Sony SEG-1 Service manual

Page 1
SPECIAL-EFFECTS
GENERATOR
SEG-1
2V990769-1
373-Printing
-NEG-
SONY CORPORATION OF AMERICA
4747 Van Dam Stnet, Long Island City, New York 11101
USA
Page 2
TABLE OF CONTENTS
General Description
Circuit Description
Transistor Voltage Chart.
Illustrations
...............................
.............................
..........................
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Points and Waveforms, Signal Processing Board.
Test Points and Waveforms, Sync Generator Board
Schematic Diagram, Signal Processing Board
Printed Circuit, Signal Processing Board
Schematic Diagram, Sync Generator Board
Printed Circuit, Sync Generator Board
Parts List
...............................
.................
................
..................
1
...........
.............
...............
1
3
4
4
5
6
7
8
9
10
Supplement
................................
13
Page 3
GENERAL DESCRIPTION
INTRODUCTION
SONY Model SEG-1 is a special-effects generator with facilities for switching, fading, superimposing,
and wiping two video signals. Inputs accept up to four SONY video cameras and provisions are included to monitor the output of each camera.
may be inverted, if desired, to yield a negative pic­ture. In addition, an internal sync generator supplies
2:l
interlace sync, or sync may be supplied from an
external source.
The SEG-1 may be used with any SONY video camera, monitor, and/or Videocorder. Refer to the Owner’s Instruction Manual for the complete operating pro­cedure.
One channel
External sync:
Power requirements:
Power consumption: Dimensions:
Weight:
Accepts vertical and hor-
izontal sync from Series Videocorders or vertical sync (-4V p-p) from an external
sync generator. See pin
connections below.
117V, 60Hz 3-wire parallel
ground plug
7
watts
5
1/4" H
x 15 1/2" W x 10” D
8
½
lb.
CV-
2:l EIA
TECHNICAL SPECIFICATIONS
Camera video inputs:
Number of camera inputs:
Monitor video outputs:
Number of monitor outputs: 4, SO-239 UHF receptacle Number of line outputs: 2, 1-Hirschmann 6 Pin
Internal sync:
1.0
-1.4V
7
5 n impedance. must be supplied with composite video. 4, Hirschmann 6 Pin receptacle
1.0 upon input), sync negative,
75 Cl
2:l SELECT switch is set to INT.
p-p, sync neg.
-
1.4V p-p, (dependent
impedance
receptacle 1 -SO -239UHF receptacle
interlace when SYNC
Input 1
CIRCUIT DESCRIPTION
,
VIDEO INPUT
Figure 1 shows the block diagram of the SEG-1.
Up to four cameras, either 4 CV-Series or 4 DXC-Series
#l
#4.
To de-
must al-
Each cam-
source-
B-
can be driven through Hirschmann connectors. velop the sync pulse in the SEG-1, Camera
ways be connected with composite video signals, while
either composite -- or non-composite -- video signal is acceptable through Camera #2, era output can be monitored through four (4) terminated SO-239 UHF receptacles.
Any combination of input selector switches is
accepted.
Video signals are balanced between A- and
channel by potentiometer
A-&+ ““r”-
VRl..
#3
and
If the output video
Fig. 1. Block Diagram of SEG-1
1
Page 4
levels of A- and B-channel cameras are very differ­ent, the camera lens f-stop should be readjusted.
VIDEO
one-stage amplifier, Q2, is employed in channel B.
Gain and level adjustments are accomplished by VR2 and VR3 respectively. positive picture can be obtained on channel B by means of SW-3.
DISSOLVE
INVERTER
To produce a negative picture, an inverting
Either a negative or a
by the two wipe one-shots are manipulated by resis­tor-transistor-logic gate IC-2 and switches SW-6 to arrange the vertical, horizontal and corner wipes.
CLAMPING
The video signal selected by mode switch SW-5 is clamped to ground during blanking time by Q5. The horizontal blanking pulse includes front and back porch, while the vertical blanking pulse has only a back porch.
(RTL)
inverters IC-1, RTL NOR
The two selected signals are independently attenuated by dissolve potentiometers VR4 and VR5, mixed by R24 and the FADE position, presented to the video ampli­fier.
