Sansui AU-7700 User manual

SERVICE MUAL
STEREO AMPLIFIER
$ll$ul [u-7700
*
SANSTJI E.LE,CTRIC CO., LTD.

GAU -r7oo
This service manual is designed for service engineers to repair, arCjust,
maintain and order the replacement parts of the A tJ-7700 correctly.
When ordering the parts, use the stock numder and parts name speci-
fically referring to the Parts Locations & parts Lists.
For Seneral usage and maintenance of the unit, please refer to the
operating lnstructions attached with the unit.
TABLE OF CONTENTS
y
Y
Section Title
1. SPECIFICATIONS
2. BLOCK DIAGRAM AND VALU; öF EÀCH LEVEL . :
3. ADJUSTMENT :
3-1. Driver Circu it Board Ad justment
4. TROUBLESHOOTING CHART .
4-1. Troubleshooting on power supplys..t,or. . . . . . .. .
4-2- Troubleshooting on Audio section
5. PARTS LOGATIONS AND PARTS LISTS
5-1- F-2092 Eqralizer & power supply circuit Board
5'2. F'2095 Tone Control circuit Board
5-3. F-209G Accessory switch Circuit Board
5'4. F-2097 Driver & power supply circuit Board
5-5. F-2093 Volume Circuit Board
5-6. F-2094 Access ory switch Circu it Board
5-7. Other parts (Front Side)
5-8. Other parrs (Top Side)
5-9. Other parrs (Bortom Side)
6. REPLACEMENT OF POWER TRANSISTORS .
7. PACKING LIST
8. ACCESSORY PARTS LIST
9. SCHEMATIC DIAGRAM
P age
.2
.3
.4
.4
.5
.5
5,6
.7
7,8
.9
10
TL, L2
13
13
L3, L4
15
16
T7
l7
L7
18
V
Y
V

1. SPECIFICATIONS
POWER OUTPUT (at rated distortion)
CONTINUOUS RMS POWER OUTPUT
:... ..54 Watts per channel x2
(both channels driven)
LOAD IMPEDANCE ..BC)
POWER BAND . .20 to 20,000H2
TOTAL HARMONIC DISTORTION
Music poweri,rr, : : i:.1: :l;rï? ::r,5::"-ï AUX)
140W (8o t,000Hz)
Continuous rms power output . .55+55W (go t,000Hz)
INTERMODULATIoN DISTORTIoN (ar rared power
output 70H z: 7 ,000H2-4: 1 SMPTE method)
OVERALL... ...less than 0.15%
PREAMPLIFIER ONLY . less than 0.1 %
POWER (MAtN) AMPLtFtER ONLY
F R Ee u E NCY R ESPoNS E r uil;'il|; "
"'"lr'ru
OVERALL... ...10to 50,000H2 1?uag
POWER (MAtN) AMPLIFTER ONLY
EeuALIZArtoN rnlnn .r;i";o 50'000H2 l?as
DAM'TNC FAcróR .. . i3 1il5'000H2 +0 sdB
INPUT SENSITIVITY AND INPEDANCE
(1kH z, f or rated power output)
PHONO-1 2.5mV 30kC), 50k dl,100kc)
ad justab le
PHONO-2 2.5mV 50kO
(Max. input capability: 300mV at 0.2% total
harmonic distortion)
TUNER . .100mV 50kC)
AUX-1 & -2 . .100mV 50kC)
TAPE DECK-1 & -2 (Pin jacks)..100mV 50kC)
TAPE DECK-1 (DlN Socket) . . .100mV 50kC)
MAIN IN B00mV 50kO
OUTPUT LEVEL (1kHz)
TAPE DECK-1 & -2 (Pin Jacks). .100mV
TAPE DECK-1 (DIN Socket) . . .30mV
PRE OUT B00mV
(Max. output level: 5V at 0.5% total harmonic
d istortion)
CROSSTALK (1kHz, for rated power output)
PHONO-1 & -2 better than 50dB
TUNER better than 50dB
AUX-1 & -2 better than 55dB
TAPE DECK-1 & -2 . . better than 55dB
MAIN lN . . better than 60dB
HUM AND NOISE (tHF)
PHONO-1 & -2 better than 75dB
TUNER . : .better than BsdB
AUX-1 & -2 better than BsdB
TAPE DECK-1 & -2 . . better than B5dB
MAIN lN . . better than 't00dB
SWITCHES AND CONTROLS
BASS (Í5 sreps) t13dB ar 50Hz
TONE SELECTOR (TURNOVER FREQUENCIES)
MT DRANCE (.,,i"o;; Ï5;',1','-ï; 6ooHz
TREBLE (+5 steps). . +13d8 at'l5kHz
TONE SELECTOR (TURNOVER FREQUENCIES)
LouDNESS (votum" coni ,lrl,n:'r1:ïz' BkHz
LOW BOOST . . +10d8 at 50Hz
HICH & LOW BOOST . . +1OdB At 5OHZ
I BdB at 10kHz
Y
LOW FILTER
HICH FILTER
MUTINC
OTHERS
TRANS ISTORS
DIODES
ZENER DIODES
LED
POWER REQUIREMENTS .
POWER CONSUMPTION
DIMENSIONS
WEICHT
. - 3dB at 20H z (12dBloct.)
- 3d B at 60H z (12d B/oct.)
. - 3dB at TkHz (6dB/oct.)
- 3dB at 12kïz (12dBloct.)
. -30d8, -15d8
.57
.22
.3
.1
.100, 117 , 220, 240V, 50160ïz
.120W (rated), 350W (max.)
.434m m (17 %o) W
130mm (5%") H
315 m m (1 2%6') D
.123kg (27.1 Ibs) Net,
1a.0kg (30.9 lbs) Packed
* Design and specification subject to change without notice for
improvements.
2

