Sanyo JA 300 User manual

SERVICE MANUAL
POWER AMPLIFIER
TA
300
(EUROPE)
SPECIFICATIONS
NOTE:
,
The
below
mentioned
specifications
are
mainly
based
on
the
[HF measurements
standard.
They
can
therefore
not
directly be compared with specifications based on the DIN standard or ther standards.
Continous output power ....... 25Wx 2 (at 8.ohms, Graphic equalizer controls ........ +10 dB (63/250/1000/
0.3% distortion) 4000/16000 Hz)
Total harmonic distortion ...... 0.1% (20 W output, High filter response ......,....... 7 kHz (—6 dB/oct.)
8 ohms) Loudness control response
Input sensitivity and impedance WORZTOKH? cacanecscesasd +8 dB/+4 dB
PHONO os cckaee ean ads 2.5 mV/47 kohms Signal to noise ratio ............ 90 dB |
AUX/TUNER/TAPE PLAY ... 150mV/47 kohms Power requirements ..:......... AC: 220V, 50Hz
Phono overload ifevel .......... 130 mV RMS (at 1kHz) Powerconsumption ............ 130 W
Output level AC output socket ............5. AC: 18 V, 300 mA
_TAPE.REC ...........;. 150mV Dimensions (Approx.) ........... 420 (W) x 220 (D) x
Frequency response ...... ~«e. 20—20000 Hz. 85 (H) mm
| (16-1/2” x 8-5/8" x3-3/8”’)
Weight (Approx.) .............. 4 kg (9 Ibs.)
* Specifications subject to change without notice.
WM-8507

DISMOUNTING
OF
CABINET
AND
FRONT
PANEL
Perform
disassembly
of
amplifier
after
removing
the
power
supply
cord
with
out
fail.
@
Revove
parts
in
order
of
disassembly
as
numdered.
1.
TO
DISMOUNT
CABINET
(4),
Take
out
total
4
screws
(Binding
head
tapping
4
x
8mm
1)
from
cabinet.
|
(2).
Take
out
1
screw
(Binding
head
tapping
3
x
6mm
2
)
from
cabinet.
2.
TODISMOUNT
FRONT
—
PANEL
(1).
Remove
volume
control
knob
and
function
select
knob.
—
(2).
Take
out
total
6
screws
(Binding
head
tapping
3
x
12mm
6)
from
front
panel.

ADJUSTMENT OF BIAS
ii CONDITIONS
VOLUME KNOB : “Q” (Minimum)
GRAPHIC EQUALIZER KNOB - : “0” (Center)
BALANCE KNOB : “OQ” (Center)
FUNCTION KNOB : “aux”
MONITOR BUTTON ; “source”
Hi — FILTER BUTTON : “ott”
LOUDNESS BUTTON : ott:
SPEAKER BUTTON : “on”
Note : No-Input @ No-Load
R758
R858
a.
O;
To
DC
Volt
Meter
7
To
DC
Voit
Meter
SVR701
(L-ch)
SVR 801
(R-ch)
MAIN AMP PCB
After the power switch is turned on, adjust SVR701 and SVR801 respectively as follows.
L — Channel : SVR701 for 3mV+0.5mV reading beteen the both leads of R758.
R — Channel : SVR801 for 3mV+0.5mV reading beteen the both leads of R858.

EXPLODED VIEW __

PARTS
LIST
PARTS
LIST
PACKING
&
ACCESSORY
PHONO
AMP
C.
C.
B.
ASS’'Y
GRAPHIC
EQUALIZER
AMP
P.
C.
B.
ASS'Y
MAIN
AMP
P.C.B.
ASS‘Y
141-4-250T-61671 | P.C.B. Ass’y, Phono Amp
141-6-133T-38
802
|
Individual
Carton
1
71
| )
1
76
141-4-250T-62102
|
P.C.B.
Ass’y,
Graphic
1
77
141-4-250T-62273
|
P.C.B.
Ass’y,
Main
Amp
PCB
1
141-6-144T-85000
|
Foam
Plastic
Case
2
4-240T-06900
|
Socket,
4p
RCA
1
Equalizer
Amp
P.C.B.
