Expert TA-930 User manual

SERVICE MANUAL
ExpGrl
TA-930
Stereo Receiver
SPECIFICATIONS
FM SECTION AUDTO SECTION
Tuning Bange: 87.5 - 108 MHz Power Output: 30 watts per channel, minimum
Usable Sensitivity (lHF) continuous both channels driven into
Mono: 2 pV 8 ohms from 40 Hz to 20 kHz with
Stereo: 4 ttY no more than 0.3% total harmonic
50 dB Ouieting Sensitivity distortion.
Mono: 4 yV Total Harmonic Distortion: Less than 0.3% at rated power into
Stereo: 40 pV I ohms (40 Hz to 20 kHz)
Signal-to-Noise Ratio lntermodulation Distortion: Less than 0.3% at rated power into 8
(Mono): 14 dB ohms (70 Hz :7 kHz = 4 : 1l
Frequency Response: 40 - 1 5,000 Hz (t 2 dB) Powerband Width: 40 Hz - 20 k{z
Harmonic Distortion Residual Noise: 0.5 mV
Mono: 0.15% Damping Factor: 30 at 8 ohms
Stereo: O.3o/o lnput Sensitivity/lmpedance
Capture Ratio: 1 5 dB Phono: 2.5 mV/47 kohms
Adjacent Channel Selectivity (r20O kHz) AUX: 150 mV/47 kohms
Minimum: 15 dB Tape Play: 150 mV/47 kohms
Spurious Response Ratio: 75 dB Maximum lnput Level: 100 mV (Phono)
lmage Bejection: 55 dB Signal-to-Noise Ratio (lHF A)
lF Reiection: 66 dB Phono: 64 dB
AM Suppression Ratio: 50 dB AUX, Tape: 84 dB
Muting Threshold: 0.9 - 1 5 pV Tone Controls
Stereo Separation Bass: t 8 dB at 100 Hz
1,000 Hz: 45 dB Treble: I I dB at 10 kHz
100 - 10,000 Hz: 38 dB Loudness Control: + 8 dB at 100 Hz
Stereo Threshold: 15 pV (-30 dB Volume Level) + 4 dB at 10 kHz
SCA Rejection Ratio: 60 dB Low Filter: 3O Hz (-6 dB/oct.)
Sub-carrier Suppression: 60 dB Output Level
'Tape-Rec.: '150 mV
AM SECTION Headphones: 350 mV
Tuning Range MW: 515 - 'l ,620 kHz Speaker lmpedance: 4 - 16 ohms
Usable Sensitivity MW: 20 ttY
lmage Bejection (MW) : 45 dB GENERAL
I F Rejection (MW) : 40 dB Power Consumption: 120 watts
Harmonic Distortion: O.5/o Power Supply: 220V AC, 50 Hz
Dimensions: 442(Wl x 385(D) x 130(H) mm
Weight (Net): 8.8 kg (19.4 lbs.)
SPECIFICATIONS AND DESIGN ARE SUBJECT TO CHANGE WITHOUT NOTICE.

