Mitsubishi Electric MC-8000 User manual

pa MITSU BISHI
UDIO SYSTEMS
SERVICE MANUAL
MUSIC CENTRE
MODEL MC-8000
ae MITSUBISHI ELECTRIC (U.K) LTD.

MC-8000 |
SPECIFICATIONS
FM Section
Tuningrange ............ 87.5MHz ~ 108MHz
Usable sensitivity ......... 0.9uV (75 ohms}
Total harmonic distortion ... 0.2%
Image response ratio ....... 45dB
Signal to noiseratio ....... 70dB
Stereo separation ......... 35dB
Ae@tial ins) irises a eal aed Impedance 300 ohms
balanced and 75 ohms
unbalanced
MW Section
Tuning range ............ 525kHz ~ 1,605kHz
Sensitivity ...........045 600uV/m (S/N: 26dB)
Image response ratio ....... 40dB
ACV lal ee a: acd ee x wt St na es Ferrite bar aerial
LW Section
Tuningrange ............ 150kHz ~ 350kHz
Sensitivity ...........0006 2mV/m (S/N: 26dB}
Image response ratio ....... 35dB
Aerial ses ches a iw ae ote etd thats Ferrite bar aerial
AMPLIFIER SECTION
Power output (1kHz, both
channels driven into into 8 ohms,
THD 0.5%) 25 watts + 25 watts
(4 ohms)
20 watts + 20 watts
(8 ohms)
Total harmonic distortion
(1kHz from AUX)
Input sensitivity/Impedance . .
Frequency response
sa ee ee
. 0.05% (10 watts per chan-
nel power output, 4 ohms)
MIC 1.5 mV/10k ohms
30Hz~20kHz (£1.5 dB)
Hum.and Noise .......... 60dB (DIN)
Tone controls
BASS 2 decade bes +8d8 (100Hz)
TREBLE............. +8dB (10kHz)
TURNTABLE SECTION
TYPOS pecan actee sk iteeeie ala Electronically controlled
fully automatic operation
Phono Motor Section
Drive mechanism ......... Belt drive
Motor sede oa ee eee. DC servo motor
Platten’ <0 08 at esis taeda 30cm (Aluminum die-cast)
Platter speed ............ 33-1/3, 45 r.p.m
Wow and flutter .......... 0.06% (W.R.M.S)
Signal to noiseratio ....... 55dB (1EC-B), 65dB
(DIN-B)
Tonearm Section
Ty pee 4 sos. a ee een ee Linear tracking, straight
tubular type, statically
balanced
Cartridge............... AT-71 (Audio technical)
StVlUS 226 echt, dee See es Diamond
Stylus pressure........... 2Qr
CASSETTE DECK SECTION
ThaCkS vw oo See Wise ote 4 track, 2 channel
Tape speed ..........00 4.75cm/sec.
Recording system ......... AC bias (85ktiz)
Erasing system ........... AC erasing (85kHz)
Playback equalization
Normal ..........005- 3,180usec./120usec.
Special and Metal ....... 3,180usec./70usec.
Frequency response .
Normal ........2.20005 30Hz~13,000Hz
Special and Metal ....... 30Hz~16,000Hz
Signal to noise ratio
DOLBY NR out........ 45dB (DIN)
DOLBY NRin......... 52dB (DIN)
Wow and flutter .......... 0.07% (W.R.M.S)
Channel separation ........ 25dB
Crosstalk .u5 tec ase cht eis 50dB
MOtor?.ia8.8 oka etoven es DC servo motor
GENERAL
Power (Mains) consumption . .
. 460 x 585 x 245 mm
Dimensions (W x H x D)
170 watts (IEC nominal)
(18-1/8 x 23-3/4 x 9-5/8”)
Weight .............0% 18.5 kg (40.8 Ibs)
Accessories .........2... T shaped FM aerial
AM lead aerial
Screwdriver (For Preset
FM adjustment)
Black mat 17,30 cm (For
transparent or coloured
records)
Wrench (For fitting turn-
table)
Cloth cover
“DOLBY” and the Double D symbol “ —(]”’ are trademarks
of Dolby Laboratories.
