Pioneer SA-5800 User manual

In this photo you can see Model SA-5800
Service
anual
STEREO AMPLIFIER
A-58S00
A-50&
Q) PIONEER’

Both
Model
SA-5800
and
Model
SA-508
have
the
same
basic
performance.
The
major
difference
is
in
appearance,
Model
SA-5800
being
fitted
with
wooden
side
cover
and
top
cover,
while
Model
SA-508
employs
metal
cover.
The
following
table
is
displayed
on
the
SA-5800
and
SA-508.
MODEL SA-5800
KU 120V only U.S.A, model
KC 120V only Canada model
MODEL SA-508
This
service
manual
is
applicable
to
the
KU
type
of
the
Model
SA-5800
and
the
Model
SA-508.
When
re-
pairing
the
KC
type
of
the
Model
SA-5800
and
the
S
type
of
the
Model
SA-508,
please
see
the
additional
service
manual
(ART-373),
and
for
HE, HB,
HP
types
of
the
SA-508,
please
see
the
additional
service
manual
(ART-374).
CONTENTS
1.
SPECIFICATIONS
.......0.
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cece
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ee
3
9.
SCHEMATIC
DIAGRAM,
P.C.
BOARD
2.
FRONT
PANEL
FACILITIES..............
4
PATTERNS
AND
PARTS
LIST
3.
BLOCK
DIAGRAM.................-...
6
9.1
Miscellanea
..
2...
.
ee
ee
14
4.
CIRCUIT
DESCRIPTIONS................
6
O12
“Schematic
Disgaea
awsansie
ks
bis
5.
DISASSEMBLY
.........---c0--ee-
00.
8
9.3.
P.C.
Board
Connection
Diagram..,......
18
6.
ADJUSTMENTS.
.........--00e
cece
cee.
9
9.4
Parts
List
of
P.C.
Board
Assemblies.......
21
PPAR
eNCCRTGN
cacti
,
.
(OAPACKING
3
Daaaue
ecu
cde
kh
nin
ate,
ahem
23
SEVERODED
VIEW
oak
okie:
ye
11.
SUPPLEMENTS
FOR
MODEL
SA-508/KU.....
23

1. SPECIFICATIONS
Semiconductors
ICS ci ieee he oS oR ee See en MA aa eae 3
TETANSIStOPS <4. 8. eb oe BA els ee Ee eck 24
DIOdES. wie ekg oe ete et in eed Cee ELS 18
Amplifier Section
Continuous Power Output of 25 watts* per
channel, min., at 8 ohms from 20 Hertz to
20,000 Hertz with no more than 0.03 %
total harmonic distortion or 25 watts per
channel at 4 ohms from 20 Hertz to 20,000
Hertz with no more than
harmonic distortion.
Total Harmonic Distortion (20 Hertz to 20,000 Hertz,
8 ohms, from AUX)
continuous rated power output .. No more than 0.03%
12.5 watts per channel power output
Bitrate ale senses Md hte suatSs No more than 0.03%
0.05% _ total
i hace te tee eto aes No more than 0.03%
Intermodulation Distortion (50 Hertz: 7,000 Hertz = 4:1,
8 ohms, from AUX)
continuous rated power output .. No more than 0.03%
12.5 watts per channel power output
SEEACRESAE aa ae Baus S74 No more than 0.03%
te Dad canoe inch ch noes No more than 0.03%
Output
SPOaken sescescw ge dees WA RAG aden eee ae A, B, A+B
4~16 ohms
Headphones..............00055 Low impedance
Damping Factor (1,000 Hertz, 8 ohms)........... 30
Input (Sensitivity/Impedance)
PHONO? 6.05 snide See tren hed Beek & 2.5mV/47kilohms
TUNER: 2 fn. ee a eee ete 150mV/S50kilohms
AUX 23.5 Spee oe Se Ee oes eek 150mV/50kilohms
TAPE:PLAY © os ecdee es dete tenet 150mV/50kilohms
TARE PEAY 200.0 ch oan ee a? 150mV/50kilohms
Phono Overload Level (T.H.D. 0.1% 1,000Hz)
PHONO? 0 2 seca tnaeeu sete Ss oes 140mV
Output
TAPE RECA. oug wie iat Srentnscihen ed anh eves Jeane 150mV
TAPE REG 2... ge tee ead ks kd ae 150mV
Frequency Response
PHONO (RIAA Equalization)
ot, ase ae Fe 30Hz to 15,000Hz +0.5dB
Da Gua? Bae eas 20Hz to 40,000Hz +2dB
Tone Control
BASS ss ws Pace ee eds +7,5dB, — 7.5dB (100Hz)
TREBLE + -i6 gs aeeceshess +8dB, —8dB (10kHz)
SA-5800
Subsonic Filter... ...........0004 15Hz (—6dB/oct)
Loudness Contour (Volume control set at -40dB
POSITION) 06 pears Gal Se Sle Kg Bob wens +6dB (100Hz)
Hum and Noise (IHF, short-circuited, A network)
PHONO) 3. csv beso ee a oe 3 ee a 76dB
TUNER, AUX, TAPE PLAY............... 98dB
Miscellaneous
Power Requirements ...............65 120V, 60Hz
Power Consumption ......... 75W (UL), 180W (CSA)
Dimensions .......... 451(W) x 151(H) x 271(D)mm
17-3/4(W) x 5-15/16(H) x 10-11/16(D) irr
Weight
(without
package)........---
7.3kg
(16lb
20z)
Furnished parts
Operating instructions... 2... 0.0... eee ee eee ]
* Measured pursuant to Federal Trade Commission’s
Trade Regulation rule on Power Output. Claims for
Amplifiers.
NOTE:
Specifications and the design subject to possible modifi-
cation without notice due to improvements.