153
PARTS LIST
Part No. Description Symbol No. O'ty
a set
INTEGRATED CIRCUITS & TRANSISTORS
LA 1 231
HA1197
LA335OSS
2SC929 (D) , (E)
2SC1327 (S), (T)
2SC82g (O) , (R)
25861 6 (O) , (R )
2SD586 (O) , (R)
258647 (C) , (D)
25D667 (C) , (D)
2SC7g8 (F), (G)
2SCB28A (O) , (R)
2SD667A (C), (D)
25D234 (O) , (Y) or
2SC139g (P) , (O) , (R)
2SC 1328 (S) , (T)
IC
IC
IC
Tra nsistor
Tra nsistor
Transistor
Transistor
Tra nsistor
Tra nsistor
Tra nsistor
Tra nsistor
Transistor
Tra nsistor
Tra nsistor
Tra nsistor
tc101
tc103
tc102
o101
4152, 153
0151
0303, 304
0301 ,302
0307, 309
0305, 306, 31 1
312
o31 3, 314
0309, 310
0201 , 202
o203
o401 -406,
501-504
1
1
1
1
2
1
2
2
2
4
2
2
2
1
10
D!ODES
1S 188AM
W03B or 1N 4OOZ
or V06B
G P.2OB
DS-442 or 151555
HZ36-2
HZ12-C-3
HZ12-B-2
GLgPR2
Germaniu m D iode
Silicon Diode
Silicon Diode
Silicon D iode
Zener D iode
Zener D iode
Zener D iode
L.E.D.
D101,102
D301 -312,
205
D201-204
D 151
ZD2O1
ZD202
2D301 ,302
LED 1 51
2
13
4
1
1
1
2
1
CONTROLS
EW K -CPA323B F5
EWK -G4A323375
EWK -G4A323854
EW K -G4A32381 5
2U.KS}B, BO
5KS}8, BO
1 K SlB, 80
Potent iometer
Potent iometer
Potent iometer
Potent iometet
Carbon Trimmer
Carbon Trimmer
Carbon Trimmer
V R4O3 (VO L)
VR4O4 (BAL)
VR4O2 (BAS)
VR4O1 (TRE)
SVR 101
SVR 151
svR1,152,301
302
1
1
1
1
1
1
4
co LS & TRANSFORMERS
141015
141016
FSN 1 067
1 40025
1 4003 1
1 35006
1 80003
1 80004
1 0400 1
122022
NPT.O3355
FM !FT
FM !FT
AM IFT
AM IFT
AM IFT
MW OSC Coil
lnductor
C hoke
Co il
Loopstick Antenna
Power Transformer
T 101
T 102
T1
T2
T3
L2
11 03
L101,102
L301,302
L1
1
1
1
1
1
1
1
2
2
1
1
SWITCHES
ESB-7097
ESB.75329
sw-3655009
AC ON IOF F Switch
Push SW
Rotary Slide Switch
S8
S1
1
1
1
CONNECTORS & TERMI NALS
H LJ -O279-O1-O20
N41287
1784T0301-1 1
B2-703N -01
D2-71 3N -01
vB-oo27
s-N 5053
1L4P
D5-71 0N -00
N41 670
Headphone Jack
8-pin Jack
Speaker Terminal
DIN ANT Socket
Co -ax ia I Socket
Ground Terminal
Fuse Clip
Strip Terminal
Dl N Jack
RCA 4-pin Jack
1
1
1
1
1
1
1B
1
1
1
FUSES, METE RS & LAMPS
1A,50 x20
2A, 50 x 20
3.15A ,5Q x 20
4A,50 x 20
EMT.226
EMT -227
Fuse
F use
Fuse
F use
S ig na I Meter
Tun ing Meter
Fu307,308
F U901 , 303,
304
Fu301 ,3O2
F u9O2,
903
M1
M2
2
3
2
2
1
1
Part No. Description Symbol No. 0'ty
a set
B F31 0-50020A Lamp L901-903 3
FILTERS
SFE-1O.7ML
1 84001 Ceram ic F ilter
F ilter F1,2
L1 51 .152 2
2
RESISTORS
112W, 56r}
112W, 3300
112w, 3.3KSl
112W, 3.9KO
1W, 1 0Sl
1W, 68O
1W, 3300
3W, 270A
3W. O.47 A
Carbon Resistor
Carbon Resistor
Carbon Resistor
Carbon Resistor
Carbon Resistor
Carbon Resistor
Carbon Resistor
Carbon Resistor
Wire-wound Resistor
R309, 31 0
R 305-308
R 31 7-320,
311, 312
R 205
R329-332
R202
R335,336
R201
R 301 -304
2
4
6
1
4
1
2
1
4
CAPACITORS
0.001pF
0.01pF
O.O22pF
0.04p F
O.O47 pF
500V 0.01 pF
FC12P F (D)
FC 1 sPF (D)
FC 3OPF ( K)
FC 35PF (K)
FC lOOPF (K)
FC 1SOPF (K)
FC 2OOPF (K)
FC 33OPF ( K)
FC sOOPF (K)
ECN.C4A 1O3M
50v 350PF (J)
50v 1500PF (K)
50V 0.027pF (M)
50V 0.0a7pF (M)
50V 0.o6BpF (M)
50V 0.1pF (M)
sov 0.033pF (K)
sOV 0.047pF (K)
50V 0.001rrF (J)
50V o 0033pF (J)
sov 0 015pF (J)
50V 0.039rrF (J)
50V 0 068pF (J)
50V O.12pF (J)
1 OTW 1 O0pF
1 6TW 33pF
1 6TW 1 OpF
1 6TW 22pF
1 6TW 100pF
1 6TW 22OpF
25TW 3.3rrF
25TW 4.7 pF
25TW 47pF
35TW 47pF
42TW 6800pF
50TW O.47 pF
50TW 1pF
50TW 4.7 pF
50TW47pF
50TW 22OpF
63TW 47OpF
50TW O.22pF
50TW 0.33pF
25TW 4.7 pF
50TW 1pF
SC
SC
SC
SC
MC
Ceram ic
Ceram ic
Ceram ic
Ceram ic
Ceram ic
Ceram ic
Ceram ic
Ceram ic
Ceram ic
Ceram ic
Ceram ic
Ceram ic
Ceram ic
Ceram ic
Ceram ic
Paper,0.01pF
Polystyrene GS%l
Po lystyrene (t 1 0%)
My lar lt2Oo/ol
My lar (t2Oo/ol
My lar lt2O%l
My lar (tZOo/ol
My lar (t 1 0%)
M y lar (t2Oo/ol
My lar lt5o/ol
Mylar lt5%l
Mylar lt5o/ol
My lar lt5o/ol
My lar G1o/ol
My lar (t1o/ol
E lectrolytic
E lectrolytic
E lectrolyt ic
E lectrolytic
E lectrolyt ic
E lectrolytic
E lectrolytic
E lectrolytic
E lectrolytic
E lectrolyt ic
E lectrolyt ic
E lectrolytic
E lectrolytic
E lectro lyt ic
E lectrolyt ic
E lectrolyt ic
E lectrolytic
Alum. Electrolytic
Alum. Electrolytic
E lectrolytic, Low Noise
E lectrolytic, Low Noise
c2, 8 , 102
c10,11,101 ,
103
c 1 , 3 , 7 , 104
C4
1 05- 1 09, 1 12,
1 13, 115
c209-213
c65
c62
c419, 420
c31 1 ,312
c51 9 ,520
c423, 424
c321 ,322,517 ,
518
c116
c309, 31 0
cgo 1 ,902
C6
c152
c307, 308
c14
c16
c303-306
c1 57, 1 58
c153
c409,410, 509
510
c507, 508
c51 1 ,512
c411-414
c425, 426
c401 , 402
c405, 406 , 417 ,
418
c505,506
c9, 17
c15
c151 , 165
c206 ,208
c13
c12
c313,314,317,
318
c51 3 ,514
c201 ,202
c114, 1 55
c110
c111
c31 5, 31 6
c205,207 , 209,
501, 502
c203
c154
c156
c407, 408 , 415,
41 6, 421 , 422,
515,516, 119
c161-164,319,
320, 403, 404,
503 ,504
3A
4
4l
il
), I
2l
2l
2l
;l
1l
tl
il
2l
2l
4l
7)
4
2
2
1
2
2
1
1
4
2
2
2
1
1
2
5
1
1
1
I
10
l
a
l
-1-