,
4-240T-11276
|
Socket,
9p
1
141-6-331T-11
600
|
Protector
Sheet
1
4-240T-07000
|
Socket,6p
RCA
1
Q709,809
Transistor
2SA1016
2
—
'1441-2-381T-04200
|
Bracket
Fuse
4
141-6-231T-35600
|
Inner
Polye
Cover
1
1C701
|
IC
LA6458SS
1
Q710,711,
Transistor
2SC2362
4
SVR701,801
4-222T-73573
|
Semi-Variabie
Resistor
1K
ohm
2
141-6-410T-81
802
|
Instruction
Manual
1
CAPACITORS
.
810,811
:
701,801
4-265T-07930
|
VHF
Coil
2
141-6-415T-32
300
|
Notic,
FTZ
1
C704
,804
Electrolytic
4.7uF
25V
2
Q706,806
Transistor
2SAGO8K
2
4-240T-11200
|
Socket,
3p
1
C713,813
Electrolytic
1uF
(Nonpolar)
50V,
2
Q701,702,
Transistor
2SC536
AUD
SP
5
Q714,814
Transistor
2SC3179
2
C710,711
Electrolytic
220uF
25V
2
703,704,
Q715,815
Transistor
2SA1262
2
C707
807
Electrolytic
22uF
10V
2
705
Q712,812
Transistor
2SC2274K
2
C708,808
Mylar
0.018uF
15%
SOV
|
2
Q801,802,
Transistor
2SC536
AUD
SP
5
Q713,813
Transistor
2SA984K
2
C709,899
Mylar
0.0047uF
+15%
SOV
|
2
803,804,
|
Q716,816
Transistor
2SD612
2
CABINET
C712,812
Mylar
0.0039uF
+10%
50V
|
2
305
|
0707,807
Diode
DS442
X
2
C706,806
Mylar
0.0015uF
#+10%
50V
2
Q707,708,
Transistor
2SA999
NF
4
D901
,902
Diode
DS135
D
4
1
141-0-122T-46500
|
Front
Panel
Ass’y
C705,805
Ceramic
220pF
+10%
50V
2
807,808
903
904
2
141-0-111T-54901
|
Cabinet
Ass’'y
C702,703,
Ceramic
0.01uF
+80—20%
3
D703,801,
Diode
DS442X
4
D906
Diode
DS135D
1
3
141-2-163T-91
900
|
Rotary
Knob
701
50V
802,803
4
141-2-163T-81
730
|
Rotary
Knob
C717,718
Ceramic
0.01yF
+10%
50V
2
D708
Zener
Diode
GZA15Y
1
CAPACITORS
7
5
141-2-164T-30700
|
Slide
Knob
C001
,002,
Ceramic
220pF
+10%
50V
6
;
.
C903,904
4-163T-10100
|
Electrolytic
3300ynF
35V
2
6
141-2-160T-09700
|
Push
Button
003,004,
CAPACITORS
C907
908
Electrolytic
220uF
35V
2
7
141-2-160T-16500
|
Push
Button,
Power
SW
005,006
C909
Electrolytic
220uF
16V
1
C906
Electrolytic
220uF
25V
1
8
141-2-174T-11200
|
Stand
RESISTORS
|
C733,833
Electrolytic
10QuF
16V
2
C739
839
Electrolytic
1uF
(Nonpolar)
504
2
All
Resi
eae
+5%
%W.
unl
C730,830
Electrolytic
10uF
16V
2
C902
4-2237-13771
|
Capacitor
0.022uF
+£20%
200V|
1
|
esistors
are
Carbon
|
-type
to
AW,
unless
C732,832
Electrolytic
4.7uF
25V
2
C738
,838
Mylar
0.047yF
+10%
50V|
2
otherwise
noted.