2.FRONT
PANEL
FACILITIES
@® POWER SWITCH
Set
this
switch
to
ON
to
supply
power
to
the
amplifier.
@ SPEAKER SELECTOR
Use
this
selector
to
select
the
speaker
systems.
OFF:
Sound
not
obtained
from
speakers.
A:
Sound
obtained
from
speakers
connected
to
the
A
speaker
terminals.
B:
Sound
obtained
from
speakers
connected
to
the
B
speaker
terminals.
A+B:
Sound
obtained
from
speakers
connected
to
both
A
and
B
speaker
terminals.
@ POWER METER
This
meter
allows
you
to
read
out
the
rated
power
level
on
the
fluorescent
display
tube
when
speakers
with
a
nominal
impedance
of
8
ohms
are
connected
to
the
amplifier’s
speaker
terminals.
@ FUNCTION INDICATORS
The
TUNER,
PHONO,
AUX
function
indicators
light
up
in
accordance
with
the
position
of
the
function
selector.
NOTE:
The
function
indicator
will
not
go
off
even
when
the
tape
monitor
switch
1
or
2
is
set
to
ON.
@ LOUDNESS SWITCH
When
listening
to
a
performance
with
the
volume
control
turned
down,
set
this
switch
to
ON
and
the
bass
will
be
accentuated.
When
the
volume
is
low,
the
human
ear
finds
it
harder
to
hear
the
bass
than
when
the
volume
is
high.
The
loudness
switch
is
thus
designed
to
compensate
for
this
deficiency.
By
setting
it
to
ON,
the
bass
comes
through
much
more
strongly
and
the
sound
takes
on
a
punch
even
when
the
volume
control
is
turned
down.
: ae

© VOLUME CONTROL
Use this control to adjust the output level to the
speakers and headphones. Turn it clockwise to
increase the output level. No sound will be heard
if you set it to “0”.
@ HEADPHONE JACK
Plug the headphones into this jack when you
want to listen through your stereo headphones.
NOTE:
Set the speaker selector to OFF when listening only with
headphones.
(8)
BASS
AND
TREBLE
CONTROLS
Use these controls to adjust the bass and the
treble. If you turn the bass control to the right
from its center position, you will be able to
emphasize the sound in the low-frequency range.
Conversely, turning this control left from the
center position, you will attenuate the sound.
You can use the treble control to adjust the
sound in the high-frequency range.
@ BALANCE CONTROL
Use this control to balance the volume of the left
and right channels. If the sound appears to be
louder on the right, it means that the volume of
the right channel is higher. Turn the balance
contro! to the left and adjust.
Conversely, if the sound appears to be louder on
the left, it means that the volume of the left
channel is higher. Therefore, turn the balance
control to the right and adjust.
SUBSONIC FILTER SWITCH
When this switch is set to the 15Hz position, the
subsonic filter with a cut-off frequency of 15Hz is
actuated. The subsonic filter serves to attenuate
frequencies lower than 15Hz in a 6dB/oct slope.
It is therefore effective in suppressing ultra-low-
frequency noise which is generated by record
warp and other causes. You cannot actually hear
this noise but it is a factor in the generation of
intermodulation distortion and it may damage
your speaker system. Set this switch to the 15Hz
position during record play for the best effect.
SA-5800
d) FUNCTION SELECTOR
Use this selector to select the program source.
When set, the function indicator above the meter
panel corresponding to the position of the func-
tion selector will light up.
TUNER: Set here when listening to broadcasts
on a tuner connected to the TUNER jacks.
(The TUNER function indicator lights up.)
PHONO: Set here when playing records on a
turntable connected to the PHONO jacks.
(The PHONO function indicator lights up.)
AUX: Set here when listening to a program
source which is connected to the AUX
jacks.
(The AUX function indicator lights up.)
42 TAPE MONITOR SWITCHES (1, 2)
Use these switches to monitor recording or a tape
being played back on a tape deck.
1: Set this switch to ON when you want to
monitor a recording or a tape being played
back on a tape deck which is connected to the
TAPE 1 jacks.
2: Set this switch to ON when you want to
monitor a recording or a tape being played
back on a tape deck which is connected to the
TAPE 2 jacks.
NOTE:
Set these switches to the upper (OFF) position when
playing records or listening to broadcasts.