HAU -77oo
2. BLOCK DIAGRAM AND VALUE OF EACH LEVEL U
rN
N
ry
LL
-aO
<tts
Zr=
r.rdO
*Ét u
0-; §i
+
O
a
E
3
(J
É,
o
+
(J
F
=
o
É,
o
q
at
ld
íJ
ÍJ
,-l
t-=l
l*r-l
1- EE r-
E_l
B
rÏ1 a
a
m
É.
o
F
O
LtJ
J
UJ
À @err *s
Or--- *OIOOO
Ri+ë 6Ras:
rL ; ^; d; F L._.i §: aj
.IJ
?
(s
m
o
a
z
g
è
5e
\H v
Y
V
r-l ;
f,i
(Jl
GI
(Jl
}I
Ài
Àl
fl
.tl
cl
lrl i
=l
8l
.r!
al
lrlI
ÏE
É[E
a^
ts/r+\
'{-}-
I
__l
Condition of Level Measuring
*Value of each level in block d iagram was
measured bY the followings.
"1. MASTER VOLUME control . . Maxim u m
2. BASS, MIDRANCE, TREBLE &
BALANCE volu me controls Center
3. TONE & FILTER switch controls ..
TONE & FILTER
4. lnput PHONO-1,2 2mV lkHz Sine
Wave
AUX-'l, 2 90mV lk{z Sine
Wave
(output impedance of 600o
at an aud io osci I lator)
s. Output . .20V (50W) BO
Note: Each voltage value is for reference and
measured by a VTVM. In some recorders, the
actual voltage value is in minor difference
from the reference value.
=iltlgi
gll?l
:int
EI
Ei fi
ul I
2ll
Pi;l I
isi
llLl
FIJ--
P=--
6lÍtJ BAL
Ëi§i-r
9u+
Er--t
=l I
Ël le
-l lU
(Jl I
-i I
ol L-
tl .{
=l 6
oi
> l--
filËl Ë
rd iNi
HLL _

3. ADJUSTMENT
3-'l . Driver Circuit Board Adirstment
Note: 1. Conf irm the AC power supply voltage.
2. MASTER VOLUME ... ...Minimum
3. SPEAKERS Selector... ...A
4. Make the SP terminals free (no load).
(See tig. 3-1 , 3-2 and 3-3)
5. For adjustment, run the unit for more than 3 minutes
after the power is switched ON.
6. Room temperature should be 1B-2B.C (65-83'F)
for bias current adjustment.
STEP SUB'ECT EQUIPMENT MEASURE OUTPUT ADIUST ADIUST FOR CONDITION
1 I DC 0V L-ch i OC volr merer I Sp terminal L-ch
I I | {s"" Fis. 3-3)
2 I oC 0V R-ch I Sume as above I sp rerm inat R-ch
I I I (see Fig. 3-3)
The unit installing quick acting fuses
3-1 i P'l: currenr I ,a miiliammeter I
Ir-cn I I
4-1 igiurcurrent lSameasabove I
j n-crr i i
XThe unit not installing quick acting fuses
3'2 I f::i curren, I DC m ittiam merer i
F-2097
F-2097 t02
Between a red wire
& plus side of C602
on F-2416
(See Fig. 3-2)
Between other red
wire & plus side of
C602 on F-2416
(See Fig. 3-2)
F01
4-2 | Bias current I Same as above
ln-.n I
F-2097
VROl
t-2097
VRO2
t-2097
VRO3
t-2097
VRO4
t-2097
VRO3
t-2097
VRO4
0V +10mV
Same as above
45 + 10mA
Same as above
45 +'10mA
Same as above
oïurn volumes of VR03, VR04
CCW
.Step down meter's range
accord ingly
"Step down meter's range
accordingly
:ii Bias current adjustment on the unit not installing quick acting
fuses.
t) Disconnect a red wire (plus side) from C6OZ on F-2416 which
goes to driver & power supply circuit board, F-2097, then con- g)
flrm that collector voltage +41V of power transistor, TR23 (L-:h)
or TR24 (R-ch) on F-2097 is not supplied.
F ig. 3-'l
Fig. 3-2
Adjust vR03 (L-ch) or vR04 (R-ch) so that bias current on one
channel at the disconnected points between A and B (see Fie. 3-2)
is 45 + 10mA.
After connecting the red wire again, adjust it on another channel
as same as steps 1) and 2).
2)
v
(L) (R)
F-2097
SPEAKER TERMINAL
volt meter O
lliammeterQ milliammeter@ 4

GAU -r7oo
4. TROU BLESHOOTI NG CHART
4-1. Troubleshooting on Power Supply
Symptom Check Point
1. No power supplied to each section
1-1. lndicator lamp for power not lighted
Section
1-2. lndicator
4-2. Troubleshooting on Audio Section
"1 . Rel ày, RL01 inoperative
(protector circu it inoperative)
2. Bias current not adiustable to *45mA by VR03
(L-ch) or VR04 (R-ch) on t-2097
Center Voltage not adiustable
(L-ch) or VR02 (R-ch) on F-2097 to 0V by VR01
Cause & What to Do
Power supply cord open
lmperfect contact of power switch,5701
Power f use, F701 open
Defective power transformer, T701
F07 on t-2097 open
Defective D21 on F'2097
lmperfect contact of voltage selector,
PUOl
F05 or F07 on F2097 open
Defective D17 or D19 on t-2097
Defective power transformer, T701
F01 (or F03) on t-2092 open
Defective D01, D03, D07 or D09 on
t-2092
Defective TR09, TR11, TR13 or TR15 on
t-2092
F07 on F-2097 open
Defective D21 on t-2097
Defective D13, D'I5 or D25 on t'2097
Defective TR29, TR31 or TR33 on F-2097
Defective reluy, RL01 on F-2097
Defective TR21 or TR23 (TR22 or TR24)
o n F '2097
Defective TR25 or TR27 (TR26 or TR2B)
on t-2097
Defective TR05 or TR07 (TR06 or TR0B)
o n t'2097
Defective VR03 (VR04) on F'2097
Defective TR05 (TR06) on F-2097
Defective VR01 (VR02) on F'2097
lamp for power Iighted
+41Y not supplied to collector
trans istors (+ 41V , TR21 ,-TR24,
1.
2.
3.
4.
5.
6.
7.
B
1) on each power
- 41V , TR25 -
TR2B)
2) +24V not supplied to terminal
not supplied to terminal tr on@ and -2sV
F-2092
L_;
10.
11.
12.
13.
V,
\t
3. 10
L-;;
1.
2.
3.
5

