Sony BMZ-K2 / CX-BK2 Service Manual ▷ View online
CX-BK2
21
4-3.
HOW TO INSTALL THE GEAR (MODE C)
1
Align the mark on the rotary encoder (S771) with the projection of the assy.
2
Check that the cam (BU U/D) can not be rotated in the direction of arrow.
3
Install the gear (
mode
C)
– bottom view • front –
gear (
mode
C)
rotary encoder
(S771)
(S771)
cam (BU U/D)
mark
projection
chassis
mark
B
slider (mode cam) assy
shaft
mark
A
mark
D
gear (mode cam)
cam (gear)
mark
C
1
Slide the shaft in the direction of arrow.
2
Align mark
A
on the gear (mode cam) with mark
B
on the slider (mode cam) assy,
then install the gear (mode cam).
3
Check that mark
C
on the gear (mode cam) is in alignment with mark
D
on the cam (gear).
– bottom view • front –
4-4.
HOW TO INSTALL THE GEAR (MODE CAM)
CX-BK2
22
4-5.
HOW TO INSTALL THE ROTARY ENCODER (S702), GEAR (STOCKER COMMUNICATION)
4-6.
HOW TO INSTALL THE STOCKER ASSY
2
five solders
6
two gears
(stocker communication)
(stocker communication)
4
gear
(stocker communication)
(stocker communication)
CONNECTOR board
7
two screws
(PTPWH2.6
×
8)
5
screw
(PTPWH2.6
×
8)
3
screw
(PWH2
×
6)
rotary encoder
(S702)
(S702)
gear
(stocker
communication)
(stocker
communication)
– rear –
1
rotary encoder
(S702)
(S702)
Engage the rotary encoder (S702)
and the gear (stocker communication)
as shown below in the figure.
and the gear (stocker communication)
as shown below in the figure.
2
cam
(stocker V)
3
screw
(PTPWH2.6
×
8)
4
two cams
(stocker U/D)
5
two screws
(PTPWH2.6
×
8)
boss
boss
rotary encoder
(S702)
(S702)
Install the stocker assy
fitting three bosses into the
each groove of cam
then fix by rotating the cams
in the direction of arrow.
fitting three bosses into the
each groove of cam
then fix by rotating the cams
in the direction of arrow.
hole
gear
(stocker communication)
(stocker communication)
– rear –
screw
1
Position the hole on the gear
(stocker communication) on the
screw of the rotary encoder (S702).
(stocker communication) on the
screw of the rotary encoder (S702).
To install three cams, align each groove
of the cam with each
of the cam with each
f
mark on the
chassis as shown in the figure.
cam
23
CX-BK2
[Cold Reset]
*
The cold reset clears all data including preset data stored in
the RAM to initial conditions. Execute this mode when re-
turning the set to the customer.
the RAM to initial conditions. Execute this mode when re-
turning the set to the customer.
Procedure:
1. Press the
1. Press the
POWER
1
button to turn off the main power.
2. While depressing the
x
button, press the
POWER
1
button.
3. The fluorescent indicator tube does not display any message
and the set is reset.
[Version Display Mode]
*
The version of the microcomputer is displayed.
Procedure:
1. Press the
1. Press the
POWER
1
button to turn the set on.
2. To enter the test mode, press two buttons
x
and
POWER
1
simultaneously for more than five seconds. The version of the
microcomputer is displayed.
microcomputer is displayed.
[FL Tube Check]
*
All fluorecent segments are tested.
Procedure:
1. Insert a disc, and extract an AC plug.
2. While depressing the
1. Insert a disc, and extract an AC plug.
2. While depressing the
[FUNCTION]
button, insert an AC plug
to enter the test mode.
3. The message “CD TEST” is displayed, the initialization is
performed.
Then all segments of the fluorecent indicator tube are turned on.
[CD Ship Mode]
*
This mode moves the optical pick-up to the position durable
to vibration. Use this mode when returning the set to the cus-
tomer after repair.
to vibration. Use this mode when returning the set to the cus-
tomer after repair.
Procedure:
1. Press the
1. Press the
POWER
1
button to turn the set on.
2. Set the FUNCTION to CD.
3. Press the x button for more than five seconds.
4. After a message “MECHA LOCK” is displayed on the fluo-
3. Press the x button for more than five seconds.
4. After a message “MECHA LOCK” is displayed on the fluo-
rescent indicator tube, the CD ship mode is set and the power
is turned off.
is turned off.
[Disc Tray Lock]
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Setting Procedure :
1. Press the
disc in the store is equipped.
Setting Procedure :
1. Press the
POWER
1
button to turn the set on.
2. Press two buttons of x and Z simultaneously for five sec-
onds.
3. The message “LOCKED” is displayed and the tray is locked.
Releasing Procedure :
1. Press two buttons of x and Z simultaneously for five sec-
Releasing Procedure :
1. Press two buttons of x and Z simultaneously for five sec-
onds again.