153
Part No. Description Symbo! No. O'ty
a set
50TW 3.3pF E lectrolytic, Low Noise c1 59, 1 60 2
APPEARANCE PARTS
N 20542
N2O3BB
N 20509
N41232
N41 233
N41 221-S
N41 281 -S
N30209-1 B K
N 30229-3
N30229-4
N41224
N41 665
N41661
N41 666
N41 667
N30228
N 204 1 2-1
No. 71 04
Front Panel
Case
Rear Panel
S ide Cap, R ig ht
Side Cap, Left
D ia I Po inter
Pushbutton, Power
Knob Guide
Knob Guide
Knob Guide
Pushbutton
Tuning K nob 44
Knob 21
Knob 21
Knob 19
Front Window
D ial Scale
Foot
VOLUME
F UNCT ION
Audio Controls
1
1
1
1
1
1
1
1
1
1
7
1
1
1
3
1
1
4
U
\,
Note: I. Part orders must contain Model Number, Part Number and Descriptlon.
2. Ordering quantity of screws and/or resistors must be multiple of 10 pcs.
3. Resistorsnotdetailedinpartslistareall carbontype,yawatt,Withregardtothevalue,refertotheschematicdiagram.
SIDE CAP,
LE FT
N4 1 233
F RONT WI N DOW
N 30228 DIAL POINTER N412215 DIAL SCALE N 204 12-1 TUNING KNOB 44
N41 665
HEADPHONE JACK
H LJ-0279-01 -020
F RONT R IV ET
N41 1 52A
SI DE CAP,
RIGHT
N41232
PUSH BUTTON ,
POWE R
N41 1 01
KNOB GUIDE
N30209-18 K
KNOB GUIDE
N30229-4
KNOB 21 KNOB 1 9
N41 661 N41 667 FRONT PANEL KNOB 21 PUSHBUTTON KNOB GU!DE
N20542 N41661 N41224 N30229-3
\,
U
SPEAK E R TE RM INAL
1784T0301 CASE REAR PANEL N20388 N20509
LOOPST !C K
ANTENNA
122022
JAC K
8-PIN JACK G ROUND CO-AX IAL
N41287 TERMINAL SOCKET
vB-ooz7 D2-713N-01
CORD
STRAIN
RELIEF
S R 3P-4 DIN ANT SOCKET
B2-703N -01
L IN E COR D FOOT
ACC-010 NO. 7104 DIN JAC K
D5-71 0N-00
RCA4PIN
N41 670
Part No. Description Symbol No. O'ty
a set
N41 152A
ACC_o1 O
S R 3P-4
Front R iver
L i ne Cord
Cord Strain Relief
2
1
1
MISCE LLANEOUS
FM5OO2A
FB127 U 16
MP-50
50K
No. 18
No.24B
oM- 1 53
FM ANT
FM/AM Tuning Unit
M ica
lnsulator
M ica
I nsu lator
lnstruction Book
\ 25861 6
/ zsoseo
) ,r.1 3eB
1
1
4
I1
1
PACKING MATERIAL
N41668
N 20389
N203904
N41 321
N41424
N41 31 B
N40487
Carton
Pad, R ight
Pad, Left
Pad, Top
Pad D
Po ly. Bag
Poly.Bag for Unit
for lnst. Book
1
1
1
1
1
1
1
OrO 00000
-2-