fl
r
L/
' Symptom
4. TUNER or AUX input
4-1. Both channels inoperative
4-2. One channel inoperative
* SEt MODE SWitCh tO REVERSE
5. PHONO inoperative
5-1. Both channels inoperative
5-2. One channel inoperative
* Set MODE switch to REVERSE
tl) lnoperative channel reverses
* Set TONE & FILTER switch to DEFEAT
2-1) The inoperative channel becomes
operating
2-2) The inoperative channel is still not
operating
Cause & What to Do
a
lmperfect contact of speakers switch,
S7O2a, c (S702b, d)
Defective Power Supply Section
Tuner connected from this set has faulty
lmperfect contact of SELECTOR switch,
S01c (S01d)
lmperfect contact of TAPE PLAY switch,
S02a (S02b)
. Defective TR09 or TR11 (TR10 or TR12)
on F-2095
. lmperfect contact of LOW FILTER switch,
S04a, c (SOab, d)
. Defective TR01 (TR02) on F-2096
Defective TR01, TR03, TR05 or TR07
(TR02, TR04, TR06 or TR0B) on F-2095
lmperfect contact of PRE-MAIN switch,
S04a (S04b)
Defective Driver & Power Supply Circuit
Board
Refer to4-1. of 4. Both channels
inoperative
Turntable connected from th is set has
fau lty
lmperfect contact of SELECTOR switch,
S01a (S01b)
Defective TR01, TR03, TR05 or TR07
(TR02, TR04, TRO6 or TROB) o n F-2092
Refer to4-2. of q. One channel
inoperative
Check Point
inoperative
l-r) lnoperative channel reverse
I
I
I
L-21 lnoperative channel not reverses
{;
Ë,
Y
1.
2) Inoperative channel not reverses 5.
6

G.AU-t7oo
5. PARTS LOCATIONS AND PARTS LISTS
5-1. F-2092 Equalizer & Power Supply Circuit Board Y,
(Stock No. 7550580 Complete Circuit Board t-2092)
Conductor Side
+
^"rÏ
+H
REPLACE WITH
SAME TYPE FUSES 2
,srd.Í fsJiin
Hry
pe1mmk

Parts List Parts List
v
'Y
V
v
Parts No. Stock No. Description Parts No. Stock No. Description
Position Position
TRor, oz 0306A71,2
TRos, o+ 030ó071,2
TRos, oo 0300470, 1
TRoz, oe 0306070-2
TRoq 0303280-2
TRr r 0306070-2
TRrs 0308450-2
TRis 0300470,1
Dor
Dos
Doz
Doq
Drr
2SC1sl3G)(c,H) )
2SCl3l3@(C,n) I
25A726 @) (F, G) I
2SCl3l3 @ (F, G, H) [___- :
2sLs26(c, o, E) ' itronsistor
2SCI3l3'D (r, O, H) |
2sD356 (C, D, E) |
25A726 @) (F, G) )
031 0340 r 0D-l
03r 0340 I 0D-l
03r 0340 I 0D-l
031 0340 I 0D-l
03r ó3r 0 Ror 3E(
Diode
B) Zener Diode
3B
3B
3B
3B
2B
IB
2B
IB
IB
IB
IB
IB
IB
2B
2B
2B
2B
2B
2B
2B
2B
IB
IB
IB
IB
IB
IB
IB
IA,
IB
2B
3A
3A
3A
3B
3B
3B
3B
3B
3B
3B
3B
3B
3B
3B
3B
2A
2A
IB
1B
2B
IB
1,28
IB
IB
IB
Rsr
Rsg
Rss
Rsz
Rsq
Roo
Ror
Roz
Ros
Re+
Raot, qoz
Sor
Soz
For
Foa
0t03331
01 07 392
0107122
0 r 07330
0t07153
0t07r53
0107 47 4
0107 47 4
0107 47 4
0107474
0107104
330 c)
3.3k c)
t.2ko
33 c)
I 5kc)
I 5ko
47 }ko
47 }ko
47 }ko
47 }k{l
r 00k c)
IB
IA
IB
2B
2B
2B
2B
2A
1,24
l,2A
3B
2,38
IB
1B
I 102550 SRE2-4-5 )
.l ro2sóo snrz-o z i RotorY Switch
1iw c.R.
Fu se
Cor, oz 051 9l 03
Co3, o+ 0óó0330
Cos, oo 05321 00
Coz, o8 066047 O
Cop, io 0ó0082ó
Cr l, rz 0621561
Cr3, r+ 0600276
Crs, ro 0533339
Cv 0515221
C rq 051 41 0l
Czt 051 54 7 O
Czt 066A221
Czs 051 31 00
Czt 05l5l0l
Czs 051 547 0
Csr 051 5470
Cas 0660221
Cgs 0513479
Csot, soz 0ó01 I 07
Csog 051 5339
Cso+, pos 0657223
Csoo, sot 0óó01 0 i
Ror, oz 01 075ó3
Ro3, oa 0107 47 3
Ros, o6 0107224
Roz, oB 01 07 224
Roq, lo 0107152
Rrr, rz 0107822
R 13, l+ 0 107 124
Rrs, ro 0107821
Rrz, le 0107223
Rrp, zo 0107472
R2t, z2 0l 071 01
R2s, z4 0l 075ó3
Rzs, z6 0107 47 4
Rzz, zB 0107273
Rzs, ao 0 107 561
R3t, gz 0107104
Ra3,3+ 0107224
Rss 0l 041 81
Rsz 0107272
Rsp 01 07 821
R+r 0107220
Raa 0107 821
R+s 01073?2
R+z 0107 471
R+q 0107682
0.47 1tF 50V
33pF 50V
10 1tF 1 óV
. 47pF 50V
0.00821tF 50V
5ó0pF 50V
0.0027,rtF 50V
3.3lrF 25Y
220,ttF 50V
l00,uF 35V
47 ,uF 50V
220pt 50V
10 1tF 25V
I 00pF I
47 ltt) sov
a7 1ff)
220pF 50V
4.7 ltt 25V
0.01 aF )
s.s prl 50v
0.022 r ff 1
r oo prj 50v
5óko
47kd)
220ko
220k{l
t.5ko
8.2ko
I 20ko
820C}
22ka
4.7kd}
I 00r)
5óko
47 }kd\
27ka
5ó0c)
r 00ko
220kdl
r 80C)
2.7 k{t
820 C}
22C"
820 C)
3.9k o
470o"
ó.8k O
E.C.
C.C.
E.C.
C.C.
M.C.
P.C.
M.C.
E.C.
E.C.
E.C.
E.C.
C.C.
E.C.
E.C.
C.C.
E.C.
M.C.
C.C.
%w c.R.
0430830
0430830
231 0l 50 Fuse Holder
2430250 Pin Jock
5936691 Heot Sink
rA (20mlm)l
t e (zomlm) J
IW C.R.
C. R. C.R.j : CarbonResistor S.R. : Solid Resistor
Ce.R. : Cement Resistor
M.R. : Metallized Film
R es istor
M.C. : Mylar Capacitor
E.C. : Electrolytic Capacitor
_--Abbreviatielr§--
c.c.
Mi.c.
o.c.
P.C.
T.C.
BP.E.C.: Bi-Polar Electrolytic
Capacitor
Cera m ic capacitor
M ica Capacitor
Oil Capacitor
Polystyrene Capacitor
Tantalum Capacitor
V%w
a

