Sony SLV-L56AR / SLV-L76HFAR / SLV-L86HFAR Service Manual ▷ View online
5-4
5-4 E
5-5.
SER
V
O/SYSTEM/TIMER/TUNER CONTR
OL MICR
OPR
OCESSOR PIN FUNCTION (MA-323 BO
ARD IC161)
Pin No.
Pin Name
I/O
Function
1
F
MONO
O
TUNER A
udio select signal
2
AN GND
–
Analog Ground
3
APC ERR
OR
I
APC ERR
OR
V
oltage input
4
DMS UP
I
Clic
k Shuttle f
o
w
ared/re
v
erse signal input (DMS models only)
5
FUNC
. KEY2
I
Function K
e
y Analog v
oltage input
6
TU AFT
I
AFT (A
uto fine tuning signal input)
7
FUNC
. KEY1
I
Function K
e
y Analog v
oltage input
8
P
O
WER F
AIL
I
P
ow
er f
ailure detect signal input
9
DMS DO
WN
I
Clic
k Shuttle f
o
w
ared/re
v
erse signal input (DMS models only)
10
DEST
I
Destination set
11
S SENS
I
Supply end sensor signal input
12
T SENS
I
T
ak
e up end sensor signal input
13
VIDEO RF
I
Video RF En
v
elop input
14
A
U
RF
I
Hifi A
udio En
v
elop input
15
AN 5V
–
P
ow
er supply
16
RESET
I
RESET signal input
17
3.58
O
NTSC color freq. judge signal
18
P
AL-N
O
“H”:
P
AL-N (Video b
loc
k control signal)
19
SAP BILL OUT
I
MAIN/SAP judge input
20
STEREO OUT
I
STEREO/MONO judge input
21
MAIN/SAP
O
MAIN/SAP select signal
22
VCC
–
P
ow
er supply
23
AF SWP
O
AF s
witching pulse output
24
RF SWP
O
RF s
witching pulse output
25
CAP
VS
O
Capstan error signal output
26
DR
UM
VS
O
D
rum motor error signal output
27
QVD
O
Quasi
VD pulse output
28
N.C
.
–
Not used
29
H.
AMPSW
O
“H”:
A-DUB mode (CTL Amp
. Gain.
Coutrol)
30
N.C
.
–
Not used
31
CTL (+)
I/O
CTL head signal Input/Output (REC mode)
32
CTL (–)
I/O
CTL head signal Input/Output (REC mode)
33
VSS (SER
V
O
)
–
Ground
34
CTL-AMP1
I
CTL Amp
. Coutrol (Gain set)
35
CTL-AMP2
I
CTL Amp
. Coutrol (Gain set)
36
CTL-AMP3
I
CTL Amp
. Coutrol (Gain set)
37
CTL-AMP OUT
O
CTL Amp
. Output (F
or Check)
38
DR
UM FG
I
D
rum FG Schmitt amp
. input
39
DR
UM PG
I
D
rum PG Schmitt amp
. input
40
CAP FG
I
Capstan FG Schmitt input
41
VCC (SER
V
O
)
–
P
o
w
er supply
42
VCC(OSD)
–
P
ow
er supply
43
CV IN
I
Composite
Video signal input
44
VREF
I
Ref
erence bias and clamp bias po
wer pin
45
CV OUT
O
Composite
Video signal output
46
N.C
.
–
Not used
47
AFC LPF
I
AFC LPF pin
48
AFC OSC
I
AFC oscillator pin
49
VSS (OSD)
–
Ground
50
DOSC-IN
I
OSD dot cloc
k oscillator (input)
Pin No.
