Sony SLV-798HF / SLV-998HF Service Manual ▷ View online
5-2
5-4.
SYSTEM CONTR
OL — SYSTEM CONTR
OL PERIPHERAL CIRCUIT INTERF
A
CE (MA-318 BO
ARD IC161)
Signal
ASURA
RESET
ASURA
CS
S IN 0
S OUT 0
S CLK
Pin No.
$º
$¢
$∞
$§
$¶
I/O
I
I
I
O
I
I/O Le
vel
Normally “H”, “L” when service interruption is detected or restored.
Chip select signal from timer microprocessor
. V period
“L”
pulse.
Serial communication data fr
om timer micr
opr
ocessor
.
V period “ L”
pulse.
Serial communication data to timer micropr
ocessor
.
V period
“L”
pulse.
Serial communication clock fr
om timer micr
opr
ocessor
.
V period “L”
pulse.
5-5.
SYSTEM CONTR
OL — A
UDIO BLOCK INTERF
A
CE (MA-318 BO
ARD IC161)
*1.
30 Hz 50 % duty pulse approx. 5 msec delayed from RF SW P
.
5-3.
SYSTEM CONTR
OL — MECHANISM INTERF
A
CE (MA-318 BO
ARD IC161)
*1.
Uncertainly
.
*2.
“L” when erasing protection tab is bent. “H” when not bent.
*3.
P
ause of period in proportion to reel rotating speed.
*4.
Approx. 2 msec period “H” pulse.
*5.
Pulse at tape running.
*6.
Normally “L”. 2 msec period “H” pulse when tape top or tape end is detected.
Signal
CAM2
MODE 1 (*8)
MODE 2 (*8)
MODE 3 (*8)
MODE 4 (*8)
(IN REC PRF)
T REEL FG
S REEL FG
T/E LED
CAP ST
OP
CAP R
V
S
T SENS
S SENS
Pin No.
9
@™
@¡
@º
!ª
!∞
^¢
^£
#™
#∞
&™
^¡
^™
I/O
HI-Z
I
I
I
I
I
I
I
O (O.D)
O (O.D)
O
I
I
EJECTED
L
H
H
L
L
H
H/L
H/L
*4
L
H
*4
*4
CASSETTE
LO
ADING
H
L
L
L
H
*2
H/L
H/L
*4
L
*4
*4
CASSETTE
UNLO
ADING
L
L
L
L
H
*2
H/L
H/L
*4
L
*4
*4
T
APE
THREADING
H
*1
*1
*1
*1
*2
H/L
*3
*4
H
L
*6
*6
T
APE
UNTHREADING
L
*1
*1
*1
*1
*2
H/L
*3
*4
H
H
*6
*6
ST
OP
*7
H
H
H
L
*2
H/L
H/L
*4
L
H/L
*6
*6
FF
*7
H
H
L
H
*2
*3
*3
*4
H
L
*6
*6
REW
*7
H
H
L
H
*2
*3
*3
*4
H
H
*6
*6
PB
*7
H
L
L
H
*2
*3
*3
*4
H
L
*6
*6
PB P
A
USE
*7
H
L
L
L
*2
H/L
H/L
*4
L
L
*6
*6
SLO
W
*7
H
L
L
L
*2
*3
*3
*4
*5
L/*5
*6
*6
x 2
*7
H
L
L
L
*2
*3
*3
*4
H
L
*6
*6
CUE
*7
H
L
L
L
*2
*3
*3
*4
H
L
*6
*6
REVIEW
*7
L
L
H
L
*2
*3
*3
*4
H
H
*6
*6
REC
*7
H
L
L
L
*2
*3
*3
*4
H
L
*6
*6
REC
PA
U
S
E
*7
H
L
L
L
*2
H/L
H/L
*4
L
L
*6
*6
*7.
When transition to UNLO
ADING direction : “L
”.
When transition to LO
ADING dir
ection : “H”.
When CAM MO
T
OR is stopped : Hi-Z.
*8.
When R
V
S slo
w : Mode 1=”L
”
When R
V
S slo
w : Mode 2=”L
”
When R
V
S slo
w : Mode 3=”H”
When R
V
S slo
w : Mode 4=”L
”
Signal
AF
ENV
A
MUTE
AF REC P
AF
SWP
FULL ERS
Pin No.