AU-7700
F*fltffi
ffi&fldffi1$Ë
ïtr-Hi Í - ffi#
5-2. t-2095 Tone
Conductor Side COntfOl CifCUit BOafd (stock No. 7s6o82o Complete Circuit Board F-20e5)
Parts List
Parts No. Stock No. Desc ription Position
TRor, oz 030ó070,
TRos, o+ 030ó070,
TRos, oa 0300470,
TRoz, oa 030ó070,
TRop, ro 030ó070,
TRr,t, rz 0300470,
Col, oz 051 9l 03
Cos, o+ 0óó0330
Cos, oo 0660470
Coz, o8 0óó0ó80
Coe, 'ro 0533 I 00
Cn, tz 051 9l 05
C.rs, ra 0óó0.I 00
Cls, ró 0510100
Ctz, 18 0519001
Ctg, zo 0ó01 ó8ó
Czt , zz 060147 6
Czs, z+ 0ó01 ó8ó
Cpo.t, poz 0ó0.I I 07
Cqos 0657'223
Ror, oz 0107222
Rog, o+ 0107 124
Ro5, oó 0106822
Roz, 08 0107 124
Roe, ro 0107223
Rrr, lz 0107472
Rr3, rt 0]07.l04
Rrs, ro 0107222
Rrz, rs 0'l 0ó183
R.ts,20 0l0Z10l
Rzt , zz 0107 824
Rz3, z+ 0l 07.l 54
Rzs, z6 0107123
Rzt , zs 01 07 121
Rzp,30 A107332
Rer,32 0107332
R33, 3+ 0'l 07.I 04
R3s, só 01 071 0l
R3z, 38 0l 071 01
R3p, +o 0107272
Rtt, tz 0107272
Ra3, a+ 0107472
R+s 0107472
R+o 0107 47 2
Raz, [phone]
R+s, so 0107223
R5r, sz 0107222
Rs3, sa 0107822
Rss, só 0107822
VRot, oz l0ó00ó0, I
VRog, o+ I0ó00ó0, I
VRos, oo l0ó00ó0, I
2SCr3t3@(F,G)l
2SCt3l3@(F,G)l
25A726 @) (F, G) t
2SCt3l3 G) (F, G) í
2SCr313 @ (F,G) I
25A726 @) (F, G) )
IB
IB
IB
lronsrsÍor l,28.lB
38.28
3B
0.47 ptF
33pF)
il pr\
óspr ,|
10ytt
2.21tF
I 0pF
10ytt
1A pF
0.00ó8pF1
o.ooa7 prl
o.oo6spF (
o.o1 pr)
0.022 ,tt
sOV E.C.
sOV C.C.
25Y BP.E.C.
5OV E.C.
5OV C.C.
I óV E.C.
25V E.C.
5OV M.C.
sOV C.C.
%w
%w
] A, B
1B
1B
1B
],28. IB
2B
2,38.28
2B
38.2B
24.34
2A
2A
2.2kC)1
1 2oko J
8.2ko
r 20kC) )
22kol
4.7k0 I
I 00kC) Í
2.2ko)
.lskr)
C.R. 1 B
IB
C.R. (r.t.n.) I B
IB
IB
C.R. I B
2B
IB
I 00c)
820ko
I 50ko
I 2ko
I 20C)
3.3ko
3.3ko
I 00ko
r 00C}
I 00c)
2.7ko"
2.7ko
4.7kdl
4.7kdl
4.7k{\
27ko
)4w
1Aw c.R. (E.L.R.) I B
2B
2B
38.28
38.28
2B
2B
38.28
28.28
3A, B. IA
.Àw c.R. 38.28
IA
2A
2A
3A
2A
34, B
3B
38.3A
3A
38.34
2SC1 31 3
2s.A726
22k{\
2.2ko
8.2k c)
8.2ko
soko (s) x z
5ok0 (e) x z
soko (B) x 2
\ VorioUte Resistor
| (ston Typu)
1A
2A
3A
9

