MCE-SV7, MHC-SV7AV - Sony Audio Service Manual (repair manual)

Model
MCE-SV7 MHC-SV7AV
Pages
52
Size
6.4 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
mce-sv7-mhc-sv7av.pdf
Date

View Sony MCE-SV7 / MHC-SV7AV Service Manual online

SERVICE MANUAL
VIDEO CD/CD PLAYER
E Model
SPECIFICATIONS
MCE-SV7
Ver 1.3  2002.12
MCE-SV7 is the Video CD/CD player
section in MHC-SV7AV.
Model Name Using Similar Mechanism
NEW
CD Mechanism Type
CDM63B
Base Unit Name
BU-30BD61A
Optical Pick-up Name
OP Assy (A-MAX.3)
9-873-155-04
Sony Corporation
2002L0500-1
Home Audio Company
C
 2002.12
Published by Sony Engineering Corporation
VIDEO CD/CD player section
System
Compact disc and digital
audio system
Laser
Semiconductor laser
(
λ
=795 nm)
Emission duration:
continuous
Frequency response
2 Hz – 20 kHz (
±
0.5 dB)
Signal-to-noise ratio
More than 90 dB
Dynamic range
More than 90 dB
Video color system format
NTSC, PAL
OPTICAL OUT
(Square optical connector jack, rear panel)
Design and specifications are subject to change
without notice.
General
Dimensions (w/h/d)
Approx. 280 x 108 x 330 mm
Mass
Approx. 2.8 kg
2
MCE-SV7
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
0
  OR  DOTTED
LINE  WITH  MARK  
0
  ON  THE  SCHEMATIC  DIAGRAMS
AND  IN  THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE
OPERATION.  REPLACE  THESE  COMPONENTS  WITH
SONY  PARTS  WHOSE  PART  NUMBERS  APPEAR  AS
SHOWN  IN  THIS  MANUAL  OR  IN  SUPPLEMENTS  PUB-
LISHED  BY  SONY.
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES  ON  LASER  DIODE  EMISSION  CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
LASER  DIODE  AND  FOCUS  SEARCH  OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board. (within 3 times)
• Be careful not to apply force on the conductor when soldering
or unsoldering.
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
The following caution label is located inside the unit.
3
MCE-SV7
TABLE  OF  CONTENTS
1.
SERVICING  NOTES
...............................................
4
2.
GENERAL
...................................................................
5
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
6
3-2. Cover ...............................................................................
7
3-3. CD Mechanism Deck (CDM63B) ..................................
7
3-4. MAIN Board ...................................................................
8
3-5. Front Panel Section .........................................................
8
3-6. PANEL Board, SUB PANEL Board ...............................
9
3-7. Lid (CD) ..........................................................................
9
4.
TEST  MODE
.............................................................. 10
5.
ELECTRICAL  ADJUSTMENTS
CD Section ...................................................................... 11
VIDEO Section ............................................................... 11
6.
DIAGRAMS
6-1. Block Diagram  – CD SERVO Section – ....................... 12
6-2. Block Diagram  – AUDIO/VIDEO Section – ................ 13
6-3. Block Diagram  – MAIN Section – ................................ 14
6-4. Note For Printed Wiring Boards
and Schematic Diagrams ................................................ 15
6-5. Printed Wiring Board  – BD Section – ........................... 16
6-6. Schematic Diagram  – BD Section – .............................. 17
6-7. Printed Wiring Boards
– CD CHANGER Section – ............................................ 18
6-8. Schematic Diagram  – CD CHANGER Section – ......... 19
6-9. Printed Wiring Boards  – AUDIO/VIDEO Section – ..... 20
6-10. Schematic Diagram
– AUDIO/VIDEO Section (1/3) – .................................. 21
6-11. Schematic Diagram
– AUDIO/VIDEO Section (2/3) – .................................. 22
6-12. Schematic Diagram
– AUDIO/VIDEO Section (3/3) – .................................. 23
6-13. Printed Wiring Boards  – MAIN Section – .................... 24
6-14. Schematic Diagram  – MAIN Section – ......................... 25
6-15. Printed Wiring Boards  – PANEL Section – .................. 26
6-16. Schematic Diagram  – PANEL Section – ....................... 27
6-17. IC Pin Function Description ........................................... 32
7.
