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DC Power Supply fitting
instructions
for Technics SL1200 & 1210MKII
Tools you will need – Soldering iron and solder, small slotted screwdriver, wire
cutters and wire strippers, Pliers. Phillips screwdriver.
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Kit Contents:
External power supply
12v AC wallwart OR Upgrade transformer
160mm SHORT lead (for internal wiring)
DC lead with barrel connector on one end (for connecting to power
supply)
Double terminal block
Cable tie
Tools you will need:
Soldering iron and solder
Small slotted screwdriver
Wire cutters
Wire strippers
Pliers
Phillips screwdriver
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Fitting Instructions
1. To avoid potentially lethal electric shock,
disconnect the deck from the mains by pulling
out the Technics deck plug from your wall
socket. Then remove the mains plug entirely to
avoid accidentally plugging it in. This is
essential for safety reasons.
Remove platter mat and platter by gently lifting up
using the two holes in the platter for grip.
2. Unscrew and remove the five cross-head screws
shown with arrows in photo. Then remove the top
cover of the unit to reveal the main motor control
board.
3. The large transformer towards the top left of
the deck is connected to both circuit boards via
black, brown, white, blue and two yellow wires.
Disconnect them from the points shown by
unraveling the wire.
The transformer can be reconnected by reversing
this operation if required in the future. This must
be carried out by a qualified electrician due to
the mains level voltages.
4. To safeguard the circuit, cover all bare ends of
wires with insulating tape and stow away from the
transformer.
Alternatively you can remove the transformer
entirely by unscrewing the three brass screws
around the perimeter. This is the best option for
sound quality reasons – as the transformer can
rattle in micro-vibration.
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5. On the transformer circuitboard disconnect the
two wires shown. The colours of these vary
between generations, so yours may not match the
image. Each cable should be marked “SW” (for
switch) on the board. These can be either
desoldered from the underside or cut close to the
the board and then 6mm stripped off the end.
6. If the DC lead has a grommet attached, simply
cut this off, then feed the long DC lead of the
Origin Live power supply from underneath the
turntable up through the hole located towards the
rear of the unit.
Tie a simple overhand knot approx 6 inches
(150mm) from the wire end to prevent the cable
being pulled back out of the deck through the hole.
Short lead
Long DC lead
(Positive wire)
Switch leads
7. Connect the supplied terminal block to the
disconnected switch leads.
Connect the positive wire of the DC lead (white
stripe) to the opposite side of the terminal block.
Connect the SHORT lead to the same side as the
DC lead. It does not matter which way round the
DC and SHORT lead are.
8. Solder the other end of the SHORT lead to the
wire link labeled J. This is marked positive in the
image.
Solder the DC lead negative (all black) wire to the
left hand side of diode D204.
If your board is different to the one shown please
contact us.
Completed image over page.
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Photograph showing the wires after soldering
10. Replace the platter and platter mat. It is better
not to replace the internal cover as this can induce
microvibrations and audibly degrade the sound.
Plug the Origin Live wall wart (or upgrade
transformer) into a mains socket and connect it to
the power supply (box with LED). Then connect
the DC lead from the turntable into the power
supply.
Power up the deck and ensure that you have
rotation of the platter. Press stop and take note of
the stopping motion. If it stops perfectly without
reversing or slowly spinning then you may skip
steps 11 and 12.
in place.
Close up of soldered joints.
9. Using the supplied tie, secure the wires at this
point. Also ensure that the DC leads going to the
terninal block are pushed down clear of the
revolving platter.
Power in
To turntable
11. As the turntable has a new supply the
electronic brake must be calibrated accordingly.
Disconnect the power from the turntable and
remove the platter and platter mat to get access to
the circuitboard. Locate the adjustment
potentiometer as shown in the image.
It will be labeled “BRAKE”.
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12. If the platter when stopped did not slow to a
More brake
Less brake
complete stop then turn the brake adjustment
clockwise to increase the brake power
Or, if the platter stopped and then proceeded to go
in reverse the brake is overcompensating – so turn
the dial anticlockwise.
Repeat steps 10-12 until it has a satisfactory
stopping motion.
13. Refit the top cover of the unit ensuring that
the new DC lead is carefully tucked in underneath
and does not foul the platter or moving parts.
Refit the platter and platter mat.
Your deck is now ready to use.
Do not use the power supply for anything other than the Technics deck.
The circuit will take around 30 hours to run in and sound it's best.
We wish you many hours of enjoying your increased level of listening pleasure.
Origin Live, Unit 5, 326b Spring Road, Sholing, Southampton, SO19 2PB
Tel:- 02380 578877 www.originlive.com originlive@originlive.com
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