DOWNLOAD Sony CDP-XB930 / CDP-XB930E Service Manual ↓ Size: 4.6 MB | Pages: 44 in PDF or view online for FREE

Model
CDP-XB930 CDP-XB930E
Pages
44
Size
4.6 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cdp-xb930-cdp-xb930e.pdf
Date

Sony CDP-XB930 / CDP-XB930E Service Manual ▷ View online

9
When the p  button is pressed, the following will be displayed.
(partial lighting 2)
When the OPEN/CLOSE § button is pressed, all will light up
again.
• Key check
All buttons have corresponding button numbers. When a button
is pressed, the counter will count up and display the button’s
number. However, the counter will only count to “18”. It will
not count for buttons already pressed once, but will display the
button’s number.(Partial lighting 3)
SECTION 4
TEST MODE
4-1. AF MODE
The following checks can be performed in the AF mode, which is
set by connecting the TP51 (AFADJ) terminal on MAIN board to
the Ground and turning on the power.
• FL tube check
After all segments light up, when the · button is pressed, the
following will be displayed. (Partial lighting 1)
• Remote commander check
When the · button of the remote commander is pressed, the
following will be displayed. All go off when the other buttons
are pressed. (Partial lighting 4)
LANGUAGE
MUSIC SCAN
AUTO SPACE
PEAK SEARCH
PLAY MODE
REPEAT
FADER
TIME/TEXT
0
)
0
1
2
3
4
5
6
7
8
9
EDIT/
TIME FADE
CHECK
CLEAR
 P
ENTER
OPEN/CLOSE
   §
PLAY ·
STOP p
10
11
12
18
20
ALL lit
Partial lighting 1
Partial lighting 2
Button No.
Displayed
Button No.
Displayed
Button
2
4
6
8
10
12
14
16
18
20
(Partial lighting 2)
• Audio check
• Initial setting of digital filter and release of mute.
• When the TP51 (AFADJ) terminal on MAIN board is set to
HIGH (VDD), emphasis turns on. When set to LOW (Ground),
it turns off.
A B C D E F
 (Partial lighting 1)
88 TOTAL  88
Display of 
counting
Display of 
button number 
Â
Â
(Partial lighting 3)
(Partial lighting 4)
When you turn the AMS knob clockwise
JOG RIGHT
JOG LEFT
When you turn the AMS knob counter-clockwise
Button
10
Focus bias 8-step up (hexadecimal)
Middle of focus bias up/down turning point
Focus bias optimum point, jitter value
Tracking servo, sled servo off
Tracking gain up
Focus bias 8-step down (hexadecimal)
Immediate readjustment of focus bias
Focus bias 00 point
Tracking servo, sled servo on
Tracking gain down
1
2
3
4
5
6
7
8
9
10
4-2. ADJ MODE
The following operations are performed in the ADJ mode, which is
set by connecting the TP21 (ADJ) terminal to the Ground and turning
on the power.
• During playback, there is no problem even if the GFS is continu-
ously LOW.
• High speed search is prohibited during access.
• During playback, the gain of focus servo and spindle servo does
not decrease.
• Servo related manual operations and measurement can be per-
formed.
(For details of operations, refer to Table of Key Operations in
ADJ Mode.)
4-3. CLV-S MODE
The spindle servo for playback sets into the CLV-S mode when the
TP21 (ADJ) terminal is connected to Ground after turning on the
power.
TABLE OF BUTTON OPERATIONS IN ADJ MODE
The jitter value display mode can be set after the all-music remaining
number mode using the  TIME/TEXT  button.
The functions of the number buttons are shown in the following
table.
FUNCTIONS OF NUMBER BUTTONS
(With the attached remote commander)
Function
Button
R350
CN305
CN304
TP21
(ADJ)
TP51
(AF ADJ)
 
