DOWNLOAD Sony SCD-XB770 Service Manual ↓ Size: 6.98 MB | Pages: 86 in PDF or view online for FREE

Model
SCD-XB770
Pages
86
Size
6.98 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
scd-xb770.pdf
Date

Sony SCD-XB770 Service Manual ▷ View online

SCD-XB770
10
3-3.
FRONT  PANEL  SECTION
Note:
 Follow the disassembly procedure in the numerical order given.
3-2.
COVER
1
two screws
3
cover
2
two flat head screws (TP)
2
two flat head screws (TP)
4
two washers
(DIA. 3.2)
5
two washers (P)
4
two washers (DIA. 3.2)
2
two flat head screws (TP)
2
loading panel assy
1
Pull out the tray.
(Refer to page 3, HOW TO 
OPEN THE TRAY WHEN 
POWER SWITCH TURNS 
OFF.)
6
two claws
4
connector 
(CN992)
7
front panel section
4
two connector
(CN305, 905)
3
wire (flat type) 
(12 core)
(CN706)
6
two claws
5
seven screws
(BV/RING)
SCD-XB770
11
3-4.
AUDIO  BOARD,  MAIN  BOARD
3-5.
MECHANISM  DECK (CDM66B-DVBU6)
3
five screws
(BVT/RING)
2
four connectors
(CN301, 304, 305, 306)
        
1
two wires 
(flat type) (19 core)
(CN302, 303)
7
AUDIO board
4
screw
(BVTT3
 
×
 
6)
5
two washers (DIA. 3.6)
0
three screws
(BVTT3
 
×
 
6)
6
PC board holder
8
wire (flat type)
(12 core) (CN706)
9
connector
(CN703)
0
screw
(BVTT3
 
×
 
6)
qs
MAIN board
qa
wiring stopper
9
two connectors
(CN704, 707)
8
wire (flat type)
(30 core) (CN708)
6
three screws
(BVTT3
 
×
 
8)
4
wire (flat type) (30 core)
(CN708)
7
mechanism deck
(CDM66B-DVBU6)
2
loading panel assy
5
connector (CN151)
1
Pull out the tray.
(Refer to page 3, HOW TO OPEN THE TRAY 
WHEN POWER SWITCH TURNS OFF.)
3
Push 
the tray.
SCD-XB770
12
3-6.
BASE  UNIT (DVBU-6)
1
screw (DIA. 12), floating
2
– BOTTOM VIEW –
3
base unit (DVBU-6)
base unit (DVBU-6)
cam (66)
13
SCD-XB770
SECTION  4
TEST  MODE
Test Mode Command List
The contents of test mode are as follows.
Note:
Wrong operation in the test mode causes a trouble, thus requiring extreme care.
LINE command (1X): Use mainly for a manufacturing line.
No.
Name
Description
Remarks
05
DSP MON1
XUGF, XPCK, C2PO outputted from IC509 (CD DSP)
Not used for the servicing
06
DSP MON2
MNT0, MNT1, MNT2, MNT3 outputted from IC509 (CD DSP)
Not used for the servicing
07
DSP MON3
RFCK, XPCK, XROF, GTOP outputted from IC509 (CD DSP)
Electrical measurement,
CD CLV jitter measurement
STANDARD command (1X): Use when the servo is applied by manual operation.
No.
Name
Description
Remarks
12
LD ON/OFF
The laser diode is turned on or off
On or off are switched alternately
13
SPIN ON/OFF
The spindle motor is rotated with the regulated voltage
On or off are switched alternately
14
FSRV ON/OFF
The focus servo is turned on or off
On or off are switched alternately
15
TSRV ON/OFF
The tracking servo is turned on or off
On or off are switched alternately
16
CLV ON/OFF
The spindle SLV servo is turned on or off
On or off are switched alternately
Focus and tracking servos must be already turned on
17
SSRV ON/OFF
The sled servo is turned on or off
On or off are switched alternately
Focus, tracking and spindle servos must be already turned on
18
ALL SRV ON
All servos are turned on
19
ALL SRV OFF
All servos are turned off
Stop command in the test mode
This set automatically executes self-diagnosis and various checks
by entering the test mode.
Note:
 This set automatically makes various adjustments according to the
type of disc, thereby not requiring adjustment of the set when parts
were replaced. However, be sure to execute 4-1. IC AND FLUO-
RESCENT DISPLAY TUBE CHECK, 4-2. AUTO CHECK and 4-
7. WAVEFORMS CHECK.
Disc for Test Mode
Various checks of this set require the following discs.
Model
Type 
*
1
Category
Application
MODEL
SATD-S5
12 cm disc
Adjusted value check,
(J-2501-215-A) SL
Reference disc
Operation check,
SATD-S4
Optical waveform check
(J-2501-184-A)
Not specified
DL
12 cm disc
Operation check
PATD-012
Adjusted value check,
(4-225-203-01)
CD
12 cm disc
Operation check,
YEDS-18
Reference disc
Optical waveform check
(3-702-101-01)
Not specified
HYBRID 12 cm disc
Operation check
*1 SL: Single Layer
DL: Dual Layer
Setting Method of Test Mode
Turn the 
[POWER]
 switch on while pressing the 
[        AMS        ]
dial and the 
[MENU]
 button. Release the 
[MENU]
 button and the
[        AMS        ]
 dial in this order when “Test Mode Menu” is
displayed on the fluorescent indicator tube. (If the 
[        AMS         ]
dial is released first, the test mode becomes active but “Test Mode
Menu” is not displayed)
Releasing Method of Test Mode
To release the test mode, turn the 
[POWER]
 switch off.
Selection/Entry of Test Mode
To select and enter the “Test Mode Menu”, operate as follows.
1. Rotate the 
[        AMS        ]
 dial to select the menu, and press
the 
[        AMS        ]
 dial to enter.
2. The test is switched on or off alternately each time the
[        AMS        ]
 dial is pressed.
3. To return to the previous step, rotate the 
[        AMS        ]
 dial
to select the desired item, and press the 
[        AMS        ]
 dial
to enter.
l
L
l
L
l
L
l
L
l
L
l
L
l
L
l
L
Ver 1.1 2001.07
Page of 86
Display

Click on the first or last page to see other SCD-XB770 service manuals if exist.