Test Mode - Sony HCD-GZR88D Service Manual

[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 the [ ] button, [DISC 3] button and [
x
simultaneously.
3. The message "COLD RESET" appears on the liquid crystal
display panel. Then, the liquid crystal display panel 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 the [ ] button to turn on the system.
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2. Press the [ ] button, [PRESET EQ] button and [DISC 1]
x
simultaneously.
3. The message "VACS0" appears on the liquid crystal
display panel.
• Check of Equalizer Level
1. Press the [EQ BAND/MEMORY] button repeatedly until a
message "ALL EQ MIN" appears on the liquid crystal
display panel. GEQ decreases to its minimum.
2. Press the [EQ BAND/MEMORY] button repeatedly until a
message "ALL EQ MAX" appears on the liquid crystal
display panel. GEQ increases to its maximum.
3. Press the [EQ BAND/MEMORY] button repeatedly until a
message "ALL EQ FLAT" appears on the liquid crystal
display panel. GEQ is set to fl at.
• Check of Volume
1. Press the [DISPLAY] button repeatedly, the sound volume
increases to its maximum and message "VOLUME16" t
"VOLUME MAX" appears on the liquid crystal display
panel.
2. Press the [OPTIONS] button repeatedly, the sound volume
decreases to its minimum and message "VOLUME16" t
"VOLUME MIN" appears on the liquid crystal display panel.
• Check of VACS (Variable Attenuation Control System)
ON/OFF Select
1. Press the [REC TO USB] button repeatedly until a message
"VACS OFF" or "VACS ON" appears on the liquid crystal
display panel.
• To release from Common Test Mode
1. To release from this mode, press the [
2. To cold reset is enforced at the same time.
SECTION 3

TEST MODE

] button
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] button.
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HCD-GZR88D/GZR99D
[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 the [ ] button to turn on the system.
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2. Press the [ ] button, [GROOVE] button and [DISC 1] button
x
simultaneously.
3. The message "AMP TEST IN" appears of the liquid crystal
display panel.
• Check of VACS Display/AMP Adjustment Select
1. Press the [REC TO USB] button repeatedly until a message
"V0 0 0" appears on the liquid crystal display panel. "0"
represents VACS level which is triggered by signal level.
2. Press the [REC TO USB] button repeatedly until a message
"D +6 +2 +4" appears on the liquid crystal display panel.
"+6" represents Equalizer Low level, "+2" represents
Equalizer Mid level and "+4" represents Equalizer High
level.
• Check of Equalizer Band Select
1. Press the [EQ BAND/MEMORY] button repeatedly until a
message "LOW +6 dB" appears on the liquid crystal display
panel. EQ Band is set to Low level.
2. Press the [EQ BAND/MEMORY] button repeatedly until a
message "MID +2 dB" appears on the liquid crystal display
panel. EQ Band is set to Middle level.
3. Press the [EQ BAND/MEMORY] button repeatedly until a
message "HIGH +4 dB" appears on the liquid crystal display
panel. EQ Band is set to High level.
• Change of Equalizer Band
1. Press the [EQ BAND/MEMORY] button repeatedly until a
message "LOW +6 dB" appears on the liquid crystal display
panel.
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 liquid
crystal display panel.
3. Press the [EQ BAND/MEMORY] button repeatedly until a
message "MID +2 dB" appears on the liquid crystal display
panel.
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 liquid crystal
display panel.
5. Press the [EQ BAND/MEMORY] button repeatedly until a
message "HIGH +4 dB" appears on the liquid crystal display
panel.
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 liquid
crystal display panel.
• Check of DBFB ON/OFF Select
1. Press the [OPTIONS] button repeatedly until a message
"DBFB OFF" or "DBFB ON" appears on the liquid crystal
display panel.
• To release from AMP Test Mode
1. To release from this mode, press the [ ] button.
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