%ª
#¡
2
`⁄‚‚
#§
I/O
I
O (O.D)
O
O
O (O.D)
ST
OP/FF/
REW
L
L
*1
H
T
APE
LO
ADING
L
L
*1
H
T
APE
UNLO
ADING
L
L
*1
H
PB
*1
L
*1
H
PB P
A
USE
H
L
*1
H
SLO
W
H
L
*1
H
x 2
H
L
*1
H
CUE
H
L
*1
H
REVIEW
H
L
*1
H
REC
L
H
*1
L
REC P
A
USE
L
L
*1
H
AF RF en
v
elope signal input terminal for automatic tr
ac
king
.
5-3
5-6. SERVO/SYSTEM CONTROL MICROPROCESSOR PIN FUNCTIONS
(MA-318 BOARD IC161)
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
Pin Name
RF SWP
AF REC P
N.C.
QVD
AUTO PRESET
FE ON
REC CTL
CTL RESET
CAM 2
N.C.
TA MUTE
S-VHS
NT JUDGE
MESECAM DET
CIN (REC PRF)
AV CONT
SECAM ON
SW1
MODE 4
MODE 3
MODE 2
MODE 1
POWER SAVE
CONT 1
POWER SAVE
C+
MOD CONT
TV/VTR
N.C.
SDA 0
N.C.
SCL 0
A MUTE
T/E LED
N.C.
N.C.
CAP STOP
FULL ERS
N.C.
N.C.
MP
ASURA RESET
VSS
XTAL
EXTAL
ASURA CS
S IN 0
S OUT 0
SCLK
NICOL ON
CBC POWER
F. MONO
I/O
O
O
—
O
O
O
O
O
I
—
O
I
I
I
I
O
—
—
I
I
I
I
O
O
O
O
—
I/O
—
I/O
O
O
—
—
O
O
—
—
I
I
—
O
I
I
I
O
I
O
O
O
Function
RF switching pulse output.
“H” when HiFi audio REC.
Not used.
Quasi VD pulse output.
“H” during auto preset.
Flying erase ON/OFF
REC CTL signal output.
Capstan current control. “H” during
slow mode.
Cam motor control.
Not used.
Tuner audio mute. H: Mute
Not used.
Not used.
Not used.
Erasing protection tab, cassette in
detection signal input.
Not used.
Not used.
Not used.
Cam encoder signal input.
Cam encoder signal input.
Cam encoder signal input.
Cam encoder signal input.
Not used.
Not used.
Not used.
TV/VTR control signal output.
Not used.
I
2
C data.
Not used.
I
2
C clock.
“H” when audio mute.
Tape top/end sensors driver.
Not used.
Not used.
Capstan stop signal output.
Full erase control.
Not used.
Not used.
Fixed to “L”.
System reset signal.
Ground.
System clock 16MHz.
System clock 16MHz.
Servo/system control microcomputer
chip select signal.
Serial communication signal.
Serial communication signal.
Serial communication signal.
NICOL control signal out.
Cable box control signal out.
Forced mono.
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
Pin Name
SW2
AVSS
AVREF
AVDD
NTPB SW
AV ADJ
FOLLOW TV
N.C.
AF ENV
RF ENV
T SENS
S SENS
S REEL FG
T REEL FG
N.C.
VSYNC
PB CTL
DRM PG
DRM FG
CAP FG
BLUE BACK
ON
CAP RVS
CAP DA
DRM DA
N.C.
N.C.
REC COUNT
C PLUS DET
N.C.
DATA (SSB)
CLOCK (SSB)
N.C.
N.C.
CAP TRQ PWM
N.C.
N.C.
N.C.
VSS
VDD
5V
N.C.
CTL HYS HIGH
N.C.
N.C.
N.C.
AF REC
N.C.
N.C.
STEP PLS
AF SWP
I/O
O
—
—
—
I
I
I
—
I
I
I
I
I
I
—
I
I
I
I
I
O
O
O
O
—
—
I
O
—
O
O
—
—
O
—
—
—
—
—
—
—
O
—
—
—
O
—
—
O
O
Function
Not used.
Unswitched ground.
AD port reference input UNSW 5V.
UNSW 5V.
Not used.
Adjustment mode.
Not used.
Not used.
HiFi audio playback signal envelope.
Video playback signal envelope.
Take-up end sensor.
Supply end sensor.
