Technics SU-V90D User manual

Service
Man
Digital Integrated Amplifier
OS 250464
SV MNL
'
91004988 4
SM—-SUVIOD
/
“4
ST
“a
a3
SPECIFICATIONS coin 45 500)
@ MAIN AMP. SECTION
20 Hz~20 kHz continuous power output
both channels driven 2 X 100W (8Q)
1 kHz continuous power output
both channels driven 2X 150W (49)
2 X 115W (80)
Total harmonic distortion
rated power at 20 Hz~20 kHz 0.002% (89)
rated power at 1 kHz 0.0007% (89)
half power at 20 Hz~20 kHz 0.002% (89)
half power at 1 kHz 0.0007% (89)
Intermodutation distortion
rated power at 250 Hz: 8 kHz=4:1, 80 0.005%
rated power at 50 Hz: 7 kHz=4:1, SMPTE, 8Q
0.005%
Power bandwidth
both channels driven, —3 dB
5 Hz~60 KHz (8, 0.025%)
Residual hum and noise 0.8 mV
Damping factor 30 (49), 60 (82)
Headphones output level and impedance
700 mV/3300
Load impedance
MAIN or REMOTE 4N~16
MAIN and REMOTE 8N~160
@ PRE AMP. SECTION
Input sensitivity and impedance
PHONO MM 2.5 mV/47kQ
MC 170 xV/2200
TUNER, CD, AUX, TAPE 1, TAPE 2/DAT
150 mV/18kQ
POWER AMP DIRECT 1V/47kQ
Technics
PHONO maximum input voltage (1 kHz, RMS)
MM 160 mV
MC 12 mV
S/N
rated power (4Q)
PHONO MM 79 dB (88 dB, IHF, A)
MC 70 dB (72 dB, 250 uV, IHF. A)
TUNER, CD, AUX, TAPE 1, TAPE 2/DAT
100 dB (JHF, A: 106 dB)
POWER AMP DIRECT
106 dB (IHF, A: 115 dB)
—26 dB power (40)
PHONO MM 79 dB
MC 68 dB
TUNER, CD, AUX, TAPE 1, TAPE 2/DAT
86 dB
50 mW power (40)
PHONO MM 76 dB
MC 69 dB
TUNER, CD, AUX, TAPE 1, TAPE 2/DAT
80 dB
Frequency response
PHONO RIAA standard curve
+0.2 dB (20 Hz~20 kHz)
TUNER, CD, AUX, TAPE 1, TAPE 2/DAT
0.8 Hz~150 kHz (-3 dB)
+0, -0.1 dB (20 Hz~20 kHz)
POWER AMP DIRECT 0.8 Hz~150 kHz (—3 dB)
Tone controls
BASS 50 Hz, +10 dB~ —10 dB
TREBLE 20 kHz, +10 dB~—10 dB
Loudness control (volume at —30 dB)
50 Hz, +9 dB
Matsushita
Electric
Trading
Co.,
Ltd.
PO. Box 288. Central Osaka Japan
Color
(K)z.cetses Black Type
Continental Europe.
Holland.
Belgium.
France.
United Kingdom.
[EG] ........... F.R.Germany.
Asia,Latin America,
Middle Near East,
Africa & Oceania.
East PX.
European Military.
Muting —20 dB
Output voltage and impedance
TAPE1, 2/DAT REC OUT 150 mV
Channel balance, AUX 250 Hz~6,300 Hz +1dB
Channel separation, AUX 1 kHz 55 dB
M@ DIGITAL SECTION
Harmonic distortion 0.002%
Total harmonic distortion 0.003%
S/N 110 dB
Dynamic range 99 dB
Frequency response
2 Hz~20 kHz, +0.3 dB. —0.3 dB
@ GENERAL
Power consumption 765W
Power supply
For continental Europe AC 50 Hz/60 Hz, 220V
For United Kingdom, Australia and others
AC 50 Hz/60 Hz, 110V/127V/220V/240V
Dimensions (WxH~D) 430 x 158 x 397 mm
(16-15/16" x 6-7/32" x 15-5/8")
Weight 13.2 kg (29.04 Ib.)
Notes:
1. Specifications are subject to change without
notice.
Weight and dimensions are approximate.
2. Total harmonic distortion is measured by the
digital spectrum analyzer (H.P. 3045 system).
Panasonic Tokyo Office
Matsushita Electric Trading Co., Ltd.
6th Floor, Worid Trade Center Bidg.,
No. 4-1, Hamamatsu-cho 2-Chome, Minato-ku,
Tokyo 105, Japan
ORDER
NO.