Noise reduction system manufactured under license from
Dolby laboratories.
Design and specifications are subject to change without
notice for reason of improvement.

INSTRUCTION OF TUNER SECTION
ATTENTION about AUX/TV<> TUNER switch
® Usually, in case of using the tuner of MC-8000, set the
AUX/TV+
+»
TUNER
switch
on
the
rear
side
to
TUNER
position.
Contraly,
by
setting
this
switch
to
AUX/TV
side,
it
is
Possible
to
select
source
connected
AUX/TV
IN
terminal
by
the
SELECTOR
on
the
front
panel.
| MC-8000
AUX/TU
LINE. AUX/TV
Qu
Si i a
LISTENING TO FM, MW, LW BROADCAST
(Manual Tuning)
Set the SELECTOR switch to the TUNER position. This
will cause the TUNER symbol to illuminate on the selector
display.
SELECTOR TUNER
mare =
PHONO
TUNER (ema,
(AUX)
Using the MANUAL button, select the FM, MW or LW
broadcast. .
MANUAL
0 0
Set it to the desired station.
f
When proper tuning is attained for that particular broad-
casting station, the centre of the dial pointer will grow in
red more intensively is the optimum tuning point. When
an FM stereo broadcast is being received, “FM STEREO”
indicator will be itluminated.
98 190 1
FM
1200 |.
280
Select the desired volume level with the VOLUME control.
The volume of the left-side and right-side speakers can be
adjusted by means of the BALANCE control located
inward of the VOLUME control.
FM PRESETTING
The MC-8000 is capable of presetting six FM stations.
Presetting is performed in the following manner.
1. Depress PRESET button 1, and while monitoring an
actual broadcast, either through speakers or through
headphones, turn the PRESET TUNING 1 screw using
the supplied screwdriver to obtain proper tuning. (When
the screw is turned, the pointer of the frequency meter
will indicate that particular frequency.)
2. Similar to 1, set PRESET button 2, by adjusting PRE-
SET TUNING screw.
3. Preset all the six FM stations following the above pro-
cedures.
ae
7s,
et
FM prt 1-7
32
2 5
2
ie
ay
4. When you wish to change presetting, this can be ac-
complished by following the ordinary presetting pro-
cedures.
LISTENING TO FM BROADCAST (Preset Tun-
ing)
Set the SELECTOR to the TUNER position.
Select the desired FM station. The frequency that has been
preset in the frequency meter will be displayed.
FREQ METER

MC-8000
DISASSEMBLY INSTRUCTIONS.....
1. Removal of Shaft
1) Remove the platter clamping nut with the supplied
wrench and dismount the platter from the body.
2) Remove the bottom cover of the set.
3) Disengage the belt from the fly-wheel.
4) Remove the screw and washer (Fig. 1) fixing the fly-
wheel.
Flywheel
Screw
Washer
Fig. 1
5)
If
the
fly-wheel
and
shaft
are
too
tightly
fit
together,
insert
a
plus
screwdriver
into
the
forward
end
of
the
shaft,
and
gently
hit
the
screwdriver.
The
fly-wheel
will
easily
come
off.
6) Remove the shaft’s E-ring (Fig. 2). The shaft will come
off toward your side.
Shaft bearing
shaft
Fig. 2
2. Removal of Turntable Unit
1) Take off the platter and the rear cover.
2)
Remove
the
disc
holder
cap
from
the
holder,
turning
it
counterclockwise.
(Refer
to
Fig.
3.)
Clockwise direction
ey t
Holder \ sé
Counterclockwise
direction =.
p B
Ca
Fig. 3
3) Unscrew the four fixing screws D for the metal C
located on top of the shaft. (Refer to Fig. 4.)
4) While slipping the wire, move the tonearm to a point
close to the center shaft.
5) Now, from the chassis side (rear panel), remove the five
fixing screws F . (Refer to Fig. 5.)
Turntable Section
Screw D
Front view /
Fig. 4
Screw F
©
Turntable unit
Rear view
Fig. 5
6) With this, the turntable unit can be removed from the
cabinet.
