Sony SLV-469 / SLV-478 / SLV-677HF / SLV-678HF / SLV-688HF / SLV-L47 / SLV-L48 / SLV-L57 / SLV-L58 / SLV-L67HF / SLV-L68HF / SLV-L77HF / SLV-L78HF / SLV-X50 / SLV-X60HF Service Manual ▷ View online
5-2
5-3. SYSTEM CONTROL — SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE
(MA-317 board IC160)
5-4. SYSTEM CONTROL AND RF MODULATOR — INPUT SELECTION BLOCK
INTERFACE (MA-317 board IC160)
5-5. SYSTEM CONTROL — VIDEO/RP BLOCK INTERFACE (MA-317 board IC160)
5-6. SYSTEM CONTROL — AUDIO BLOCK INTERFACE (MA-317 board IC160)
*1.
Synchronized with drum rocation. 30Hz 50% duty pulse.
*2.
Normal “L”. “H” when video signal is not rgenerated.
*3.
Composite sync signal (positive).
Signal
ANT SEL
Pin No.
MA-317 Board
IC160 @¡
IC160 @¡
I/O
O
I/O level
“L” when RF modulator through.
Signal
RF SWP
QVD
REC P
C SYNC
Pin No.
MA-317 Board
IC160 !•
MA-317 Board
IC160 !£
MA-317 Board
IC160 $ª
MA-317 Board
IC160 *¢
IC160 !•
MA-317 Board
IC160 !£
MA-317 Board
IC160 $ª
MA-317 Board
IC160 *¢
I/O
O
O
O
I
PB
*1
*2
L
*3
REC
*1
L
L
*3
REC
PAUSE
*1
L
H
*3
TAPE
UNLOADING
*1
L
L
*3
TAPE
LOADING
*1
L
L
*3
STOP/FF
/REW
*1
L
L
*3
Signal
RESET
I2C DATA1
I2C CLOCK1
I2C DATA VIDEO
I2C CLOCK VIDEO
(RP) S OUT1
(RP) S CLK1
Pin No.
MA-317 Board
IC160 $£
MA-317 Board
IC160 @™
MA-317 Board
IC160 !¶
MA-317 Board
IC160 %™
MA-317 Board
IC160 %¡
MA-317 Board
IC160 ^∞
MA-317 Board
IC160 ^¶
IC160 $£
MA-317 Board
IC160 @™
MA-317 Board
IC160 !¶
MA-317 Board
IC160 %™
MA-317 Board
IC160 %¡
MA-317 Board
IC160 ^∞
MA-317 Board
IC160 ^¶
I/O
I
I/O
O
I/O
O
I/O
O
I/O level
Normally “H”. “L” when service interruption detected or restored.
Serial communication data to audio microprocessor and
EEPROM I2C161.
Serial communication clock to audio microprocessor and
EEPROM I2C161.
EEPROM I2C161.
Serial communication clock to audio microprocessor and
EEPROM I2C161.
Serial communication data to video microprocessor.
Serial communication clock to video microprocessor.
Serial communication data to RP microprocessor.
Serial communication clock to RP microprocessor.
Signal
A MUTE
Pin No.
MA-317 Board
IC160 $•
IC160 $•
I/O
O
PB
L
REC
L
REC
PAUSE
H
TAPE
UNLOADING
L
TAPE
LOADING
L
STOP/FF
/REW
L
5-3E
5-7.
