Sony HCD-DX90 / MHC-DX90 Service Manual ▷ View online
HCD-DX90
10
3-8.
MAIN BOARD, AMP BOARD
3-9.
LEAF SW BOARD, HEAD (A) BOARD, HEAD (B) BOARD
5
three screws (+BVTP 3
×
8)
7
two screws (+BVTP 3
×
8)
8
heat sink
4
two screws (+BVTP 3
×
16)
1
two screws (+BVTP 3
×
8)
3
MAIN board
2
connector(CN502)
2
connector
(CN503)
(CN503)
6
POWER AMP board
7
screw (+PS 2.6
×
5)
5
screw (+PS 2.6
×
5)
4
leaf SW board
2
1
five claws
6
head (A) board
8
head (B) board
3
Remove the four solderings.
HCD-DX90
11
3-10. BASE UNIT (BU-K2BD38)
3-11. DRIVER BOARD, MOTOR BOARD, SENSOR BOARD
base unit
(BU-K2BD38)
(BU-K2BD38)
7
2
two screws (+PTPWH 2.6), floating
8
two insulators
9
two insulators
4
two screws (+PTPWH 2.6)
5
stopper (BU)
6
two springs (insulator), coil
1
flat type wire (CN101)
3
two springs (insulator), coil
4
three
screws (+BVTP 2.6
×
8)
9
screw (+PTPWH 2.6
×
8)
q;
tray
2
screw (+BVTP 2.6
×
8)
qa
screw (+BVTP 2.6
×
8)
7
flat type wire (CN721)
6
MOTOR board
qs
SENSOR board
8
connector(CN722)
3
DRIVER board
1
connector (CN701)
5
Remove the two solderings of motor.
12
HCD-DX90
SECTION 4
TEST MODE
[MC 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 three buttons x , ENTER , and ?/1 simulta-neously.
2. The fluorescent indicator tube displays “COLD RESET” and
1. Press three buttons x , ENTER , and ?/1 simulta-neously.
2. The fluorescent indicator tube displays “COLD RESET” and
the set is reset.
[CD Ship Mode]
• This mode moves the pickup to the position durable to vibra-
tion. Use this mode when returning the set to the customer after
repair.
repair.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Press CD button and ?/1 button simultaneously.
3. After the "STANDBY" display blinks six times, a message
1. Press ?/1 button to turn the set ON.
2. Press CD button and ?/1 button simultaneously.
3. After the "STANDBY" display blinks six times, a message
“LOCK” is displayed on the fluorescent indicator tube, and the
CD ship mode is set.
CD ship mode is set.
[MC Hot Reset]
• This mode resets the set with the preset data kept stored in the
memory. The hot reset mode functions same as if the power
cord is plugged in and out.
cord is plugged in and out.
Procedure:
1. Press three buttons x , ENTER , and DISC 1 simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously,
1. Press three buttons x , ENTER , and DISC 1 simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[CD Service Mode]
• This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pickup.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function “CD”.
3. Press three buttons x , ENTER , and Z OPEN/CLOSE si-
1. Press ?/1 button to turn the set ON.
2. Select the function “CD”.
3. Press three buttons x , ENTER , and Z OPEN/CLOSE si-
multaneously.
4. The CD service mode is selected.
5. With the CD in stop status, turn the shuttle knob clockwise to
5. With the CD in stop status, turn the shuttle knob clockwise to
move the pickup to outside track, or turn the shuttle knob
counter-clockwise to inside track.
counter-clockwise to inside track.
6. To exit from this mode, perform as follows:
1) Move the pickup to the most inside track.
2) Press three buttons in the same manner as step 2.
2) Press three buttons in the same manner as step 2.
Note:
• Always move the pickup to most inside track when exiting from
this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can be
chipped.
[VACS ON/OFF Mode]
• This mode is used to switch ON and OFF the VACS (Variable
Attenuation Control System).
Procedure:
Press the ENTER and SPECTRUM buttons simultaneously. The
message “VACS OFF” or “VACS ON” appears.
Press the ENTER and SPECTRUM buttons simultaneously. The
message “VACS OFF” or “VACS ON” appears.
[Change-over of MW Tuner Step between 9 kHz and
10 kHz]
10 kHz]
• A step of MW channels can be changed over between 9 kHz
and 10 kHz.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND
1. Press ?/1 button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND
button to select the BAND “MW”.
3. Press ?/1 button to turn the set OFF.
4. Press ENTER and ?/1 buttons simultaneously, and the display
4. Press ENTER and ?/1 buttons simultaneously, and the display
of fluorescent indicator tube changes to “MW 9 k STEP” or
“MW 10 k STEP”, and thus the channel step is changed over.
“MW 10 k STEP”, and thus the channel step is changed over.
[GC Test Mode]
• This mode is used to check the software version, FL tube, LED,
keyboard and VACS.
Procedure:
1. Press three buttons x , ENTER , and DISC 2 simultaneously.
2. LEDs and fluorescent indicator tube are all turned on.
3. When you want to enter the software version display mode,
1. Press three buttons x , ENTER , and DISC 2 simultaneously.
2. LEDs and fluorescent indicator tube are all turned on.
3. When you want to enter the software version display mode,
press DISC 1 . The model number and destination are displayed.
4. Each time DISC 1 is pressed, the display changes starting
from MC version, GC version, VC version, CD version, CM
version, ST version, TC version, TA version, TM version and
BR version in this order, and returns to the model number and
destination display.
version, ST version, TC version, TA version, TM version and
BR version in this order, and returns to the model number and
destination display.
