DOWNLOAD Sony SLV-798HF / SLV-998HF Service Manual ↓ Size: 6.91 MB | Pages: 82 in PDF or view online for FREE

Model
SLV-798HF SLV-998HF
Pages
82
Size
6.91 MB
Type
PDF
Document
Service Manual
Brand
Device
VCR
File
slv-798hf-slv-998hf.pdf
Date
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6-6
2-5-3. Overall Output Level and Distortion Factor
Check
Mode
Self-record playback
Signal
400Hz, –7.5dBs : CJ570
Measurement point
CJ570
Measuring instrument
Audio level meter and Distortion
meter
Specified value
Playback Level: –7.5 
±
 3dBs
Distortion: 4.0% or less
[Check Method]
1)
Input signal of 400Hz and –7.5dBs to the audio input.
2)
Record signal.
3)
Playback the recorded portion.
4)
Check that the output level is –7.5 
±
 3dBs.
5)
Check that the distortion factor is 4.0% or less.
2-5-4. Overall Noise Level Check
Mode
Self-record playback
Signal
No signal (Insert a shorting plug into
the Audio LINE IN terminal)
Measurement point
CJ570
Measuring instrument
Audio level meter
Specified value
– 45.5dBs or less
[Check Method]
1)
Record.
2)
Playback recorded portion.
3)
Check that noise level is – 45.5dBs or less.
2-6.
TUNER SYSTEM ADJUSTMENT
2-6-1. Separation Adjustment (MA-318 Board)
Mode
E-E
Signal
RF signal
  Video : Color bar
white (100%) modulation
  Audio : L: 400Hz, R: 2kHz
30% modulation
  Electrical field:
60-80dBm/75
Ω
 terminated
Measuring instrument
Audio level meter
Measuring point
LINE OUT L
Adjusting element
RV731
Specified value
2kHz component minimum
[Adjustment Method]
1)
Connect an audio level meter to LINE OUT L channel via HPF.
2)
Feed the RF signal from RF IN terminal.
3)
Adjust with RV731 so that the output level satisfies the specified
value.
2-7. ADJUSTING PARTS LOCATION DIAGRAM
MA-318 BOARD (CONDUCTOR SIDE)
6-8E
4
1
CN261
RF SW POS
AF SW POS
CN341
AF SW POS
24
1
25
40
80
65
41
64
Vid
eo
 S
ys
te
m
Ad
j
JS161
RF SW POS
AF SW POS
CJ570
LINE IN/OUT
IC
20
1
SW12V
IC601
1
SW5V
Q603
E
3
1
MTR12V
E
Q605
SEPARATION
RV731
4
7-1
SLV-798HF/998HF
SECTION 7
REPAIR PARTS LIST
7-1. EXPLODED VIEWS
NOTE:
•
-XX, -X mean standardized parts, so they may
have some differences from the original one.
•
Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
•
The mechanical parts with no reference number
in the exploded views are not supplied.
•
Hardware (#mark) list is given in the last of
this parts list.
The components identified by mark 
!
or
dotted line with mark 
!
 are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
!
 sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifié.
21
23
24
22
1
2
3
4
5
6
7
7
8
9
10
11
13
14
15
15
15
15
16
20
SLV-798HF
SLV-998HF
19
15
15
not supplied
not supplied
Ref. No.
Part No.
Description
Remarks
Ref. No.
Part No.
Description
Remarks
1
3-979-310-01 RING (AV), JOG
2
3-979-309-01 BUTTON (AV), CENTER
3
X-3947-898-2 PANEL ASSY, FRONT (798HF)
3
X-3947-899-2 PANEL ASSY, FRONT (998HF)
* 4
A-6791-466-A JK-159 BOARD, COMPLETE
5
3-953-432-01 SPRING (GE), FL
6
3-979-302-02 DOOR (AV), CASSETTE
7
3-710-901-11 SCREW, TAPPING
8
3-979-313-01 CASE, UPPER
! 9
1-777-854-21 CORD, POWER
* 10
A-6791-467-A DM-74 BOARD, COMPLETE
11
1-762-844-21 SWITCH, ROTARY
* 13
A-6791-465-A FR-130(A) BOARD, COMPLETE (798HF)
* 13
A-6791-469-A FR-130(B) BOARD, COMPLETE (998HF)
14
1-783-131-11 CABLE, FLAT (FFM-16)
15
4-921-277-41 SCREW (B2.6X8), TAPPING, BIND
16
4-977-593-21 RING (DIA. 50), ORNAMENTAL (797HF)
19
1-475-554-41 COMMANDER, STANDARD(RMT-V232C)
(798HF)
20
3-709-129-01 COVER, BATTERY (798HF)
21
1-475-605-11 COMMANDER, STANDARD (RMT-V229)
(998HF)
22
3-709-126-01 COVER, BATTERY (998HF)
23
3-973-077-31 RING, CHANGE SPEED (998HF)
24
3-972-850-01 BUTTON, FUNCTION (998HF)
7-1-1. FRONT PANEL ASSEMBLY AND UPPER CASE SECTION
7-2
#1
#2
Not supplied
Q102
Q101
#1
#1
51
51
57
52
54
57
55
56
53
53
57
Ref. No.
Part No.
Description
Remarks
Ref. No.
Part No.
Description
Remarks
51
3-979-314-01 BASE (R), MD
* 52
A-6791-464-A MA-318(A) BOARD, COMPLETE (798HF)
* 52
A-6791-468-A MA-318(B) BOARD, COMPLETE
(998HF; US, Canadian, Mexican)
* 52
A-6791-541-A MA-318(B) BOARD, COMPLETE
(998HF; Chilean, PX)
53
3-960-273-01 SPACER, TOP END
! 54
1-468-281-11 POWER BLOCK SR801 (EXCEPT Chilean, PX)
! 54
1-468-282-11 POWER BLOCK SR709 (Chilean, PX)
* 55
3-979-564-01 PANEL, REAR
56
1-779-725-11 CONNECTOR, BOARD TO BOARD 5P
57
3-970-608-21 SUMITITE (B3), +BV
Q101
8-729-043-84 TRANSISTOR   PT380F3
Q102
8-729-043-84 TRANSISTOR   PT380F3
7-1-2. CHASSIS SECTION
Note :
The components identified by
mark 
!
 or dotted line with mark
!
 are critical for safety.
Replace only with part number
specified.
Note :
Les composants identifiés par
une marque 
!
 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
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