Sony Videocorder AV-3400.
Portable Japanese reel video recorder format EIAJ. Model 1969,
manufactured in 1970. Dimensions
290 x 270 x 150 mm. Weight 8,5 kg. Power supply 12 v,
battery BP-20, or from a
Power Adaptor
AC-3400. Used
magnetic tape V-30, a width of ½-inch reel diameter
130 mm. A connector for the camera like
AVC-3400 and the
TV.
Videos can also be quickly viewed on the camera
viewfinder. Circuit recorder
collected only on the transistors (about 80 pieces), it
does not have a single chip. Electronics such recorders
rarely breaks, and usually only requires repairs
kinematics, namely the Drum motor, and certainly
requires changing lubricants and rubber belt. To repair
the drum motor has to be removed and completely
disassemble the unit heads. As
it turned out, from the old oxidized contacts collector,
dry foam insert under the brush springs and the springs
themselves caved. It
should be noted that the design of brushes are not
designed for 40 years of operation, and this defect
should be present in any such recorder. I had to repair
some of the video recorder, and in all cases we had to
sort out
URH
brushes to restore contact with the collector. In the
Internet you can find a lot of publications about this
model and produced her accessories. Instructions for use
can be found
HERE.
Video footage recorded on Sony AV-3400 with a video
camera Sony AVC-3400. Survey was conducted from a height
of 9 floors, pictured right to use zoom
Trial recording on Sony Videocorder
AV-3400 Camera AVC-3400
Specifications
Video recording system: Rotary 2-head scan system, full
field, composite video signal based on American TV
standards (supplied from the Video Camera AVC-3400)
Recording time: 30 minutes continuously with a V- 30H
tape
Tape speed: 7 ½ ips
Tape width: ½ inch
Video modulation system: Frequency modulation
Horizontal resolution: More than 300 lines
Video signal-to-noise ratio: Greater than 40 dB
Video input: 1.0V (p-p), 75 ohms, unbalanced
Video output: 1.0V (p-p), 75 ohms, unbalanced
RF output: 75 ohms, 80 dB (OdB = 1microV/m)
Audio input: (microphone input) 3.6k ohms, -65 dB, AGC
Audio output: (earphone output) high impedance
Audio frequency response: 100 Hz-10 kHz
Power requirements: DC, 12 V AC, 117V±10 (with use of
AC-3400)
Power consumption: 12 W (without AVC-3400)
Dimensions: 11 (w) x 6 3/4 (h) x 11 5/8 (d) in
Weight: 18 1b, 12 oz (with battery pack, tape and
reel)
Accessories supplied:
Ac Power Adaptor, AC-3400
Battery Pack, BP-20
Tape, V-30 H
Empty Reel, RH-5E
Earphone, CE-3
Monitor connecting cable, VMC-1M
Polishing Cloth
Splicing Tape
Cleaning Fluid
Head Cleaner
Shoulder Bag
In the video recorder
is provided using the battery type BP-20, with a voltage
of 12 v, and a capacity of 1 a/h. Homemade battery at 12
volts (analog BP-20) is made up of two sealed lead-acid
batteries for 6 volts, 1.3 a/h. Original
battery is also collected from two batteries 6 v.
Instructions to the original rechargeable
battery BP-20
At the moment I have
two of the tape, and placed below their photo taken
during the repair
In the photo below the recorder to the
board voltage regulator further modification
Two modifications were
made such recorders. In the early and later versions
were structural differences URH. On the left at the
bottom of the head early versions, right - later
In early versions URH Guide band for tape fastened to
the underside of the chassis with screws. Later, instead
of the guide band on the surface of the body began to
make the appropriate tab in the manufacturing process.
It also adds three additional springs to adhere the tape
from the top in position on the surface of the URH.
On the left bottom of the URH earlier versions, right -
late
On the left bottom
recorder early modification. It is seen therein that the
boards of a different color. Added to this is that the basis for
the Soviet copy - video recorder
"Electronica-501-video"
was taken Sony AV-3400 of the first modification
This board is the motor control circuit
Engine rotating head assembly was
defective. To get to it had to completely disassemble
the block heads. The design of it is those, that at
assembly all details become exact on the landing places,
and additional adjustments are not required almost.
Centering of an axis of the engine on a washer
tachosensor is required only.
On a photo at the left below tachosensors
it is established, on a photo on the right he is
removed. At repair of the block rotating heads to remove
it is impossible, as at assembly he is required for
centering an axis of the engine
Foam
insert a spring brushes grown old and lost their springy
properties. As a result of lost contact between the
brushes and the collector of the rotor. To recover the
engine needed replacement foam inserts and cleaning the
collector rotor.
Brush springs eventually sag and lose
their shape. In the photo at the bottom right of the
brush after the replacement foam inserts and repair
springs. It is necessary to mean, that graphite brushes
are pasted to springs by electric glue, and to restore
the form of springs it is necessary very cautiously that
they have not fallen off. At me such case was, and I
have pasted a brush usual electric glue with silver
conductive, and then for durability have strengthened
epoxy
At assembly after repair it is necessary
to tighten a nut fastening the rocker with the heads.
That it to make, it is required to fix strong a shaft of
the engine on the other hand. For this purpose it is
necessary to grind off a round surface of a shaft before
formation of a plane that it was possible to hold his
flat-nose pliers. A photo at the left below.
On the right picture below tachosensors
Magnetic tape such as
V-30 in the width 1/2 inches
The original power
supply AC-3400 with charger function. Except for the
button and the indicator of inclusion, on the forward
panel there is an indicator of a level of a charge of
the accumulator, a start button, and a socket for
connection of the accumulator. Dimensions 293 x 127 x 92
mm with no protruding parts, the weight of 3.8 kg.
The top cover is attached
a brief instruction on the use of the power supply as a
charger
Circuit diagram video recorder Sony
AV-3400
Block diagrams, mechanisms, and pictures
of electronics boards
Camera record mode
TV record mode servo
Playback mode servo
Rec/play mode audio
Video
system
Block diagram
Forward mode
Fast forward mode
Tape
path Video board Demodulator board Servo board Audio board
Video head assembly
Transistors and diodes
Wiring Sony AV-3420. This model was
produced for the European market, structurally identical
to the model Sony AV-3400, but the wiring diagrams
differ significantly