EXPLODED  VIEWS
7-1. Cover, Front Panel Section ............................................. 41
7-2. Chassis Section ............................................................... 42
7-3. CD Mechanism Deck Section-1 (CDM63B) .................. 43
7-4. CD Mechanism Deck Section-2 (CDM63B) .................. 44
7-5. Base Unit Section (BU-30BD61A) ................................ 45
8.
ELECTRICAL  PARTS  LIST
............................... 46
4
MCE-SV7
SECTION  1
SERVICING  NOTES
This set is a component of the MHC-SV7AV.
The MHC-SV7AV system configuration is as shown below, and
therefore it does not operate normally unless all four components
are connected.
In performing the repair, connect all components with the system
cables.
Note: The precaution to the users is described on the label stuck
on the back panel (Video CD player) and in the troubleshooting
section in the Operation Manual.
System Configuration:
POWER SUPPLY
AC IN
TA
HTC & VMP 
µ
con
MASTER & GRAPHIC 
µ
con
ST
MCE
TC 
µ
con
TC
DISPLAY
CD-TEXT TEST  DISC
This unit is able to display the test data (character information)
written in the CD on its fluorescent indicator tube.
The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used
for checking the display.
To check, perform the following procedure.
Checking Method:
1. Press the
I
/1
button to turn the power on, set the disc to the
disc table with the “test disc” label facing up, and chuck the
disc.
2. Press the 
[CD]
 button to set CD function, and press the
N
button to playback the disc.
3. The following will be displayed on the liquid crystal display.
Display : 1KHZ/0DB/L R
4. Pressing the 
[--        ]
 or 
[        +]
 button, select the track. The text
data of each track will be displayed.
For details of the displayed contents for each track, refer to “Table
1 : CD-TEXT TEST DISC TEXT Data Contents”.
Restrictions in CD-TEXT Display
In this unit, some special characters will not be displayed prop-
erly. These will be displayed as a space or a character resembling
it.
Table 1 : CD-TEXT TEST DISC TEXT Data Contents
(TRACKS No. 1 to 20:Normal Characters)
1
1kHz/0dB/L&R
2
20Hz/0dB/L&R
3
40Hz/0dB/L&R
4
100Hz/0dB/L&R
5
200Hz/0dB/L&R
6
500Hz/0dB/L&R
7
1kHz/0dB/L&R
8
5kHz/0dB/L&R
9
7kHz/0dB/L&R
10
10kHz/0dB/L&R
11
16kHz/0dB/L&R
12
18kHz/0dB/L&R
13
20kHz/0dB/L&R
14
1kHz/0dB/L&R
15
1kHz/–1dB/L&R
16
1kHz/–3dB/L&R
17
1kHz/–6dB/L&R
18
1kHz/–10dB/L&R
19
1kHz/–20dB/L&R
20
1kHz/–60dB/L&R
TRACK
No.
Displayed Contents
Note:
 Track No. 21 to 99 are not displayed.
.
>
5
MCE-SV7
SECTION  2
GENERAL
This section is extracted from
instruction manual.
Parts Identification
The items are arranged in alphabetical order.
Refer to the pages indicated in parentheses ( ) for details.
m
M
.
H
S
x
>
1
2
3
wk wle;
ea es
ed
ef
eh
ek
r;
eg
ej
el
ra
rs
DISC 1–3 rs (14, 16, 17, 25)
DISC 1–3 indicators ra
DISC 1–3 Z (eject) e; (14–16)
NEXT ek (14, 15)
PLAY MODE wk (14, 16, 17, 25)
PREV r; (14, 15)
REPEAT wl (15, 16)
RETURN O eh (15)
N SELECT (play) el (14–17,
19, 21, 34)
X (pause) ej (14, 16)
x (stop) eg (14–16, 19, 21, 24,
34)
. (go back) ef (14–17, 21,
25)
> (go forward) ed (14–17, 21,
25)
m (rewind) ea (14, 16)
M (fast forward) es (14, 16)
VIDEO CD/CD player
Main unit
x
M
m
>
.
