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Model
HCD-VX555 HCD-VX555J MHC-VX555 MHC-VX555J
Pages
85
Size
17.88 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-vx555-hcd-vx555j-mhc-vx555-mhc-vx555j.pdf
Date

Sony HCD-VX555 / HCD-VX555J / MHC-VX555 / MHC-VX555J Service Manual ▷ View online

9
HCD-VX555/VX555J
2-7. LEAF SW BOARD, HEAD (A) BOARD AND HEAD (B) BOARD
2-6. MAIN BOARD AND POWER BOARD
4
Three screws (+BVTP 3
 
×
 10)
6
Two screws (+BVTP 3
 
×
 8)
7
Heat sink
3
Two screws (+BVTP 3
 
×
 16)
1
Two screws (+BVTP 3
 
×
 10)
2
MAIN board
5
POWER board
MAIN board
5
Screw (+PTT 2
 
×
 4)
3
Screw (+PTT 2
 
×
 4)
2
LEAF SW board
1
Five claws
4
HEAD (A) board
6
HEAD (B) board
Remove the four solderings.
10
HCD-VX555/VX555J
2-8. BASE UNIT
4
 Turn the pulley to the direction of arrow.
pulley
Base unit
qg
qd
Two screws (+PTPWH M2.6)
5
Screw (+PTPWH M2.6)
1
Pulley(B)(BU-30), chucking
2
Two Screws (+PTPWH M2.6)
3
Lever (lifter)
qf
Screw (DIA. 12)
qa
Two screws (+BVTP 2.6
 
×
 8)
q;
BD board
qh
Two insulators
6
Holder assy
qh
Two insulators
qs
Two stoppers
7
Flat type wire (25 core)
8
Flat type wire (16 core)
9
Remove the solder
      (four portions).
Spring (insulator), coil
Spring (insulator),
coil
Spring
(insulator),
coil
11
HCD-VX555/VX555J
2-9. VIDEO BOARD, DRIVER BOARD, MOTER BOARD AND ADDRESS SENSOR BOARD
9
 Pull-out the Table.
4
Two
 screws (+BVTP 2.6 
×
 8)
q;
Screw (+PTPWH 2.6
 
×
 8)
qa
Tray
1
Screw (+BVTP 2.6
 
×
 8)
qs
Screw (+BVTP 2.6
 
×
 8)
6
Flat type wire (8 core)
3
Flat type wire 
    (8 core)
8
MOTOR board
qd
ADDRES SENSOR board
qf
Flat type wire (13 core)
qg
Flat type wire (25 core)
qh
Two Screws
     (+BVTP 2.6
 
×
 8)
qj
VIDEO board
2
DRIVER board
5
Remove the two solderings of motor.
7
Connector
12
HCD-VX555/VX555J
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 three buttons x  ,  ENTER , and ?/1 simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[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.
Procedure:
1. Press three buttons x ,  ENTER , and DISPLAY
simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[Tuner Step Change]
• A step of AM 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  button
to select the BAND “AM”.
3. Press ?/1 button to turn the set OFF.
4. Press  ENTER  and ?/1 buttons simultaneously, and the display
of  fluorescent indicator tube changes to “AM 9 k STEP” or
“AM 10 k STEP”, and thus the channel step is changed over.
[Function Change Mode]
• Select either VIDEO or MD of the external FUNCTION input.
Procedure:
1. Turn on the power.
2. Hold down  MD (VIDEO)  button then press  ?/1  button , and
release  ?/1  button first in order not to switch off the set
immediately.
The another function of the previous function is selected , the
input level is also changed and displayed “ MD ” or “VIDEO”.
[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,
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, CD version, CDDM version,
CDMA version, CDMB, version BDA version, BDB version,
ST version,  TA version, TM version and TC 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.
6. Press  DISC 2  button, and the key check mode is activated.
7. In the key check mode, the fluorescent indicator tube displays
“K
0  V0”.  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.
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.
[MC Test  Mode]
• This mode is used to check operations of the respective sections
of Amplifier, Tuner, and Tape.
Procedure:
* To enter MC Test Mode
1. Press the  ?/1  button to turn on the set.
2. Press the three buttons of x , ENTER and DISC 3
simultaneously.
3. The messages MUSIC, MOVIE, GAME and P FILE flash on
the FL display tube.
The input FUNCTION is Changed to VIDEO.
* Check of Amplifier
1.  When f (CURSOR UP)  button is pressed, GEQ increases to
its maximum and a message “GEQ MAX” appears.
2. When  F (CURSOR DOWN)  button is pressed, GEQ decreases
to its minimum and a message “GEQ MIN” appears.
3. When  g (CURSOR LEFT)  or  G (CURSOR RIGHT)  button
is pressed, GEQ is set to flat and a message “GEQ FLAT”
appears.
4. 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.
5. 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.
* Check of clock frequency
1. To check the frequency of clock used to run the time in the unit,
the clock output is available at pin 39 (IC 501, MASTER
CONTROL) only during MC test mode.
2. The frequency is 32.768 kHz or so.
* Tuner function
1. 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. (It means that the
memory is cleared.)
2. The minimum, center and maximum frequency of each band is
set then.
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