Technics SUX 860 Service Manual

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ORDER NO. HADS70408908

Service Manual

Stereo Integrated Amplifier

Amplifier

SU-X86O

Color
(Kl . . . .BIack Type

Oolor Areas
(K) [EK] . . . . Continental Europe
(K) [EH] . . .. Holland
(K) [EB] . . . . Belgium
(K) [EF] . . .. France
(Kl [EK] . . . United Kingdom
(K) [EG] ... . F.R. Germany
(K) [EW] .. .. Switzerland
(K) [Ei] ..... Italy
(K) [XL] .... Australia
(K) [XA] , . . . Asia, Latin America,
Middle Near East,
Africa 8t Oceania
(KI [XBI -... Saudi Arabia
(DIN 45 500)
l AMPLIFIER SECTION Frequency response I GENERAL
PHONO RIAA standard curve
DIN POW 0mm 10 3 <33 (30 H145 kHz) Power consumption 300W
1 kHz THD:1% 2 X 60W (80) TUNER, CD, Aux, TAPE 1, TAPE 2 pow" supply
Total harmonic distortion I0 HZWGO kHZ (3 05) For conllnenhl Europe AC 50 Hz/60 Hz. 220V
rated power at 1 km 1% (80) Tone controls pm others
hall power at 1 kHz 0 007% (an) BASS 50 Hz. +10 dB~ ,10 dB AC 50 Hyeo HZ. 110w127w22ow240v
Residual hunt and noise 012 mv TREBLE 20 kHz +10 da~v1o dB Dimensions (WXHXD) 360 X 128 X 303 mm
Damping [actor 30 (an) Mutlng ,20 dB (14-3/16" X 51/32" < 1 1 40/32")
Input sensitivity and Impedance Super bass 70 Hz. +10 dB Weight egkg (15.2 lb.)
PHONO 3 mV/47k0 Output voltage
TUNER, co, Aux, TAPE 1. TAPE 2 TAPE 1, TAPE 2, REC OUT 200 mV
200 mV/zzm Channel balance, AUX 250 Hz~6,3oo Hz $1.0 :18
Maximum Input voltage (1 kHz. RMS) channel separation, AUX 1 RH: 60 dB
PHONO 120 mV Headphones antpul level and impedance
S/N (raled power 30) 520 "IV/330
mono 75 dB (IHF. A. 79 dB) Load impedance Note:
TUNER. CD. AUX, TAPE1.TAPE2 "Am or REMOTE en~160 Total harmonic distortion is measned by the
82 dB (IHF. A: 83 dB! sunnoumr ao~150 digital spectrum analyzer (HP 3045 system).
Specifications are subject to chnge without notice for further improvement.
Page Page
LOCATION OF CONTROLS ................. 2 BLOCK DIAGRAM ....................... 9 "~ 11
ACCESSORY . . . 2 SCHEMATIC DIAGRAM ......... . , . . . . 112 ~ 21
CONNECTION .......... 3 WIRING CONNECTION DIAGRAM . . ........ 22 N 24
PROTECTION CIRCUITRY ....... . . . . . 3 PRINTED CIRCUIT BOARDS ........ . . . . 25 ~ 29
BEFORE REPAIR AND ADJUSTMENT . . . . . . . 3 MEASUREMENTS AND ADJUSTMENT . . .30
DISASSEMBLY INSTRUCTIONS .............. . 4, 5 REPLACEMENT PARTS LIST ......... v 31 , 32
FUNCTION OF lC TERMINAL . . . ........... s EXPLODED VIEW .................. 33, 34
RESISTORS 8t CAPACITORS . ............... 7, B

Technics

Matsushita Electric Trading Co Ltd.
PO. Box 288, Central Olala Japan

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I LOCATION OF CONTROLS

Digital audlo tape monitor switch
(DAT MONITOR)

Super bass switch (SUPER BASS)

Audio/video suround-sound switch

Speaker selector (SPEAKERS) (SURROUND)

Power swnch (POWER) Audio muting switch (MUTING)

Volume control

(VOLUME)
Balance control

(BALANCE)

Volume-level indicator

VOLUM
Tone controls (BASS/TREBLE) ( E LEVEL)

Headphones jack (PHONES) Input selectors

y-Voltage selector (127Vw110V¢->220V->240V)

Input/Output terminal (For [XA] area )

Fan

. . .
Lfiemote speaker terminal

-Surround speaker terminal

Main speaker terminal

I ACCESSORY

' AC power supply cord ................................. 1

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Ref. No. How to remove the volume control
4 and switch P.C.B Volume knob Switch P.C.B.

Procedure
1 ->2 +3 +4

1. Remove the volume knob and the nut (o ).
2. Remove the 6 screws ( @~ 0) from the switch

P.C.B.
Fig. 1
Ref. No. How to remove the main P.C.B., power IC 9
5 and constant-voltage transistor 3
Procedure
1 +2 >5

1. Remove the 8 screws (0 ~ 0) from the rear
panel.

2. Remove the 3 screws (0 ~ 0 ) from the main
P.C.B.

3. Remove the 2 screws (0 , @i from the heat-
sink.

4. Unsolder the power [(2 and the constant-voltage
transistor.

5. Remove the 2 screws ( 0 , Q) from the
power IC.

6, Remove the screw ( ®) from the constant-
voltage transistor.

Fig. 3

7. When mounting the power [0 and the constant-

voltage transistor, apply silicone grease (SZOGYG6260) "ans'smr
over their constant areas.
Refé N°' How to remove the cooling fan motor 2. insert a screwdriver at the root of the cooling fan.
it out of the motor shaft.
Procedure
1 +6

1. Remove the 4 screws ( 0 ~ 0 ) and the connector.

J

Coolig fan

Fig. 2

3. Remove the motor cover.
4. Remove the motor from the fan casing.

5. When mounting the fan motor, align the fan casings /
. Projection
Cooling fan motor
projection with the hole of the fan motor. Fan casing
Motor cover Fan motor:
Fig. 3

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