3.
BLOCK
DIAGRAM
fy
ae
PHONO
AUX
TUNER
REC PLAY REC PLAY
TAPE i TAPE 2
REC PLAY REC PLAY
R CHANNEL
RECTIFIER
} TO FLHEATER
4.
CIRCUIT
DESCRIPTIONS
Equalizer Amplifier
The
equalizer
amplifier
is
collector-to-emitter
feed
back
type
2-stage
direct-coupled
amplifier,
designed
with
a
gain
of
35.5dB
(at
1kHz),
a
over-
load
level
of
140mV
(at
1kHz,
THD
0.1%),
and
equalizer
deviation
of
+0.5dB
(30Hz-15kHz).
Power Amplifier
This all-stage direct-coupled pure complemen-
tary
SEPP
circuit
features
a
current
mirror
load
differential amplifier in the first stage, and in-
corporates the tone control circuits in the NFB
loop.
Although the incorporation of the tone control
circuits in the power amplifier stage reduces the
number of elements that the signal has to pass
through, and thereby further reduces noise, distor-
tion, and cost, the power stage does require a
higher gain and a higher degree of stability. In the
SA-5800, this high gain and high stability are
achieved by a current mirror load differential
amplifier in the first stage and by the use of a
bootstrap circuit for the load of the pre-driver
stage.
The power stage is a Darlington connection pure
complementary SEPP circuit, resulting in an
output power rating of 25W+25W (82, 20Hz-
20kHz, THD 0.03%).
ln 39.548
VOLUME | at IkHz
( SAME AS
VOLTAGE
REGULATOR
CONTROL
SUBSONIC
FUNCTION
© SPEAKER
lL
CHANNEL)
ore
.
© SPEAKER B
} TO POWER STAGE
TO
EQ
AMP,
POWER
AMP,
INDICATOR
DRIVE
CIRCUIT
The tone controls (BASS, TREBLE) are operat-
ed
by
changing
the
frequency
response
of
the
power amplifier NFB circuit.
Power Supply Muting
This
circuit
is
designed
to
eliminate
the
un-
wanted
click
noise
generated
when
the
power
switch
is
turned
on
and
off.
With
reference
to
Fig.
4-1,
when
the
power
switch
is
turned
on,
Q;
will
remain
off
because
of
-B,,
and
then
Q,
emitter
will
become
—0.6V
through
the
minus
voltage
supply
route
(D,,
D3,
and
R,,.).
The
Q,
base
voltage
will
increase,
the
rate
of
increase
being
determined
by
the
R2,
R;,
TO EQ AMP,
FIRST STAGE
OF POWER AMP.
POWER
ac -
LINE | :
TO POWER
STAGE
Fig. 4-1 Power supply and muting circuit

and C; time constant. Consequently, Q, emitter
voltage will rise by increase of the base voltage.
Therefore, the muting action when the power
switch is turned on is achieved by delaying the
supply of the +B, to the equalizer amplifier and
the first stage of the power amplifier.
When the power switch is turned off, the —B, is
discharged through the route R,;—> C,, and since
the residual voltage of C, is then applied to the
base of Q, through R, and R;, Q; is immediately
turned on. Therefore, the base voltage of the Q,
drops to OV, and the +B, supply to the equalizer
amplifier and the first stage of the power amplifier
are interrupted.
Indicator Circuit
The SA-5800 output power and function indi-
cators feature fluorescent indicator tube (FL
tube). In this tube, thermionic emissions from
the cathode are accelerated into the fluorescent
substance of the segmental anodes, resulting in the
emission of light. This tube is used to indicate
numerals, letters, and other symbols.
IC (TA73IGP) 172
SIGNAL INO
FLUORESCENT
FILAMENT
SA-5800
An outline of the FL tube drive circuit is shown
in Fig. 4-2. The output circuit signal is applied to
pin no. 6 (4) of the IC (TA7318P-A). The IC
contains a detector circuit, compressor (40dB),
and peak hold circuit for both left and right chan-
nels. The dynamic range of the signal is thus
contracted by 40dB to obtain a ‘‘peak held” DC
voltage.
The output power indicator segments of the FL
tube are driven by the HA12010 ICs (one for
each channel) equipped with 12 pairs of differen-
tial amplifiers. These amplifiers are biased at in-
creasing levels, so each amplifier will commence
to operate separately as the input level increases.
And since these amplifiers apply the voltages to
the output power indicator segments, each suc-
cessive segment will light up in turn as the input
level rises.
The function indicators are lit up as a result of a
voltage being applied to the corresponding func-
tion indicator segment according to the selected
positions of the FUNCTION switch.
INDICATOR TUBE
Fig. 4-2 Indicator circuit