|
C721,821
Mylar
0.15uF
+10%
50V|
2
C910,911
Mylar
0.1uF
+20%
100V/
2
CHASSIS
R703,803
330
ohm
2
C723,823
Mylar
0.33uF
~
+10%
50V|
2
|
{C912
Ceramic
0.1uF
_+10%
50V|
1
|
R706,806
560
ohm
2
C725,825
Mylar
0.0082uF
+10%
50V|
2
|
|C735,835
Ceramic
47pF
+10%
50V}
2
441-2-311T-43800
|
Chassis
4
|
|
R707,
801
1.5K
ohm
2
C727
827
Mylar
0.0018uF
+10%
50V|
2
|
|C743,744,
Ceramic
2200F
+10%
50V|
4
141-2-125T-29600
|
Bottom
Lid
1
R705
,805
15K
ohm
2
C729,829
3
Mylar
470pF
+10%
50V|
2
843,844
|
141-2-126T-41302
|
Back
Lid
1
R702
802
47
ohm
2
C734,
834
Mylar
470pF
+10%
50V|
2
|
|
C903
Ceramic
0.1uF
+80—20%
50V/
1
141-2-310T-68400
|
Bracket,
Heat
Sink,
Right
1
R707
,807
100K
ohm
2
C737,837
Mylar
0.01uF
+10%
50V|
2
141-2-310T-68500
|
Bracket,
Heat
Sink,
Left
1
R704,804
270K
ohm
2
C731,831
Ceramic
220pF
+10%
50V!
2
RESISTORS
141-2-143T-92601
|
Marking
Plate
1
R700
10
ohm
1
C742,842
Ceramic
3pF
+10%
50V
2
Alli
Resistors
are
Carbon
T-type
5%,
“W
unless
141-2-329T-08700
|
Reflector
1
R001
,002,
1K
ohm
6
C913
Mylar.470pF
+10%
50V
|
1
otherwise
noted.
141-2-464T-14400
|
Fixer,
AC
Cord
1
003,004,
RESISTORS
R758,759,
Metal
0.33
ohm
P-type
1W
4
141-2-310T-69700
|
Bracket
1
005,006
All
Resistors
are
Carbon
T-type
+5%
%W,
unless
858,859
,
141-2-135T-86702
|
Cover
1
otherwise
noted.
R760
860
FP-Carbon
5.6
ohm
P-type
AW
2
141-2-464T-40500
|
Fixer
1
FUNCTION
SWITCH
P.
C.
B.
ASS‘Y
R752
,852
FP-Carbon
390
ohm
P-type
2
R901
FP-Carbon
1
ohm
P-type
1
141-2-464T-29900
|
Fixer
1
R908
FP-Carbon
4.7K
ohm
P-type
1
R757,857
FP-Carbon
82
ohm
P-type
2
141-2-421T-28800
|
Special
Screw
1
141-4-250T-61771
|
P.C.B.
Ass’y,
Function
Switch
1
R749
849
15K
ohm
2
R762,763
FP-Carbon
33
ohm
P-type
2
141-2-464T-20600
|
Fixer
|
5
4-238T-56000
|
Rotary
Switch
1
'R742,842
330K
ohm
2
R906
Metal
82
ohm
P-type
1W
1
141-2-453T-01701
|
Washer
3
x
10x
Imm
1
R725,726,
150K
ohm
5
R909
Metal
100
ohm
P-type
2W
1
727,728,
R748
848
56K
ohm
2
729
R764
864
100K
ohm
2
SWITCH
P.
C. B.
ASS‘Y
R825
826,
150K
ohm
5
R903,904
2.2K
ohm
2
EIXING
PARTS
:
reg
ee
ae
re
827,828
R775
,875
1.5K
ohm
2
:
—_—
73
141-4-250T-61871
|
P.C.B.
Ass’y,
Switch
1
829
R774
874
3.9K
ohm
2
Y
1
Pan
Hd.
Screw
2
x
4mm
7
$5,6,7
4-238T-56100.
|
Push
Switch
1
R720,721,
56K
ohm
5
R865
3.3K
ohm
1
Y
2
Pan.
Hd:
Tapping
Screw
8
722,723,
R907
Metal
330
ohm
P-type
2W
1
W/Washer
3
x
6mm
CAPACITORS
724
R902,905
FP-Carbon
1.5K
ohm
P-type
2
Y
3
Pan.
Hd.
Tapping
Screw
2
C716,816
Mylar
0.056uF
+10%
50V
|
2
R820,821,
_
56K
ohm
:
5
R761,861
FP-Carbon
10
ohm
P-type
“%W
2
W/Washer
3
x
8mm
C714,814
Mylar
0.0068uF
+10%
50V
2
822,823,
Y
4
Pan.
Hd.
Tapping
Screw
4
C715,815
Ceramic
150pF
410%
50V
,
2
824
;
ee
eon
R730,731,
15K
ohm
5
|
|SPEAKER
SWITCH
P.
C.
B.
ASS’Y
Y
5
Binding
Hd.