5. When DISC 3 is pressed while the version numbers are being
displayed except model number and destination, year, month
and day of the software creation appear. When DISC 3 is
pressed again, the display returns to the software version display.
When DISC 1 is pressed while year, month and day of the
software creation are being displayed, the year, month and day
of creation of the software versions are displayed in the same
order of version display.
and day of the software creation appear. When DISC 3 is
pressed again, the display returns to the software version display.
When DISC 1 is pressed while year, month and day of the
software creation are being displayed, the year, month and day
of creation of the software versions are displayed in the same
order of version display.
6. Press DISC 2 button, and the key check mode is activated.
7. In the key check mode, the fluorescent indicator tube displays
7. In the key check mode, the fluorescent indicator tube displays
“KEY
0
VOL
0
”. Each time a button is pressed, “KEY” value
increases. However, once a button is pressed, it is no longer
taken into account.
“VOL” value increases like 1, 2, 3 ... if rotating VOLUME
knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in
“–” direction.
taken into account.
“VOL” value increases like 1, 2, 3 ... if rotating VOLUME
knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in
“–” direction.
8. Also when DISC 3 is pressed after lighting of all LEDs and FL
tubes, value of VACS appears.
9. To exit from this mode, press three buttons in the same manner
as step 1, or disconnect the power cord.
13
HCD-DX90
[MC Test Mode]
• This mode is used to check operations of the respective sections
of Amplifier, Tuner, CD and Tape.
of Amplifier, Tuner, CD and Tape.
Procedure:
1.
1.
Press the ?/1 button to turn on the set.
2.
Press the three buttons of x , ENTER and DISC 3
simultaneously.
simultaneously.
3.
A message “TEST MODE” appears on the FL display tube.
4
When v (CURSOR UP) button is pressed, GEQ increases to
its maximum and a message “GEQ ALL MA” appears.
its maximum and a message “GEQ ALL MA” appears.
5.
When V (CURSOR DOWN) button is pressed, GEQ decreases
to its minimum and a message “GEQ ALL M1” appears.
to its minimum and a message “GEQ ALL M1” appears.
6.
When b (CURSOR LEFT) or B (CURSOR RIGHT) button
is pressed, GEQ is set to flat and a message “GEQ FLAT”
appears.
is pressed, GEQ is set to flat and a message “GEQ FLAT”
appears.
7.
When the VOLUME control knob is turned clockwise even
slightly, the sound volume increases to its maximum and a
message “VOLUME MAX” appears for two seconds, then the
display returns to the original display.
slightly, the sound volume increases to its maximum and a
message “VOLUME MAX” appears for two seconds, then the
display returns to the original display.
8.
When the VOLUME control knob is turned counter-clockwise
even slightly, the sound volume decreases to its minimum and
a message “VOLUME MIN” appears for two seconds, then
the display returns to the original display.
even slightly, the sound volume decreases to its minimum and
a message “VOLUME MIN” appears for two seconds, then
the display returns to the original display.
9.
In the test mode, the default-preset channel is called even when
the TUNER is selected and an attempt is made to call the preset
channel that has been stored in memory, by operating the Shuttle
knob. (It means that the memory is cleared.)
the TUNER is selected and an attempt is made to call the preset
channel that has been stored in memory, by operating the Shuttle
knob. (It means that the memory is cleared.)
10. When CD is selected and the EDIT button is pressed, the disc
that is being chucked at this moment becomes the default
setting. It means that the default disc only is accessed when
any other discs are selected even though the display indication
changes accordingly. At the same time, the DISC SKIP EX-
CHANGE and Z OPEN/CLOSE cannot be accepted. (It
means that the tray motor and the turntable motor are disabled
of their operation.)
setting. It means that the default disc only is accessed when
any other discs are selected even though the display indication
changes accordingly. At the same time, the DISC SKIP EX-
CHANGE and Z OPEN/CLOSE cannot be accepted. (It
means that the tray motor and the turntable motor are disabled
of their operation.)
11. When a tape is inserted in Deck B and recording is started, the
input source function selects VIDEO automatically.
12. When x button is pressed to stop recording, the Tape (Deck)
B is selected and tape is rewound using the Shuttle knob, tape
is rewound, tape is stops at around the record-starting position
and playback of the recorded portion of the tape is started. If
PAUSE is inserted even once during recording, tape is rewound
to the position around the PAUSE position and is played back.
is rewound, tape is stops at around the record-starting position
and playback of the recorded portion of the tape is started. If
PAUSE is inserted even once during recording, tape is rewound
to the position around the PAUSE position and is played back.
13. When the CD SYNC HI-DUB Button is press during playback
of Deck B, either normal speed or high speed can be selected
by this button.
by this button.
14. Select the desired loop by pressing the PLAY MODE button.
Insert a test tape AMS-110A or AMS-RO to Deck A.
15. Press the SPECTRUM button to enter the AMS test mode.
16. After a tape is rewound first, the FF AMS is checked, and the
16. After a tape is rewound first, the FF AMS is checked, and the
mechanism is shut off after detecting the AMS signal twice.
17. Then the REW AMS is checked and the mechanism is shut off
after detecting the AMS signal twice.
18. When the check is complete, a message of either OK or NG
appears.
19. When you want to exit this mode, press the ?/1 button twice.
The cold reset is enforced at the same time.
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