2. The message “UNLOCKED” is displayed and the tray is un-
locked.
Note : When “LOCKED” is displayed, the tray lock is not released
by turning power on/off with the
by turning power on/off with the
POWER
1
button.
[AMP Test]
*
This mode is used to check the function of the amplifier.
Procedure:
1. Extract an AC plug.
2. While depressing the
1. Extract an AC plug.
2. While depressing the
[GEQ]
button, insert an AC plug to en-
ter the AMP test mode. The message “AMP TEST” is displayed.
3. The message “Volume MAX” is displayed, when the
[VOL-
UME]
knob is rotated clockwise. The message “Volume 0” is
displayed, when the
[VOLUME]
knob is rotated counterclock-
wise.
4. Each time the
[BASE]
or
[TREBLE]
knob is turned, the mes-
sage “EQ MAX”, “EQ MIN” or “EQ FLAT” is displayed in
this order.
this order.
[AM Channel Step 9 kHz/10kHz Selection Mode]
*
Either the 9 kHz step or 10 kHz step can be selected for the
AM channel step.
AM channel step.
Procedure:
1. Set the FUNCTION to AM.
2. While depressing the
1. Set the FUNCTION to AM.
2. While depressing the
[BAND]
button, press the
POWER
1
but-
ton.
3. The channel step is changed over.
[CD Test Mode]
*
This mode can run the CD sled motor freely. Use this mode,
for instance, when cleaning the pickup.
for instance, when cleaning the pickup.
Procedure:
1. Extract an AC plug.
2. While depressing the
1. Extract an AC plug.
2. While depressing the
[FUNCTION]
button, insert an AC plug
to enter the CD test mode. The message “CD TEST” is dis-
played.
played.
3. With the CD in stop status, press the
>
button to move the
pickup to outside track, or press the
.
button to inside track.
4. When press the
B
button, normal playback is performed.
5. Each time the
B
button is pressed during normal playback,
the tracking servo is switched on or off.
[CD Repeat 5 Times Limit Release Mode]
Procedure:
1. Press the
1. Press the
POWER
1
button to turn the set on.
2. Select the FUNCTION to CD.
3. Press three buttons of
3. Press three buttons of
x
and
[FUNCTION]
and
B
simulta-
neously.
4. The repeat all mark blinks and then repeat 5 times limit is
released.
SECTION 5
TEST MODE
24
CX-BK2
SECTION 6
ELECTRICAL ADJUSTMENTS
RFDC signal waveform
Checking Location: CD board (Conductor side)
CD SECTION
Note:
1. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
2. Use an oscilloscope with more than 10M
2. Use an oscilloscope with more than 10M
Ω impedance.
3. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
RFDC Level Check
Connection:
Procedure:
1.
1.
Connect an oscilloscope to test point TP (RFDC) and TP (VC)
on the BD board.
on the BD board.
2.
Turn the power on.
3.
Put the disc (YEDS-18) in to playback the number five track.
4.
Confirm that oscilloscope waveform is clear and check RFDC
signal level is correct or not.
signal level is correct or not.
Note:
A clear RFDC signal waveform means that the shape “
◊” can be
clearly distinguished at the center of the waveform.
+
–
–
BD board
TP (RFDC)
TP (VC)
oscilloscope
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level: 0.6
±
0.15 Vp-p
RFAC Level Check
Connection:
Procedure:
1.
1.
Connect an oscilloscope to test point TP (RFAC) and TP (VC)
on the BD board.
on the BD board.
2.
Turn the power on.
3.
Put the disc (YEDS-18) in to playback the number five track.
4.
Confirm that oscilloscope waveform is clear and check RFAC
signal level is correct or not.
signal level is correct or not.
Note:
A clear RFAC signal waveform means that the shape “
◊” can be
clearly distinguished at the center of the waveform.
RFAC signal waveform
Checking Location: BD board (Side B)
+
–
–
BD board
TP (RFAC)
TP (VC)
oscilloscope
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level: 1.0
±
0.4 Vp-p
S-curve Check
Connection:
Procedure:
1.
1.
Connect an oscilloscope to test point TP (FE) and TP (VC)
on the BD board.
on the BD board.
2.
While depressing the button, insert an AC plug.
3.
Put the disc (YEDS-18) in and press the button and
actuate the focus search. (actuate the focus search when disc
table is moving in and out)
actuate the focus search. (actuate the focus search when disc
table is moving in and out)
4.
Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 2
between A and B. And confirm peak to peak level within 2
± 1
Vp-p.
S-curve waveform
Note:
• Try to measure several times to make sure than the ratio of A : B
or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
Checking Location: BD board (Side B)
+
–
–
BD board
TP (FE)
TP (VC)
oscilloscope
A
B
symmetry
within 2
±
1 Vp-p
B
x
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