Sony MHC-VX888 (serv.man2) Service Manual ▷ View online
11
HCD-VX888
2-8.
MAIN BOARD
2-9.
LEAF SW BOARD, HEAD (A) BOARD, HEAD (B) BOARD
1
two screws (+BVTP 3
×
10)
2
MAIN board
MAIN board
6
screw (+PTT 2
×
4)
4
screw (+PTT 2
×
4)
3
LEAF SW board
2
five claws
5
head (A) board
7
head (B) board
1
Remove the four solderings.
12
HCD-VX888
2-10. BASE UNIT (BU-30BD61A)
8
5
two screws (+PTPWH M2.6)
7
screws (DIA. 12)
2
two screws (+BVTP 2.6
×
8)
9
two insulators (BU-30)
9
two insulators (BU-30)
3
two stoppers (BU)
4
coil spring (insulator)
4
coil spring (insulator)
6
two coil springs (insulator)
0
base unit
(BU-30BD61A)
(BU-30BD61A)
1
wire (flat type)
(25 core)
(25 core)
(CN101)
2-11. VIDEO BOARD, DRIVER BOARD
5
screw (+BVTP 2.6
×
8)
8
DRIVER board
6
3
two screws (+BVTP 3
×
10)
7
wire (flat type)
(8 core)
(8 core)
(CN702)
2
wire (flat type)
(13 core)
(13 core)
(CN502)
1
wire (flat type)
(25 core)
(25 core)
(CN501)
4
VIDEO board
13
HCD-VX888
2-12. MOTOR BOARD, ADDRESS SENSOR BOARD
7
Pull-out the disc tray.
2
two
screws (+BVTP 2.6
×
8)
8
screw (+PTPWH 2.6
×
8)
9
tray
0
screw (+BVTP 2.6
×
8)
3
6
MOTOR board
qa
ADDRESS SENSOR board
1
Remove the two solderings of motor.
5
connector
4
wire (flat type)
(8 core)
(8 core)
(CN721)
14
HCD-VX888
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 three buttons x , ENTER , and ?/1 simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously,
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.
cord is plugged in and out.
Procedure:
1. Press three buttons x , ENTER , and DISPLAY
1. Press three buttons x , ENTER , and DISPLAY
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 OPEN/CLOSE simul-
1. Press ?/1 button to turn the set ON.
2. Select the function “CD”.
3. Press three buttons x , ENTER , and OPEN/CLOSE simul-
taneously.
4. The CD service mode is selected.
5. With the CD in stop status, press
5. With the CD in stop status, press
M
button to move the pickup
to outside track, or press
m
button to inside track.
6. To exit from this mode, perform as follows:
1) Move the pickup to the most inside track.
2) Press ?/1 button to turn the set OFF.
2) Press ?/1 button to turn the set OFF.
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.
[CD Ship Mode (Memory Clear) ]
• 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 three buttons x , ENTER and GAME simultaneously.
3. After the "STANDBY" display blinks six times, a message
1. Press ?/1 button to turn the set ON.
2. Press three buttons x , ENTER and GAME 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.
[CD Ship Mode (No Memory Clear) ]
• 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.
[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
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
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.
“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
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”.
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,
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, CDD version, CDM
version, BD version, ST version, TC version, TA version and
TM version in this order, and returns to the model number and
destination display.
version, BD version, ST version, TC version, TA version and
TM 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
“K
0
V
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.
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.
+
–
Ver 1.3
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