V
I
I
5-3. t-2096 Accessory Switch
Conductor Side Cif CU it BOaf d (Stock No. 75e2itr;a Complete Circuit Board F-20e6) Parts List
Parts No. Stock No. Desc ri pt io n
TRol,oz 030ó070, I 2SC 1 S t S@ (F, G) Tronsistor
Pos itio n
Cor, oz 0621821
Cog, oa 0ó0] 1 5ó
Cos, oo 0573228
Coz, oa 0ó0,l ó87
Cop, ro 0601277
Crr, rz 051910.I
Cr3, r+ 051 9l 05
Crs, ró 0601687
C rz, 18 0601227
Ctg, zo 0ó0.l ó8ó
Czt , zz 0ó01 ó8ó
Czs, zt 0601227
Czs, zo 0601687
Czt, 28 0ó01 I 0ó
Czg, so 0ó0 I I 56
Cgr, 3z 060127 6
Ror, oz 0107474
Rog, oa 0107 47 4
Ros, oó 0l 07393
Roz, oa 0107394
Roe, ro UA7274
Rrr, 12 0107274
Rr3, 14 0107 472
Rrs, ro 0107123
Rrz, rs 0107102
Rre,20 0lA7682
Rzt, zz 0l 07,l 01
Rzs, z+ 01 071 05
Rzs, zo 0l 07.l 05
Rzt , zB 0l 07.I 05
Rzp,30 0.l07105
R3r, 3z 0l 071 05
R3s, s+ 0l 071 05
Rgs, 3o 0l 07,l 05
R3z, 38 0l 071 05
Rgp, +o 0l 071 05
Ral, +z 0l 071 05
R+s,++ 0107105
R+s, +6 0l 07.l 04
Sot
Soz
Sos
So+
Sos
r r 70500 slcl 4351
1170490 slcl 4301
117A490 sLcl 4301
1170490 sLcl 4301
1170490 sLcl430l
820 pt
0.0015 pr
0.22 pF
0.0óSpu F \
0.027 pr J
I #Fl
2.2 pF J
0.0ó87tF )
0.0221tF I
0.00ó812F I
0.00óspF I
0.0221,tt )
0.0ó8pF I
0.001 pzF I
o.oo l5ptt I
0.0027 pr )
sOV P.C.
5OV M.C.
25V T.C.
sOV M.C.
5OV E.C.
sOV M.C.
i+w C. R.
Lever Switch
] A, B. IB
2A.28
24.28
I A, B. ] B
I A.1 B
IA, B. IB
1A.I B
1B
3A.38
3A.38
34.38
34.38
34.3B
34.38
1A.I B
I A.I B
I A.I B
24, B, 28
24, B.28
IB
28,24, B
IA
IA
IA.I B
IA.I B
IA.I B
IB
2A.28
24, B.28
24, B,28
3A, B. 38
3A, B. 38
34, B. 38
34, B. 38
34, B. 38
3A, B. 38
IA,B. IB
IB
1A.I B
IB
24, B
3A, B
34, B
24, B
IA, B
47 }ko
47 }ka
3eko
s90ko
27 }ka
27 }kdl
4.7ko"
I 2KC)
I kc)
ó.8ko
1 00C)
tMo
lMo
IMC}
I MC)
I Mf)
tMo
lMo
tMO
tMo
tMo
tMo
I 00ko
C.R. : Carbon Resistor
S.R. : Solid Resistor
Ce.R. : Cement Resistor
M.R. : Metallized Film
Resistor
M.C. : Mylar Capacitor
E.C. : Electrolytic Capacitor
c.c.
Mi.c.
o.c.
P.C.
T.C.
BP.E.G.: Bi-Polar Electrolytic
Capacitor
Ceram ic capacitor
M ica Capacitor
Oil Capacitor
Polystyrene Capacitor
Tantalum Capacitor
to

tAUt-t7oo
5-4. F-2097 Driver & POwer SUpply CirCuit Boafd (stock No. 7s7os1o Comptete circuit Board F-20e7)
Conductor Side 2S^126 2SC735 2SA606
2SC71 1 2S4662 2SC959
2SCl 384
2SA733
2SC945
,"tÀ
+H
v
+
ö+
ffiFïl
ffiHH
c