nN
nN
O
V
v
B
b
X
1 2 3 4 5
wh
wj
wl
ed
ea
6
7
9
8
q;
qa
qd
qs
qf
qg
qj
qh
qk
ql
wa
w;
ws
wf
wd
wg
wk
es
eg
ej
ek
el
e;
ef
eh
ra
rd
rg
r;
rs
rf
Remote Control
CHECK qd (17)
CLEAR qs (17, 19)
CLOCK/TIMER SELECT 3
(26, 35)
CLOCK/TIMER SET 2 (13, 25,
34)
DBFB ej (27)
DIGITAL r; (36, 40)
DISPLAY rd (13, 18, 33, 40)
D.SKIP 9 (14, 16, 20, 21)
ENTER wf (11, 13, 15, 17, 21,
22, 25, 26, 30–33, 35)
EQ wh (31)
EQ ON/OFF wa (32)
FILE SELECT +/– wd (27, 28,
32)
FUNCTION el (10, 14–17, 24,
25, 34, 36)
GROOVE ek (27)
KARAOKE PON qk (33)
KEY CONTROL  /  ql (33)
MD rs (36)
Numeric buttons 8 (15, 16, 19,
20, 21)
ON SCREEN wk (18)
PICTURE EFFECT wl (21)
PRESET –/+, PREV/NEXT ea
(14, 15, 20, 22)
REPEAT q; (15, 16)
RETURN O eg (15)
PLAY MODE qa (14, 16, 17, 25)
SELECT CD N es (14–17, 19,
21)
SET UP w; (11, 13, 30, 32, 33)
SLEEP 1 (34)
SPECIAL MENU e; (19, 20, 21)
SPECTRUM ANALYZER rf
(33)
SUR wj (30)
TAPE A nN ef (23)
TAPE B nN qf (23, 24)
TUNER/BAND ed (22)
TUNING –/+ qh (22)
TV CH +/– 7 (10)
TV VOL +/– 6 (10)
TV @/1 4 (10)
TV/VIDEO rg (10)
VIDEO ra (36)
VOL +/– ws
BUTTON DESCRIPTIONS
@/1 (power) 5
X (pause) qj
x (stop) qg
./> (go back/go forward)
ea
m/M (rewind/fast forward)
qh
O/o/P/p wg
 >10 eh
MCE-SV7
6
• This set can be disassembled in the order shown below.
3-1.
DISASSEMBLY  FLOW
SECTION  3
DISASSEMBLY
3-2. COVER
(Page 7)
3-3. CD MECHANISM DECK
(CDM63B)
(Page 7)
3-6. PANEL BOARD,
SUB PANEL BOARD
(Page 9)
3-7. LID (CD)
(Page 9)
3-5. FRONT PANEL SECTION
(Page 8)
3-4. MAIN BOARD 
(Page 8)
SET
MCE-SV7
7
3-3.
CD  MECHANISM  DECK (CDM63B)
Note:
 Follow the disassembly procedure in the numerical order given.
3-2.
COVER
1
two screws
(case 3 TP2)
3
cover
2
screw
(BVTT3 
×
 6)
1
two screws
(case 3 TP2)
3
four screws
(BVTP3 
×
 8)
1
wire (flat type) (25 core)
(CN501)
2
connector
(CN701)
4
CD mechanism deck
(CDM63B)
MCE-SV7
8
3-4.
MAIN  BOARD
3-5.
FRONT  PANEL  SECTION
2
connector
(CN401)
1
wire (flat type) (13 core)
(CN301)
2
two connectors
(CN101, 102)
5
MAIN board
3
screw
(BVTP3 
×
 8)
4
lug
3
screw
(BVTP3 
×
 8)
2
connector
(CN701)
3
two screws
(BVTP3 
×
 8)
2
three screws
(BVTP3 
×
 8)
3
two claws
1
connector
(CN401)
4
front panel section
3
claw
MCE-SV7
9
3-6.
PANEL  BOARD,  SUB  PANEL  BOARD
3-7.
