Technics Universal Turntable Controller 2 Owners Manual

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UNIVERSAL HENRY ENGINEERING
503 4
TURNTABLE O Sierra'lgarfglxoé'lvgn

CONTROLLER (818) 355-3656

DESCRIPTION:

The UNIVERSAL TURNTABLE CONTROLLER is a remote control unit for use with professional direct-drive
turntables. The "UTC" converts the 'single button' start-stop control logic of the turntable to
independent Start and Srup outputs, so that separate START and STOP control switches can be used to
operate the turntable. The UTC also provides outputs to drive RUN and STOP mode indicator lamps.
plus a utility Logic output for interface with auxiliary equipment. Hhen the Universal Turntable
Controller is installed. the turntables own start-stop switch is still useable for cueing records.
and the UTC will always stay 'Jn sync with the turntable. The UTC is a solid state device employing
CMOS circuitry, and uses no relays or optical components. One UTC will control two turntables.

CAUTION:

Installation of the Universal Turntable Controller may require a slight modification of the turntable.
This modification. though minor, does require the turntable to be disassembled so that connecting wires
can be added. DO NOT attempt to install the UTC unless you are a qualified technician. If you do not
fully understand the installation procedure you are fl qualified to install the unit!

Disclaimer: Installation and use of the Universal Turntable Controller is solely at the users risk.
The UTC may be considered to be a modificarion' of the turntable, and m_al void any warranty thereof.
The user is advised that the- turntable manutacturer may refuse tn service or repair any turntable that
has or has had a UTC connected to it. It is suggested that, should the turntable require service after
installing the UTC. the 1ch wiring be removed and the turntable restored to its original condition
before iL is sent in for factory service.

INSTALLATION: (APPLIES TO TECHNICS'kSP-IU AND SPrlS 'I'URNTABLES) 4:» *SEE SPECIAL NOTE BELOWK
Connections to the UTC are made via the two multi-pin headers on the unit; one header is provided {or
each turntable and control circuitry. The first three pins of each header are connected to the turntable.
Pins A through 9 connecr to the users Start and Stop switches and Run and Stop indicator lamps. The

lOLh pin is for optional control of auxiliary equipment if desired. Terminate the interface Cables with
the mating connectors supplied. Use a flat-blade screwdriver to insert the wires into the 'forks on the
connector.

CONNECTION T0 TURNTABLE: Note: It is suggested that a schematic diagram of the turntable be obtained to
aid in the installation procedure. The UTC is connected to the rurnlable via a miniature three-circuit

plug and Jack. (See Figure 1.) Mount the jack on the turntable chassis wherever convenient. Some turn-
tables aro already equipped with a wo»circuit Jack; remove it. and install the one supplied in its place.
Important: Connect the STATUS wire (from Pin 2) to the 11:. and the CONTROL wire (from Pin 3) to the RING.
The I"? GROUND wire (from Pill 1) goes l - the turntable ground. The CONTROL wire (Pin 3) should be
Connected in parallel with the turntables internal start-stop SWZL(h, which must be a momentary contact
closure to ground. Some turntables already provide this Connection on a '{actoz'y' remote control jack.

The STATUS wire (Pin 2) must be Connected to a point in the Iurmahu Circuitry that is "HI"(+5 to 35 vdc)
when the turntable motor ls running, and "L0" (al or near ground) when the motor is Stopped. In most cases.
the easiest connection point is at the BRAKE SOLENOID, When the motor 15 stopped, the solenoid is energide
hence the junclion of the solenoid coil and its switching transistor is near ground. When the motor starts.
the transistor turns of! and this junction is held HI through the toil. This can be verified by monitoring
the Voltage at this )unctinn while starting and stopping the turntable motor. Note: There is usually a
surge-suprcssion diode wired across the Solenoid cm]. Connect the STATUS wire to the solenoid terminal that
has the anode of the diode connected to it.

CONNECTION TO CONTROL SWITCHES AM) LAMPS: The START and STOP switch outputs of the UTC (Pins 5 & 6)

may be connected to momentary switches as shown in Figure 1. Other logic Circuitry that switches to ground
may also be employed to conrrol the UTC. The RUN and STOP ]amp outputs (Pins 7 a 8) may be connected to
indicator lamps as shown. These ouLputs will sink up to 50m to ground at 24 vdr. LEDs may be used with
an appropriate current limiting resistor.

CONNECTION T0 AUXILIARY EQUIPMENT. The LOGIC output of the UTC (Pin 10) may optionally bc used to control
auxiliary equipment if desired. Per example. the via can switch console audio on and off when the turntable
is started and stopped. The Logic output is a maintained Hl (+12 vdc) when the turntable 15 running, and LO
when stopped. 11 oppositc logic is required, move R15 to its alternate postman, RISA (or R31 to NM),
Refer to the schematic diagram and parts layout. The Logic ouLpUE is unhuflered; only logic gate inpurs
should be driven.

OPERATING INSTRUCTM §

Push the START Switch to start the turntable: push the STOP switch to stop the turntable. The mode indicator
lamps Wlll always indicate either the Run or Slop condition. Pushing the turntables mm start-stop suitch
will also switch the mode, and tho UTC will switch the logic and indicator lamps accordingly.

