Sony SLV-ED8KR / SLV-ED9KR Service Manual ▷ View online
7-5
7-6 E
4. Overall Level Characteristic and Distortion Factor
Check
Purpose:
Check the record level, play level, and distortion factor against the
reference input.
Check the record level, play level, and distortion factor against the
reference input.
Mode
REC and PB (SP mode)
Signal
400 Hz, –7.5 dBs
Measurement point
Audio output terminal
Measurement equipment
Audio level meter and
distortion factor meter
distortion factor meter
Specified value
Playback level: –7.5 ± 4 dBs
Distortion factor: 4% or less
Distortion factor: 4% or less
Confirmation Method:
1) Supply an audio signal of 400 Hz, –7.5 dBs simultaneously to
1) Supply an audio signal of 400 Hz, –7.5 dBs simultaneously to
both L and R channels of Audio Line Input.
2) Make recording
3) Play back a recorded portion.
4) Confirm that a playback level is –7.5 ± 4 dBs.
5) Confirm that a distortion factor is within 4%.
3) Play back a recorded portion.
4) Confirm that a playback level is –7.5 ± 4 dBs.
5) Confirm that a distortion factor is within 4%.
5. Overall S/N Check
Purpose:
Confirm that the S/N is within the specification.
Confirm that the S/N is within the specification.
Mode
REC and PB (SP mode)
Signal
Short
Measurement point
Audio output terminal
Measurement equipment
Audio noise meter
Specified value
–46.0 dBs or less
Confirmation Method:
1) Connect both L and R channels of audio line input to the GND.
2) Start recording.
3) Play the recorded part to confirm that the noise is below –46.0
1) Connect both L and R channels of audio line input to the GND.
2) Start recording.
3) Play the recorded part to confirm that the noise is below –46.0
dBs.
3-6.
PARTS ARRANGEMENT DIAGRAM FOR ADJUSTMENTS
MA-325 BOARD (Side A)
SR-718 BOARD (Side A)
RV201
CN201
6V ADJ
1
9
CN501
CT401
CN341
1
4
2
1
JS161
3-5.
VIDEO SYSTEM ADJUSTMENT
3-5-1.
VCO Oscillation Frequency Adjustment
(MA-325 Board)
(MA-325 Board)
Purpose:
Adjust to set the character position on the screen.
Adjust to set the character position on the screen.
Mode
E-E
Signal
Color bar
Measurement point
Pin @§ of IC401
Measurement equipment
Oscilloscope (DC mode)
Adjusting Element
CT401
Specified value
2.75 ± 0.05 V
V
DD
= 5.0V
1H
2.75
±
0.05V
GND = 0V
Fig. 7-3-6.
3-4-2.
Normal Audio System Adjustment
• Make adjustment in the SP mode, unless otherwise specified.
Use a normal VHS cassette for an adjustment tape.
• Set AUDIO MONITOR to normal.
[Adjustment Sequence]
1. ACE Head Adjustment
2. E-E Output Level Check
3. Frequency Responce Check
4. Overall Level Characteristic and Distortion Factor
1. ACE Head Adjustment
2. E-E Output Level Check
3. Frequency Responce Check
4. Overall Level Characteristic and Distortion Factor
Check
5. Overall S/N Check
1. ACE Head Adjustment
Refer to the service manual of VHS MECHANICAL
ADJUSTMENT VI.
ADJUSTMENT VI.
2. E-E Output Level Check
Purpose:
Confirm that the output level against the reference input is within
the specification.
Confirm that the output level against the reference input is within
the specification.
Mode
E-E
Signal
L, R: 400 Hz, –7.5 dBs
Measurement point
Audio output terminal
Measurement equipment
Audio level meter
Specified value
–7.5 ± 2 dBs
Confirmation Method:
1) Simultaneously input a signal of 400 Hz, –7.5 dBs to both L
1) Simultaneously input a signal of 400 Hz, –7.5 dBs to both L
and R channels of Audio Line Input.
2) Confirm that the audio output level is –7.5 ± 2 dBs.
3. Frequency Responce Check
Purpose:
Confirm that the frequency characteristic is within the specifica-
tion.
Confirm that the frequency characteristic is within the specifica-
tion.
Mode
REC and PB (SP mode)
Signal
400 Hz, –30.0 dBs
7 kHz, –30.0 dBs
7 kHz, –30.0 dBs
Measurement point
Audio output terminal
Measurement equipment
Audio level meter
Specified value
1 ± 4 dB
Tape path adjustment must have been completed.
Confirmation Method:
1) Supply a signal of 400 Hz, –30.0 dBs to both L and R chan-
1) Supply a signal of 400 Hz, –30.0 dBs to both L and R chan-
nels of Audio Line Input.
2) Connect the audio level meter to the Audio Line Output.
3) Adjust the attenuator so that the audio level meter will indi-
3) Adjust the attenuator so that the audio level meter will indi-
cate –30.0 dBs.
4) Make recording in the SP mode.
5) Set an audio line input signal to 7 kHz and make recording.
6) Playback a recorded portion, and measure output levels at 400
5) Set an audio line input signal to 7 kHz and make recording.
6) Playback a recorded portion, and measure output levels at 400
Hz and 7 kHz.
7) Confirm that the 7 kHz playback output level within a range
of the 400 Hz playback output level 1 ± 4 dB.
8-1
NOTE:
• -XX and -X mean standardized parts, so they may
have some difference 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.
should be anticipated when ordering these items.
• The mechanical parts with no reference number in
the exploded views are not supplied.