Parts List
Parts No. Stock No. Desc ri ption Position Desc ription Position
Parts No. Stock No.
?
y
Y
TRor, oz 0300470, I
TRos, o+ 0300470, I
TRos, oo 0305900, I
TRoz, oa 0305731-3
TRop, ro 03057 42, 3
TRr r, rz 0305ó40, I
TRrs, r+ 0300212, 3
TRrs, ro 0300220, 1
TRrz, re 0308441 ,2
TRrp, zo 0303271 , 2
TRzt, zz 030ól 90-3
TRzt, zt 030ól 9O-3
TRzs, zo 0300ó30-3
TRzt, za 0300ó30-3
TRzp 030ól 30-2
TRsr 0300510-2
TRss 0305950-2
Dor, oz 0340090
Dos, oa 0340090
Dos, oó 031 ó230
Doz, oB 031 'l 050
Dop, ro 0311050
Dr r" 031 0340
Drs 031 I 050
Drs 031 0490
Dv 031I3l0
Drs 031 I 320
Dzt 031 0340
Dzs 03.l 033.|
Dzs 0340090
Dzt 031033]
Dza 0310031
TSor 03201 I 0
Cot, oz 051 9l 05
Co3, o+ 0660470
Cos, oó 051 5l 0l
Coz, oB 051 5470
Cos, to 0530470
C.tr, rz 05l5l0l
C.rs, ra 0515109
Crs, ró 0óó01 00
Crz, r8 06ó01 00
Cts, 20 0660220
C2t , z2 0ó0.l ó87
Czs 051 0471
Czs 0531101
Czt 051 5330
Cpor 0ó01l0ó
Cpos, po+ 0ó01 107
Ror, oz 0107474
Rog, o+ 0l 071 03
Ros, oó 0l 071 04
Roz, 08 0\07822
Rop, ro 0l 07393
Rrr, rz 0107472
Rrs, r+ 0107220
Rrs, ró 0107220
Rrz, r8 0107821
Rre, zo 0107332
25A726 @ (F, c)
25A726 @ (F, G)
2SC I 124 (1 , 2)
2sc7l I (E, F, G)
2SC959 (t, r)
2SC735 (O, Y)
2SAó0ó (t, r)
2sA562(O, Y)
25D382 (M, L)
258537 (M, L)
2sc1ólg(R,o,Y)
2SCtólg (R, O,Y)
2sAgog (R, o, Y)
2SAg0g (R, O, Y)
25Ct 3ó4 (5, 6,7)
2sA733 (P, Q, R)
2SCg45 (R, Q, P)
28.48
28.48
I B.3B
28.3,48
2B
28.48
I B.3B
I B.3B
Tronsistor 2C.4C
1C.3C
2C,4C
2C.4C
IC.3C
IC.3C
4A
4A
4A
2,34.44,8
2A,B.4A,B
38.48
28.48
] B.3B
4A
4A
4A
2A
3A
3A
4A
4A
4C
28.48
28.48
34.48
28.48
28.48
28.48
2B.4A,B
28.48
I B.3A
I B.3A
3A
4A
4A
3A
3A.4A,B
2A,8.4 A,B
2B .44,8
24,8. 4 B
2A,8.4 A,B
2,38. 4 B
2,28. 4 B
28,48
1,28,48
2A, B. 48
Rzt , zz 01 0347 2
Rzs, zt 0l 031 8l
Rzs,z6 0l 03,l 02
Rzt , zB 0103472
Rzp, so 0l 07390
Rer, s2 0107682
Rss, s+ 0l 071 04
Rss, 3ó 0107 122
Rsz, a8 0l 031 0l
Rgp, +o 0l 03,l 02
Rq, tz 0l 031 02
R+s, a+ 0l 071 83
Ras, +ó 0l 071 83
Raz, +8 0l 031 0l
R+p, so 0l 031 0l
Rsr, sz 0l 031 00
Rss, s+ 0l 031 00
Rss, só 0l 03.l 00
Rsz, s8 0l 031 00
Rss, óo 0107102
Ror, oz 0l07 471
Ro3, o+ 0107 471
Rós, óo 0107102
Roz, ea 0l 33478
Róe, zo 0133478
Rtt, tz 0l 33478
Rt3,7q 0l 33478
Rzs 0104479
Rza 0104479
Rtt 0105100
Rza 0105100
Rtg 0l 041 8l
Rar 0l 07 823
Ras 0107823
Rss 0l 071 04
Raz 0107 473
Ras 0l 03ó82
Rpr 0l 03ó82
Rps 0105182
Rps 0105182
Rpz 0107221
Rps 01 07223
Rroo, rol 0107102
RLor I I5025r
Lor, oz 4290210
Fos, oz 0430920
VRol , oz I 0351 'l 0
VRog, o+ 1035070
%w c.R.
/4w C.R.
%w c.R.
%w c.R.
l,/zW C.R.
l/+w c.R.
3W Ce.R.
IW C.R.
2w C.R.
IW C.R.
1,4W c.R.
l/zw c.R.
2w C.R.
2w C.R.
1,/4W c.R.
DS-430
DS-430
RD-e.l E(B)
r s953
I S953
IOD-I
r s953
SV.O2
SS-5
SS-5R
t0D-t
1 NóO
DS-43 0
I NóO
I NóO
TS3-85 Thermistor
Diode
sOV E.C.
sOV C.C.
sOV E.C.
ó.3V E.C.
sOV E.C.
5OV C.C.
sOV M.C.
ó.3V E.C.
I OV E.C.
sOV E.C.
sOV M.C.
4.7k0 \
180c) [
rko I
4.7ka )
3er) '|
ó.8kc) l.
I 00kC) r
r.2ko,|
100C) )
]kC) \
rkoJ
I skol
I skclJ
100C)\
r00C) I
roo I
10C) /
r0c) I
roöJ
1kC)\
47oc) ['
47oa (
rkoJ
0.47r}'l
0.47 c) [
0.470 i
0.47 0 )
4.7o1
4.7 at
l ool
r oC)l
I 80C}
82ko )
82ko L
r00ka (
47kC. )
ó.8kC)1
ó.sko J
t.8ko
l.8ko
2200 \
22ko \
rko J
38.48
3A,B.4A,B
2,38.48
28.48
28.48
28.48
28.48
28.38
2A,B.3AB
2B .4 B
I B.3B
28.48
I B.3B
28.48
I B.3B
28.48
18.38
28.48
I B.3B
28.48
28.48
I B.3B
I B.3B
28.48
1,2 B. 38
28.48
I B.3B
3A
3A
3A
3A
4A
4A
3A
4A
4A
2A
3A
3,4 A
4A
4A
4A
IB
24.34
2A
2B .3,48
2.21tt
49pF
I 00p Fl
sttrl
47 1tF
l00prF'[
Itfl
I 0pFl
r0pFI
22pFJ
0.068 pr
47 0 1tt
l00ptF
331tF
0.001 pF)
o.ot prJ
RABK-2B Reloy 4 A
2.5ytH Microlnductor 4A, B
7 A (20mlm) Fuse
4.7kO (B) I Semi Voriobte
lkC) (B) J Resistor
470ko
I 0ko
I 00ko
8.2ko
39ko
4.7ko,
22o,
22o,
820r}
3.3ko
23'l 0l 50 Fuse Holder
5937061 Heot Sink
---flbbreviations-
C.R. : Carbon Resistor
S.R. : Solid Resistor
Ge.R. : Cement Resistor
M.R. : Metallized Film
Resistor
M.C. : Mylar Capacitor
E.G. : Electrolytic Capacitor
BP.E.G.: Bi-Polar Electrolytic
Capacitor
c.c.
Mi.G.
o.G.
P.C.
T.C.
Ceram ic capacitor
M ica Capacitor
Oil Capacitor
Polystyrene Capacitor
Tantalum Capacitor
Y
%w c.R.
t2