HAD8802028C9
|
SU-V90D]
ual
Amplifier
SU-V90D
m CONTENTS
Page
BEFORE REPAIR AND ADJUSTMENT ................- 2
PROTECTION CIRCUITRY
AGCESSORY. tise sssstacbecieccencecsev-geseceyyancdvosestaseseteses
LOCATION OF CONTROLS. 0.0... cc cecececeeeeeceneeeeene 3,4
CONNEGTIONS |... 5. sescbeveceeese aus Syaceaseseecteessusexsentes ods 5,6
DISASSEMBLY INSTRUCTIONS ............cceeeseteee 7~ 10
SCHEMATIC DIAGRAM .... cee cece cecseceeeseneteeneeeees 11 ~ 22
TERMINAL GUIDE OF
TRANSISTORS, DIODES AND IC’S ............000 22
Page
PRINTED CIRCUIT BOARDS .............cccecceeeeeeeerereneee 23 ~ 28
BLOCK DIAGRAM uo... ee eee ceee eee eee cece eneeee rece neneeeenaee 29,30
WIRING CONNECTION DIAGRAM .............cceeeeeeeeee 31,32
FUNCTION OF IC TERMINALS. ou... eeceeeeeeeaeeees 33,34
MEASUREMENTS AND ADJUSTMENTS ............... 35,36
EXPLODED VIEW ....sescscccsssstssessecenseteetee
REPLACEMENT PARTS LIST ......--eses00
RESISTORS AND CAPACITORS
m= BEFORE REPAIR AND ADJUSTMENT
(1) Turn off the power supply. Using a 100, 10W resistor, shortcircuit both ends of power supply capacitors
(C609,C610)in order to discharge the voltage.
(2) Before turning on the power switch of the unit.
A. Connect the voltage controller to the primary side.
B.
Connect
the
AC
ampere
meter
to
the
primary
side
or
connect
the
DC
voltage
meter
to
the
“+B”
circuit
of the secondary side.
C. Turn the VR of ICQ(VR401,VR402,VR551 and VR552)to minimum(counterclockwise).
D. After setting the output to zero of the voltage contoller,turn on the power switch of the unit.
And increase the output of voltage controller gradually.
Then, check carefully whether the current value of primary side become more than following value or
whether the DC voltage of secondary side is increasing slowly.
E. If the value of current is increasing unusually or the DC voltage is not increasing,lower the output
level of voltage contoller immediately.
@ The current value of the primary side at no signal. (Confirm the power supply voltage of each area and provided
voltage of the unit.)
The protection circuitry of the amplifier may have
operated if either of the following conditions is noticed:
@ No sound is heard when the power is turned on.
@ Sound stops during a performance.
The function of this circuitry is to prevent circuitry damage
if, for example, the positive and negative speaker
connection wires are “shorted” , or if speaker systems with
an impedance less than the indicated rated impedance
of the amplifier are used.
ACCESSORY
@ AC power SUPPLY COP... cece cece ceceseeneeeneaeaaaeneaees 1
For United Kingdom and some areas, the power cord is directly
attached to the unit.
Configuration of AC power supply cord differs according to
area.
Power supply voltage AC110V AC127V AC220V AC240V
Consumed current 50/60Hz 270 ~ 730mA 240 ~ 630mA 130 ~ 370mA 120 ~ 330mA
m PROTECTION CIRCUITRY
If this occurs, follow the procedure outlined below:
1.Turn off the power.
2.Determine the cause of the problem and correct it.
3.Turn on the power once again.
Note:
When the protection circuitry functions, the unit will not
operate unless the power is first turned off and then
on again.
SFDACO5E03
[E, EF, El, EB, EH, EG)
QFC1205M [EK]
SJA190 [XL]
SJA111 [XA]
RJAS2YA [PA, PE]

m LOCATION OF CONTROLS
2} {3} 4 5 |
Technics || dgitar rosaesteg| aowaten
islreiseals
Power switch (power)
[2] Speaker selectors (speakers)
These selectors are used to turn the speaker systems on and
off.
wo
Operation indicator (operation)
This indicator illuminates approximately 5 seconds after the
power is switched ON, indicating that this unit is in the opera-
tional condition. If there is any abnormal condition of the out-
put signals to the speaker systems (such as, for example, a
short-circuit of the speaker connection wires, etc.), this abnor-
mal condition will be detected, the protection circuitry will
function, and this indicator will stop illumination.
[4] Sampling frequency indicators
(sampling frequency)
These indicators function to illuminate to indicate the detec-
tion of the sampling frequency of the digital signals input to the
“DIGITAL INPUT” terminals on the rear panel of this unit.
(Ilumination occurs when digital signals are received, even a
digital component is not in the play mode.)
32 kHz: For digital signals with the sampling frequency of
32 kHz mode
44.1 kHz: CD and others
48 kHz: For digital signals with the sampling frequency of
48 kHz mode
[5] Audio muting switch (muting)
Set to the ‘‘—20 dB” position when a disc is being changed or
to temporarily reduce the volume level (approx. 1/10).
6} [7 jL8} [9
a
Loudness switch (loudness)
Set to the ‘on’ position when listening to music at low
volume. Auditory perception of sound in the tow frequency
range falls off at low volume, but when the switch is in this posi-
tion, this deficiency is compensated for, so that the full impact
of the musical performance can be enjoyed.