WIPES
When mode switch
analog gates Q3 and Q4 switch rapidly between the two selected channels in accordance with the logic signals on their bases. The switched video signals are mixed by are arranged so that whenever one transistor is
turned on (turning off its video signal), the other
is turned off. This guarantees that one channel or the other feeds the monitor at all times.
WIPE LOGIC
The logic signals that control these transistors
are derived from the horizontal and vertical sync pulses. multivibrator
mined by the setting of the horizontal wipe pot VR6. At one extreme, a transition between channels is produced at the left side of the screen.
other pot extreme, a long
duced that delays the transition until the right
side of the screen.
slower (O-16 ms.
produces variable width pulses, triggered by the vertical pulse, for horizontal direction wipes. using in combination independently adjustable pots
VR6 (horizontal wipe) and VR7 (vertical wipe) and wipe selector switch, SW-6, it is possible to obtain
four corner wipes, as well as vertical and horizon­tal wipes.
Each horizontal pulse triggers a one-shot
(Q21/Q22)
Vertical wipe pot
The variable-duration pulses produced
R25
and, with
SW5-a
is set to WIPE,
R27
and R28. Logic signals
whose 0” time is deter-
(60~µs)
VR7
does a similar job at a
)
rate: Vertical one-shot
SW5-a
At the
pulse is pro-
in
Q23/Q24,
By
The horizontal blanking pulse is developed from
Camera #l and is a composite video signal. separator Q8 produces mixed sync, which is a pos­itive going 6 volt pulse. multivibrator (Q 9 about 2 µs in front of the sync pulse to form the front porch.
The sync pulses are delayed by Cl6 to form the horizontal back porch. mixed sync, horizontal back porch and the vertical blanking pulse are added with diodes Dl mixed blanking. transistor, Q5.
VIDEO AMPLIFIER
A two-stage feedback amplifier employed as the final stage. impedance to drive two from Camera video amplifier.
CAMERA DRIVE
Two modes of camera drive, external and internal, are available. one interlace sync generator is installed which is phase locked to either incoming vertical pulses
(through a Hirschmann male receptacle) or to
internal 60 Hz line frequency.
After the sync generator, both the horizontal
and the vertical pulses are shaped by and
Ql7
-Q20 respectively. These pulse-shaping amplifiers can drive a 19 (75 + 4) ohm load with a 4-volt negative-going pulse.
Due to the phase difference of horizontal
driving pulses, a combination of DXC-Series and
CVC-Series cameras is not recommended.
This signal is sent to clamping
#l
is inserted at the output of the
By means of a one-shot
/Q10),
a
60-µs
delayed pulse occurs
The horizontal front porch,
(Q6/Q7)
This gives low output
75-ohm
lines.
In the SEG-1, a two-to-
Mixed sync
Q13 -Q16
-D3
to
is
Sync
give
Page 5
TRANSISTOR VOLTAGE CHART
SIGNAL PROCESSING BOARD
TRANSISTOR
Q1 Q2 Q3 Q4
Q5 Q6 Q7 Q8 Q9 QlO Q11 Q12 Q13 Q14 Q15 Q16 Q17 Ql8 Q19 Q20 Q21 Q22 Q23 Q24 Q25
All voltages above measured with a 20,000 ohms-per-volt VOM.
B
2. 80
6. 90 0 0
0. 16
2.10
7.20
6. 20
0. 08
6.
70
0. 01
5. 50
0. 65
6. 60
6. 80
0. 32
0.10
0. 63
0. 08
6. 40
0. 08
7.10
0. 06
7. 0
8. 0
7. 60
0. 28
0. 05
0. 05
0. 75
7. 0
1.20
0. 45
5. 0
0. 73
5. 50
6. 10
0. 45
6. 80
0. 82
6. 40
6. 10
0. 28
6. 40
6. 80
2.40
4. 20
2. 05
3. 50
11. 0
C
L
E
2. 30
7. 60 0
0 0
1. 65
8. 0
6. 0
0
6. 0
0
4. 8
0
7.1
7.1
0 0 0 0
5. 90
0
7. 50
0
7. 60
7. 60
LOCATION *
c-4 E-3 F-2 F-2 H-2 J-2 J-2 c-5 c-5 E-5 F-4 G-4 C-6 C-6 D-6 E-6 C-8 C-8 D-7 E-7 G-6 G-5 G-8 G-8 L-4
SYNC GENERATOR BOARD
TRANSISTOR
Q1 Q2
Q3 Q4
(FET)
Q5
(UJT)
B
-0.66
0.