Pin Name
I/O
Function
51
DOSC-OUT
O
OSD dot clock oscillator (output)
52
4FSC-IN
I
OSD 4fsc oscillator terminal (input)
53
4FSC-OUT
O
OSD 4fsc oscillator terminal (output)
54
CSYNC
I
Composite Sync signal input
55
REC PRF
I
Erasing protection tab. Cassette in detection
56
IIC
D
A
T
A
O
EEP R
OM, Hifi IC
,
T
uner/Serial comm
unication signal (IIC D
A
T
A
)
57
IIC
CLOCK
O
EEP R
OM, Hifi IC
,
T
uner/Ser
ial comm
unication signal (IIC CLOCK)
58
DRUM QR
O
Drum motor step driving
59
AF REC
O
“H” output when Hifi audio REC
60
AF REC P
O
“L” output when Hifi audio REC pause
61
TV/VIDEO
O
RF output control
62
SSB
CLOCK
(VIDEO)
O
Video
,
Video Amp
. Ser
ial communication signal (CLOCK)
63
SSB D
A
T
A
(VIDEO)
O
Video
,
Video Amp
. Ser
ial comm
unication signal (D
A
T
A)
64
BLUE BACK
O
OSD block control signal output
65
APC PWM
O
APC PWN signal
66
CAP
TRQ PWM
O
Capstan
TRQ PWN output
67
T
A
MUTE
O
“H”
output when
T
uner m
ute
68
TEST
I
Fixed to Ground
69
32kHz
(IN)
I
Timer Cloc
k ter
minal (32kHz)
70
32kHz
(OUT)
O
Timer Cloc
k ter
minal (32kHz)
71
VSS
–
Ground
72
10MHz (IN)
I
System clock terminal (10MHz)
73
10MHz (OUT)
O
System clock terminal (10MHz)
74
END LED
O
T
op/End LED ON/OFF control
75
REC P
O
“L” output when REC pause mode
76
IN
SEL
1
O
LINE-INPUT selection control signal-1
77
IN
SEL
2
O
LINE-INPUT selection control signal-2
78
OSD
SEL
O
OSD X’tal select signal (P
AL/NTSC_)
79
A
MUTE
O
“H”
A
udio m
ute signal outout
80
WRITE CONT
O
EEPROM write timing control
81
EP
.
LP
O
“H” : “LP/EP” mode
82
REMOCON
I
Remote control signal (SIRCS) input
83
CAM
O
CAM motor control
84
MODE 1
I
Mechanism section CAM encoder input (data1)
85
MODE 2
I
Mechanism section CAM encoder input (data2)
86
MODE 3
I
Mechanism section CAM encoder input (data3)
87
MODE 4
I
Mechanism section CAM encoder input (data4)
88
T
REEL
I
T
side reel FG input
89
S REEL
I
S
side reel FG input
90
FLD
CS
O
FIP driver chip select signal output
91
FULL
ERASE
O
Full er
ase head on/off control signal
92
P
CONT
O
Power Supply control signal
93
CAP
R
V
S
O
Capstan reverse control signal H when Reverse
94
CAP
QR
O
Capstan step driving
95
S CLOCK 0
O
Serial communication signal (Serial clock)
96
S IN 0
I
Serial communication signal (Data input)
97
S
OUT
0
O
Serial communication signal (Data output)
98
PLL
CLOCK
O
TUNER PLL clock
99
TU
ENABLE
O
TUNER PLL signal chip select
100
PLL
D
A
T
A
O
TUNER PLL data
6-1 E
SECTION 6
ERROR CODE
SLV-L56/L76HF/L86HF
This set displays an error code, and a mode code in case of error
on the display tube, if the operation stopped by error.
The following provides description concerned.
on the display tube, if the operation stopped by error.
The following provides description concerned.
A: Error code ............................................................... Table 6-1
B: Mode code in case of error .................................... Table 6-2
B: Mode code in case of error .................................... Table 6-2
These codes are displayed at lower 5-digit positions of display
tube.
In this case, “ : ” between digits is not displayed.
tube.
In this case, “ : ” between digits is not displayed.
Table 6-1.
Error Codes
Table 6-2.