LID (CD)
5
two claws
4
four screws
(BVTP2.6 
×
 8)
6
SUB PANEL board
1
five screws
(BVTP2.6 
×
 8)
3
PANEL board
2
two claws
3
lid (CD)
4
spring (CD)
1
screw
(BVTP2.6 
×
 8)
2
bracket (LID) assy
10
MCE-SV7
SECTION  4
TEST  MODE
Note:
Use following buttons in the test mode.
no mark : Button of video CD unit (MCE-SV7)
*1
: Button of amplifier unit (TA-SV7AV)
*2
: Button of tuner unit (ST-SV7)
[CD Delivery Mode]
• This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.
Procedure:
1. Press the 
I
/
*
1
 button to turn the power on.
2. Turn the 
[FILE SELECT]
 *
1
 knob to set the CD function.
3. While pressing the 
[EQ ON/OFF]
 *
1
 button, press the 
I
/
1
 *
1
button.
4. The message “LOCK” is displayed on the fluorescent indica-
tor tube of tuner unit and turn the power off automatically, and
the CD delivery mode is set.
[GC Test  Mode]
Enter the GC Test Mode
Procedure 1:
1. Press the 
I
/
1
 *
1
 button to turn the power on.
2. While pressing the both 
[PLAY MODE]
 and 
[   ]
 buttons, press
the 
[   ]
 (DISC 1) button.
3. LEDs and fluorescent indicator tube are all turned on of all
units.
Procedure 2:
1. Press the 
I
/
1
 *
1
 button to turn the power on.
2. While pressing the both 
[STEREO/MONO]
 *
2
 and
[CINEMA STUDIO C]
 *
buttons, press the 
[CLOCK/TIMER]
*
2
 button.
3. LEDs and fluorescent indicator tube are all turned on of all
units.
Version Display Mode
Procedure:
1. Enter the GC test mode.
2. Each time the 
[DISC 1]
 or 
[TUNER MEMORY]
 *
2
 button is
pressed, microcomputer or mechanism deck version is dis-
played of each unit.
3. Press the 
[DISC 3]
 or 
[TUNING +]
 *
2
 button to detail is dis-
played the version.
Key Check Mode
Procedure:
1. Enter the GC test mode.
2. Press the 
[DISC 2]
 or 
[TUNING  --]
  *
2
 button to set the key
check mode, and displays “K 0 J 0 V 0” on the fluorescent
indicator tube of tuner unit.
3. All buttons are pressed of video CD unit, all LEDs are blink-
ing of video CD unit. (not change the display of fluorescent
indicator tube)
Releasing the GC Test Mode
To release from this mode, press three buttons in the same manner
as entering this mode or disconnect the power cord.
x
Z
[CD Service Mode]
• This mode can run the CD sled motor optionally. Use this mode,
for instance, when cleaning the optical pick-up.
Procedure:
1. Press the 
I
/
1
 *
1
 button to turn the power on.
2. Turn the 
[FILE SELECT]
 *
1
 knob to set the CD function.
3. While pressing the both 
[PLAY MODE]
 and 
[   ]
 buttons, press
the 
[      ]
 button.
4. Set to the CD service mode.
5. With the CD in stop status, press the 
[      ]
 button to move the
optical pick-up to outside track, or press the 
[     ]
 button to
inside track.
6. To release from this mode, perform as follows.
1) Move the optical pick-up to the most inside track.
2) Disconnect the power cord.
Notes:
• Always move the optical pick-up to most inside track when
releasing from this mode. Otherwise, a disc will not be un-
loaded.
• Do not run the sled motor excessively, otherwise the gear can
be chipped.
[CD Cancellation Mode of Repeat Limitation]
• This mode can cancel the CD repeat limitation (5 times).
Procedure:
1. Press the 
I
/
1
 *
1
 button to turn the power on.
2. Turn the 
[FILE SELECT]
 *
1
 knob to set the CD function.
3. While pressing the both 
[PLAY MODE]
 and 
[   ]
 buttons, press
the 
[REPEAT]
 button.
4. CD repeat limitation is canceled.
5. To release this mode, disconnect the power cord.
x
.
M
m
x

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Here you can view online and download Sony MCE-SV7 / MHC-SV7AV Service Manual in PDF. MCE-SV7 / MHC-SV7AV service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony MCE-SV7 / MHC-SV7AV Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.