66
0
5.
30°
0.
3od
All voltages above measured with a VTVM.
SEG-1 CONTROL SETTINGS:
Channel A Level Control = Maximum (upper position) Channel B Level Control = Maximum (lower position)
LEVEL Control FADE -WIPE Selector SYNC SELECT Switch
*Refers to Schematic Diagram Coordinates
= Center = Fade = INT
C
0.
58
0.
55 58
0.
0..
58”
4.
80e
-1
FET
Gate
a
(
N-Type)
E
0 0
0. 55
1.
75c oaf
3.
LOCA
B-2 c-2 D-2 D-2 E-2
TION*
NOTES:
UJT
Drain
Emitter
Source
a
Base 2
Base 1
3
Page 6
Page 7
Page 8
Page 9
Page 10
Page 11
Page 12
PARTS
LIST
MECHANICAL PARTS
No.
ASSEMBLED PARTS
Part Number
AS-SEG-l-l
AS-SEG-1-2
Description
Screw, Pan Head (+)
#4-40 x
Clear Mylar Washer #4
Front Panel
Switch Mounting Bracket Screw, Pan Head (+)
#6-32x
Clear Mylar Washers Speed Nut, Tinnerman
#C8936-632
Speed Nut,
#C-7795-440-1
Pal
Screw,
#4-40 x
Speed Nut, Tinnerman
#C-8022-632-27 PalNut #4-40 Rubber Bottom Assembly, Top Cover Assembly Knobs for Pushbutton
Switch Knobs for Slide Switch Knobs for Rotating Pots Standoff
Description
Signal Processing Board,with com-
ponents and switchbracket
Sync Generator Board,
ponents.
l/4
3/8
Nut,
Reg. Type
Flat
3/4
Bumper #4076
Tinnerman
Head
(+)
#4
#4-40
SIGNAL PROCESSING BOARD
RESISTORS
All resistors are noted.
Symbol Rl
R2 R3 R4
R5 RlK-l/4-10C R6
R7 R8
R9 RlOK-l/4-10C Rl0 R6.8K-l/4-10C Rll R680-l/4-10C
R12 R13
R14 R15
R16 R6.8K-l/4-10C
l/4
watt,
10%
unless otherwise
Part No. R82-l/4-10C
" " " " " "
" " " " "
R220-l/4-10C
" " " " "
Description
820hms
lk
10k
6. 8 680
220
6.8 k
12
12
14
with com-
"
k
"
'ty.
4
8
4
4 4
4
4 1 1
4 3 8
Symbol
R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27
R28
R29
R30 R31 R32
R33 R34 R35
R36
R37
R38
R39
R40
R41
R42
R43
R44
R45
R46
R47
R48
R49
R50
R51
R52
R53
R54
R55
R56
R57
R58
R59
R60
R61
R62
R63
R64
R65
R66
R67
R68
R69
R70
R71 R72 R73
R74 R75 R76 R77 R78
Part No.
R1.5K-l/4-10C Rl0K-l/4-1OC
"
R560-l/4-10C R18K-l/4-10C R180-l/4-10C RlK-l/4-1OC R3.3K-l/4-10C
"
RlK-l/4-1OC R1.5K-l/4-10C
"
R6.8K-l/4-10C
R33K-l/4-10C R18K-l/4-10C R2.2K-l/4-10C
"
R4.7K-l/4-10C R3.3K-l/4-10C
R68-l/4-10C R3.3K-l/4-10C RlK-l/4-1OC R68-l/4-10C
"
R820-l/4-10C
"
R220K-l/4-10C R1.5K-l/4-10C RlOK-l/4-1OC R3.3K-l/4-10C R4.7K-l/4-10C R68K-l/4-10C R2.2K-l/4-10C R82-l/4-10C RlOK-l/4-1OC R3.3K-l/4-10C R560-l/4-10C R2.2K-l/4-10C R680-l/4-10C RlK-l/4-1OC R33K-l/4-10C RlOK-l/4-10C R56K-l/4-10C R4.7K-l/4-10C R2.2K-l/4-10C R560-l/4-10C R680-l/4-1OC RlOO-l/4-10C R47-l/4-10C R4.7K-l/4-10C
"
R3.3K-l/4-10C
R18K-l/4-10C
R680-l/4-10C R2.2K-l/4-10C R560-l/4-10C R47-l/4-10C
RlOK-l/4-1OC
R6.8K-l/4-10C
R220-l/4-10C
" "
Description
1. 5 k 10k
"
560 18 k 180 lk
3.3 k "
lk
1. 5 k "
6. 8 k
33 k 18 k
2. 2 k "
4.7 k
3.3 k
68
3. 3 k lk 68
"
820
"
220k
1.5 k
10k
3.3 k
4.7 k
68 k
2. 2 k 82
10k
3.3 k 560
2. 2 k 680 lk 33 k 10k 56k
4.7 k
2.2 k 560 680 100 47
4.7 k "
3.3 k
18 k
680
2. 2 k
560 47 10k
6.8 k 220
10
Page 13
Symbol
Part No.
