SONY SA-VF700ED Service Manual download (Page 2 of 24)

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Manual type:Service Manual
Pages:24
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Page 2 of 24
2
SA-VF700ED
Specifications
...........................................................................
1
1.
GENERAL
......................................................................
3
2.
SERVICING NOTES
2-1. Service Position For Power Board
.............................
3
2-2. Service Position For Control Board
...........................
4
2-3. Wire Stopper
...............................................................
4
3.
DISASSEMBLY
3-1. Ring ASSY, Grill Frame (Front) ASSY
......................
5
3-2. Bottom Section
...........................................................
6
3-3. Subwoofer (SP103)
....................................................
7
4.
DIAGRAMS
4-1. Circuit Boards Location
.............................................
9
4-2. Schematic Diagram – Control Section –
..................
10
4-3. Printed Wiring Boards – Control Section –
...............
11
4-4. Schematic Diagram – Power Section –
....................
12
4-5. Printed Wiring Boards
– Power Section (Side A) –
......................................
13
Printed Wiring Boards
– Power Section (Side B) –
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14
5.
EXPLODED VIEWS
5-1. Base Section (L-CH)
................................................
15
5-2. Speaker Section (L-CH)
...........................................
16
5-3. Bottom Section (L-CH)
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17
5-4. Bottom Section (R-CH)
............................................
18
5-5. Speaker Section (R-CH)
...........................................
19
6.
ELECTRICAL PARTS LIST
...................................
20
TABLE OF CONTENTS
SAFETY
CHECK-OUT
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage. Check
leakage as described below.
LEAKAGE
The AC leakage from any exposed metal part to earth Ground
and from all exposed metal parts to any exposed metal part
having a return to chassis, must not exceed 0.5 mA (500
microampers). Leakage current can be measured by any one of
three methods.
1.
A commercial leakage tester, such as the Simpson 229 or
RCA WT-540A. Follow the manufacturers’ instructions to
use these instruments.
2.
A battery-operated AC milliammeter. The Data Precision
245 digital multimeter is suitable for this job.
3.
Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit”
indication is 0.75 V, so analog meters must have an accurate
low-voltage scale. The Simpson 250 and Sanwa SH-63Trd
are examples of a passive VOM that is suitable. Nearly all
battery operated digital multimeters that have a 2V AC range
are suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
0.15
μ
F
To Exposed Metal
Parts on Set
1.5k
AC
voltmeter
(0.75V)
Earth Ground
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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE
0
SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT
DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
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