Technics SUVX 800 Service Manual

Page 2

Output voltage/Impedance

TAPE 1, TAPE flDAT REC OUT 150 mV
{gamut balance (AUX 250 m~o.a km) :1: I an
Chapel par-lion (AUX 1 kHz) 50 all!
I GENERAL
Power consumption 870 W
Power supply

For Great Brltaln and Oceania: AC 50/60 Hz. 230/240 V

For FR. Germany. Italy and Continental Europe:
AC 50/60 HZ. 230 V

ForOthm: ACSO/SO Hz, 110 V/127V/220VI24OV

I CONTENTS

Page
BEFORE REPAIR AND ADJUSTMENT .................... 2
PROTECTION CIRCUITRY ............. . 2
LOCATION OF CONTROLS ........... . 3, 4
CONNECTIONS ......... . 4~6
ACCESSORIES .............. . 6
DISASSEMBLY INSTRUCTIONS ................. . 7~1 t
MEASUREMENTS AND ADJUSTMENTS ................ 1 1. 12

Dimensions (w x H x D) 430 x 158 x429 mm

' (16-15I16"X67I32"X16-29132)
Weight 17.0 kg (37.4 lb.)
Notes:

1 Specmcatlons are subiecl to change without notice
Weight and dimensrons are approximate,

2 Total harmonic distortion IS measured by the digital spectrum
analyzer.

SCHEMATIC DIAGRM .

PRINTED CIRCUIT BOARDS .
WIRING CONNECTIW DIAGRAM .
BLOCK DIAGRAM .............
REPLACEMENT PARTS LIST .
CABINET PARTS LOCATION .
PACKING ...............................

I BEFORE REPAIR AND ADJUSTMENT

(1) Turn all the power supply. Using a 100. 10 W resistor, shortcircuit both ends oi power supply capacitors (0601, 0602. 0607

and 0608) in order to discharge the voltage.
(2) Belore turning on the power switch ol the unit.
A. Connect the voltage controller to the primary side. J

B. Connect the AC ampere meter to the primary side or connect the DC voltage meter to me "18" circuit at the secondary

Side.

Ct Turn the VR of ICC (VR401. VR402. VR403 and VR404) to minimum (oounterclockwisel
D. Alter setting the output to zero or the voltage controller. turn on the power switch at the unit.

And increase the output ol voltage controller gradually.

Then. cheat carefully whether the current value or primry side become more than lotlowing value or whether the DC

voltage ol secondary side is increasing slowly.

E. It the value at current is increasing unusually or the DC voltage is not increasing. tower the output level of voltage

controller immedialety.

nThe current value of the primary side at no signal. (Confinh the power supply voltage of each area and provided voltage of

the unit.)
Power supply voltage AC 110 V AC 120 V AC 220 Vim V AC 240 V AC 240 V (6C, PX)
50 Hz 300~900 mA 270~810 mA 150~450 mA 140~43O mA 135~405 mA
Consumed current
60 Hz -- -_ _ _ _

I PROTECTION CIRCUITRY

The protection circuitry of the arnplllier may have operated it either ol
lhe tollowing conditions is noticed:

INo sound is heard when the power is turned on.

OSwnd stops during a performance.

The l'unaion cl this circuitry is to prevent circuitry damage it. lor
example. the positive and negative speaker connection wires are
shorted", or it speaker systems with an impedance less than the
indicated rated impedance at the amplifier are used.

If this occurs. lollow the procedure outlined below:

1. Turn all the power.

2. Determine the cause at the problem and correct it.
3. Turn on me power once again.

Note:
When the protection circuitry lunctions, the unit will not operate
unless the power is first turned on and then on again.