5. DISASSEMBLY
Side Covers and Top Cover
1. Remove the four screws (A), and remove the
left and right-hand side covers.
2. Remove the two screws (B), and remove the
top cover.
Bottom Plate
Remove the four screws (C).
Front Panel
Pull off all the knobs, and remove the four nuts
(D).
Side cover
Front panel
Side cover

SA-5800
6. ADJUSTMENTS
Idie Current Adjustment
1.
Tum
the
VOLUME
control
down
to
minimum
level,
turn
the
power
on,
and
wait
about
10
minutes.
2.
Connect
a
DC
voltmeter
to
the
TP
terminals
(L
ch;
TP,
@®
and
TP,
©,
R
ch;
TP;
®
and
TP,
©)
of
the
GWK-128.
3.
Check
that
the
voltage
between
TP,
and
TP,
(L
ch)
lies
within
the
DC
4.4mV-35mV
range.
Then
make
a
similar
check
for
the
R
ch
(be-
tween
TP;
and
TP,
).
If
the
voltage
is
less
than
4.4mV,
cut
jumper
A
(L
ch),
and
jumper
B
(R
ch).
If
the
voltage
exceeds
35mV,
check
for
circuit
failure.
Jumper A Jumper B
Fig. 6-1
Output
Indicator
Adjustment
1.
Set
the
tone
control
to
the
flat
position.
2.
Set
the
SPEAKERS
selector
to
the
A
position,
and
connect
an
82
resistor
and
AC
voltmeter
to
the
speaker
output
terminals.
@—
vr,
3.
Set
the
FUNCTION
switch
to
the
AUX
posi-
©—vr,
tion,
and
apply
a
1kHz,
150mV
signal
to
the
AUX
input
terminals.
4.
Adjust
the
VOLUME
control
so
that
the
volt-
© ©
age
on
the
output
terminals
(SPEAKERS)
reads
9V
(AC).
5.
Adjust
VR,
(Lch)
and
VR,
(R
ch)
of
the
indi-
Cator
assembly
so
that
the
output
power
indi-
Fig.
6-2
cator
reads
10
watts.
Indicator assembly
Panel stay

e The A\ mark found on some component parts indicates
7.
PARTS
LOCATION
the
importance
of
the
safety
factor
of
the
part.
There-
fore, when replacing, be sure to use parts of identical
Front Panel View designation.
Front panel assembly Lever knob
ANB-736 AAD-183
Knob Knob
AAB-204 AAB-202
Lever knob
AAD-183
Lever knob
AAD-183
Knob
Knob AAB-203
AAB-204
Lever
knob
AAD-183
Front View with Panel Removed
Fluorescent indicator tube Lever switch (LOUDNESS)
AAV-004 ASK-155
Variable resistor
Rotary switch
(SPEAKERS)
(VOLUME)
2
Lever
switch
Lever switch (TAPE MONITOR 1, 2)
(POWER) ASK-156
ASK-514
8
Slide
rotary
switch
(FUNCTION)
Pa (PHONES) ASE-110 ;
Variable resistor (BASS) re a {SUBSONIC)
ACT-117 :
Variable resistor (TREBLE Variable resistor (BALANCE)
ACT-117
ACT-118
10

SA-5800
Top View
Fuse assembly
GWX-332
Equalizer assembly
GWF-123
Fuse (2.5A)
AEK-102
Power transformer
ATT-609
AF amp assembly
GWK-128
Headphone assembly =
GWX-324 £1e
Indicator assembly Volume assembly
AWV-004 GWX-323
Rear Panel View
Terminal (SPEAKERS) AC socket (AC OUTLETS)
AKE-026 AKP-032
Rte scent ———
Terminal (INPUT)
AKB-064
» eaten
G2 op MOT menanwe Screws, SEF SE RICE
AC power cord
Terminal (TAPE 1, 2) A\
ADG-023
AKB-063
44

EXPLODED VIEWS
No.
OP ONS
OB OND
Part No.
ABA-209
AMS-024
ANB-736
B71-004
M45-086
AAD.-183
AAB-204
AAB-202
AAB-203
AMS-023
e The f\ mark found on some component parts indicates the importance of the
safety factor of the part. Therefore, when replacing, be sure to use parts of
identical designation.
Description Key No.
Screw 4x15 11.
Side cover (L) 12.
Front panel assembly 13.
Nut M9 14.
Washer MQ 15.
Lever knob
Knob
Knob
Knob
Top cover
Part No.
ABA-204
ABA-048
AMS-025
B22-017
Description
Screw 3x6
Bottom plate
Screw 3x6
Side cover (R)
Washer
wn