153
ALIGNMENT PROCEDURE (TUNER)
Note:
1. Signal input must be kept as low as possible to avoid AGC and limiting action.
2. FM-R F alignment on lower side can not be adjusted since a f ixed coil is employed.
3. Do not try to adjust f ilters (L151 , 1 52) since their alignment needs special instruments.
Output
Setting
Set the f unction selector to MW.
indicato r,
connection
AM.IF ALIGNMENT
Dial
Setting Adjust Adiust for
Signal Generator
Connection
Point of I Connect V.T.V.M.
non-inter- I to the TAPE REC
MW.RF ALIGNMENT
470 k Hz
400 Hz (Mod.)
3O%o (Dev. )
T1 (I FT)
T2 (I FT)
T3 (IFT) Maximum
O utput
Set the function selector to MW.
Connect V.T.V.M.
to the TAPE REC
jack Maximum
Output
L2 (MW OSC coil)
L1 (l\ltW ANT coil)
600 k Hz
400 Hz (Mod.)
30o/, (Dev.)
TC102 (MW OSC
trimmer) Maximum
TC101 (MW ANT I Output
trimmer)
Repeat steps (4) and (5). AM SIGNAL METER ALIGNMENT
Set the f unction selector to MW.
140 kHz
400 Hz (Mod. )
30% (Dev. )
1 400 kHz Connect V.T.V.M
to the TAPE R EC
j ack
I I I Needledeflection
1000 kHz I SIGNAL I SVR1 I as shown in
Meter I lFig. 1
FM.IF ALIGNMENT
Set the f unction selector to FM. Pointof lFttlt TUNING 1T101 (FM Center position
of the meter
sca I e.
no n-i nter- I meter DISCRI IFT)
ference
T102(Flttt
DISCRI IFT)
Te1 (FM IFT)
M inimum
D istort ion
1 000 kHz
80 dB.
400 Hz (Mod.)
3O%o ( Dev. )
98 MHz
60 dB.
1 kHz (Mod.)
100%o (Dev.)
No signal
Co n nect
d isto rt io n
meter to the TAPE
R EC jack
FM.RF ALIGNMENT
106 MHz TC3 (Fm
trimmer)
TC1 (FM
trimmer)
TC2 ( FM
OSC
ANT
R F trimmer)
FM SIGNAL METER ALIGNMENT
106 M Hz
60 dB.
1 kHz (Mod.)
10O% (Dev.)
Connect V.T.V.M.
to the TAPE REC
j ack Maximum
O ut put
98 MHz
80 dB.
Mod ... off 98 MHz SIGNAL
meter Needle deflection
as shown in
Fig.2
SVR101
-3-