AU-7700
F*§#ffiffi
ïF.HïI. HM
5-5. F-2093 Volume Circuit Board
Conductor Side
Parts List
510l lól Binding Heod Screw, M4 X ó
5109222 Binding Heod Topping Screw, M3 X 8
5309270 Side Ponel (nisht)
5l09l2l Binding Heod Topping Screw, M3 X 6
5269830 Side Ponel Retoiner
5309260 Side Ponel (teft)
5109222 Binding Heod Topping Screw, M3 X 8
5122540 Toothed Lock Wosher (Externot), 3ó
500ó340 Metol Bonnet
531 7880 S-5 Type Knob
5318040 S-5 Type Knob (Tone Control)
5326460 E-l Typ" Knob (Lever Switch)
W0-3 Typ" Knob (Volume)
U-5 Type Knob (Bolonce)
Binding Heod Topping Screw, M3 X 8
Front Ponel
Holder (tignt Emimed Diode)
Binding Heod Topping Screw, M3 X 8
Stopper (Front Ponel)
Lisht Emiiled Diode (SOA-SOIA-RD)
Rotory Switch Y -l -4-4 (Speoker)
50kO (g) x Z Tone Control Volume
Lever Switch (Power)
Heodphone Jock
Lever Swirch (Control)
Lever Switch (Control, Mode)
250kO (MN, B) X 4 Volume, Bolohce
Volume
I 1025ó0 Rotory Switch SRE2-ó-7 (.Tope Ploy)
1 102550 Rotory Switch SRE2-4-5 (Selector)
5109222 Binding Heod Topping Screw, M3 X 8
5166520 Wosher Heod Topping Screw, M3 X 12
5516940 Foot
5458220 Bottom Plote
5047 470 Mosking (Lever Switch)
5-7. Other Parts
Parts List
(Front Side)
Parts No. Stock No. Descri ption
v
V
V
Y
Parts No. Stock No. Desc ription
53r800r
531 8080
51 09222
I ssotzt o
I szopsoo
51 09222
5269880
7726080
ll0l5ó0,1
1 0900ó0, I
r r 70330
24301 90
1 170490
I r 70500
I 0ó0320
I
2
3
4
5
6
7
8
I
t0
il
12
l3
14
l5
16
l7
l8
19
20
21
22
23
24
25
26
27
28
29
30
3I
32
33
VRor -o+ I 060320 250kO (MN,r) x +Vorioble
Resistor
5-6. F-2094 Accessory Switch Circuit
Board
(Stock No. 7592'l2O Complete Circuit Board F-2094)
Conductor Side
Parts List
Parts No. Stock No. Description
Cot, oz 0óó0391 390pF
Cos, o+ 0601227 0.0221tF
Ror, oz 0l 071 03
Ros, o+ 01 071 03
Ros, oó 0107823
Roz, 08 0l 071 84
Rop, ro 0107223
I okc) I
r0kr) I
82ko \
I 80ko I
22ktt )
sOV C.C.
sOV M.C.
%w c.R.
Sot
Soz
Sog
I r 70500
1170490
1 170490
C.R. : Carbon Resistor
S.R. : Solid Resistor
Ce.R. : Cement Resistor
M.R. : Metallized Film
Resistor
M.G. : Mylar Capacitor
E.C. : Electrolytic Capacitor
Ibbreviatie]r§---
c.c.
Ma.c.
o.c.
P.C.
T.C.
BP.E.C.: Bi-Polar Electrolytic
Capacitor
Ceramic capacitor
M ica Capacitor
Oil Capacitor
Polystyrene Capacitor
Tantalum Capacitor
t3
sLcr435r II
SLC .l4301 ) Lever Switch
sLcr430l J

.*R
\ *\\\\
\§ § \\-
) \\
@@
??
oe
w
ryb$
i\1 /
\'
//
u0z /
g/ //.0 a
\/
(,'

GAU -7roo
5-8. Other Parts (Top Side)
Power Cord
Fuse Holder
COzo
COtoz
COzos
Parts List
Speaker Terminal
tffi,
+SSs''' '
ffi
ffi
§S$
Ground
Terminal
Jor
Uor
Y
Y
V
Y
*8U&.
S* ,tt,'
ffifï
.ffi
\
e
*,
TE
r
I
i
Parts No. Stock No. Description Parts No. Stock No. Description
Coor 05593ó0 10000pF) -^.,
Cooz os5e3óo l oooopFJ 5ov E'C'
LEDzot 7726080 SDB-501A-RD Lisht Emitted Diode
2090040 DIN Jock
ll1o29o ssBo2332 ] stide switch
1 r r 0280 ss802230 )
pUor [zuooso
[24 r 00e0
22901 00
3800020
2230050
Voltoge Selector, socket
Voltoge Selector, plug
4P Speoker Terminol
Power Cord (rP-zOO)
Ground Terminol
Jot
Soe
So+
COzo.r-zos 2450050 AC Outlet
óA Power Fuse (t OO-l 17V)
34 Power Fuse (zzO-240Y)
Fuse Holder
( o tsi 290
I or, 1260-
I rroooro
ttot
Tzor
LEDzol
t5
4002.l l0 Power Tronsf ormer
pe1mmk