Mode Codes in Case of Error
Display tube (lower 5 digits)
A
B
Code
Description
0
NO ERROR
1
CAM ENCODER ERROR, LOAD DIRECTION
2
CAM ENCODER ERROR, UNLOAD DIRECTION
3
T REEL ERROR
4
S REEL ERROR
5
CAPSTAN ERROR
6
DRUM ERROR
7
INITIALIZE ERROR
8
CASSETTE UNLOADING ERROR
9
RESERVED
Code
Description
0
EJECT (POWER ON)
1
EJECT (POWER OFF)
2
UNLOAD STOP
3
STOP (POWER ON)
4
POWER OFF (CASSETTE IN)
5
F. FWD
6
REW
7
LOW SPEED F. FWD
8
LOW SPEED REW
9
STANDBY
10
REC
11
REC (VISS)
12
REC PAUSE
13
PLAY
14
A. DUB
15
A. DUB PAUSE
16
CUE
17
REV
18
STILL (MECHA FWD)
19
FWD FRAM BY FRAM (FWD SLOW)
20
STILL (MECHA RVS)
21
RVS FRAM BY FRAM (RVS SLOW)
7-1
SECTION 7
ADJUSTMENTS
SLV-L56/L76HF/L86HF
1
2
3
4
Mode
SP
SP
EP
EP
Video signal
Color bar
Monoscope
Color bar
Monoscope
Audio signal
(HiFi/Normal)
400 Hz
Time
Seven minutes
Three minutes
Seven minutes
Three minutes
7-1. MECHANICAL ADJUSTMENTS
Refer to the SERVICE MANUAL of VHS MECHANICAL AD-
JUSTMENT VI.
JUSTMENT VI.
7-2. ELECTRICAL ADJUSTMENTS
2-1.
PRE-ADJUSTMENT PREPARATIONS
Necessary items and indications for total adjustment of electric
circuit of this machine will be described in this chapter.
circuit of this machine will be described in this chapter.
2-1-1.
Instruments to be Used
1) Color TV
2) Oscilloscope 1 or 2 phenomena, band more than 30 MHz, de-
2) Oscilloscope 1 or 2 phenomena, band more than 30 MHz, de-
lay mode, as provided.
3) NTSC pattern generator
4) PAL-N pattern generator
5) Digital voltmeter
6) Audio level meter
7) Audio noise meter
8) Audio generator
9) Attenuator
10) Alignment tape
4) PAL-N pattern generator
5) Digital voltmeter
6) Audio level meter
7) Audio noise meter
8) Audio generator
9) Attenuator
10) Alignment tape
Part Code: 8-192-605-36 KRV-51P (PAL)
Part Code: 8-192-605-32 KRV-51N2 (NTSC)
Part Code: 8-192-605-32 KRV-51N2 (NTSC)
2-1-2.
Connection
Unless otherwise specified, connect and adjust the measuring in-
struments as shown in the following diagram.
struments as shown in the following diagram.
During the adjustment, see the Parts Arrangement
Diagram for Adjustments on Page 7-6.
Diagram for Adjustments on Page 7-6.
Fig. 7-2-2
2-1-4.
Alignment Tapes
[Alignment Tape (KRV-51N2 / KRV-51P)]
2-1-3.
Set-up of Adjustment
In this adjustment, PAL-N or NTSC pattern generator is connected
with LINE input signal terminal. When check to tuner, connected
AERIAL terminal. Check that the amplitudes of video signal SYNC
signal, of picture portions, and of burst signals are flat at
approximately 0.3, 0.7 and 0.3 V, respectively, and that the level
ratio of the burst signal and “red” signal are 0.30: 0.66. Fig. 7-2-2.
shows video signals (color bars) used in adjusting the video section.
with LINE input signal terminal. When check to tuner, connected
AERIAL terminal. Check that the amplitudes of video signal SYNC
signal, of picture portions, and of burst signals are flat at
approximately 0.3, 0.7 and 0.3 V, respectively, and that the level
ratio of the burst signal and “red” signal are 0.30: 0.66. Fig. 7-2-2.
shows video signals (color bars) used in adjusting the video section.
PAL-N
NTSC
Video output
(75
Ω
)
Pattern generator
VCR
VIDEO LINE IN
Monitor TV
VIDEO LINE OUT
Fig. 7-2-1
2-1-5.