7| Digital input selector (digital input)
This selector is used when a component connected to one of
the “DIGITAL INPUT” terminals (on the rear panel of this unit)
is to be used as the sound source.
Power amplifier direct switch/indicator
(power amp direct)
When this switch is switched ON (Indicator will illuminate.), a
superior level of tone quality can be obtained, because the
signals from the component connected to the “POWER AMP
DIRECT” terminals or the “DIGITAL INPUT” terminals are
sent directly to the sound volume, without passing through the
tone control circuit, etc. of this unit.
[9] Digital/analog selector/indicators
(digital/analog)
This selector is used (when the is ON) to
select, as the signal source, either the component connected
to the “DIGITAL INPUT” terminals or the component con-
nected to the “POWER AMP DIRECT” terminals.
One of the indicators will indicate which source is selected.
Block diagram
ou
|
Phono cartridge
Ti] selector selector
ANALOG
INPUT
|
Class
AA
Mutin:
PHONOO
EQ
amp.
:
Input/
switch
TUNERO
recording-
CDO
source
AUX
selectors
TAPE
10-———
TAPE
2/DATO
peihiag
REC
OUT
ess
TAPE
1°
TAPE
2/DATO
Rec out
selector
Selector control
POWER AMP.
a
DIRECT “> wb wb
DIGITAL INPUT (2) Class AA To each circuit To each circuit
OPTICAL O Digital input ~ buffer
&) selector DIA amp.
COAXIAL O converter Power Amp Direct 8]
digital/analog
<a
Power switch
Active
servo Rectifier Power trans. O oe
power supply
Power
Tone control
, amp.
switch
(x)
Main
direct switch
© speaker
[18]
Speaker/
out
Tone
e, YY?
am. POD os
muting circuit Remote
© speaker
Speaker Bit
selector
Volume Balance 16]
control control
(10) Volume control/indicator (volume)
There are two types of volume scale indications: one for when
the [power amp direct! is OFF, and one for when it is ON
(Indicator will illuminate.).
11] Phono cartridge selector (phono selector)
This selector should be set to the position which corresponds
to the type of cartridge used on the turntable.
MM (=— &): Set to this position when using a moving-magnet
type cartridge or high-output moving-coil car-
tridge (1 mV or more).
MC (g— =): Set to this position when using a moving-coil
type cartridge.
12} Recording output signal indicators
(recording selector)
These indicators-indicate the sound source which can be
recorded.
3] Input signal indicators (input selector)
These indicators indicate the sound source of the sound being
heard from the speakers.
14] Input/recording-source selectors
Press to select the sound source to be listened to and/or the
sound source to be recorded.
Note that the function of these selectors changes depending
upon the setting of the recording-mode selector.
(Refer to ‘‘Recording-mode selector/indicator”’.)
15] Recording-mode selector/indicator (rec mode)
This selector is used to select the signal to be recorded by the
connected tape deck.
When this selector is pressed, the indicator flashes ON and
OFF repeatedly; when one of the input/recording-source selec-
tor is then pressed, this indicator changes from flashing to a
steady illumination.
If this selector is pressed while one of the recording output
signal indicators is illuminated, the recording-mode indicator
will change from a steady illumination to repeated flashing;
when it is pressed once again, the indicator will be extinguish-
ed.
When the recording-mode indicator is not illuminated:
If one of the input/recording-source selectors is pressed, the
sound source to be listened to and the recording sound source
will both be switched at the same time.
When the recording-mode indicator is flashing:
If one of the input/recording-source selectors is pressed, only
the recording sound source will be switched.
When the recording-mode indicator is illuminated:
{f one of the input/recording-source selectors is pressed, only
‘ the sound source to be listened to will be switched.
a
Balance control (balance)
This control is used to adjust left/right volume balance.
17] Tone control switch (tone control)
Set this switch to the “on” position if you want to adjust
the |bass] or |treble| tone quality.
18} Tone controls (bass/treble)
The bass control is for the low-frequency sound range, and the
treble control is for the high-frequency sound range.
[is]
Headphones jack (phones)
eb es lie 5: tte Te, OB oie

m CONNECTIONS
Placement with other
equipment
If this unit is to be placed on top of a compo-
nent that has a lesser depth dimension, be
sure to first change the location of the rear
“feet” of this unit, as described below.
(1) Remove the screws from the 4 feet of
this unit, and then remove the 4
insulators.
Insulator
Rearfeet
4
t
=
ry
[ Front feet
ae |
@ Re-install the front feet in their former
positions, and install the rear feet in the
positions shown in the illustration. (Be
sure to fit the projections into the holes
correctly before .tightening the 4
screws).
Note:
If the feet are later re-installed at their
original locations, be sure to use the
insulators in the way that they were
originally installed.
Connections to analog terminals
Make
connections
to
each
component
in
the
system
by
using
stereo
connection
cables
(option).