3. Replacement of Tonearm
1) Remove the two tonearm fixing screws.
2)
Using
a
soldering
iron,
disconnect
the
four
output
cords
(2
single-core
shield
cords
and
2
single
cords)
from
the
tonearm.
3) When the tonearm mounting nut ( G of Fig. 6) is
removed, the tonearm will come off from the tonearm
base.
Tonearm base
Tonearm

| MC-8000
DISASSEMBLY INSTRUCTIONS ..... Tuner & Amplifier Section
1. Removal of Rear Cover (Refer to Fig. 1.)
1) Remove the 14 screws (1) (black bind head tapping
screw, 3 x 16).
2) Remove the screw (2) (black bind head tapping screw,
3x 16). aa
3) Unscrew the two screws @) (black bind head, M3 x 8)
and shake proof washer on the threaded section to the
right.
4) Remove the screw (4) (black bind head tapping screw,
3x 10).
5) Remove the four screws &) (black bind head tapping
screw, 4 x 10).
6) When the two screws @) (black bind head tapping
screw, 3 x 12) are removed, the power switch c. board
and knob will come off. | i>®
7) Pull out the lead connectors from the transformer |. Bottom side
(Fig. 2) at 7 points. ||| rear cover
Amp P.C.B Deck P.C.B
-* ® Connector P.C.B Fig. 1
Connectors saisiasidacciauinal
| tt 8 j901—=0
Red leads Ss
=
Sa
a Orange
Black
leads
;
leads
te
Green
leads
§
Sf
Bottom
Bottom
plate plate
\ cannot be can be
removed
removed
NOTE: For reinstallation the
lead in pairs shoud be
push into the terminals
after braiding them
together for at least 7 times
Power transformer
Fig. 2
2. Drawing Out Lower-section Body
1) With the body laying on its side, remove the six screws
(yellow bind head, M4 x 16) and six washers shown in
Fig. 3. (For sets with serial numbers from No, 801
onward, the four screws (1) and washers shown in a a
Fig. 4 are to be removed.)
2) Unscrew the six screws (yellow bind head tapping
screw, 4 x 10) and washers located inside the cabinet.
(Refer to Fig. 5.)

MC-8000 |
3) Remove the two screws (1) (black bind head tapping
screw, 3 x 16) shown in Fig. 6.
®@ Disconnect the lead wire clamper of Section B.
®@ Disconnect jack J701.
®@ Dismount the disc operating button c. board shown
in Fig. 7, by pushing it in the direction of the arrow.
J701
x
From disc operating
{ ©)
[ J ge) From Deck P.C .B
FEIe TE, tl
A Leads clumper @
Terminal plate o
Fig. 6
Hook part
Disc operating P.C.B
Fig. 7
3. Removal of Tuner C. Board
1) Pull out the tuning knob.
2) Remove the two screws (yellow bind head, 3 x 12)
shown in Fig. 8.
NOTE: Remember to draw out the GND lug prior to
assembly.
Tuning shaft
= A GND lug terminal with black
lead is attached to the lower side
Fig. 8
3) Remove the two plastic rivets a shown in Fig. 9. This
is accomplished by pulling out Section A of the rivet
first in the manner shown in Fig. 10, and then pulling
out Section B.
NOTE: For reinstallation, insert Section B (Fig. 10) of
the plastic rivet first, and then insert Section A.
4) When the screw (2) (yellow bind head tapping screw, 3
x 12) shown in Fig. 9 is removed, the Tuner C, Board
will come off toward the back,
Tuner P.C.B
Fig. 9
Ye
®
<)>
Hold
it
with
a
pair
of
OT nippers and pull it out
» We
Fig. 10
4, Removal of Dial Ass’y from Tuner C. Board
The dial ass’y can be dismounted by removing the three
screws (3) (yellow bind head tapping screw, 3 x 12) shown
in Fig. 9,
NOTE: Mount the dial ass’y onto the circuit board, with
VR201 shown in Fig. 11 turned counterclockwise
as far as it will go and with the center position of
the pointer shown in Fig. 11 aligned with the
mark at the left end.