153
Adiust for
1gkFl t 1OFlz
Left mod. ...
minlmum
right o utput
R ight mod. ...
minlmum left
output
ALTGNMENT COMPONENT VIEW (TUNER)
(coMPoNENT SrDE)
Step Signal Generator Dial I . -.:'---' I
#;;sl :ll^11?1,- I Adiust
Connection Settin gFM MPX PILOT ALIGNMENT
14. Push the FM MUTING button.
15 No signal Point of
no n-inter-
ference
Con nect f req uency I
counter to TP I SVR 1 51
and ground. I
FM STEREO SEPARATION ALIGNMENT
16 Release the FM M tJT I NG button.
17. (c) 98 MHz
60 dB
1 ktlz (stereo
mod. L or R)
30% (Dev.)
98 MHz Connect V.T V.M. I to the TAPE R EC I SV R152
jack right channel I
or left channel. I
Output
indicator,
connection
L 1 (MW)
IC3
TCl tc2
e
oo ac
t\
\
IClOl TC1O2
Te1
@
I\!2
ME
'D
P
ry SVR151
@
F-l tr Trol
tr1102 I drP
g svRr52 SVRlO.r@
SIGNA
Fig. 1
SIGNAL
Fig.2
-4-

153
ALIGNMENT PROCEDURE (TUNER)
Note:
1. Signal input must be kept as low as possible to avoid AGC and limiting action.
2. FM-R F alignment on lower side can not be adjusted since a fixed coil is employed.
3. Do not try to adjust filters (L151 . 152) since their alignment needs special instruments.
Step Signal Generator Dial
Setting
Output
indicator,
connection Adiust Adiust for
Connection Setting AM.IF ALIGNMENT
1Set the f unction selector to MW
2. (A) 470 kHz
400 Hz (Mod.)
30To ( Dev. )
Pornt of
no n- inter-
f erence
Connect V.T.V.M
to the TAPE R EC
jack
T1 (IFT)
T2 (I FT)
T3 (IFT) Maximum O utput
MW. RF ALIGNMENT
3. Set the function selector to MW.
4. (A) 600 k Hz
400 Hz (Mod. )
30% (Dev )
600 kHz Connect V.T.V.M
to the TAPE REC
jack L2 (MW OSC coil)
L1 (MW ANT coil) Maximum
Output
5. (A) 140 kHz
400 Hz (Mod. )
30/o ( Dev. )
1 400 kHz Connect V.T.V.M.
to the TAPE R EC
jack
TC 1 02 (MW OSC
trimmer)
TC1O1 (MW ANT
trimmer)
Maximum
O utput
6. R epeat stepl (41 and (5). AM SIGNAL METER ALIGNME NT
7. Set the function selector to MW.
B(A) 1 000 kHz
80 dB.
400 Hz (Mod. )
3O%o (Dev.)
1 000 kHz SIGNAL
Meter SVRl Needle deflection
as shown in
Fig 1
FM. IF ALIGNMENT
9. Set the f unction selector to FM.
10. No signal Point of
non-inter-
ference
FM TUNING
meter T101 (FM
DISCRI IFT) Center position
of the meter
sca I e.
11 (B) 98 MHz
60 dB.
1 kHz (Mod.)
100% (Dev )
98 MHz Co n nect distortion
meter to the TAPE
R EC jack
T102(FrVr
DISCRI IFT)
Te1 (FM IFT)
M inimum
D istort ion
FM. RF ALIGNMENT
12. (B) 106 M Hz
60 dB.
1 kHz (Mod.)
lOO%o (Dev. )
106 MHz Connect V.T.V.M.
to the TAPE R EC
j ack
TC3 (FM OSC
trimmer)
TC1 (FM ANT
trinimer)
TC2 (FM RF trimmer)
Maximum
O utput
FM SIGNA L METER ALIGNME NT
13. (B) 98 MHz
80 dB.
Mod ... off 98 MHz SIGNAL
meter SVR101 Needle deflection
as shown in
Fig.2
-3-

