Sony HCD-GZR333IA, Service Manual

Page: 20 / 98

HCD-GZR333IA
20
SECTION 3
TEST MODE
[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 [
?/1
] button to turn on the system.
2. Press the [
x
] button, [DISC 3] button and [
?/1
] button simul-
taneously.
3. The message “COLD RESET” appears on the LCD module.
Then, the LCD module 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 [
?/1
] button to turn on the system.
2. Press the [
x
] button, [PRESET EQ] button and [DISC 1] si-
multaneously.
3. The message “VACS0” appears on the LCD module.
• Check of Equalizer Level
1. Press the [EQ BAND/MEMORY] button repeatedly until a
message “ALL EQ MIN” appears on the LCD module. GEQ
decreases to its minimum.
2. Press the [EQ BAND/MEMORY] button repeatedly until a
message “ALL EQ MAX” appears on the LCD module. GEQ
increases to its maximum.
3. Press the [EQ BAND/MEMORY] button repeatedly until a
message “ALL EQ FLAT” appears on the LCD module. GEQ
is set to
fl at.
• Check of Volume
1. Press the [USB] button repeatedly, the sound volume increases
to its maximum and message “VOLUME16”
t
“VOLUME
MAX” appears on the LCD module.
2. Press the [OPTIONS] button repeatedly, the sound volume
decreases to its minimum and message “VOLUME16”
t
“VOLUME MIN” appears on the LCD module.
• Check of VACS (Variable Attenuation Control Sys-
tem) ON/OFF Select
1. Press the [REC TO USB] button repeatedly until a message
“VACS OFF” or “VACS ON” appears on the LCD module.
• To release from Common Test Mode
1. To release from this mode, press the [
?/1
] button.
2. To cold reset is enforced at the same time.
[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 [
?/1
] button to turn on the system.
2. Press the [
x
] button, [GROOVE] button and [DISC 1] button
simultaneously.
3. The message “AMP TEST IN” appears on the LCD module.
• Check of VACS Display/AMP Adjustment Select
1. Press the [REC TO USB] button repeatedly until a message
“V0 0 0” appears on the LCD module. “0” represents VACS
level which is triggered by signal level.
2. Press the [REC TO USB] button repeatedly until a message
“D +4 0 +2” appears on the LCD module. “+4” represents
Equalizer Low level, “0” represents Equalizer Mid level and
“+2” represents Equalizer High level.
• Check of Equalizer Band Select
1. Press the [EQ BAND/MEMORY] button repeatedly until a
message “LOW +4 dB” appears on the LCD module. EQ Band
is set to Low level.
2. Press the [EQ BAND/MEMORY] button repeatedly until a
message “MID 0 dB” appears on the LCD module. EQ Band is
set to Middle level.
3. Press the [EQ BAND/MEMORY] button repeatedly until a
message “HIGH +2 dB” appears on the LCD module. EQ Band
is set to High level.
• Change of Equalizer Band
1. Press the [EQ BAND/MEMORY] button repeatedly until a
message “LOW +4 dB” appears on the LCD module.
2. When the [OPERATION DIAL] ring is turned clockwise or
counterclockwise even slightly, “LOW +4 dB” change to
“LOW –8 dB”
y
“LOW +8 dB” appears on the LCD mod-
ule.
3. Press the [EQ BAND/MEMORY] button repeatedly until a
message “MID 0 dB” appears on the LCD module.
4. When the [OPERATION DIAL] ring is turned clockwise or
counterclockwise even slightly, “MID 0 dB” change to “MID
–8 dB”
y
“MID +8 dB” appears on the LCD module.
5. Press the [EQ BAND/MEMORY] button repeatedly until a
message “HIGH +2 dB” appears on the LCD module.
6. When the [OPERATION DIAL] ring is turned clockwise or
counterclockwise even slightly, “HIGH +2 dB” change to
“HIGH –8 dB”
y
“HIGH +8 dB” appears on the LCD mod-
ule.
• Check of DBFB ON/OFF Select
1. Press the [OPTIONS] button repeatedly until a message
“DBFB OFF” or “DBFB ON” appears on the LCD module.
• To release from AMP Test Mode
1. To release from this mode, press the [
?/1
] button.