Technics SH 8016 Service Manual

Page 2

i CONTENTS

Page - page
SAFETY PRECAUTION ........ 2 CIRCUIT BOARD AND WlRING
LOCATION OF CONTROLS . 2 CONNECTION DIAGRAM .
DISASSEMBLY INSTRUCTlONS . 3 SCHEMATIC DIAGRAM ..........
RESISTORS and CAPACITORS . .4 REPLACEMENT PARTS LIST .

EXPLODED VIEW .................

I SAFETY PRECAUTIONS (This safety precaution" is applied only in U.S.A.l

. Before servicing, unplug the power cord to prevent an electric shock.

. Whe'n replacing parts, use only manufacturers recommended components for safety

. Check the condition of the power cord. Replace if wear or damage is evident,

. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.

. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to
prevent the customer from being exposed to a shock hazard,

01$de

INSULATION RESISTANCE TEST

1. Unplug the power cord and short the two prongs of the plug with a jumper wire.

2, Turn on the power switch.

3. Measure the resistance value with ohmmeter between thejumpered AC plug and each exposed metal cabinet part, such as
screwheads antenna, control shafts, handle brackets, etc. Equipment with antenna terminals should read between 3M9
and 5.2MQ to all exposed parts, (Fig. A) Equipment without antenna terminals should read approximately infinity to
all exposed parts, (Fig. 8)

Note: Some exposed parts may be isolated from the chassis by design. These will read infinity.

Antenna

terminal \13 I
I
Exposed 9 Exposed /
metal metal
part part
Ohmrneler Ohmmeter
(Fig.A) (Fig.8)

Resistance=3MQ-5.2M§2 ResistancezApprox oo

4, If the measurement is outside the specified limits, there Is a possibility of a shock hazard. The equipment should be
repaired and rechecked before it is returned to the customer,

I LOCATION OF CONTROLS

16kHz

6.3kHz
Left channel 2.5kHz
band level
controls
(112dB)

Right channel
band level controls
(i12dB)

-- lnput selector
( - tape, 1 source)

Power/equalization switch
( A on, I off)

Page 6

1 . 2 I 3 . 4 . 5 . 6 . 7 I 3 , 9 .

I SCHEMATIC DIAGRAM

. . I .. NoteZ O1 02 01,2 DI1~14
(INS schterzzticddiaglram may be modified at any 4* Important safety Home: 2501815 ZSA1015 MAZIIO 152076A
""9 WI e eve opment 0' new technology) Components identified byAmark have special characteristics IIVSIVVT'I'héI-EI glngiT IgWI-I'lgfi EWCUT 1
important for safety. When replacing any of these components, I All III 5
Note 1 . use onlv manufacturer's specified parts. m n 1: 10.01 L -'
O 8101 : Input selector in source" DOSIUOH- * Indicated voltage values are standard values for the unit measured El = a M" '5
l - ; tape, I. 7 source} . . by the DC electronic circuit tester (high-impedance) with the = a {gig Ex} 0 I
0 S301 : Power switch in "or!" DOSINOH- chassis taken as standard Therefore, there may exist some errors 5T 3 33 I111 o
l ;on, 1 ; off) icnrgi'fitvtilst'aegre values, depending on internal impedance of the DC g1 § ' é J_ I11; I <3 A AC 120V
' =_.= {EH zgxi L .J 2 (60Hz)
E g . 1 :2l lam [)5
g ..=v. l l MA167
E JACK CIRCUIT 2:; Ilka ii 33 a c, .3}
Source signal a 2 av, .7 5" zsvmn 5 g _
"I > > ov mar/v D7 Da 5 m 2: MUTING SWITCH
[- L c [g] : 35- ~ a w; CIRCUIT
, x F T 3 N 3 xi i :5 -"~.=E
. V. . V ., a .. I. m -. 530
LINE IN 1 [-gfi-OfiI Slfll > " ' 3 c. .1 F 1
ms I {Source5 -- -- -- uni «- :orr
1 L 5 _l o -'
R ° ' We?
1 vvr w
"ng "m Muting
ms nu Illll POWER SUPPLY CIRCUIT D221
180 25197 1K _. '3 , - MA165
L vvw , no vvv \ - v .z , . 3 .
Jl
LINE our § es, E 1, f3}
5 5 5 f
g ._. x
R VOLUME CIRCUIT
, J2
2% ll J: I:
If}; . i 4;. w' % I31 ICZOI, 202 D201 ~ 214
L g, Q M5229P LNZGORCPP
g av 21;: e 3 1E B
_ WV , i r .
REC OUT Recording E m l 554 E T mi» / Output signal
signal " " 331 ""I31 4 ' ' ' ' ' ' . (Corrected signal)
L- R -' gig: fl {4} 3
w rig-$1: ,
TAPE .1. . 2 Q g: 22%?
u'r 1? mm m-
L g .- 5 5.. 2.7x
3;: 3;: 5;: .r
PLAYBACK 4- V , ' a
0101,102 Esp-F- g5 E
R zsc2373 5'9"" ' . . s
MUTING ~ 3 I
J.- §
"$101 "3102 3;: 3;; -i_ln.4V E 13,:V0AV0AV1V2V 63" § §
AN6555 LC4066%};F -!§ x: um um) Itzuz IIIIIIIIII 5 .3 .
BUFFER AMP. 50 ON] E3 g IIIII 2.5m 63m 15m mum lmz 52:5
§ :E E :: a l "-
s " 3 E g2
all. : -- § m
L%a Lesa L-s Lag Leg ea $§ Lsé ng L=§ L.=§ -:.5 i=5
0 -D- Positive and Negative voltage line.
In
San: isnm mum Im 2.5kHz 6.3tz 15m 53m New «Inn: mi: 2 5kHz 5 am: mm
LEFT RIGHT