Key No.
A
QRWN>
Part No.
ABA-069
ATT-609
AEK-102
GWX-332
ABA-048
AWV-004
AEC-570
ASB-051
ACG-001
AEC-294
ASK-514
AEK-100
GWX-324
GWX-323
ABN-050
Description
Screw 4x8
Power transformer
Wire saddle
Frame
Fuse (2.5A)
Fuse assembly
P.C. Board holder
Screw 3x6
Indicator assembly
Foot assembly
Rotary switch (SPEAKERS)
Ceramic capacitor
Capacitor cover
Lever switch (POWER)
Fuse (4A)
Headphone assembly
Volume assembly
Cushion
Panel stay
Union nut
SA-5800
Key No. _ Part No. Description
21. ABA-025 Screw 3x4
22. ABN-031 Nut M7
23. ABN-049 Union nut
24. ABA-049 Screw 3x8
25. GWK-128 AF amp assembly
A 26. AEK-106 Fuse (1A)
27. AEC-525 Rivet
28. Cord fixer
29. Frame
30. ABA-228 Screw 3x6
31. Rear panel
32. ABA-240 Screw 3x10
33. AEC-327 Strain relief
A 34. ADG-023 AC power cord
35. ABA-157 Screw 3x8
36. ABA-115 Screw
37. ABE-005 Washer
38. Termina! (GND)
A 39. AKP-032 AC socket (AC OUTLETS)
40. AKE-026 Terminal (SPEAKERS)
41. GWF-123 Equalizer assembly
13

9. SCHEMATIC DIAGRAM, P.C. BOARD PATTERNS
AND PARTS LIST
NOTES:
e When ordering resistors, first convert resistance values into code form as shown in
the following examples.
Ex. 1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm
and 47k ohm (tolerance is shown by J = 5%, and K = 10%).
5602 56 x 10! 56D veo nae 2 HAS RD%*PsS BBW
47k 47x 10° ATS eo nf. RD%PS (4(ABd
0.52 ORG re fr tons Santina hon to enetas san RN2H OREK
IQ ODO ics See aye Aa RSIP OMG K
Ex. 2 When there are 3 effective digits (such as in high precision metal film resis-
tors).
5.62k2. 562x10' 5621......... RN%SR BEAMF
e The A mark found on some component parts indicates the importance of the
safety factor of the part. Therefore, when replacing, be sure to use parts of
identical designation.
9.1 MISCELLANEA
Miscellaneous Parts List of Changed Parts for Factory Modification
SWITCHES
List
of
changed
parts
information
will
be
furnished
when-
ever necessary and you are requested to amend parts
PartNo. «Symbol & Description number in this parts list.
Part No. Descript
ASB-051
$2
Rotary
(SPEAKERS)
oe
uci
FUSES
Part No. Symbol & Description
A AEK-102 FU1 Fuse (2.5A)
A\ AEK-100 FU2,FU3 Fuse (4A)
Jy AEK-106 FU4 Fuse (1A)
P.C. BOARD ASSEMBLIES
Part No. Description
AWV-004 Indicator assembly
GWK-128 AF amp assembly
GWF-123 Equalizer assembly
GWX-323 Volume assembly
GWX-324 Headphone assembly
GWX-332 Fuse assembly
OTHERS
Part No. Symbol & Description
A ATT-609 T1 Power transformer
A ACG-001 Ci Ceramic capacitor
AKE-026
Terminal
(SPEAKERS)
A
AKP-032
AC
socket
(AC
OUTLETS)
14
oN