Tuner (option)
<=
(GND)(A)
(L)
;
To
ground
i"
_—
0
output
terminals
terminal
Compact
disc
player
(option
I
z
=
Ls
a
a
Ground
wire
(ae
a
(option)
EE
an
OG
Ee
To output terminals
Video disc player (audio only con-
nectable) (option)
Second tape deck (option) or digital
audio tape deck (DAT) (option)
To input terminais
\
z { 7 |S
A { | Colic [RES
5 [Ss Sen 000
“POWER AMP
DIRECT” terminals
The sounds from a component
connected to this terminals can-
not be recorded.
Compact disc player (option)
(R)
(L)
To output terminals
Tape deck 1 (option)
To input (“LINE IN”) terminals
aj [ma] a
S880
= LOR
To
output
(“LINE
OUT”)
tefminals
co
co
To output
terminals
COAXIAL
OPTICAL
DIGITAL INPUT
: Coa
Stereo connection (opt
Av OR
oO
ReneRERORE 7
cables (option) or
Optical-fiber cable (option)
Digital audio tape deck (DA
This
unit
If
connections
are
made
to
this
unit
from
a
“DIGITAL
OUT”
—
(“OPTICAL”
or
“COAXIAL"”)
terminal
of
the
digital
audio
tape
A
deck
and,
at
the
same
time,
from
its
“ANALOG”
(“LINE
IN’’
and
“LINE OUT”) terminals, make the connection from the
“ANALOG” terminals of the DAT deck to the “TAPE 2/DAT” ter-
minals of this unit.
—
If
the
“ANALOG”
terminals
of
the
DAT
deck
are
connected
to
xial
cable
the
“TAPE
1”
terminals
of
this
unit,
a
“loop”
may
occur
of
the
ion)
digital
signals
and
the
analog
signals.
eSounds
from
the
component
connected
to the
“DIGITAL
INPUT” terminals of this unit can be recorded only by the tape
deck connected to the “TAPE 1” terminals.
(Refer to “Recording” on page 10.)
For detailed information concerning DAT recording, refer to the
operating instructions of the DAT deck.
Renee
T) (option)
[SU-V90D
Note:
Careful
note
should
be
taken
of
the
following
points.
If
these
points
are
not
heeded,
a
maifunction
of
the
unit’s
operation
could
occur.
1.
Only
analog-type
components
should
be
connected
to
the
analog
input
terminals.
2.
Only
digital-type
components
should
be
connected
to
the
digital
input
terminals.
3.
Optical-fiber
cables
must
absolutely
never
be
bent.
Connections
to
“DIGITAL
INPUT”
terminals
This terminal can be used for the connection
of a compact disc player equipped with a
“DIGITAL” terminal or a digital audio tape
deck (DAT) used for playback only, etc.
Compact disc player (option)
== = =] To “COAXIAL
(ie is]
cE
7
“CTE
CL
:
Ly
OUT”
terminal
Coaxial cable od
= ki T {JB
This terminal can be used for the connection
of a compact disc player equipped with a
“DIGITAL” terminal or a digital audio tape
deck (DAT) used for playback only, etc.
Digital audio tape deck (DAT) (option)
pr Ss | F=
°
To “OPTICAL OUT” terminal
Hi About the “COAXIAL”
terminal
This terminal is a 75-ohm coaxial terminal;
using a toroidal pulse transformer, it func-
tions to provide electrical oscillation bet-
ween components, thereby preventing
signal deterioration resulting from noise
generated within the ground loop, etc.
@ About the “OPTICAL”
terminal
This terminal is an optical-connector ter-
minal; because electric signals are con-
verted to optical signals for transmission,
there is no adverse effect upon the signals
as a result of externally generated elec-
trical noise, thus making possible the
transmission of digital audio signals of
extremely high quality.
Optical-fiber cable (option)
A
dust-protection
cap
is
used
to
cover
and
protect
the
“OPTICAL”
terminal.
Remove
this
cap
only
when
the
“OPTICAL”
terminal
is
to
be
used.
When attaching
the cap, be sure
that it fits
correctly.
L = =’)
Dust-protection cap
Note:
Be sure to use the dust-protection cap to
again cover the “OPTICAL” terminal when
it is not being used.
This cover serves to prevent the entry of
dust, etc. into the terminal, because such
foreign material can cause incorrect
operation.
“SPEAKERS” terminals
MiLoad impedance:
e When only the “MAIN” or only the
“REMOTE"terminals are used: 4—16
ohms
¢ When both the “MAIN and the
"REMOTE" terminals are used
simultaneously: 8— 16 ohms
WiConnection of speaker wires
@ Strip off the outer covering, and twist
the center conductor.
(@® Turn 5~6 times.
@) Insert wire and tighten screw
completely.
0 — 2) 3) _—-
— :
15 mm
nd (19/32”) =
—--
Twist
Notes:
1. To prevent damage to
circuitry, never short-
circuit plus (+) and
minus (—) speaker
terminals.