• Hardware (# mark) list and accessories and pack-
ing materials are given in the last of the electrical
parts list.
parts list.
SECTION 8
REPAIR PARTS LIST
8-1.
EXPLODED VIEWS
SLV-ED8/ED9
The components identified by mark
! or dotted line with mark ! are criti-
! or dotted line with mark ! are criti-
cal for safety.
Replace only with part number speci-
fied.
Replace only with part number speci-
fied.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color
Cabinet's Color
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
11
1-783-849-11 CABLE, FLAT (FMF-30)
* 12
A-6791-701-A FR-137 BOARD, COMPLETE
13
3-710-901-11 SCREW, TAPPING
14
3-977-136-91 CASE, UPPER
* 15
A-6791-626-A DM-77 BOARD, COMPLETE
16
1-762-844-21 SWITCH, ROTARY
17
3-988-327-01 RING (M), JOG
18
3-979-309-11 BUTTON (AV), CENTER
19
1-475-615-11 COMMANDER, STANDARD (RMT-V246)
20
3-709-128-01 COVER, BATTERY (for RMT-V246)
1
X-3948-595-1 PANEL ASSY, FRONT
* 2
3-977-160-01 INSULATOR
3
X-3948-596-1 DOOR ASSY, FRONT
4
3-943-995-01 EMBLEM (NO.5), SONY
5
X-3948-597-1 LOCK ASSY, DOOR
6
3-987-701-01 BUTTON, OPEN
7
3-051-560-01 SPRING, DAMPER
8
4-921-277-41 SCREW (B2.6X8), TAPPING, BIND
9
3-953-432-01 SPRING (GE), FL
* 10
A-6791-628-A IO-64 BOARD, COMPLETE
8-1-1. FRONT PANEL AND CABINET ASSEMBLIES (ED8)
1
18
17
3
4
2
5
8
8
9
6
13
13
19
20
14
12
16
8
10
7
not
supplied
supplied
not
supplied
supplied
not
supplied
supplied
not
supplied
supplied
not
supplied
supplied
8
8
15
8
11
8-2
8-1-2. FRONT PANEL AND CABINET ASSEMBLIES (ED9)
51
3-979-309-01 BUTTON (AV), CENTER
52
3-989-330-01 RING, JOG
53
1-475-836-11 SWITCH BLOCK, CONTROL
54
X-3948-845-1 PANEL ASSY, FRONT
55
3-943-995-01 EMBLEM (NO.5), SONY
56
3-953-432-01 SPRING (GE), FL
57
1-762-844-21 SWITCH, ROTARY
58
4-921-277-41 SCREW (B2.6X8), TAPPING, BIND
59
X-3948-901-1 PLATE (RIGHT) ASSY, FULCRUM
* 60
A-6791-628-A IO-64 BOARD, COMPLETE
61
3-050-306-01 HOLDER, JACK
62
3-973-975-31 DAMPER, OIL
63
1-783-851-11 CABLE, FLAT (FFS-6)
* 64
A-6791-655-A SW-307 BOARD, COMPLETE
* 65
A-6791-653-A DM-77 BOARD, COMPLETE
66
1-783-850-11 CABLE, FLAT (FFD-3)
* 67
A-6791-698-A FR-137 BOARD, COMPLETE
68
1-783-849-11 CABLE, FLAT (FMF-30)
69
3-710-901-11 SCREW, TAPPING
70
3-977-136-91 CASE, UPPER
71
1-475-612-21 COMMANDER, STANDARD (RMT-V244)
72
3-972-850-01 BUTTON, FUNCTION (for RMT-V244)
73
3-973-077-31 RING, CHANGE SPEED (for RMT-V244)
74
3-709-126-01 COVER, BATTERY (for RMT-V244)
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
71
72
73
74
51
52
53
55
63
64
58
62
58
56
54
not
supplied
supplied
not
supplied
supplied
not
supplied
supplied
68
67
58
58
58
58
58
60
61
59
57
70
69
69
65
66
not
supplied
supplied
not
supplied
supplied
not
supplied
supplied
8-3
8-1-3. CHASSIS ASSEMBLY
101
3-979-314-01 BASE (R), MD
102
X-3947-568-1 TC (N17S) ASSY
103
3-979-112-01 SCREW SW (+) BVTP 3X10
* 104
A-6791-591-A NK-11 BOARD, COMPLETE
105
3-970-608-21 SUMITITE (B3), +BV
* 106
A-6791-679-A MA-325 BOARD, COMPLETE (ED8)
* 106
A-6796-659-A MA-325 BOARD, COMPLETE (ED9)
* 107
1-468-311-11 POWER BLOCK (SR-718)
* 108
A-6791-700-A PS-414 BOARD, COMPLETE
! 109
1-782-752-11 CORD, POWER
110
3-987-913-52 PLATE, REAR JACK B
111
3-977-139-91 PANEL, REAR
* 112
A-6791-642-A RJ-79 BOARD, COMPLETE
113
1-766-725-11 CONNECTOR, BOARD TO BOAR 5P
114
3-682-057-11 SPACER (SMALL)
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
The components identified by mark
! or dotted line with mark ! are criti-
! or dotted line with mark ! are criti-
cal for safety.
Replace only with part number speci-
fied.
Replace only with part number speci-
fied.
101
101
not
supplied
supplied
105
112
105
111
110
109
105
#1
not
supplied
supplied
not
supplied
supplied
not
supplied
supplied
105
105
107
106
105
105
104
#1
103
102
113
108
#1
114
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