Dial pulley
VR201

1) After pulling out the VOLUME, BALANCE, BASS and
TREBLE knobs, take off the nuts used for fixing the
shafts.
5. Removal of Bottom Plate (Only for sets with serial
numbers from #801 onward).
The
bottom
plate
can
be
removed
by
removing
the
eight
screws
(yellow
bind
head,
M4
x
16)
and
washers
shown
in
Fig.
4.
(This
condition
will
permit
checking
of
circuit
board from the bottom side.)
| MIC-8000
DISASSEMBLY INSTRUCTION
Cassette Deck Section
1. Removal of Cassette Deck C. Board and Mechanism
Ass’y
The Cassette Deck C. Board and mechanism ass’y can be
removed in the condition with the mechanism mounted on
the c. board.
1) Following the Disassembly Instructions for the Tuner
and Amplifier Section, take off the rear cover and draw
out the lower-section body toward the front.
2) Take off the cassette cover.
3) After pulling out the REC LEVEL and MIXING knobs,
remove the nut fixing the variable resistors (VRs).
4) Using a nipper, or the like, cut off the wire clamper
fixing the wiring leading out from the panel section.
Also disconnect the plugs connected to the Cassette
Deck C. Board.
NOTE: When reinstalling, arrange the wiring neatly and
fix it to its former position using the wire
clamper.
5) Remove the four screws (yellow bind head, 3 x 12)
shown in Fig. 1 used for fixing the mechanism ass’y.
6) Remove the two screws (black bind head, tapped, 3 x 8)
shown in Fig. 2.
7) Disengage the belt on the tape counter.
8) The circuit board and mechanism ass’y can be dis-
mounted in this condition. The mechanism ass’y is
secured by bending the pawis which are inserted into
the circuit board. To take off the mechanism ass‘y,
unbend these pawls first, using a pair of pliers.
Remove four screws
Belt for counter
C. board
Remove two black screw
Fig. 2

MC-8000 |
ADJUSTMENT INSTRUCTIONS
Turntable Section
Height Adjustment for Tonearm Lifter
1) Using a 1.2 mm hexagon wrench, loosen the set screw
on the tonearm lifter.
2) Adjust it so that there will be about a 1 mm clearance
between the tonearm and tonearm lifter when the tone-
arm is at the rest position (STOP mode). Fix the tone-
arm lifter in place.
" Hexagonal
wrench (1.2mm)
@® Set screwvi2.6 x3)
ie
1.2mm
approx. 1mm
ADJUSTING POINTS OF TUNER SECTION
2-3 MW
1650kHz 52O0kHz
C308
T302
C321 C303
360kHz
Tuner C, board
(parts side)
HOW TO REPLACE A CARTRIDGE
1, The stylus can be removed by taking out as shown in the
illustration.
Head shell
Cartridge
= Hold this part
2. When inserting a new stylus, slide the protruding part
into the cartridge, and then move the stylus back in the
reverse direction the previous step as shown below.
Emitter
L301 | |[IVR208;
NUH
VR21I3 M20}
FREQ. Meter indication
to max. indication

ADJUSTMENT
INSTRUCTIONS
...
Tuner
Section
Before Starting Adjustment
Confirm
alignment
of
the
pointer’s
center
with
the
mark
at
the
left
end
(Point
A
shown
on
page
8)
when
the
dial
pointer
is
moved
to
the
minimum
frequency
position.
(At
this
time,
VR201
will
be
at
its
position
turned
fully
counterclockwise.)
1. LW Adjustment
1) Turn on the MANUAL LW switch.
2)
Adjust
VR208
for
25V
at
0214's
emitter
(E).
3)
Adjust
V209
for
IV
at
the
hot-side
terminal
of
VR209.
4)
With
the
tuning
knob
and
VR201
at
their
positions
turned
fully
clockwise
(maximum
frequency
position),
adjust
VR213
so
that
the
pointer
of
M201
(Frequency
indicator
meter)
will
be
aligned
with
the
scale
at
the
right
end.
5)
With
pointer
aligned
with
88M
of
the
holder,
adjust
LW
coil
L301
and
T301
for
maximum
sensitivity
at
140kHz.