. Be sure to only connect positive (+)
cords to positive (+) terminals, and
negative (—) cords to negative
(—)terminals.
(right) 23 left)
Remote speaker systems (option)
AC power supply cord
(Taxed ivret-xe))
e For United Kingdom and sorte areas, the
power cord is directly attached to the unit.
¢ Fit a suitable plug to the AC power supply
cord.
¢ Configuration of AC power supply cord dif-
fers according to area.
H Ousehold AC
outlet

SU-V90D
m@ DISASSEMBLY INSTRUCTIONS
—--—
Ref No. 1 How to remove the cabinet
Procedure
1 1. Remove the 6 screws (@~@) and remove
the cabinet.
| RetNo.2 | How to remove the DAC P.C.B. (small size), the digital input terminal
P.C.B. and the DAC P.C.B. (middle size)
12 1. Remove the 2 screws (@ and @) and remove the oO
upper DAC shielding cover.
2. Disconnect the connector (J11) and pull out the
2 flat cables ( J802 and J803).
3. Release the DAC P.C.B. (small size) from the
4 P.C.B. supporters.
4. Pull out the flat cable (J804).
5. Remove the 2 screws (@ and @) and remove the
digital input terminal P.C.B.
. Disconnect the 2 connectors (J10 and J12).
. Remove the 5 screws (@~@) and remove the DAC
P.C.B. (middle size).
Upper DAC shielding cover
“Nm
Note: How to remove the flat cable.
flat
cable
@Puil
out
the
flat cable with
the connector
connector pushing down.
DAC P.C.B. (small size)
P.C.B.
P.C.B. supporter
DAC P.C.B. (middle size)
SU-V90D
How to remove the input
terminal P.C.B. (large size)
How to remove the lower
DAC shielding cover
Ref No. 3
Procedure
12-3
Ref No. 4
Procedure
1-23-54
1. Disconnect the 4 connectors (J1, J2, J4
and J13).
2. Remove the latch (@).
3. Remove the 2 screws (@ and ©) and
remove the input terminal P.C.B. (large
size).
1. Remove the 3 screws (@~®).
How to remove the input
terminal P.C.B. (small size)
and the speaker terminal
P.C.B.
. Disconnect the connector (J5).
2. Remove the 2 screws (@ and @) and
remove the input terminal P.C.B.
3. Remove the 4 screws (@~@) and remove
the speaker terminal P.C.B.
How to remove the power
switch
Ref No. 6
Procedure
1-2-6
1. Push the power switch button from the
back of the front cover by using a
screwdriver and remove it.
2. Remove the 2 screws (@ and @).
Power switch button _e
Ref No. 7
Procedure
1>2>3-47
How to remove the front panel
1. Remove the 5 connectors (J1, J2, J4, J5 and J13)
and 3 flat cables (J14, J15 and J18).
2. Remove the 5 screws (@~@).

How
to
remove
the
headphones,
the
tone,
the
power
amp.
direct,
the
LED,
the
main
volume
and
phono
selector
P.C.
Boards
tas eLED P.C.B.
=e 6. Remove the LED P.C.B. by releasing the 2 claws in the
direction of the arrows.
eHeadphones P.C.B.
1. Remove the 2 screws (@ and @). ePower amp. direct P.C.B.
2. Remove the headphones P.C.B. by releasing the claw in 7. Remove the 2 screws (© and ®).
the direction of the arrow. 8. Disconnect the connector (J6).
9. Remove the power amp. direct P.C.B. by releasing the
©Tone P.C.B. 3 claws in the direction of the arrows.
3. Remove the 3 knobs (Q@~@) and 3 nuts (@~@).
4.
Remove
the
tone
P.C.B.
by
releasing
the
2
claws
in
the
eMain
volume
P.C.B.
direction of the arrows. 10. Remove the knob (@) and the nut (®).
5. Disconnect the connector (J17).
ePhono selector P.C.B.
11. Remove the 2 screws (@ and @) and remove the phono
selector P.C.B.
Power amp
direct P.C.B. Tone P.C.B.
Headphones P.C.B.
Main volume
P.C.B.
Phono selector P.C.B.
How to remove the
operation switch P.C.B.
How to remove the indicator
P.C.B.
Ref No. 10
Procedure
7—-8—9—10
Ref No. 9
1. Remove the 3 screws (@~®).
2. Remove the operation switch P.C.B. in the
direction of the arrow.
1. Remove the indicator P.C.B. by releasing
the 6 claws in the direction of the arrows.

| ef Nott How to remove the main P.C.B.
Procedure
152-3412] 4. pulloutthe 3 flat cables (J14, J15 and J18).
2. Remove the 8 screws (@~@).
How to remove the power transistors
Procedure
1—-2—>3—
4-11-12 1. Unsolder the terminals of the power transistors.