Description
R79 R80 R81 R82 R83
R84 R85
R86 R87 R88 R89 R90
R91
R92
R93
R68K-l/4-10C Rl OK-1/4-l R82-l/4-10C R3.3K-1/4-l R220-l/4-10C
RlOK-l/4-1OC Rl8K-l/4-10C Rl2OK-l/4-IOC RlOK-l/4-1OC R3.
3K-l/4-10C
R82-l/4-10C
R150-l/4-10C
OC
"
"
"
OC
CAPACITORS
All capacitors are electrolytic, otherwise noted
Cl c2 C3 C4 C5 C6 C7 C8 C9
Cl0 Cl1 Cl2 Cl3 Cl4
Cl5 C16
Cl7
Cl8 Cl9
C20
C21
c22
c23 C24 c25
C26 C27
C28 C
2 9 C3O C3 1 C32
3
C3
ClOOM-15-20E
" " "
" " " " "
C5M-15-20E C390-3-20E
ClOOM-15-20E C5M-15-20E co.
00lM-600-10MY
ClOOM-15-20E ClOOP-600-1OC
CO.
OOlM-15-10E
ClOOM-15-20E C27OP-15-20C
CO.OlM-15-20C
ClOOM-15-20E CO.
05M-25-20C
ClOO-15-20E
"
CO.
0015M-600-10MY
Cl00M-15-20E CO.
22-600-1OMY
ClOOM-15-20E CO.
OlM-12-20E C3000M-15-20E Cl
00M
-15 -2 OE
"
TRANSISTORS Q1
Q2 Q3
Q4
TR-2N4123 TR-2N3906 TR-2N3646
"
20%,
unless
68 k 10 k 82
3. 3k 220
"
10 k 18 k 120 k 10 k
3.3 k 82
"
150
"
lOOµF,
15WV
" " " "
"
" " "
5µF, 15WV 390µF,
3WV l00µF, 15WV 5µF,
15WV
0.001 mylar
6OOWV,lO% lOOµF,15WV lOOpF,
ceramic
10%
0.
OOlµF,
ceramic
10% lOOµF,15WV 270pF,
ceramic
20%
0.
OlµF,
ceramic
20% lOOµF,l5WV
0.
05µF,
ceramic
20% lOOµF,
15wv
"
0.
0015µF,
lOOµF, 15WV
0.22µF, lOOµF, 15WV
0.
0lµF, 12WV 3000µF, 15WV lOOµF, 15WV
"
"
2N4123 2N3906 2N3646
"
600WV
mylar, lO%
Q5 Q6 Q7 Q8 Q9
Q10 Q11 Q12 Q13 Q14
Q15 Ql6 Q17
Q18 Q19 Q20 Q21 Q22
Q23 Q24 Q25
TR-2N4123
"
TR-2N3906
"
TR-2N4123 TR-2N3906 TR-2N4123
" "
TR-2N3906
"
TR-2N4123
"
" " " "
TR-2N3906 TR-2N4123 TR-2N3906 TR -2N3053
INTEGRATED CIRCUITS
IC-1 IC-MC714
IC-2 IC-MC789
POTENTIOMETERS
VRl VR2
VR3 VR4 VR5 VR6 VR7 VR8 VR9
P-2.