1
2
3
4
5
|
|
9.2 SCHEMATIC DIAGRAM
co - ee
' AF Ass'y GWK~-128
REC I
EQUALIZER Ass’y GWF- 123 L
(39) Q101, 102 cus
y 2SA796-F or G pues
VOLUME Assty GWX-323 fecal Ey as8 m een
Q107, 108
Q105, 106 < 2SCI735-C
H
2SCI438-B
oy
(2)
o107
or
D
ov 2 SS = a
s
hh om psc: HEADPHONE Ass'y
s A Lt ipH i re"
Fu2 44 | R403 33011/2W)
ae nN —— : —@ ie
é |
|
RIO3 33k
82k
AW
PHONO
Pd N
2:
S4: SB: =e 9
TUNER AUX STO TAPE ; mes @ A
S3: FUNCTION MONITOR 1 MONITOR2 ' $6: LOUONESS oTs R
Y
ASE-110
ASK-156
—
ASK-156
ASK-155
3
3—cL0
RUT 3.9%
9)
Q105 GF
i oui, 112 1 @ é
2SD883A R402
1
8
-QorR
®
56x
8 g - S
5 x Fa 32(-27.7)]
8 8 2
i 9
nozs
©
[e202
=
330/35
1 PHONO 4 DIOI~104 Rise Gee $7: SUBSONIC
"70S
$2076
ASK-158
o s7-1
g '
Reh
DI,
12
i 1S1555
3
1
5h = f-8N
QI, 2 2SCI626-0 or Y OFF ASB
2SCI3I8 -R or S S2: SPEAKER
TUNER © 93 D8 EQAOI-35R cA
b
s
DIO
MZ-157
QO®
_s0-081
AUX © }—a 104, ig @) ©
=
-_—_—
ee
-
ONAL
H 4
= cO) RO
= > O@®
rd
z
Q103,
104
Q109,
110
ba & 2SCI9I9-F or 6 2SA850-C or D SPEAKER
R 8 L
D9 1S 2076 | © © © o]
R © O O ©
= s @? ey re
7
Fane
=
oVewi
SPEAKER
ZN i A fia.iv7ea]
‘6
i E E INDICATOR Ass'y AWV-004
ATT-877 U3, 114
2SB773A
-QorR
'
1. RESISTOR;
Indicated in 9, 1/4W, 25% tolerance uniess otherwise
= noted k; kM, M; MQ, (F); £1%, (G); 2%, (K); £10%
gf tolerance.
0g va3s-2 C126 Riaz 2. CAPACITORS;
DIOS, 106 > Indicated capacity (uF }/voltage(V) unless otherwise
_ ' noted p; p
SINS 3h Indication without voltage is 5OV except electrolytic
capacitor. .
(3) 3. VOLTAGE, CURRENT; : |
(V] ; Signal voltage at 25W + 25W BM output
(4) y ; DC voltage (V) at no input signal
Value in ( ) is DC voltage at rated power.
<OMA ; DC current at no input signal
4, OTHERS;
=> Signal route.
@ , ; Adjusting point.
The /I\ mark found on some component parts indi-
C) cates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts of
identical designation.
COMPARATOR | |
z
(6)
COMPARATOR
rl
FUSE Ass'y This is the basic schematic diagram, but the
GWX-332 actual circuit may vary due to improve:
ments in design,
LEVEL ie SI
LEVEL SHIFT |
Lever a
SHIFT
‘VEL SHIFT Fel
FSET]
—
iiscehe
Mics
aa}
SWITCHED
Sl
POWER
ON-OFF
Q2,3
HAIZ0I0
AC POWER
CORD
SuPOWER
$2.
SPEAKERS
OFF-A-B-A+B
VRi,
2
ew
okies
$3
FUNCTION
‘TUNER-PHONO-AUX
LEVEL
Aby
ACP-078
$4
TAPE
MONITOR
1
OFF-ON
ACI2OW/SOHE
S5
TAPE
MONITOR
2
QFF-ON
;
£4
S6
LOUDNESS
OFF-ON
=e Ql
TA73I6P
UNSWITCHED
200W
SWITCHED
TOTAL
87
SUBSONIC
OFF-ON
@
1OOW
MAX
The underlined indicates the
switch position.
[ce ae