*TECHNICS is a registered trademark of Panasonic Corporation.

454953170}! 'I'HCHNlCS SP-IU MKITLA, IN. TALL A 330!{ RESISTOI? IN 517E

WITH EATHS LEA").

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INSTALLATION INSTRUCTIONS PAGE 2

INSTALLATION: (APPLIES 1'0 'l'ECNNICS'SP-ZS AND Sir-1200 1K2 TURNTABLFS)

Connections to the "TC are made via the two multi-pin headers on the unit; one header is provided for
each turntable and control circuitry. The first three pins of each header are connected to the turntable.
Pins 6 through 9 connect to the users Start and Stop switches and Run and Stop lamps. The 10th pill

is for optional control of auxiliary equipment if desired. Terminate the interface cables with the mating
connectors supplied. Use a flat-blade screwdriver to insert wires into the 'forks' on the connector.

(DNNFL'TION To TURNTABLE: Note: It is suggested that a schematic diagram of the turntable be obtained to
aid in the installation procedure. In the case of 517-25 and SIrlZOO MK? turntables, it is not necessary
to remove the turntable assembly from the base. The turntable control circuitry pay be accessed by simply
removing the platter from the drive motor shaft and removing the cover that is beneath the platter.

The "TC is connected to the turntable via a miniature three-circuit jack and plug. (See Figure l.) The
jack should be mounted on the turntable chassis. The most convenient place for the jack is on the small
metal plate where the turntable AC cord enters the chassis. Carefully drill a r" hole in this plate to
mount the jack using the nut supplied.

\v'ire the miniature three~circuit plug to the UTC header by connecting the TI GROUND lead (from Pin 1) to the
sleeve. the STATUS lead (from Pin 2) to the tip. and the CONTROL lead (from Pin 3) to the ring.

Three wires will be connected to the jack; each wire will be connected to a point within the turntable.
The sleeve of the jack must be connected to the turntable GROUND. the tip will be connected to the
"BRAKE potentiomer (R 201). and the ring will be connected in parallel with the turntable's START~STOP SWITCH.

Near the front-left corner of the turntable. locate a bundle of wires leading from the Start-Stop and Speed
selector switches. Within the bundle. there is a yellow wire. The yellow wire is GROUND. Carefully

remove com of its insulation, and tap onto this wire with the lead tunnected to the mini-jack SLEEVE.

(It would be wise to verify that the yellow wire is indeed ground by checking continuity to a known power supply
ground point.) Also within the bundle is an orange wire. which is tonnected to the Start-Stop switch.

Verify this by checking continuity between the orange and yellow wires; there should be zero ohms when the
Start-Stop switch is pushed. Carefully remove some of the insulation. and tap the orange wire with the lead
connected to the RING of the aim-jack.

Now locate the "BRAKE" adjustment potentiometer. It is a small trimpot located on the right side of
the PC board. (PC designation R201.) The wire from the TIP of the mini-jack should be connected to
the OCH terminal of the pot. This will he the terminal closest to the turntable motor. Important:

set the trimpot to its FULL OCH position. Connection of the (FTC to the turntable is now complete. The
turntable may be reassembled.

CONNECTION TO CONTROL SWITCHES AND LAMPS: Important note: Due to the control logic of SILZS and 31.4200 HKZ
turntables, the Start and Stop switch wiring to the UTC (and Run and Stop lamp wiring) will be reversed

from that shown in Figure 1. Connect the START SVITCN to Fin 3. Co L't the STOP SWITCH to Pin 2
Connect the RUN LAMP to Pin _8_. Connect the STOP LAMP to Pin _7_ Cum: I the SUITCN COMMONS to Pin _
and the LAM? COMMONS to Pin 2.

CONNECTION TO AUXILIARY EQUIPMENT: See Installation instruction (or SP-IO and SP-IS turntables.
OPERATING INSTRUCTIONS:

Push the START switch to start the turntable. Push the STOP switch to stop the turntable. The mode indicator
lamps will always indicate either the RUN or STOP condition. Note: When the turntable is started, the

RUN lamp will illuminate instantly. However, when the turntable is stopged, the STOP lamp will light

after a slight delay, usually .5 setond, This, is normal, due to the control cirtuitry of the turntable.

Be advised that during this brief delay period, pushing the STOP button again will cause the turntable to
restart. This is because the UTC has not yet sensed the "Stop" mode of the turntable (STOP lamp not yet on).
If the delay period is objectionable. changing a resistor in the .TC will minimize the delay time.

Change R1 (or R17 for TTZ) from l {v to 33K to reduce the delay ti . Remember that this delay and the

minor ambiguity it creates happens only when going from RUN to STOP...never from STOP to RUN. The

turntable will always start when the Start switch is closed.

Pushing the turntables own Start»SLop switch will also switch the mode; the U'I'C will switch the logic
and indicator lamps atcordingiy.

TECHNICS is a regziztercd trademark of Panasonic Corporation.