SER
V
O
/SYSTEM CONTR
OL MICR
OPR
OCESSOR (MA-317 BO
ARD IC160)
Pin.No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Signal
—
—
TU AFT
FUNC KEY 2
FUNC KEY 1
SSENS
TSENS
VIDEO RF
AF ENV
—
—
STEREO
QVD
REMOCON
F MONO
CAP R
V
S
I2C CLOCK 1
RF SWP
AF SWP
END LED
ANT SEL
I2C D
A
T
A
1
PLL CLK
PLL EN
ABLE
SAP
MODE 4
MODE 3
MODE 2
MODE 1
RECPRF
DEST1
DEST2
DEST3
NUB
NUA
CLSEL
VCC
16 MHz (in)
16 MHz (out)
VSS
32 kHz (in)
32 kHz (out)
RESET
—
MAIN/SAP
CBC ON
—
AMUTE
REC P
REC
I/O
—
—
I
I
I
I
I
I
I
—
—
I
O
I
O
O
O
O
O
O
O
I/O
O
O
I
I
I
I
I
I
I
I
I
I
I
I
I
I
O
I
I
O
I
—
O
O
—
O
O
O
Function
—
—
T
uner analo
g
AFT input
k
ey input
k
ey input
T
ape end sensor
T
ape top sensor
V
ideo RF input
HiFi envelope
—
—
T
uner ster
eo detection input L:
Stereo
Quasi VD
Infrared ray catcher
Forced mono
Capstan reverse
I2C clock (EEPROM, HiFi, PLL MOD)
RF switching pulse
HiFi switching pulse
End sensor LED output
TV/VTR RF modulator
I2C da
ta (EEPR
OM, HiF
i,
PLL MOD)
T
uner PLL c
loc
k
T
uner enable
SAP discrimination
Cam encoding data 4
Cam encoding data 3
Cam encoding data 2
Cam encoding data 1
Mis-record prevention switch signal input
Destination discrimination input 1
Destination discrimination input 2
Destination discrimination input 3
Ground
Ground
5V
5V
16MHz
16MHz
Ground
32kHz
32kHz
Reset signal input
—
MAIN/SAP judge signal out
Cable box control signal output
—
Audio mute
HiFi audio record control
Audio record control L: Playback
Pin.No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Signal
I2C CLOCK
VIDEO
I2C D
A
T
A
VIDEO
T
A
MUTE
DMS UP
DMS DOWN
P CONT M12
—
CW
P CONT SW12
—
—
—
—
OSD CS
SOUT 1
FLD CS
SCLK 1
SOUT 0
SIN 0
SCLK 0
—
BUZZER
SIRCS OUT (CBC)
MAIN/SAP
PF
AIL
WP
CAP ERR
DRUM ERR
SREEL
TREEL
—
CHECK
—
CSYNC
CAPFG
DRMPG
DRMFG
AMP VSS
AMP VREF
OUT
AMP VREF
IN
CTLIN-
CTLIN+
CTL SWOUT
CTL
AMP IN
AMPC
CTL VSS
CTL
AMP OUT
AMPVCC
AV
C
C
PLL D
A
T
A
I/O
O
O
O
I
I
O
—
I/O
O
—
—
—
—
O
O
O
O
O
I
O
—
I/O
O
O
I
O
O
O
I
I
—
I
—
I
I
I
I
I
O
I
I/O
I/O
O
I
I
I
O
I
I
O
Function
I2C c
lock (V
ideo)
I2C da
ta (V
ideo)
T
uner
-audio m
ute
DMS control
DMS control
Motor 12V control
—
Cam motor control 2
SW 12V control
—
—
—
—
OSD chip select
Serial out Ch1 (RP)
Fluorescent display driver chip select
Serial clock Ch1 (RP)
Serial out Ch0 (FLD, OSD)
Serial in Ch0 (FLD, OSD)
Serial clock Ch0 (FLD, OSD)
—
Buzzer
Remote control signal output (CBC)
MAIN/SAP select
Po
wer f
ail detection input
EEPR
OM wr
ite pr
otect
Capstan error output
Drum error output
Supply reel sensor
T
ak
e-up r
eel sensor
—
Check input
—
Composite sync signal input
Capstan FG signal input
Drum PG signal input
Drum FG signal input
CTL amp
CTL amp
CTL amp
CTL signal I/O
CTL signal I/O
CTL amp
CTL amp
CTL amp
CTL amp
CTL amp
CTL amp
AN5V
T
uner PLL da
ta
6-1
SECTION 6
ADJUSTMENTS
SLV-478/677HF/678HF/688HF/L47/L48/L57/
L58/L67HF/L68HF/L77HF/L78HF/X50/X60HF
6-1 MECHANICAL ADJUSTMENTS
For the mechanical adjustments, please refer to the
“VHS MECHANICAL ADJUSTMENT MANUAL
(S MECHANISM)” (9-921-647-11).
“VHS MECHANICAL ADJUSTMENT MANUAL
(S MECHANISM)” (9-921-647-11).
6-2. ELECTRICAL ADJUSTMENTS
HiFi model:
SLV-677HF/678HF/688HF/L67HF/L68HF/
L77HF/L78HF/X60HF
L77HF/L78HF/X60HF
Mono model:
SLV-478/L47/L48/L57/L58/X50
See the adjusting part location diagram from on page 6-8
for the adjustment.
for the adjustment.
2-1.