Screw
3
x
6mm
8
RESISTORS
732,733,
Y6
Binding
Hd.
Screw
3
x
8mm
6
R710,711,
1M
ohm
4
734
141-4-250T-62373
|
P.C.B.
Ass'y,
Speaker
Switch
Y
7
Binding
Hd.
Tapping
Screw
10
810,811
R830,831,
|
15K
ohm
5
4-238T-49700
|
Switch
3
x
6mm
R712,812
10K
ohm
2
832,833,
Y8
Binding
Hd.
Tapping
Screw
9
R709
809
3.3K
ohm
834
3
x
8mm
R744,745,
10K
ohm
Y9
Binding
Hd.
Tapping
Screw
4
|
844,845
HEADPHONE
P.
C.
B.
ASS‘Y
3
x
10mm
R735,736,
1K
ohm
Y10
Binding
Hd.
Tapping
Screw
6
VOLUME
P.
C.
B.
ASS‘Y
737,738,
141-4-250T-62402
|
P.C.B.
Ass’y,
Headphone
3
x
12mm
=
739
4-240T-29971
Y11
Binding
Hd.
Tapping
Screw
4
74
141-4-250T-61971
|
P.C.B.
Ass’y,
Volume
R835
836,
1K
ohm
FP-Carbon
270
ohm
P-type
“ZW
4x
8mm
VR701,801
4-220T-03400
|
Variable
Resistors
837,838,
|
Y12
Spring
Washer
3
x
10
x
1t
| |
839
Y13
External
Tooth
Lock
Washer
R746,846
1.5K
ohm
2.
:
3x
6.5t
x
0.45t
R747
,847
330
ohm
2
AC
POWER
SWITCH
P.
C.
B.
ASS’Y
GRAPHIC
EQUALIZER
CONTROL
P.
C.
B.
ASS’Y
R750,751,
27
ohm
4
—_—_—___——-
850,851
141-4-250T-62573
|
P.C.B.
Ass’y,
AC
Power
Switch
ELECTRICAL
PARTS
“175
141-4-250T-62071
|
P.C.B.
Ass’y,
Graphic
Equalizer
R733,873
270K
ohm
2
4-238T-30100
|
Switch,
Power
heeneees
Control
R743
843
3.3K
ohm
2
4-223T-12100
|
Capacitor
0.01pF
400V
51
4-300T-GO600
|
Power
Transformer
VR703,704,
4-220T-03500
|
Variable
Resistor
R741,
5.6K
ohm
1
141-4-381T-04200
705,706,707
CAPACITORS
4-243T-84971 | Power Cord
141-2-368T-26100
|
Heat
Sink
4-240T-16571
|
Socket,
TUNER
AC
4-234T-10583
|
Fuse,
T800mA
250V
(F901)
4-234T-10588
|
Fuse,
T2.0A
250V
(F701,801)
141-2-243T-09800
|
Base
441-2-327T-26100
|
Insulator
Electrolytic 1uF 50V
Electrolytic 0.33uF 50V
Mylar 0.082uF +10% SOV
Mylar 0.022uF +10% 50V
Mylar 0.0047uF +10% 50V
C720,820
C722,822
C724,824
C726,826
C728 828
ODN 3 aaa
NNNNN

SCHEMATIC DIAGRAM
|
PHONO
AMP
PCB.
10701
(112)
a
|
MAIN
AMP
PCB.
|
POWER
SWITCH
PCB,
A
A
1GS0¥
:
|
a
ee
F901
|
|
SWITCH
VOLUME
oth
3
Lae
ae
shi
|
jPce.
O18
re
220V
&110V—
ae
;
i
,
°
001
/40V
abel
0.0068
|
220.u/ 25V
C711
4
a
- ReOKCX2
|
’
1 t
R806 (NP)
a
IC 701(2/2)
ROO4 1K LA6458SS PCB.
} weer
ROO3 IK me Pe
a
O Ww)
ROO1 1K C001 220P
LAMP PCB. | }
0906
DS135D
2 R906
82 (1W)
C906
| 22040/ 25V
330 (2W)
LED METER PCB.