5K-2-BW
" "
SP-lK-l-BW
" " "
TP-lOK-l/4-BC
"
DIODES
Dl D2 D3 D4 D5 D6 D7 D-lN4002 D8 D9 DlO Dll
D-lN914
" " " " "
"
D-lN914
"
2D-lN5235
SWITCHES
SW-1 SW-2 SW-3
SW-4 SW-5
SW-6
SW-7
PSW-4-16PDT PSW-4-16PDT SLSW-l-DPDT
"
PSW-2-6PDT
PSW-4-16PDT
SLSW-l-DPDT-NE
2N4123
"
2N3906
2N4123 2N3906 2N4123
2N3906
2N4123
"
2N3906
2N4123 2N3906 2N3053
MC
714, Dual
Nor Gate
MC 789, Hex
Inverter
2.5k
"
1 k, Slide Pot.
" " "
lOk
"
lN914
" " " "
lN4002
"
lN914
"
lN5235
4 section pushbutton
"
DPDT (black) Slide
switch DPDT Slide switch 2 section pushbutton
3PDT/section 4 section pushbutton
4PDT/section DPDT with Red
Neon Lamp
Page 14
Symbol Part No. Description
CONNECTORS
CN
1,2, 3, 4
CN
6,7, 8, 9
CN 10
CN
11
CN 12
CN 13
CN-SO239
CN-MAB6
CN-MASE16
CN-4823’79-9
CN-582370-9
CN-582375-9
Coaxial Receptacles
Hirschmann 6 pin
Hirschmann 6 pin
AMP Edge Connector,
AMP Edge Connector,
AMP Edge Connector,
female Receptacles
male Receptacles
22 pin
5 pin
4 pin
MISCELLANEOUS
Tl
CD 1 CTS 1
PT-96-P-3
TS-3008
Power Transformer,
l0VCT, l AC Power Cord 8P Terminal Strips
#3008
A
SYNC GENERATOR BOARD
RESISTORS
Rl R2 R3 R4 R5 R6 R7
R8 R9 RlO
Rll R12
R12
R14
R15
R16
R17
R18
R19
R4.
7K-l/4-10C R18K-l/4-10C R4.
7K-l/4-10C RlK-l/4-1OC R33K-l/3-10C Rl 0K-1/4-l R3.3K-l/4-10C RlOK-l/4-1OC
R120K-l/4-10C
Rl. 5K-l/4-10C R680-l/4-10C R330-l/4-10C RlOK-l/4-1OC R18K-l/4-10C R150-l/4-10C R220-l/4-10C R20-5-10W
R18K-l/4-10C
OC
"
4.7 k 18kR
4.7k 1k 33 k 10k
3.3k 1Ok
"
120k
1.5k 680
R 330 R 1Ok 18k 150 R
220
R
20 R, 5 Watt,
wire wound
18k
C6 C7
C8 C9 C470P-400-10C
Cl0 co.
Cl1
Cl2
C25M-25-20E ClOOOP-400-10MY
ClOOM-15-20E
2-12-20C
CO.
05M-12-20C
CO.
lM-12-20C
DIODES
Dl D2
ZD-lN4729 ZD-lN5232 lN5232
TRANSISTORS
Q1 Q2
Q3 Q4 Q5
TR-lN4123
"
"
FET-2N5484 2N5484(FET)
UJT-2N4870
INTEGRATED CIRCUITS
IC-1 IC-MC790 IC-2 IC-3 IC-4
IC-5 IC-6
IC-7 IC-MC724
IC-8 IC-MC799
"
" " " "
25µF,25WV lOOOpF,400WV,
10%,
mylar
lOOµF,
15WV
470pF, 400WV
10%,
ceramic
0.2µF, 12WV, 20%, ceramic
0.
05µF,
12WV,
20%,
ceramic
O.lµF,12WV,
20%,
ceramic
lN4729
2N4123
"
"
2N4870
MC790(Dual J-K Flip
"
"
"
"
MC724 (Quad 2 Input
Nand/Nor Gate
MC799 (Dual Buffer)
Flop)
POTENTIOMETER
VR-1 TPlOK
CAPACITORS
CO.