,§,
\r
\,
b
5-9. Other Parts (Bottom Side)
Parts List
Parts No. Stock No. Description
Rzor
Rtoz
C zos
Jtot
C.R. : Carbon Resistor
S.R. : Solid Resistor
Ce.R. : Cement Resistor
M.R. : Metallized Film
Resistor
M.C. : Mylar Capacitor
E.C. : Electrolytic Capacitor
BP.E.G.: Bi-Polar Electrolytic
Capacitor
Cera m ic capacitor
M ica Capacitor
Oil Capacitor
Polystyrene Capacitor
Tantalum Capacitor
TR .tz
TR .ts
TR .tp
TRzo
TRzr
TRzz
TRzs
TRz+
TRzs
TRzo
TRzz
TRza
Czog
Rzor
Rzoz
Jtot
Tronsistor
0308441 , 2
0308441,2
030327 1 , 2
030327 1 , 2
030ó.l90-3
030ól90-3
030ó190-3
030ó190-3
0300630-3
0300ó30-3
0300ó30-3
0300ó30-3
065980 r
01 04221
01 04221
24301 90
2SD382 (M, L)
2SD382 (M, L)
258537 (M, L)
258537 (M, L)
2SCl ól g (R, O, Y)
2SCl ó19 (R, O, Y)
2SCl ól g (R, O, Y)
2SCt ót g (R, O, Y)
2sAgog (R, o, Y)
2sAgog (R, o, Y)
2sAgog (R, o, Y)
2SAg0g (R, o, Y)
0.01 1tF I .4kV C.C.
;;i;ïl ,* cR
Heodphone Jock
c.c.
Mi.G.
o.c.
P.C.
T.C.
Y
r6

tAU -77oo
6. REPLACEMENT OF
POWER TRANSISTORS 7. PACKING LIST
Parts No. Stock No. Description
1) Remove
pa ne l.
2) Remove
3) Remove
F is. 6-1)
4) Remove
ing heat
5) Remove
(F-20e7),
Fig. 6-1
Fig. 6-2
4 pcs-screws insta ll ing o n Ieft (or right) s ide
11 pcs-screws installing on bottom plate.
all connectors and screws, O and @ (see
insta ll ing o n F -2097 .
screw/ @, @, @ and @ (see tig.6'2) install-
sink.
driver & power supply circu it board ass'y
then replace the transistors with new ones.
9027810 Stylofoom Pocking
91161 52 Vinyl Cover
9008051 Corton Cose
V
8. AGCESSORY
PARTS LIST
Stock No. Description
5066250 Pin Plug Cover
9208250 Operoting lnstructions
9228250 Operoting lnstruction Sheet
Grày
Rà
l7

\- 9. SCHEMATIC DIAGRAM
@rilig,*te;rBffi-.ffiru,n
,r'olnfr'rrl ffi 9*\ tf
PHoNo'\, ffi-ldst#**ol *"II
il
:{r
2SClllSRtr,o)
\-
\-
PRI- Cb'T
R]ONT
CHAN//ËL
PHONO /
PHONO 2
TUNER
AUX /
AUA /
rREC
DECI< /
ipttr
- pFf
1,.."
DECK-?
LprAy
PR€ AUT
MAIN,'N
ro
f..
sf
N
I
lr
IOD I rn,:2SD356(D,E) ?,,
\-
L- T?NE b FILTER F-?096 Sora-d.
T)NE SELECT2R F-2096 Soza-d
TRESLE
T)NE SELECT2R F-2096 Soea=d.
BAS S
S|''ECT]R F-7A97 Sora-a \. PHAN) 2
?. PHONO 1
3. TUNER
4. AUX I
5. AUX ?
TAPE PLAY F-7092 Soza-f 1. C)PY l-? DECK-Z
?. ,, DECK-I
3. DECK.J
4. SOURCE
5. DECK- ?
6, COPY 2.1 DECK_Z
1. ,r DECK-|
SPEAI(ERS &oza-d. 1. OFF
2,4
3.8
4. A+8
M)DE F-7094 Soro-..
MU TING F -?094 Soza,b
L?UDNESS F-2094 S$o,b
Ft LTERS F-2096 Sosa.d.
HIGH
FILTERS F-2096 Sote-d
L0w
REVERSE
NORMAL
MONO
-tsdB
OUT
- s0dB
L}w 800sr
OUT
HIOH KLOW B@ST
TKHz
OUT
72KHz
6OHz
OUT
?0Hz
5YM BOL
A CERAMIC
@ MYLAR
A STYROL
@ TANTALUM
ALL RESIST7RS r/z WAITS
UNLESS OTHERW]SE NOTED,
I
,',?-ïil-Írl lll i | 'Ysi:*,l.il -l'l'
q -;] r-fl1 *'
,í[jz^, lt.Ll '5 \A*Itz
-ro- I 6ND
ffi,El
lol
rq lti
--1ar I
U
f;;__{ceoz I
[ -+ l-
]Jo* ï"''ï
t f- l-
i §t
il
f"i
==
v0L{/ME F-2093 VRor.oz
BALANCE F -?093 VRos,o+
TREBLE F-7095 VRor,oz
MTDRANC F -2095 VRos,u
8ASS F- 2095 VRos,os
Rss
/80( )
\
, ")i
- §1
§
.ï \
§
F{
Y
C
rn,, 2SB5 26,í3:,
\-

Design and specifications subject to change without notice for improvements.
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I
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