LAY
u
poumey,
C)REC 2
oO?
VR2: BALANCE '
4 AcT-118
s
2
=
s5-1
+
OFF OFF
2 ©
on ON
ut Ss:
APE TAPE
MONITOR | MONITOR 2|
SK-186 ASK-I56
-2
co -
VOLUME Assty GWX~323
VRI-l 250k
VRI: VOLUME
ACV-184
$6: LOUDNESS
ASK-155
VRI-2 250k
Di, 12
181555.
5
2 :
g
Qi, 2 2SC1626-0 or Y
03 2sci3I8-R or S [og cqaol-35R
DIO MZ-157
) u
_ °
‘ $3-3 A :
; =
ana oP-200
05-7
tOE2
D9 IS 2076
L. 9-6-4 -@)
©
V¥V-004 O
0)
AAV-004
iets fia ge Ue sal
AF Ass'y
GWK- 128
RIO3 33x
QIdl, 102
2SA798-F or G Q107, 108
Q105, 106 2SCI735-C
2SCI438-B in or D
ov 8
3
oe
om
8
S
34 3.8) S20 32(27.7) { |
tal 1!
raor HEADPHONE Ass'y
GxW-324
i
Fu2 4A | R403 3300/2W)
RUS 100k
QU, 12
2SD883A
-QorR
[-32(-27.7)|
RIN Ok
DIOI~104
1S 2076
Ty
ATT-609 \
FUSE Ass'y
GWX-332
AC POWER CORD SuPOWER
ADG - 023 ASK-514
secowons Lr
UNSWITCHED 200W SWITCHED TOTAL
1OOW MAX
DIOS, 106
STV-3H
Q103, 104
$7: SUBSONIC
ASK-155
© VR3: TREBLE
a ACT-117
VR4: BASS
ACT-117
Qlos, 110
2SA850-C or D
2SCI9I9-F or G
R40 C124 -yR3-2 CI26
©)
7 NGS &
®-@)
2 b>
'
R404 3300/2W) |
1
@?)
R402
@—Wv AT SP IW |
a
OFF AtB
BOOM
© ©
© PO @
©) ©
O@®@
SPEAKER
R 8 L
[o © © o]
12 © © OF
SPEAKER
A 4.1V/ BQ]
1, RESISTOR;
Indicated in 2, 1/4W, +5% tolerance unless otherwise
noted k; k2, M; MQ, (F); 21%, (G); #2%, (K); 10%
tolerance.
2. CAPACITORS;
Indicated in capacity (uF )/voltage(V) unless otherwise
noted p; pF
Indication without voltage is 50V except electrolytic
capacitor.
3. VOLTAGE, CURRENT; .
'V] ; Signal voltage at 25W + 25W 82 output
5] : DC voltage (V) at no input signal
Value in ( ) is DC voltage at rated power.
OMA ; OC current at no input signal
4. OTHERS; :
=> Signal route.
@ 4 ; Adjusting point.
The A mark found on some component parts indi-
cates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts of
identical designation.
This is the basic schematic diagram, but the
actual circuit may vary due to improve-
ments in design.
SWITCHED
Sl POWER ON-OFF
S2 SPEAKERS OFF~A-B-A+B
$3. FUNCTION TUNER-PHONO-AUX
S4 TAPE MONITOR 1 OFF-oNn
S5 TAPE MONITOR 2 OFF-ON
S6 LOUDNESS OFF-on
S7 SUBSONIC OFF-ON
The underlined indicates the
switch position.
SA-5800
8 9
NOTE:
The indicated semiconductors are representative ones
only. Other alternative semiconductors may be used and
are listed in the parts list.
External
Appearance
of
Transistors
and
ICs
2SA850
28C1735 2S8C1919
Lot No Lot No
Type No Type No
hre hre
B B
c c
E E
2SA750
2SC1400 2S8C1318
TyseNe Lot No Type No
hre hee Lot No
B
E E
c c
B B
2SA798 2SC 1626
Type No
Lot No hre
BI
cl
E
c2
B2
2SA726S
re Dot TA7318P
0
lo 9 ‘ Cc
ies Type No
B
£ E
2SB773A
2SD883A HA12010
4
28C1438
Type
No.
D
hee
Lot
No
17

9.3. P.C. BOARDS CONNECTION DIAGRAM
AF AMP Ass’y
GWK-128
‘832901318 - RorS ;
LEAT ESS |
ADPHONES
SPEAKER
B
14.1V/82
EQ Ass’y
GWF-123
28CI9I9-Forg 00%
2sciao ry
% dda a
ISIS55
or IS2473
18

AF AMP Ass’y
GWK-128
FUSE Ass’y
GWX-332
SWITCHED TOTAL 100W UNSWITCHED 200W
AC 120V/60Hz
, RwK
oa 0 |
VOLUME Ass’y
GWX-323
ELT LARCH
eam
1S1555
“4. or 1S2473 ;