Cl
c2
c3 c4
c5
lM-12-20C
02M-12-20C
co.
C5M-25-20E CO.
lM-12-20C
CO.
OlM-12-20C
l/4-10BC
1Ok
O.lµF,12WV,
20%,
ceramic
0. 02µF, 12WV 20%,
ceramic
5µF, 25WV
0.
lµF,
12WV
20%,
ceramic
0. 0lµF, 12WV 20%,
ceramic
12
Page 15
SUPPLEMENT
The following changes are incorporated into all SEG-1 Special-Effects Generators bearing Serial No. 1523 and higher. accommodate these changes. Refer to the revised schematic diagram and the SEG-1 Ser­vice Manual.
From Serial No. 2000 and higher, the Signal Processing Board has been redesigned as a two-sided printed board. The Sync Generator Board has undergone minor changes in. printed design as of the same serial number, and chassis modifications have been per­formed accordingly.
Minor modifications have been made to the circuit boards to
Details of the changes are given in the table below. to the schematic diagrams.
SIGNAL PROCESSING BOARD
Symbol
Cl9
c22
Q26
R30 R32 R49 R79 R8-7 R94 R95 VR8 VR9 VRlO VRll
Old Value New Value New Part No. 270
pF
.
05µF
33k
2.2k
68kR
68kR
120kR
10k lOk
150
pF
.
02µF
2N5485 82OR
56k 56k
1OOk
68k
lk 25k 25k
25k 25k
C15OP-400-20C CO. 02M-25-20C FET2N5485
R820-l/4-10C R56K-l/4-10C R56K-1/4-l Rl
OOK-1/4-l OC R68K-1/4-l RlK-l/4-1OC TP-25-l/4-BC TP-25-l/4-BC TP-25-l/4-BC TP-25-l/4-BC
Symbols and area coordinates refer
Remarks Location
OC
OC
Changed
" Added
Deleted Changed
" " "
Added Added Changed
"
Added
"
C-6 C-8 H-2
G-l H-2 D-5 G-6 G-8
H-2 H-2
D-5 H-2 G-6 G-8
SYNC GENERATOR BOARD *
Symbol
c4 Cl3
IC-6
Q6
R5 R7 R16 R20
Old Value New Value
02µF
O.lµF
33k
3.3k
15OR
.
01
.
MC790
2N4123
47k 10k
lk
10k
µF
New Part No. CO. 02M-15-20C
CO. OlM-15-20C
IC-MC790 TR2N4123
R47K-1/4-l Rl OK-1/4-l RlK-1/4-l Rl OK-1/4-l
OC OC
OC
OC
*Modification recommended to older units.
13
Remarks Location
Changed Added l/2
section
Added Added Changed
" "
Added
c-2 c-2
A-3
c-2
c-2 D-2 B-3
c-2
Page 16
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The following list contains stock numbers for cabinet parts and hardware. to the SEG-1 Service Manual for a complete list of electrical parts.
MECHANICAL PARTS
Refer
Part No.
DWG-V-218-1
-2
-3
-4
-7
-8
-9
-11
-12
-13
-14
-15
-18
-20
-21
-22
-23
-24
-25
-26
-27
-28
-29
-30
Screw, Pan Head (+) #4-40
Clear Mylar Washer Front Panel Switch Mounting Bracket Screw, Pan Head
(+) #6-32 x Clear Mylar Washer Speed Nut, Tinnerman
# C8936-632 Speed Nut, Tinnerman #C-7795-440-1
Pal Nut, Reg. Type
#
4-40
Screw, Flat Head
(+)
# 4-40 x Speed Nut, Tinnerman # C-8022-632 -27
Pal Nut #4-40 Rubber Bumper # 4076 Bottom Assembly Top Cover Assembly Knob for Pushbutton Switch Knob for Slide Switch
Knob for Rotating Pots
Standoff Screw, Flat Head (-) #4-40 x
Sync Board Screw
(+)
#4-40 x
Power Cord Strain
Relief Bushing Screw, Flat Head
(+) #
Screw, Flat Head
(+) # 6-32 x
Description
x
l/4
4-40 x
3/8
3/4
3/16
3/4
l/2
l/4
#4
#4
Q'ty
4
8
4
12
4
4
4
12
4 1 1
14
4
1
4
8
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