Sony HCD-GZR777D / MHC-GZR777D (serv.man2) Service Manual ▷ View online
HCD-GZR777D
17
1
screw
(+BVTP 3 × 8)
2
two screws
(+BVTP 3 × 8)
3
two screws
(+BVTP 3 × 8)
5
chassis
4
2-19. MOTOR (LD) BOARD
2-20. CHASSIS
4
Remove the two solders of motor.
3
MOTOR (LD) board
1
belt (loading)
5
loading motor assy (M751)
2
two screws
(+BTTP (M2.6))
HCD-GZR777D
18
2-21. DMB19 BOARD
2-22. BASE UNIT
9
two screws
(+BVTP 3 × 6)
0
two screws
(+BVTP 3 × 6)
qs
two screws
(+BVTP 3 × 6)
qd
screw
(+BVTP 2.6 (3CR))
2
wire (flat type) (9 core)
(CN1106)
3
wire (flat type) (7 core)
(CN1104)
8
wire (flat type) (24 core)
(CN101)
qf
bracket (DMB)
5
wire (flat type) (7 core)
(CN4602)
1
CN1105 (4P)
4
CN1103 (3P)
6
CN601 (9P)
qa
DMB19 board
7
CN201 (6P)
2
base unit
1
floating screw
(+PTPWH M2.6)
HCD-GZR777D
19
2-23. OPTICAL PICK-UP
1
two insulator screws
3
two insulators
4
two insulators
2
two insulator screws
5
optical pick-up
6
holder (310)
HCD-GZR777D
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.
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 fluorescent indi-
cator tube. Then, the fluorescent indicator tube becomes blank
for a while, and the system is reset.
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 fluorescent indicator
tube.
• Check of Equalizer Level
1. Press the [EQ BAND/MEMORY] button repeatedly until a
message “ALL EQ MIN” appears on the fluorescent indicator
tube. GEQ decreases to its minimum.
tube. GEQ decreases to its minimum.
2. Press the [EQ BAND/MEMORY] button repeatedly until a
message “ALL EQ MAX” appears on the fluorescent indicator
tube. GEQ increases to its maximum.
tube. GEQ increases to its maximum.
3. Press the [EQ BAND/MEMORY] button repeatedly until a
message “ALL EQ FLAT” appears on the fluorescent indicator
tube. GEQ is set to flat.
tube. GEQ is set to flat.
• 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 fluorescent indicator tube.
2. Press the [ILLUMINATION] button repeatedly, the sound vol-
ume decreases to its minimum and message “VOLUME16”
t “VOLUME MIN” appears on the fluorescent indicator
tube.
t “VOLUME MIN” appears on the fluorescent indicator
tube.
• 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 fluorescent indi-
cator tube.
cator tube.
• 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.
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 fluorescent indi-
cator tube.
• Check of VACS Display/AMP Adjustment Select
1. Press the [REC TO USB] button repeatedly until a message
“V0 0 0” appears on the fluorescent indicator tube. “0” repre-
sents VACS level which is triggered by signal level.
sents 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 fluorescent indicator tube. “+4”
represents Equalizer Low level, “0” represents Equalizer Mid
level and “+2” represents Equalizer High level.
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 fluorescent indicator
tube. EQ Band is set to Low level.
tube. EQ Band is set to Low level.
2. Press the [EQ BAND/MEMORY] button repeatedly until a
message “MID 0 dB” appears on the fluorescent indicator tube.
EQ Band is set to Middle level.
EQ Band is set to Middle level.
3. Press the [EQ BAND/MEMORY] button repeatedly until a
message “HIGH +2 dB” appears on the fluorescent indicator
tube. EQ Band is set to High level.
tube. 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 fluorescent indicator
tube.
tube.
2. When the [OPERATION DIAL] ring is turned clockwise or
counterclockwise even slightly, “LOW +4 dB” change to
“LOW –8 dB”
“LOW –8 dB”
y “LOW +8 dB” appears on the fluorescent
indicator tube.
3. Press the [EQ BAND/MEMORY] button repeatedly until a
message “MID 0 dB” appears on the fluorescent indicator tube.
4. When the [OPERATION DIAL] ring is turned clockwise or
counterclockwise even slightly, “MID 0 dB” change to “MID
–8 dB”
–8 dB”
y “MID +8 dB” appears on the fluorescent indicator
tube.
5. Press the [EQ BAND/MEMORY] button repeatedly until a
message “HIGH +2 dB” appears on the fluorescent indicator
tube.
tube.
6. When the [OPERATION DIAL] ring is turned clockwise or
counterclockwise even slightly, “HIGH +2 dB” change to
“HIGH –8 dB”
“HIGH –8 dB”
y “HIGH +8 dB” appears on the fluorescent
indicator tube.
• Check of DBFB ON/OFF Select
1. Press the [ILLUMINATION] button repeatedly until a mes-
sage “DBFB OFF” or “DBFB ON” appears on the fluorescent
indicator tube.
indicator tube.
• To release from AMP Test Mode
1. To release from this mode, press the [
?/1
] button.
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