2. Remove the 4 screws (@~@).
Caution:
When reinstalling the power
transistors, be sure to apply
silicone compond (SZZOL15)
to the back of the power
transistors.
Fy Solder
—10—
ie Be Sta Ee Ag hi at te ae ve Oe fh a

lm
SCHEMATIC
DIAGRAM
1
2
3
4 5
6
7
8
9
(This schematic diagram may be modified at any time with the development of new technology.)
EY oicitaL input TERMINAL CIRCUIT
[> :
14. —C?}— Positive voltage lines. Eee bee ae
15. --("}*+ Negative voltage lines. 3 |
16. Indicated voltage values are the standard values for the unit measured by the DC electronic
R849 33K
1. $1 : Power switch in “on” position. A
(Ht off, = on) 1804
2. S2 : Voltage selector in “240 V" position. SVITORX 172 2 : 7 ne
For
(EK),
(XL),
(XA),
(PA)
and
(PC)
areas.
RETICAL
RECEYER
Bob
S¥00
TU
te
[EJ
0/4
converter
CIRCUIT
¢.
3. $101 : Phono selector switch in “MM” position. cone ne cane ee
(2. MM, = MC) aaseeane YM3623B oF
4. $201 : Power amp direct switch in “off” position. sii PROCESSING!
(1 off, = on) OPTICAL 1C806 SUL ty
5. $202 : Digital/analog selector switch in “analog” position. B oe fe 7 Sis es
(HL analog, m digital) ere A
6. $203 : Audio muting switch in “0 dB” position. SECA c bec ae
(MOB, = —20 dB) DIGITAL INPUT SIGNAL TARA hiv
7. $204 : Loudness switch in ‘‘off’’ position. ial
(1 off, m on) |
8. $301 : Tone control switch in ‘‘defeat” position. |
(1 defeat, = on) COAXIAL cers 10 \
9. $501-1 : Speaker select switch in “on” position. i
(1 off, = on) Cc ah |
10. $501-2 : Speaker select switch in “main” position. ne eo,
( main, = remote) cea! 01 Dagon icltigss mall pailcars
11. S701~S706, $708, S709 8 ah ere b
: Input/recording-source selector switch in ‘‘phono” position. : - oS fe 1804 t
$701: phono $702: digital $703: tuner 83 fi
$704: CD $705: aux $706: tape 1 Re24 12k
S708: tape 2/DAT S709: rec mode see jasoz as |+ |
12. $801 : Digital input selector switch in “optical” position. D te [= af) si set $y |
(f optical, m= coaxial) 892, S oY “ Ca) 60.1 |
13,» : Optical signal (Lch). c= : Phono signal (Lch). iz 2 |
\
!
=
'
circuit
tester
(high-
impedance)
with
the
chassis
taken
as
standard.
Therefore,
there
may
an
soi
9803,
805
+
exist
some
errors
in
the
voltage
values,
depending
on
the
internal
impedance
of
the
DC
ERR ae
nea
ae
eal
circuit tester.
17. Important safety notice: E cazs
Components identified by A\ mark have special characteristics important for safety. When
replacing any of these components, use only manufacturer's specified parts.
1cB02 QB02 Q806
MN74HCOO 2SA1309A UN4III
DIGITAL INPUT SELECT SWITCHING CONT. SWITCHING
*Caution! Hess. 860
IC and LSI are sensitive to static electricity. '
Secondary trouble can be prevented by taking care furing repair. ob. ney bigs Eady
*Cover
the
parts
boxes
made
of
plastics
with
aluminum
foil.
Sa
%
“Ground
the
soldering
iron.
F
3
*Put a conductive mat on the work table. s Sov &)
*Do
not
touch
the
legs
of
IC
or
LSI
with
the
fingers
directly.
3
|
(5)
oO
: in ol Bs
R841 560 : | ov
ee Pht es
te eee 5 vn
ke
MN53010PEH
. SERIAL/PARALLEL
'C807 4 | CONVERTER
G yusaoaa»|l//I1 MANE $25»
OIGITAL FILTER 4 " iH W
“Ny We
~ L-4 8 oo
R845 560 1 20
Bi (3)
1C814 3 1B
MNI23Z i | 3# | Re
FLIP-FLOP
‘
Fs
|
me
R846 560 ! eaees (6)
esti pas ! {ov
H ov UN42 II ae Loe
- w if
ie SWITCHING So \ R847 560 H | (8)
ha
Co)
s I
I
H i !
MN74HCOO sol P| L__
a : f fl
es Toa NAND GATE base ses 4
-11- 722

CONVERTER CIRCUIT
<iz0v R902 1/4 47
5B
1c902
5
SIGNAL
AN79NO5
$8
38
|
&
REGULATOR
ae
Se
it
|
3
=
|
ze06.