Supply reel FG input.
Take-up reel FG input.
Not used.
Composite sync. signal input.
Playback CTL input.
Drum PG input.
Drum FG input.
Capstan FG input.
Not used.
Capstan reverse control “H” when
reverse.
Capstan error D/A output.
Drum PG output.
Not used.
Not used.
Counter signal input when recording.
Not used.
Not used.
Serial communication data.
Serial communication clock.
Not used.
Not used.
PWM output for capstan torque
control.
Not used.
Not used.
Not used.
Ground.
5V.
5V.
Not used.
CTL amp gain control.
Not used.
Not used.
Not used.
“H” output when hifi audio recording.
Not used.
Not used.
Step pulse “H” when capstan step
driving.
AF switching pulse output.
5-4E
Pin No.
50
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
Pin Name
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
NC
NC
NC
NC
NC
NC
GRID6
GRID5
GRID4
GRID3
GRID2
GRID1
VDD
TX
TEX
NC/VPP
ASURA CS
SYS RESET
POWER CONT 1
POWER CONT 2
CG V
I/O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
I
Function
Segment terminal 7
Segment terminal 8.
Segment terminal 9.
Segment terminal 10.
Segment terminal 11.
Segment terminal 12.
Segment terminal 13.
Segment terminal 14.
Segment terminal 15.
Segment terminal 16.
Non Connect.
Non Connect.
Non Connect.
Non Connect.
Non Connect.
Non Connect.
Grid terminal 6.
Grid terminal 5.
Grid terminal 4.
Grid terminal 3.
Grid terminal 2.
Grid terminal 1.
D5V
Timer clock terminal (32.768kHz).
Timer clock terminal (32.768kHz).
D5V
S/S microcomputer chip select
signal.
System reset output.
Power supply control signal.
Power supply control signal.
Composite sync input.
5-7. TUNER/TIMER MODE CONTROL PIN FUNCTIONS (FR-130 BOARD IC460)
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
Pin Name
N.C.
POWER FAIL
H DET
SIRCS IN
STEREO DET
SW1 SIRCS OUT
BUZZER
N.C.
N.C.
SCK 0
SI 0
SO 0
WP
LANC IN
LANC OUT
A/D 0
A/D 1
A/D 2
A/D 3
A/D 4
N.C.
N.C.
AFT
AVDD
AV REF
SCL 0
CG CS
SDA 0
JOG LED
AVSS
EXTAL
XTAL
VSS
RST
PLL CLK
PLL DATA
PLL ENABLE
MAIN/SAP
SAP DET
V SET CS
DMS 1
DMS 2
VFDP
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
I/O
I
I
I
I
I
O
O
O
O
I
I
O
O
I
O
I
I
I
I
I
I
I
I
O
O
O
O
I
I
O
O
O
O
O
O
I
I
I
O
O
O
O
O
O
Function
Not used.
Power failure detect signal input.
H DET_(TUNER H SYNC detect
input).
Remote control signal (SIRCS)
input.
Stereo judge input.
Remote control signal (SIRCS)
output.
Buzzer signal output.
Not used.
Not used.
Serial communication signal (Serial
clock).
Serial communication signal (Data
input).
Serial communication signal (Data
output).
EEP mode control.
LANC input.
LANC output.
Analog voltage (KEY) input.
Analog voltage (KEY) input.
Analog voltage (KEY) Input.
Analog voltage (KEY) Input.
Analog voltage (KEY) Input.
Not used.
Not used.
AFT (Auto fine tuning signal input).
A/D port reference input.
UNSW 5V.
T BUS (clock) /IIC BUS (clock).
Character generator chip select
signal.
IIC BUS (data).
JOG LED control signal output.
UNSW GND
System clock terminal (16MHz).
System clock terminal (16MHz).
GND
RESET input.
TUNER PLL clock.
TUNER PLL data.
TUNER chip select.
NO USE (MAIN/SAP judge signal
output).
MAIN/SAP judge input.
V SET IC chip select signal.
DMS forward/reverse signal input.
DMS forward/reverse signal input.
VFDP.
Segment terminal 1
Segment terminal 2
Segment terminal 3
Segment terminal 4
Segment terminal 5
Segment terminal 6
6-1
SECTION 6
ADJUSTMENTS
SLV-798HF/998HF
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
See the adjusting parts 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
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