RESET" appears on the fl uorescent
indicator tube. Then, the fl uorescent indicator tube becomes
blank for a while, and the system is reset.
[COMMON TEST MODE]
• This mode is used to check operations of the respective section
of Equalizer level, volume and VACS ON/OFF.
Procedure:
• To enter Common Test Mode
1. Press [ ] button to turn on the system.
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2. Press [ ] button, [ILLUMINATION] button and [DISC 3]
x
simultaneously.
3. The message "VACS0" appers on the fl uorescent indicator
tube.
• Check of Equalizer Level
1. Press [EQ BAND/MEMORY] button repeatedly until a
message "ALL EQ MIN" appears on the fl uorescent indicator
tube. GEQ decreases to its minimum.
2. Press [EQ BAND/MEMORY] button repeatedly until a
message "ALL EQ MAX" appears on the fl uorescent
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indicator tube. GEQ increases to its maximum.
3. Press [EQ BAND/MEMORY] button repeatedly until a
message "ALL EQ FLAT" appears on the fl uorescent
indicator tube. GEQ is set to fl at.
• Check of Volume
1. When the [MASTER VOLUME] dial is turned
counterclockwise even slightly, the sound volume increases
to its maximum and message "VOLUME16" t "VOLUME
MAX" appears on the fl uorescent indicator tube.
2. When the [MASTER VOLUME] dial is turned clockwise
even slightly, the sound volume decreases to its minimum and
message "VOLUME16" t "VOLUME MIN" appears on the
fl uorescent indicator tube.
• Check of VACS (Variable Attenuation Control System)
ON/OFF Select
1. Press [REC TO TAPE] button repeatedly until a message
"VACS OFF" or "VACS ON" appears on the fl uorescent
indicator tube.
• To release from Common Test Mode
1. To release from this mode, press [
2. To cold reset is enforced at the same time.
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SECTION 4

TEST MODE

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[AMP TEST MODE]
• This mode is used to display the real time VACS level and
check operations of the respective sections of Equalizer band
and DBFB ON/OFF.
Procedure:
• To enter AMP Test Mode
] 1. Press [ ] button to turn on the system.
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2. Press [ ] button, [EQ BAND/MEMORY] button and [REC
x
TO USB] button simultaneously.
3. The message "AMP TEST IN" appers of the fl uorescent
indicator tube.
• Check of VACS Display/AMP Adjustment Select
1. Press [REC TO TAPE] button repeatedly until a message
"V0 0 0" appears on the fl uorescent indicator tube. "0"
represents VACS level which is triggered by signal level.
2. Press [REC TO TAPE] button repeatedly until a message
"D +6 +2 +4" appears on the fl uorescent indicator tube. "+6"
represents Equalizer Low level, "+2" represents Equalizer
Mid level and "+4" represents Equalizer High level.
• Check of Equalizer Band Select
1. Press [EQ BAND/MEMORY] button repeatedly until a
message "LOW +6 dB" appears on the fl uorescent indicator
tube. EQ Band is set to Low level.
2. Press [EQ BAND/MEMORY] button repeatedly until a
message "MID +2 dB" appears on the fl uorescent indicator
tube. EQ Band is set to Middle level.
3. Press [EQ BAND/MEMORY] button repeatedly until a
message "HIGH +4 dB" appears on the fl uorescent indicator
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tube. EQ Band is set to High level.
• Change of Equalizer Band
1. Press [EQ BAND/MEMORY] button repeatedly until a
message "LOW +6 dB" appears on the fl uorescent indicator
tube.
2. When the [OPERATION DIAL] ring is turned clockwise or
counterclockwise even slightly, "LOW +6 dB" change to
"LOW –8 dB" y "LOW +8 dB" appears on the fl uorescent
indicator tube.
3. Press [EQ BAND/MEMORY] button repeatedly until a
message "MID +2 dB" appears on the fl uorescent indicator
tube.
4. When the [OPERATION DIAL] ring is turned clockwise
or counterclockwise even slightly, "MID +2 dB" change to
"MID –8 dB" y "MID +8 dB" appears on the fl uorescent
indicator tube.
5. Press [EQ BAND/MEMORY] button repeatedly until a
message "HIGH +4 dB" appears on the fl uorescent indicator
tube.
6. When the [OPERATION DIAL] ring is turned clockwise or
counterclockwise even slightly, "HIGH +4 dB" change to
"HIGH –8 dB" y "HIGH +8 dB" appears on the fl uorescent
indicator tube.
• Check of DBFB ON/OFF Select
1. Press [OPTIONS] button repeatedly until a message "DBFB
OFF" or "DBFB ON" appears on the fl uorescent indicator
tube.
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• To release from AMP Test Mode
1. To release from this mode, press [
MEMORY] button and [
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HCD-GZR7D/GZR8D/GZR9D
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0 5 8 2 9 9 4 2 8
m
] button, [EQ BAND/
x
] button simultaneously.
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