10702 tae
ele iG 2V 15.4V O~ ‘a
[ HEADPHONE
PCB. |
L. 90059
S1----POWER SW (ON)
$2----SP SW(ON)
R857
C835 S4 ++ FUNCTION SW
SVR801
R002
1K
—_C002_220P*
IK
t)
(4)
&)
&®
gs
R766
2
ROOG
1K
C006
220P
220
(1/2W)
:
R866
|
|
ROOS
1K
COOS
220P
SLP251B
x5
GRAPHIC
EQULIZER
&
AMP
PCB.
C730
tow
SSASGSEL
See eet
SPEAKER
|
TERMINAL
Pe
dd
PCB
Q701~ 705
ek
K
)Q712
1
2SC536G
SP
1
Y
@
4
1
Q701
:
Q703
Q704
‘se
fe
;
:
>
wn
~
0,33
§
=e
C007
pL
° 3
A
§
3
(1W)
00056
#
)
<a
.
t)
.
4
vi
|
270K
Q711
ames
9
=
sare
5
TT
F
c727
|
5
C729
|
|
pots
ONO
lasv
Grav
atl
aw
<
Aope
.
=
Toooe!
“|
|
Tooow
|
“|
|
Tap
ar
~31.2V
abs
Lees
|
|
"C7361
Q710.711
XOs
Cs)
~|
“oa
1
|
470P
12SC2362G
S
3
ai
1d
ty
Oss
R764
|
©)
:
SR
SRLS
R752
ot
2]
100K
O
10K
10K
390
e
°
008
|
2
mee'y
LI
|
pe
Fe
5
C010
{
t
C822,
C826
te] Lyon.
R837 R838
R827 R832 <—R828
(AUX)
R858 =
S5--+» TAPE MON SW
q
a
(SOURCE )
S6-+++ LOUDNESS SW
{
§
oe PP i Q71i2, 2SC2274EK
Q713. 2SA984EK (OFF)
co
Q714
25C3179Y
S7-+++HIGH
FILTER
SW
6
Q715
2SA1262Y
(OFF)
eS, ee Q716 2SD612E
Q815
ak

WIRING
DIAGRAM
220V & 110V
TAPE TAPE QBi4 Q8i6 Qsis | Q715 Q716 Q714 50Hz
PHONO TUNE R
L
R
L
R
L
R
L
R
L
R
TO
TUNER
AC
I18V
PHONO AMP PCB.
SWITCH PCB.
FUNCTION
SWITCH PCB.
SPEAKER TERMINAL PCB.
LAMP PCB
: HEADPHONE PCB,
VR701 »
VR801
SPEAKER SWITCH PCB.
~ HEADPHONE
‘ad
‘ia
VOLUME PCB.
LED
METER
PCB.
BALANCE
PCB.
GRAPHIC EQUALIZER CONTROL PCB
POWER SWITCH PCB.
Q701~ 705]...
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Q706.806 «-+++- 2SA608
Q707.708
steer HD aee
Q709.809 «+--+ 2SA1016
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Q712. B12 «++ +++ #6 2SC2274
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PARTS LIST
LAMP P. C. B. ASS’Y
141-4-250T 62673 | P.C.B. Ass’y, Lamp
4612T-17400 | Lamp 12V, 100mA
SPEAKER TERMINAL P. C. B. ASS’Y
141-4-250T-62773 | P.C.B. Ass’ y, Speaker Terminal
4.237T-1107%3 | Terminal Board
Mylar 0.0056uF +10% 50V
IC
BLOCK
DIAGRAM
-
LA
6458S
(Dual
Operation
Amplifier)
BA6124
(LED
Level
Meter)
vec
C007 ,008
009, (010
LED METER P.C. 8B. ASS’Y
141-4-250T-64571 | P.C.B. Ass’y, LED Meter
IC LB1403 oe
IC BA6124
LED SLP251B Green
Electrolytic 10uF 16V
Carbon 10K ohm T-type %W
BALANCE P. C. B. ASS'Y
141-4-250T-64671| P.C.B. Ass’y, Balance
4-220T-03600 | Variable Resistor
Carbon 1K ohm T-type “%W
Carbon 1K ohm P-type “W
a a a a
eS ) J) ) ) Constant
7 Re oe ee ue
Vcc
SANYO ELECTRIC TRADING CO., LTD.
33,-Hiyoshi-cho 2-chome, Moriguchi-shi,
Osaka-fu, 570 Japan.
-8- a | mea: ee Aug./’82/2000 KM Printed in Japan.