D823
mR
ORs
MAI65
:
iol
x
Ege tan Le Wek wer Teh, N h,
1c901 x i 4 : E
AN78MO5 b—s$--4 & Dees
REGULATOR 2 -rey [MALGS
P aslo
| UN4III
ae a Rm eS Fee ee ee oy ! 0% MUTING
1CB09~BI2 d = | aw CONTROL
PCM56P a | ov
D/A CONVERTER | o565 5g aig 7
—--~+aa}- +--+ +
ed ian!
' RELA
DA Converter ( ELAY DRIVE | C)
DC offset adj. R895 100K
e809
| UN4 111
\ RELAY DRIVE
s 1cas7
ig | HPD40538C
3 | 802 Teo! SWITCHING
@
ft 13
[ [ (©) (2) 1 ti R895 3.3K R877 1.8K
} 6} - as ——w-
vo
10853
10;
il
2Nia
RB6I
t
{4
}-—
—(4}-
|
1c8s7
c865 270P
859
0.001
(8K =
{ 1CB55
owe
regs 3.3K | Y) o-? R873 1.8K 820 |e
: bo Bed a emu
] 8) y oN es
Vv
R889 18K
R891 18K
I
b ow
= ovs5
80Vv agi A - i
al gov Z B| nc a
x
x | 55 { ; =
v gee 137) 2810 \ ae 2 2
BS_
é
i
ees
34
|
88
&
:
@ | $x rs ? |
=
E
°o
mo
« 8g cad
3
7 1C903 S ~~
d
3
MSF
78MO8|L
2
=
855,856
& REGULATOR 2 4 2 2SD1450
DA Converter 8 3 | MUTING
D
ta)
distortion
ad j.(LLch)
Q8si
2SK301
SWITCHING
(GAIN)
0851
MAI65
~-----------44444
ne 1C855,856 OPTICAL
pPC4570C SIGNAL
BUFFER AMP
#4
¢€913 10VI00
DA Converter
DC offset adj.
(Rch) ce54
Cc9tl 10vI00
*
R898
MSF 79MO8L
REGULATOR
2 °
3 =
S
Q8s2
2
e
R845 560 @ = >
&
,
2SK301
3
3
Vv SWITCHING Z s <
co} x bag =.
r4 8 (GAIN) a 2 ra
1m >
2
4 C809
0.01
DA Converter
distortion adj.(Rch)
-—13-— —14-

SU-V90D SU-V90D
23
24
25
26
27
28 29
31
32 33
34
35
36
[By PHono EQ INPUT SELECTOR CIRCUIT PHONO EQUALIZER
SWITCH CIRCUIT
GND &Y v2
CiH8 25V3.3
ces a ee
=
PHONO rs aie ise PHONO SIGNAL
(MM/MC) T (ich) ro--4
URch O 1 optical 1 $80) -
RUT
8.2
rd
Ei
INPUT)
eae
~ O | ; $204
S iol aw x“ be Hed ee pie
eek 668K 7 sonnets £1008 | [Roa 18K
TUNER
at
30Y
gio3
&
g
ore
ae:l)|
eae
ae => © R203
8
Ra “at DF aioi~i04 C105. RIN = “ x L 2008 _| 7
Band 2SK369 0.0022 100 % es =
i ole OIFFERENTIAL AMP 2 $ Say
r Lon @ 1 ovlov Hig ov & m “| 8
cD ait . © aii 7 icioz < 3
co}
LReh Oe : is z :
(gg e
Lon CH a r ig on : fl ES
i
Toe
]
{
|
' tot
A
oot
F
2)
flea Tex tae RII2 C106 pv ov 2) i
“o
7
pobadied
badd
Sebuee
I
Len
G4
=f
peta)
J
vi
REC
OUT
:
83
RI26
R120
Las
[ Ren > | by
TAPE
2/
DAT
6
ive
8
cio
|
cue
L chO4 i:
[ 1
tego cue '
LR ch SC iad
' | IC101 Ic102
3 M5218P MPC4570C
ae
EQUALIZER
AMP
EQUALIZER
AMP.
(VOLTAGE CONTROL) (CURRENT DRIVE) OPTICAL | INPUT/REC INDICATOR CIRCUIT
SIGNAL 1c701 Q702 Q703 Q701
a PD7566CS089 UN4alI 2SC33I11A
INPUT
SELECTOR
“e()
aNaloe
FUNCTION
CONTROL
SWITCHING
(RESET)
SWITCHING
CONT.
i!
R703 4.7K
aoaaes @)
h eagei a
ct
!
$101 H pe
(PHONO SELECTOR) |MM_—-——»_ MC id
i 4
Ly ET 7¥—=(5)
R202 IK
R201 1K
[J Prono sevector circuit
202 50V!