PREPARATION BEFORE ADJUSTMENT
2-1-1. Equipment Required
The measuring instruments used for this alignment include:
1)
1)
Monitor TV
2)
Oscilloscope, dual-trace, bandwidth of 30MHz or more, with
delay mode (A probe 10:1 should be used unless otherwise
specified.)
delay mode (A probe 10:1 should be used unless otherwise
specified.)
3)
Frequency counter
4)
Pattern generator
5)
Digital voltmeter
6)
Audio generator
7)
Audio level meter
8)
Audio distortion meter
9)
Audio attenuator
10) Alignment tapes
KRV-51N2
Part No.: 8-192-605-32
2-1-2. Equipment Connection
Unless otherwise specified, connect and adjust the measuring
instruments as shown in the following diagram.
instruments as shown in the following diagram.
Fig. 6-2-1.
2-1-3. Input Signal Check
Video signal produced by a pattern generator is used as an adjustment
signal to perform electrical alignment for this unit. This video signal
must satisfy the specification.
signal to perform electrical alignment for this unit. This video signal
must satisfy the specification.
Unless otherwise specified, place the switches and controls of this
unit in the following positions:
•
unit in the following positions:
•
INPUT SELECT switch ............................. LINE or LINE 1
(Remote commander)
Connect an oscilloscope to the Video Input terminal. Check that the
synchronizing signal of the Y signal has an amplitude of
approximately 0.7V and that the burst signal has an amplitude of
approximately 0.3V and its waveform is flat. And check that the
level ratio of burst signal to “red” signal is 0.30 : 0.66. The video
signal (color bar) used for electrical aligning this unit is shown in
Fig. 6-2-2.
synchronizing signal of the Y signal has an amplitude of
approximately 0.7V and that the burst signal has an amplitude of
approximately 0.3V and its waveform is flat. And check that the
level ratio of burst signal to “red” signal is 0.30 : 0.66. The video
signal (color bar) used for electrical aligning this unit is shown in
Fig. 6-2-2.
Fig. 6-2-2. Color Bar Signals of Pattern Generator
2-1-4. Alignment Tape
• Contents of KRV-51N2
White (100%)
About 0.7 V
About
0.3 V
0.3 V
Horizontal sync signal
Red
Burst signal
(It must be flat.)
(It must be flat.)
About
0.3 V
0.3 V
1
2
3
4
Mode
SP
EP
Period
7 minutes
3 minutes
7 minutes
3 minutes
Video signal
Color bar
Monoscope
Color bar
Monoscope
Audio signal
Hi-Fi
400Hz
Normal
400Hz
VIDEO LINE IN
VIDEO LINE OUT
Video output
(75
Ω
)
Pattern generator
VCR
Monitor TV
6-2
2-1-5. Input/Output Levels and Impedance
Video input:
LINE IN
Input signal: 1Vp-p, 75ohms, unbalanced,
sync negative
Input signal: 1Vp-p, 75ohms, unbalanced,
sync negative
Video output: LINE OUT
Output signal: 1Vp-p, 75ohms, unbalanced,
sync negative
sync negative
Audio input:
LINE IN
Input level: –7.5 dBs
(0dBs= 0.775Vrms)
Input impedance: more than 47 kilohms
Input level: –7.5 dBs
(0dBs= 0.775Vrms)
Input impedance: more than 47 kilohms
Audio output: LINE OUT
Standard level: –7.5dBs at load impedance 47
kilohms
Output impedance: less than 10 kilohms
kilohms
Output impedance: less than 10 kilohms
2-1-6. Adjustment Sequence
The adjustments should be performed in the following sequence.
2-2.
POWER SUPPLY CHECK
2-2-1. Output Voltage Check (MA-317 Board)
Mode
E-E
Measuring Instrument
Digital voltmeter
SW 12V Check
Measurement point
IC601 pin 2
Specified value
12.0 ± 0.3V
MTR12V Check
Measurement point
Q605 C
Specified value
13.5 ± 1.0V
SW5V Check
Measurement point
Q603 E
Specified value
5.1 ± 0.3V
[Check Method]
1)
1)
Each of these supply voltages must meet its specified value.
Power Supply Check
Servo System Adjustments
Video System Adjustments
Audio System Adjustments
Tuner System Adjustments
Click on the first or last page to see other SLV-469 / SLV-478 / SLV-677HF / SLV-678HF / SLV-688HF / SLV-L47 / SLV-L48 / SLV-L57 / SLV-L58 / SLV-L67HF / SLV-L68HF / SLV-L77HF / SLV-L78HF / SLV-X50 / SLV-X60HF service manuals if exist.