Specified I/O Level and Impedance
Input/output terminal
Video inputs
LINE IN
: phono jack
1 Vp-p, 75
Ω
, unbalanced, sync negative
Audio inputs
LINE IN
: phono jacks
47 kW, –7.5 dBs (0 dBs = 0.775 Vrms)
More than 10 kW, –4 dBs
More than 10 kW, –4 dBs
Video outputs
LINE OUT : phono jack
1 Vp-p, 75
1 Vp-p, 75
Ω
, unbalanced, sync negative
Audio outputs
LINE OUT : phono jacks
–7.5 dBs at load impedance 47 k
–7.5 dBs at load impedance 47 k
Ω
Output impedance : less than 10
Ω
7-2
2-1-6.
Adjusting Sequence
Make the electrical adjustment in the following sequence.
Checking power supply
Servo system adjustment
Audio system adjustment
2-3.
SERVO SYSTEM ADJUSTMENT
2-3-1.
RF Switching Position Adjustment
(MA-323 Board)
(MA-323 Board)
Purpose:
Adjust the interval between A ch and B ch of tape playback out-
put.
Improve the interchangeability with other tapes and sets.
When it is out of order, the interval appears on the screen, the
screen is disturbed.
Adjust the interval between A ch and B ch of tape playback out-
put.
Improve the interchangeability with other tapes and sets.
When it is out of order, the interval appears on the screen, the
screen is disturbed.
Mode
PB
Signal
Alignment tape SP mode color
bar
bar
Measurement Point
CH1: VIDEO LINE OUT
CH2: Pin 2 of CN501
(RF SWP)
CH2: Pin 2 of CN501
(RF SWP)
Measuring Instrument
Oscilloscope
Specified Value
6.5 ± 0.5 H (416 ± 32 µsec) PAL
6.5 ± 0.5 H (410 ± 32 µsec)
NTSC
NTSC
Adjusting Method:
1) Connect MA-323 board JS140 to the GND for about 1 secont
1) Connect MA-323 board JS140 to the GND for about 1 secont
to activate the RF switching position adjustment mode.
2) Check appear “A P” on FL display.
3) Using the channel + and – buttons, adjust to 6.5 ± 0.5 H.
4) Press the pause button.
3) Using the channel + and – buttons, adjust to 6.5 ± 0.5 H.
4) Press the pause button.
Fig. 7-2-3.
Mode
E-E
Measuring Instrument
Digital voltmeter
–10 V check
Measurement Point
Pin 9 of CN600
Specified Value
–10.3 ±0.8 V
+6 V check
Measurement Point
Pin 7, 8 of CN600
Specified Value
5.9 ± 0.2 V
+13 V check
Measurement Point
Pin 2, 3 of CN600
Specified Value
13.3 ± 0.5 V
+35 V check
Measurement Point
Pin 1 of CN600
Specified Value
38.0 ± 3.0 V
2-2.
POWER SUPPLY ADJUSTMENT
2-2-1.
Power Supply Check
HS-921SF1 BOARD,
SR-708 BOARD
HS-921SF1 BOARD,
SR-708 BOARD
Checking Method:
1) Confirm that each voltage meets its specified value.
1) Confirm that each voltage meets its specified value.
2-2-2.
+6 V Adjustment
HS-921SF1 BOARD,
SR-708 BOARD
HS-921SF1 BOARD,
SR-708 BOARD
Approx. 1 Vp-p
Approx. 5 Vp-p
V
enargement
CH2
CH1
CH2
CH1
Vertical sync. signal
6.5
±
0.5 H
(416
±
32
µ
sec) PAL
(410
±
32
µ
sec) NTSC
Mode
REC or PB
Measuring Instrument
Digital voltmeter
Measurement Point
Pin 7, 8 of CN201
Adjusting Element
RV201 (HS-921SF1 BOARD)
VR201 (SR-708 BOARD)
VR201 (SR-708 BOARD)
Specified Value
5.9 ± 0.2 V
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