153
ALIGNMENT PROCEDURE (TUNER)
Note:
1. Signal input must be kept as low as possible to avoid AGC and limiting action.
2. FM-R F alignment on lower side can not be adjusted since a f ixed coil is employed.
3. Do not try to adjust filters (L151 , 152) since their alignment needs special instruments.
Output
Dial
Setting indicator,
connection
AM.IF ALIGNMENT
Adjust Adiust for
Set the f unction selector to MW.
Signal Generator
Point of I Connect V.T.V.M.
non-inter- I to the TAPE REC
f erence I jack
MW-RF ALIGNMENT
Set the f unction selector to MW.
Connect V.T.V.M.
to the TAPE R EC
jack
470 k Hz
400 Hz (Mod.)
30% (Dev.)
T1 (I FT)
T2 (I FT)
T3 (IFT) Maximum
O utput
600 kHz Maximum
Output
Maximum
O ut put
Repeat steps (4) and (5). AM SIGNAL METER ALIGNMENT
Set the function selector to MW.
L2 (MW OSC coil)
L1 (MW ANT coil)
600 k Hz
400 Hz (Mod )
30o/o (Dev.)
1 400 kHz Connect V.T V.M
to the TAPE R EC
jack
140 k Hz
400 Hz (Mod.)
3O%o ( Dev. )
TC102 (MW OSC
trimmer)
TC1O1 (MW ANT
trimmer)
1000 kHz
BO dB
400 Hz (Mod.)
3O%o (Dev.)
1000kHz ISIGNAL Needle deflection
as shown in
Fig. 1
FM.IF ALIGNMENT
Set the f u nct ion selector to F M .
FM TUN I NG
meter Center position of the meter
sca I e.
M inimum
D istort ion
T101 (FM
DISCRI IFT)
T1O2 (FM
DISCRI IFT)
Te1 (FM IFT)
No signal Point of
no n-inter-
ference
98 MHz
60 dB.
1 k Hz (Mod. )
100%o (Dev.)
Co n nect
distortion
meter to the TAPE
R EC jack
FM.RF ALIGNMENT TC3 (FM OSC
trimmer)
TC1 (FN/l ANT
trimmer)
TC2 (FM RF trimmer)
106 M Hz
FM SIGNAL METER ALIGNMENT
106 MHz
60 dB.
1 kHz (Mod.)
l)Oo/o (Dev. )
Connect V.T.V.M.
to the TAPE REC
jac kMaximum
O ut put
98 MHz
BO dB.
Mod ... off 98 MHz SIGNAL
meter Needle deflection as shown in
Fig.2
SVR101
-3-

153
TUNER BOARD (TI M-l 31A) (ForL srDE)
tI IUX TtItR
TTIUTI - +
tlt,,
MAIN BOARD
^1, ^1,
(MPA-l 308-1 ) (FotL srDE)
itrffi ffi'''=':: :'TIl
f' s r *I"'.".'l
= "t' ,, '{ ""Sul'r.:,.,;
>Hil/Wll--{Ji.l
t i Rr57 | 'r,r -tr rtll
ffi'Ili,*.#. ]
3!55,',iiil
# r'I
-6-

153
swtrcH BoARD (ssw-l 30)
(FOrL S!DE) FUSE BOARD (FU-l 44Al
(FOrL SrDE)
I
r
I
fi
=fi
It
bb
f$
-f_;,_f--
*l=l
t
.,t
F
*T
i,:
'li
li
i.
- -'e.,ry.aa,'.4iri
*g!.*--- - =
.rS a
L
l__
I Pnono-ril I

153
SCHEMATI C DIAGRAM
rurER l0ln0 ( Ilr -l3l)
I];
:Il
:i= I
.I. I
-o,x
E
I'
L___
3
I
\
f
:
I
I
\l/ I
I
L-
-8-

153
---lctlt
\I
I
I
I
I
I
I
I
J
;l il=l :l:l :l :l il
| .E =liL_=LJi=,
, iTi iTi:r
-9-

153
STRINGING DIAGRAM
START
TER
-10-