[MAIN BOARD] — (Component Side) —
4-4. AGING MODE
This unit is equipped with an aging mode to check operations of the
mechanism deck.
• When faults occur:
Aging stops, and the state when aging stopped is displayed on the
fluorescent display tube.
• When no fault has occurred:
Aging is continued repeatedly.
Aging method 1
(When using the aging mode remote controller (J-2501-123-A)):
1. Press the  U  button and turn ON the power.
2. Set the disc on the tray.
3. Press the  AGING START  button of the aging remote
controller.
4. Aging starts and the message shown in Fig. 1 is displayed on
the fluoresent display tube.
5. To end, press the  U  button.
Aging method 2 (When no aging mode remote controller):
1. Press the  U  button and turn ON the power.
2. Set the disc on the tray.
3. Press the  
§ OPEN/CLOSE  button,  p  button, and
MUSIC SCAN  button at the same time. (If these buttons are
not pressed at the same time, nothing performs.)
4. Aging starts and the message shown in Fig. 1 is displayed on
the fluoresent display tube.
5. To end, press the  U  button.
Display when
normal
State
0
1
2
3
4
5
6
Load in
Access to TOC
Access to last track
Playback of last track
(3 seconds)
Access to first track
Playback of first track
(3 seconds)
Load out
Code
No.
Display when
abnormal
AGING-0
AGING-1
AGING-2
Counter
display
AGING-4
Counter
display
AGING-6
ERROR-0
ERROR-1
ERROR-2
ERROR-3
ERROR-4
ERROR-5
ERROR-6
Fig.1 Message in Aging Mode
11
SECTION 5
ELECTRICAL BLOCK CHECKING
Note:
1.
CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2.
Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3.
Use an oscilloscope with more than 10M
 impedance.
4.
Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
Procedure :
1.
Connect oscilloscope to test point TP (FE) on SERVO board.
2.
Connect between test point TP (FEI) and TP (VC) by lead wire.
3.
Turn  U  (power) switch on.
4.
Put disc (YEDS-18) in and turn  U  (power) switch on again
and actuate the focus search. (actuate the focus search when
disc table is moving in and out.)
5.
Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 3±1
Vp-p.
6.
After check, remove the lead wire connected in step 2.
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.
Procedure :
1.
Connect oscilloscope to test point TP (RF) on SERVO board.
2.
Turn  U  (power) switch on.
3.
Put disc (YEDS-18) in to play the number five track.
4.
Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.
Note: A clear RF signal waveform means that the shape “
” can be
clearly distinguished at the center of the waveform.
Procedure :
1.
Connect oscilloscope to test point TP (TE) on SERVO board.
2.
Turn  U  (power) switch on.
3.
Put disc (YEDS-18) in to play the number five track.
4.
Press the “P (Pause)” button. (Becomes the 1 track jump mode)
5.
Check the level B of the oscilloscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
Procedure :
1.
Connect oscilloscope to test point TP (TE) on SERVO board.
2.
Connect the test point TP21 (ADJ) on MAIN board to the
ground with a lead wire.
3.
Turn the  U  (power) switch on to set the ADJ mode.
4.
Put disc (YEDS-18) in to play the number five track.
5.
Press the “4” button. (The tracking servo and the sledding servo
are turned OFF.)
S-curve waveform
symmetry
A
B
within 3 
±
1Vp-p
0V
level : 1.3 
±
0.6 Vp-p
symmetry
A (DC voltage)
B
Center of the waveform
1track jump waveform
SERVO board
oscilloscope
TP(TE)
TP(VC)
E-F Balance (1 Track Jump) Check
(Without remote commander)
SERVO board
oscilloscope
TP(FE)
TP(VC)
S Curve Check
SERVO board
oscilloscope
TP(RF)
TP(VC)
RF Level Check
SERVO board
oscilloscope
TP(TE)
TP(VC)
E-F Balance (Traverse) Check
(With remote commander)
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns 
level : 1.45 
±
0.25     
 Vp-p
12
8.
Disconnect the lead wire of TP21 (ADJ) connected in step 2.
[MAIN BOARD] — (Component Side) —
2.
Connect the TP21(ADJ) terminal to the Ground and Turn  U
(power) switch on. (ADJ mode)
3.
Put the disc (YEDS-18) in to play the number five track.
Confirm that reading on frequency counter is 4.3218MH
±30kHz.
4.
Disconnect the lead wire of TP1. (ADJ)
Adjustment Location :
6.
Check the level B of the oscilloscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
RF PLL Free-run Frequency Check
Procedure :
1.
Connect frequency counter to test point TP (MNT1) with lead
wire.
7.
Press the “9” button. (The tracking servo and sledding servo
are turned ON.) Confirm the C (DC voltage) is almost equal to
the A (DC voltage) is step 6.
0V
Tracking servo
Sledding servo
         OFF
Tracking servo
Sledding servo
         ON
C (DC 
voltage)
Traverse waveform
0V
B
Center of the waveform
A (DC voltage)
level : 1.3 
±
 0.6 Vp-p
Traverse waveform
R350
CN305
CN304
TP21
(ADJ)
TP51
(AF ADJ)
 
SERVO board
TP (MNT1)
frequency counter
[ SERVO BOARD ]
 
— Side A —
IC101
TP (RF)
TP (FE)
TP (MNT1)
TP (VC)
TP (TE)
TP (FEI)
IC103
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