6)
With
the
pointer
aligned
with
108M
of
the
holder,
adjust
C303
and
C321
for
maximum
sensitivity
at
360kHz.
7) Repeat (5) and (6).
2. MW Adjustment
1)
Turn
on
the
MANUAL
MW
switch,
2)
Adjust
VR208
and
VR209
as
described
as
above,
the
LW
adjustment
steps
(2)
through
(4).
With
the
tuning
knob
and
VR201
turned
fully
counter-
clockwise
(minimum
receiving
frequency),
adjust
T302
so
as
to
enable
reception
of
520kHz.
Then,
with
VR201
turned
fully
clockwise
(maximum
receiving
frequency),
adjust
C308
so
as
to
enable
reception
of
1,650kHz.
4)
Receive
600
kHz
and
adjust
the
position
of
L601's
(bar
antenna’s)
coil
for
maximum
sensitivity.
5)
Receive
1,400kHz
and
adjust
C325
for
maximum
sensitivity.
6) Repeat steps (6) and (7).
3.
3. FM Adjustment
1) Turn on MANUAL FM switch.
2)
Adjust
the
primary
side
of
T201
so
that
the
voltage
at
both
ends
of
R214
will
become
zero
in
the
no-signal
mode
in
the
neighborhood
of
98
MHz.
3)
Align
pointer
with
the
“108”
mark
position
found
to
the
right
(higher
frequency
side)
of
Point
A
shown
in
figure
on
page
8.
In
this
condition,
adjust
VR211
so
as
to
enable
reception
of
108
MHz,
4)
As
in
Step
3,
align
pointer
to
the
“88”
mark
Position
and
adjust
VR210
so
as
to
enable
reception
of
88
MHz.
5)
Receive
signals
of
98
MHz,
65
dBf,
1
kHz,
100%
modu-
lation
(MONO)
and
adjust
the
secondary
side
of
T201
for
minimum
distortion.
Also,
readjust
the
primary
side
of
T201
so
that
the
voltage
at
both
ends
of
R214
will
be
zero.
Repeat
adjustments
of
the
primary
and
sec-
ondary
sides
several
times.
6)
Change
modulation
of
Step
5
to
0
%.
After
inserting
a
resistor
of
about
22
k{Q2Q
at
Pin
3
of
1C202,
connect
a
frequency
counter
and
adjust
VR212
for
a
counter
reading
of
19
kHz
+
50Hz.
| MC-8000
ADJUSTMENT
INSTRUCTION
Eves
Mechanism
Section
of
Cassette
Deck
1. Tape speed
1)
Connect
a
frequency
counter
to
the
LINE
OUT
terminal.
2)
Play
Test
Tape
MTT-111
(3kHz),
and
adjust
the
variable
resistor
of
the
servo
circuit
with
a
minus
screw
driver
(inserting
it
through
the
motor-adjusting
hole}
so
that
the
reading
of
the
frequency
counter
will
be
within
3,000
Hz
*3°
Hz,
2. Head Azimuth Adjustment
1)
Connect
an
AC
voltmeter
to
the
output
terminal.
2)
While
playing
Test
Tape
MTT-215E
(8
kHz),
adjust
the
head
azimuth
adjustment
screw
for
maximum
output
for
the
L-ch
and
R-ch.
3)
After
adjustment,
apply
screw-lock
paint
to
the
screw.
3. Erase Head Adjustment
1)
Load
the
cassette
tape
(MC-10C)
provided
with
a
mirror
and
play
it.
2)
Adjust
the
adjustment
screw
so
that
the
clearances
between
the
tape
guide
attached
to
the
ERASE
head
and
the
tape
will
be
even
for
the
upper
and
lower
sides.
3)
On
completion
of
adjustment,
apply
screw-lock
paint
to
the
screw.
Be
sure
to
make
perfect
adjustments
as
“wrinkles”
and
“creases’’
may
develop
on
the
tape
surface
when
adjust-
ment
is
insufficient.