+
201 S0vI
IN/OUTPUT TERMINAL
CIRCUIT
R702 6.8K
(C703
DN74LS145
LED DRIVERIREC) ¢ ba
(OM)~C2)
p-L ech
POWER AMP
ANALOG
INPUT
‘
“Rech
a,
3
7
C)_@)@)@)
©)
©
en
e
|
a
Sern:
INPUT
SELECT
= S A pele pe pee WITCH CIRCUIT
REC OUT “Oy = OOO ©
[
L
Reh
o
es
I
|
TAPE | vl
(s)
|
ota
2
|
|
Aine
1°
0720)
o719/
0716
aes
©
$709)S702
|$706/S708/S705
|$704|$703|s701
Teel
y
uy
"|
Il
1€202
1c201
MODE
en
ear
hte
de
B)
A)
&)
@) TC9I64N TC9I63N bn 16. Foe riOe 1G idee a a
dl
ANALOG
FUNCTION
ANALOG
FUNCTION
{
{
|
|
|
|
|
|
oO
SWITCH
(REC)
SWITCH
(INPUT)
1
an
CORD
CAD
CSR)
A
?
'9
u
Oo715 ~722
LN088374P
—15— ~16-

35
R204
C203 0.12
KH
R209 22K
$204
(LOUDNESS }
R21 p--—n-4
18K | on 1
R212
36
an
-HING (RESET)
10] 0721
O715 ~722
LNO88374P
o7i9
€|TaPE| AU:
212 >1 4
z De
;
Q703
2SC3311A
SWITCHING CONT.
(REC)
R703 47K
1c702
ON74LSI45
LED DRIVE (INPUT)
(INPUT)
-13.8V
2SAIZ09A
C706 6VIOO
$202
(DiGHTAL/
0763 ,764
LNOI8397PH
= t
-I7BV
4
nm
{POWER
AMP
DIRECT)
- ee ie
rey bt =
cd 83m Se ic2s1 fa s
ag
De
ae
z
"s
-
£
a
2
= ‘2 ris
= ° S
8 Zz, ¢
x= n (=)
2 =
Pea ee
&
mx
ae
3
eo
°
3
2s Tie 23 2
1c251
M5238P
BUFFER AMP genesssssesttisteeeietiteareceiccetnccccceeeceeeiesetetecicisenSichal@ssiseeccesaenontiat
Mn g630M
oO
a da ge
ee i
Jo
re
VOLUME
CIRCUIT
Fs
_2
ge
os LNB46RP-C
é
=
Sonia ee HS CUE ae
[ML circuit
~ _- JB
. Q201,202
JIT “a a ’
: 2SK301
MUTING
d os x
vs is
‘
gx
a
“2
ga8 8 a iLSe
. = sol 08 eo
Ene we =
@ Ss aS _5-
33P | C303 e2P = 2 e-7ag4
a7s2 1 tk TET BLS 33s 38
Pa ge
UN421!1_ | 2SD1512 8303 S28 ee a
LED ORIVE | LED DRIVE an oy fee se 2
a 25
C205 sovo.2z2 Ov Dou o . oe
; x“ “
2 asvl a301 | 89v me Be ge
ab 2
R213 330K So Be +
9301, 302 88 ®
2 2SK389 305 C3Il 16V47
wt 305 DIFFERENTIAL | ee g.ooee | 9.0v 7
@) 0751 =A ° 18 ov 9303 43.3y AMP: “ ii ia
magoa7m
|
=
s
5
SX
B
ov
es
9303
ax
>
8
ae
ie
oe
Ga
ES
2SC3944A
iasv
TEN
+|8
é
Fs
1,830!
M5218P
EXTEND
ACTIVE
=
=
it
Si
(TONE
TONE
AMP
RTS3 3 SERVO s8h, rel+ 3 1s [CONTROE)
K 0 mg SSH 0303 8
Le ° 337 BR] we g 3 Sa
S 3 p 2 3
” madi
22x Se BSSE8
= e Pe Vvajye
n7sa eax | | & ) @ @® ‘ by | 7 __¢329 001
3 SOT
LED
DRIVE
Ae
eb
4
W
16302
8
C306
R312
2 (<5) M52I8P ca
ae ee : EXTEND ACTIVE
a
2]
z]
=
e
SERVO
asv}
a302_
|
8ov
3
= =
gs
3
3
=
G
302
lov
47
T)
ov
§
3
=
Jos”
~
8
Nas
cy
5
a
2 fg area ei ee ae
R304 wt m o390
\c75! pacae OO gl 238es-e eu
DN74LS145
om
oy
Fya5]
qs
give
LED DRIVE a 3 x &
©
5
meee!
°
°
=
"
a
*
€330
0.01
0
& =
9
3
a8
+]
¢0
=
os
@-OO)-E 4) g RSS mss
© OO ov a| 8g og
oO
0708~714
LNO74373P
SU-V90D SU-V90D
TONE AMP/LED DRIVE /
EXTEND ACTIVE SERVO CIRCUIT
LA7=
0765 ~768
LNO41373P1
R332 15K
EXTEND ACTIVE SERVO
8.2V soy b
CY — fan a
“177 -39.7V es
Q304 +f 38
2SAI535A coat
TONE AMP
—18—
46
47
48