DOWNLOAD Sony MHC-SV7AV / TA-SV7AV Service Manual ↓ Size: 2.43 MB | Pages: 27 in PDF or view online for FREE

Model
MHC-SV7AV TA-SV7AV
Pages
27
Size
2.43 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
mhc-sv7av-ta-sv7av.pdf
Date

Sony MHC-SV7AV / TA-SV7AV Service Manual ▷ View online

6
TA-SV7AV
3-3.
FRONT  PANEL  SECTION
Note:
 Follow the disassembly procedure in the numerical order given.
3-2.
COVER
2
two screws
(case 3 TP2)
2
two screws
(case 3 TP2)
1
three screws
(BVTT3 
×
 6)
4
Remove the cover
in the direction of arrow 
A
.
A
3
3
4
three screws
(BVTP3 
×
 8)
2
screw
(BVTP3 
×
 8)
6
front panel section
5
two 
claws
5
two claws
5
claw
3
lug
1
wire (flat type) (25 core) (CN104)
3
lug
3
lug
2
screw
(BVTP3 
×
 8)
2
screw
(BVTP3 
×
 8)
7
TA-SV7AV
3-4.
BACK  PANEL (2CH/VCD)  SECTION
3-5.
FRONT  AMP  BOARD
5
three screws
(BVTP3 
×
 8)
5
four screws
(BVTP3 
×
 8)
5
four screws
(BVTP3 
×
 8)
4
RELAY board
3
two connectors
(CN106, 113)
6
connector
(CN105)
7
three connectors
(CN901, 902, 903)
1
screw
(BVTP3 
×
 8)
8
back panel (2CH/VCD) 
section
6
1
screw
(BVTP3 
×
 8)
2
lug
2
screw
(BVTP3 
×
 8)
5
screw
(BVTP3 
×
 8)
4
two screws
(BVTT3 
×
 8)
3
bracket (PWB)
6
lug
8
Remove the FRONT AMP board
in the direction of the arrow.
7
PC board holder
1
three connector
(CN913, 914, 915)
7
PC board holder
8
TA-SV7AV
[GC Test  Mode]
Enter the GC Test Mode
Procedure 1:
1. Press the
I
/1
button to turn the power on.
2. While pressing the both 
[STEREO/MONO]
 *
1
 and 
[CINEMA
STUDIO C]
 buttons, press the 
[CLOCK/TIMER]
 *
1
 button.
3. LEDs and fluorescent indicator tube are all turned on of all
units.
Procedure 2:
1. Press the
I
/1
button to turn the power on.
2. While pressing the both 
[PLAY MODE]
 *
2
 and
x
*
2
 buttons,
press the
Z
 (DISC 1) *
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 
[TUNER MEMORY]
 *
1
 or 
[DISC 1]
 *
2
 button is
pressed, microcomputer or mechanism deck version is dis-
played of each unit.
3. Press the 
[TUNING +]
 *
1
 or 
[DISC   3]
 *
2
 button to detail is
displayed the version.
Key Check Mode
Procedure:
1. Enter the GC test mode.
2. Press the 
[TUNING --]
 *
1
 or 
[DISC 2]
 *
2
 button to set the key
check mode.
3. In the key check mode, the fluorescent indicator tube displays
“K 0 J 0 V 0”. Each time a button is pressed, “K” value in-
creases. However, once a button is pressed, it is no longer taken
into account.
“J” value increases like 1, 2, 3 ... if turn the 
[FILE SELECT]
knob clockwise, or it decreases like 0, 9, 8 ... if turn the JOG
dial counterclockwise.
“V” value increases like 1, 2, 3 ... if turn the 
[VOLUME]
 knob
clockwise, or it decreases like 0, 9, 8 ... if turn the JOG dial
counterclockwise.
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.
SECTION  4
TEST  MODE
Note:
Use following buttons in the test mode.
no mark : Button of amplifier unit (TA-SV7AV)
*1
: Button of tuner unit (ST-SV7)
*2
: Button of CD unit (MCE-SV7)
[MC Test  Mode]
Enter the MC Test Mode
1. Press the
I
/1
button to turn the power on.
2. While pressing the both 
[STEREO/MONO]
 *
1
 and 
[CINEMA
STUDIO C]
 buttons, press the 
[CINEMA STUDIO A]
 button.
3. “GROOVE” indication blinks on the fluorescent indicator tube
in the midst of MC test mode.
4. This mode has two modes (mode 1/mode 2).
5. To change the modes, press three buttons in the same manner
as entering this mode (step 2). Each time the step 2 operation
is repeated, it changes modes alternately.
6. To distinguish the mode, turn the 
[VOLUME]
 knob clockwise
or counterclockwise. Then display is shown as follows.
Mode 1: only “MIN” or “MAX”
Mode 2: “MIN”, “1 to 30” or “MAX”
AMP Test  Mode
In the AMP test mode, it operates as follows.
[VOLUME]
 knob is turned, it changes display as follows.
Counterclockwise : VOLUME MIN
Clockwise
: VOLUME MAX
[FILE SELECT]
 knob is turned, it changes speaker output mode
as follows.
Display of each mode:
Details of each mode:
Mode 1 : L-CH : front L-CH
R-CH : front R-CH
Mode 2 : L-CH : rear L-CH
R-CH : rear R-CH
Mode 3 : L-CH : front L-CH, rear L-CH, center
R-CH : front R-CH, rear R-CH, sub woofer
(no LFE, “EQ” indication does not light up on the fluorescent
indicator tube of tuner unit)
Mode 4 : L-CH : front L-CH, rear L-CH, center
R-CH : front R-CH, rear R-CH, sub woofer
(LFE on, “EQ” indication lights up on the fluorescent indica-
tor tube of tuner unit)
Mode 5 : L-CH : center
R-CH : sub woofer
Releasing the MC Test Mode
To release from this mode, press the
I
/1
button or disconnect the
power cord.
Mode No.
Display
1
L: L
R: R
2
L: SL
R: SR
3
L: LSLC
R: RSRW
4
L: LSLC
R: RSRW
5
L: C
R: W
10
TA-SV7AV
SECTION  5
DIAGRAMS
5-1.
NOTE  FOR  PRINTED  WIRING  BOARDS  AND  SCHEMATIC  DIAGRAMS
B
These are omitted.
C
E
Q
Note on Printed Wiring Boards:
X
: parts extracted from the component side.
Y
: parts extracted from the conductor side.
f
: internal component.
: Pattern from the side which enables seeing.
• Indication of transistor.
Note on Schematic Diagram:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise
specified.
f
: internal component.
2
: nonflammable resistor.
5
: fusible resistor.
C
: panel designation.
A
: B+ Line.
B
: B– Line.
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : Power on
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
: AUDIO
N
: MIC
• Abbreviation
EA
: Saudi Arabia model
SP
: Singapore model
TH
: Thailand model
Note: The components identified by mark 
0
 or dotted line
with mark 
0
 are critical for safety.
Replace only with part number specified.
• Circuit Boards Location
AC OUTPUT board
SURROUND AMP board
SUB TRANS board
AC INPUT board
RELAY board
FRONT AMP board
PANEL board
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