Tape guide
Erase head
Sr
Equalize clearance
es
Tape

MC-8000 |
ADJUSTMENT INSTRUCTION.....Circuitry Section of Cassette Deck
1)
Audio
Generator
.20Hz
to
20kHz
5)
Frequency
Counter
6)
Oscilloscope
2)
Attenuator
.....
0
to
90dB,
in
0.1
or
0.5dB
step
7)
Test
Tapes
3)
AC
Voltmeter
..
.F
res.;
20
to
100kHz
or
more,
MTT-111;3kHz,
.
.for
tape
speed
adjustment
R
in;
not
less
than
100kQ
MCT-400L:400Hz
.for
Normal,
Dolby
NR
level
and
Sens.;
-60dB(V)
or
better
Meter
indication
4)
Tester.........
20k2/V
MCT-600SA
...
.for
“Special”
bias
current,
blank
Adjustment of Playback Mode
Adjustment :
Measuring
Adjustment
Method
Ese | coe
VR601 | C616 put of within 580 mV + 25dB.
Meter
Level
meter
Play
Test
Tape
MCT-400L
and
adjust
for
a
level
meter
indication
of
within
Indication
0
dB
+
0.5dB.
Adjustment of Recording Mode
For
the
following
adjustments
insert
a
10022
resistor
‘between
the
head’s
minus
terminal
and
head
lead’s
minus
terminal
during
recording’,
and
use
it
as
the
measuring
points.
iseren Adjustment Method
Cen
Bias T481 Both ends of Put the set in the no-signal recording mode.
frequency 10022 resistor Adjust for a frequency counter reading of 85 kHz.
Bias VR481 | Both ends of With the set in the no-signai recording mode, adjust so that the output
current VR482 | 10022 resistor voltage will be 51 mV (510uA), i.e., standard voltage.
VR501
|
C516
Play
Test
Tape
MCT-400L
(400Hz,
Dolby
NR
level)
and
adjust
for
an
out-
put
Level
Connect AC Take out the inserted 100Q resistor and connect it in the normal man-
voltmeter to ner.
LINE OUT Put the set in the “specified recording’ mode by applying 400 Hz signals
to the LINE IN terminal. With the signal level at the LINE IN terminal
lowered by 30 dB, record the signals on Test Tape MCT-GO6SA.
Under the same conditions, record 6.3 kHz. Confirm so that the leve!
of 6.3 kHz will be within +0.5 dB, —O dB with reference to 400 Hz
when the tape is played. If this value cannot be obtained, adjust the
“standard voiltage’’ and reconfirm.
Recording; VR504 | Both ends of Put the set in the “specified recording” mode and stop the bias oscillator.
current VR604 | 1002 resistor With the Tape selector set to “SPECIAL”, set to the “standard voltage”,
of 5.8mV (58uA).
Connect
AC
Take
out
the
inserted
1002
resistor
and
connect
it
in
the
normal
man-
voltmeter to ner.
LINE
OUT
After
putting
the
set
in
the
“specified
recording”
mode
by
applying
terminal
400
Hz
signals
to
the
LINE
IN
terminal,
lower
the
signal
level
at
the
LINE
IN
terminal
by
30
dB
and
record
the
signals
on
Test
Tape
MCT
606SA.
When
the
tape
is
played
back,
the
level
should
be
the
same
as
that
during
monitor
(SOURCE).
!f
the
levels
do
not
agree,
adjust
the
“standard
voltage’
and
reconfirm.
Peaking
L503
Both
ends
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rated
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knob
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rated
output
level
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dB)
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obtained
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= / Tea sel [aise 2 | b28h 6 a va Tl Se = oHe 2 30 C107 0-6 R122 D-6 R185 B-2
: ae a i ie é b.2e8 ees oF, res « leoit C108 B-8 R123 cs R186 C-2
*®O of _ aise eg]! 1ci03 ,! H ‘ s ot tg ‘ pos” log C109 0-8 R124 C6 R187 8-7
g o-0 He eel € ia ee is & ” oe LiL c110 8-3 R125 ASB R188 0-7
cCONN-3° Leu” \8el aie?! o—_*—_+ oq) ® Jai cit B-4 R126 AS R189 D-3
83O ron RISt RISO pIOs QI388. Stoll . * C112 D-4 R127 AS
nd
thm!