9.4 PARTS LIST OF P.C. BOARD ASSEMBLIES
Equalizer Assembly (GWF-123)
CAPACITORS
Part No. Symbol & Description
CEANL R47M 50 C201, C202, C212, C213
CEA 221P 35 C203
CEA 221P 10 C206, C207
CEA 101P 6 C210, C211
CEA 471P 35 C220
CCDSL
100F
50
C204, C205, C208,
C209
CCDSL 181K 50 C218, C219
CKDYA 302J 50 C216, C217
CQMA 103J 50 C214, C215
Note: When ordering resistors, convert the
resistance value into code form, and
RESISTORS then rewrite the part no. as before.
Part No. Symbol & Description
RD%PM O00 JNL
R201—R206, R210, R211, R220, R221,
R226, R227
RO“PM
O00
J
R207—R209,
R214—R219,
R222—R225
R212, R213
SEMICONDUCTORS
Part No. Symbol & Description
2S8C1919 Q201, Q202
(2SC1400)
2SA726S Q203, A204
(2SA750)
OTHER
Part No. Symbol! & Description
AKB-064 Terminal (INPUT)
AF Amp Assembly (GWK-128)
CAPACITORS
Part No. Symbol & Description
CEA 331P 63 C1
A\ ACH-203 C2, C3
CEA 101P 50 C4, C5
CEA 470P 50 C6
CEA 220P 16 C105, C106
CEA 101P 35 C109, C110
CEA 331P 35 C133, C134
CEANL R10M 50 C103, C104
CEANL R47M 50 C131, C132
CEANL 2R2M 50 C101, C102
CEANLNPO10M50_ C119, C120
A AcCG.004 C8
CCDSL 150K 50 C121, C122
SA-5800
Part No. Symbol & Description
CCDSL 330K 500 C107, C108
CCDSL 181K 50 C113—C116
CKDYF 473Z 50 C7, C117, C118
CCDSL 101K 50 C135, C136
CQMA 122J 50 C123, C124
CQMA 562J 50 C125, C126
CQMA 303J 50 C127, C128
CQMA 124J 50 C129, C130
Note:
When
ordering
resistors,
convert
the
resistance
value
into
code
form,
and
RESISTORS
then
rewrite
the
part
no.
as
before.
Part
No.
Symbol
&
Description
A
RD%PSF
OOOY
R1,
R6,
R127,
R128,
R135—R138
RD%PM
OOO
J
R2—R5,
R8B—R12,
R101—R126,
R139—R150
A
RD¥Y%PSF
OOD
J
R7
A
RS1P
oOo
J
R13,
R14
A
RS2P
oOOV
R15
RD%PS
OO0
J
R16,
R129,
R130
A
ACN-039
R131—R134
(ACN-030)
ACT-118
VR2
Variable
(BALANCE)
ACT-117
VR3,
VR4_
Variable
(BASS,
TREBLE)
SEMICONDUCTORS
Part
No.
Symbol
&
Description
2SC1626
Q1,Q2
2801318
Q3
2SA798
Q101,
Q102
2801919
Q103,
Q104
(2SC1400)
28C1438
Q105,
Q106
*2SC1735-C Q107, Q108
(2SC1735-D)
*2SA850-C Q109, Q110
(2SA850-D)
*hfe
of
Q107
—
Q110
should
have
the
same
value.
*2SD883A-0 Q111, Q112
(2SD883A-R)
*2SB773A-0 Q113, Q114
(2SB773A-R)
*hfe
of
Q111
—Q114
shouid
have
the
same
value.
A\ GP-20D D1—D4
10E2 D5—D7
{SIBO1-02)
EQA01-35R D8
1S$2076 D9, D101-D104
(181555)
(1S2473)
181555 D11,D12
(182473)
MZ-157 D10
(WZ-157)
STV3H-Y 0105, D106
21

SWITCHES
Part No. Symbol & Description
ASE-1190 S1 Slide rotaly (FUNCTION)
(ASE-101)
ASK-156 $2, $3 Lever (TAPE MONITOR
1,2)
ASK-155 Ss Lever (SUBSONIC)
OTHERS
Part No. Symbol & Description
AKB-063 Terminal (TAPE)
AEC-288 Insulator wafer
AKH-008 Insulator spacer
ABA-187 Screw 2.5x8
ABA-066 Screw 3x8
ABE-052 Insulator washer
ABA-234 Screw 3x12
ABE-046 Washer M3
Indicator Assembly (AWV-004)
CAPACITORS
Part No.
CEANL OR1M 50
CEA 101P 16
CEA R47P 50
CQMA 332K 50
CKDYF 4732 50
Note:
RESISTORS
Part No.
RD%PMF OOO J
RD%PM O00 J
ACP-078
SEMICONDUCTORS
Part No.
TA7318P-A
HA12010
OTHERS
Part No.
Symbol & Description
C1,C2
C3
C4
C5, C6
C7--C9
When ordering resistors, convert the
resistance value into code form, and
then rewrite the part no. as before.
Symbol & Description
Ri
R2—R4
VR1, VR2
Symbol & Description
a1
Q2, Q3
Symbol & Description
AAV-004
A ATT-577
22
v1 Fluorescent indicator tube
T1 Heater transformer
Volume Assembly (GWX-323)
CAPACITORS
Part No.
CCDSL 121K 50
COMA 183K 50
Note:
RESISTORS
Part No.
RD“%PM OOO J
OTHERS
Part No.
ACV-184
ASK-155
Symbol & Description
C301, C302
C303, C304
When ordering resistors, convert the
resistance value into code form, and
then rewrite the part no. as before.
Symbol & Description
R301—R304
Symbol & Description
VR1 Variable (VOLUME)
S4 Lever (LOUDNESS)
Headphone Assembly (GWX-324)
Note:
RESISTORS
Part No.
RD%PS 000 J
RD%PS OOO J
AKN-023
When ordering resistors, convert the
resistance value into code form, and
then rewrite the part no. as before.
Description
R401, R402
R403, R404
Phones jack (PHONES)
Fuse Assembly (GWX-332)
Part No.
ACG-017
(ACG-003)
Symbol & Description
C501 Ceramic capacitor
ow
o4N