1
We
Hie
ccecey
|
nas
f
pH
;
C113
D-2
R128
A-5
aa 90 « 124 c114 C2 R129 C6 Q103 B-7
: C115 B-2 R130 A-4 104 8.7
C116 B-2 R131 A4 105 B-G
g C117 A-2 R132 A-4 Q106 8-7
c118 A3 R133 A-4 Q107 B-7
5 C119 B-3 R134 D-5 a108 B-7
c €120 C2 R135 D-5
C121 C2
a2 AG
D101 E-8 R139 D5 ani3 AS
D102 E-8 R140 D-6 ai14 AS
D103 &.7 D141 C5 ais A3
D104 D6 R142 D-5 ais A3
D105 C7 R143 D-6 Q117 A4
D106 C4 aig D-5
D107 D-2 R145 C6
D108 B-2 R146 D-2
R147 8-4 ai21 | O€
D110 B-3 R148 B-4 Q122 D5
DiI D-3 R149 B-3 Q123 D-7
D112 D-3 R150 C4 Q124 D-3
D113 D-3 R151 C3 125 D-2
0114 C3 R152 C-4 Q126 C4
D118 D-3 R153 C3 Q127 C4
D116 D-3 R154 B-4 Qizg | BS
0117 C5 R155 C4 aiz9 | «B-5
REPEAT aPEED,, 0118 C5 R186 B-4 aQi30 | 8-4
e3 D119 E-2 RI57 8-4 Q131 | BS
| oacwa. 2 alien P\ad Riss | C5 a132 |B
t a ‘S STOP LIF T/CUE START - Soe ; ra 1C101 B-6 R189 cs e188 | B6
7. 1 S107 _ S106 BIOS _ o2_ _ bk 1€102 C7 R160 B- 134 | D3
Lo 8.9.6 66 8 f 7 r 7 le 7 $108 7 {C103 C3 R161 8-5 ai3s5 | 4
De re | i | i I I {C104 E-2 R161 B-5 Q136 |; 0-5
1 l | I 1 | R162 C5 Q137 | C4
: t ! I I I t i 1 R101 A6 R163 C5 Q138 C5
I | I ! 7 ! ! | R102 AS R164 AS Q139 C-4
I I 1 I i | i) | R103 A6 | R165 8-6 a140 D-5
J I I { I I i | A104 B-7 | | R166 D-7 a14ai E5
De eee cl | Enero | [Sige | [ is eee R105 B-7 ; a142 | D2
R106 A6 ! R168 D-3 Q143 0-2
eooee eooeee R107 AS ; R169 D-3 araa A-2
R108 AS R170 C4 Qi45 | AT
R109 B-6 Rt71 D-4 !
R110 B-7 R172 D4 $104. | F7
Ri11 A? R173 D-4 S105 | FB
Rit2 AT R174 0-4 $106 | F-6
R113 A-7 AI75 D-4 sio7 | FS
R114 B-8 R176 C5 $108 F-5
R115 AB RV77 D-5
— 23 - =A

MCG-8uUU WiIL-ouUUU
SCHEMATIC DIAGRAM.....Ampiifier Section
SPEAKERS-8
aren {794
Tt Pie
: se
« Ba
=
OS
¢
3
w
NOTE
:
Select
fuse
holders
position
aceording
to
:
mains
voltage
as
follows,
s|
4
AC240V
:
F11
‘2
AC220V
:
F12
to DECK PC.B
z “orn
, 1O TUNER to DECK
LAMP LAMP
PCB PCB
FE toed
——
Turntable Section
(EQ. P.C.B)
AUX/TV LINE OUT
{Locate at rear side)
O
yaa
Bae,
380
230358E,,
01
i Me APL aH
aa
0908 eset
ISRS4-100 BO ove
to @® port of
DECK P-C.B
to ©~@ of OECK P.C.B
For ripple capacitor (+ end}
Input {hot end}
TO TUNER
AFT~42
a
sip Sede hae ee oe eed
Interna
| block diagram of HAIZ002
1
to
AFT-42
For
rippte
capecitor
{~
end)
=
}
to
®
port
of
=
Power
supply
(—Vec}
DECK
P.C.8.
Pin
conection
of
semi-conductors
r
Input
(cold
endt
NOTE:
4,
Voltages
of
the
respective
sections
are
those
measured
CT
1
1.
Units
of
C
and
R
with
#
DC20KR
tester,
1
=
C:
Ne-symbot:
uF
R:
no-symbal;
2
5.
and
MI
marked
components
have
special
cha
!
Power
supmty
(—Veed
parymbol;
pF
k
symbol;
kit
ractacistics
10
keen
safety
performance
of
this
unit.
H
@
|
ch
Ouae
2.
Unspecified
resistors
are
carbon
4W
and
capecitors
when
replacing
any
of
these
parts,
be
sure
to
uss onty
1
: I
;
sappy
(Vea)
without
voltage
indication
have
a
SOV
withetand
specified
on
the
parte
tit.
iW
|
eadcieaaaes
voltage.
2,
Regitters indicated
as
the
FA
show
fame
prooved
This
schematic
is
the
basic
disgram
and
the
values
are
i
ones.
subject
to
change
without
notice.
1
16908
'
t
ep Ee
—25— — 26 —

Wil- GUUU iViG-6UUU
PRINTED CIRCUIT BOARD ..... Amplifier Section
LINE OUT AUX/TY
‘G--- G,
—@ ro @ :
Jack P. C. Board ea | eal
—
Symbol] pddress Symbol | address
e721 E-4 | K901 cA
C722 E-4
C723 B4 L721 8-2
C724 A-3 1821 B-2
C725 A-4
C726 A-3 ago1 C4
C727 B-4
C728 B-4 R721 £-4
oe AS R722 A-4
730
-3
R723
A-4
.
C731 F-3 R724 8-3 Equalizer P, C. Board
C732 F.2 R726 B-3
6733 E-2 R727 B-3
C734 B-3 R728 E-3
R729 £3
c901 C-2 R730 €-3
C302 C-3 R731 E-2
C903 C-3 R732 F-2
c904 C3 R733 €-2
C905 B4 R734 c-3
cg06 C4 R735 Be1
c907 D-2 R736 E41
c908 D-2
c90g D-2 R821 €-4
C910 D-3 R822 A-2
cat D-4 R823 A-2
c912 D-4 R824 8-2
c913 D-4 R825 B-2
co14 D-2 R826 B-2
C915 B-1 R827 B-2
C916 Be R828 F.3
C917 B-1 R829 E-3
c918 D-3 R830 E-3
c919 A-3 R831 E-3
R832 F-3
Diz) pes Bes3 E-2 Switch P, C. Board
D821 A-2 R834 C3
R835 B-2
D901 C-2 R836 E41
0902 C-2
0903 C3 R901 D-3
0904 C-3 R902 D-3
D905 D-2 R903 0-4
o906 D-3 R905 At
D907 D-3 R906 Al
D908 0-2 R907 B+
SPEAKER A pees — R908 B-1
: 9. $721 &1
ee FS Fa F721 D-1
F821 D-1 VR721{ F-4
F901 C-2 VR722| F-4
F902 C-2 VR723 | -F-3
VR724| F-2
10721 A-3
1C821 A-3 vrs21| F-4
1c901 8-1 VR823| F-3
VR824 | F-2
J702 C4
J703 C4
J704 0-4
3721 F-2
Cacia
~27- — 28 —

PLATTER Side
MC-8000
MC-8000
from
TONEARM ASS'Y
...
Turntable
Section
WIRING...
of
ef
3
8)
2
2
a
a
=
q
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2
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&
ws
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gemw
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RED
on
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TT MOTOR mio3
HORIZONTAL Mio2
— 30 —
VEL
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|
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ore
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DOWN
$103
CAM
VERTICAL
VEL (REO (ORN
M101
Q145,
B
GRY mtn
MUTING SW.
P.C.B
aK
veL
cp
WHT a2
—29 —
i 19
7
§-NNOD
[OOD000000
innate
REST
Sio1
CONTROL P.C.8
ew