Onkyo A-7022 User manual

SERIAL NO. 3006
ONKYO SERVICE MANUAL
OLID STATE STEREO PRE MAIN AMPLIFIER
model A-7022
UDO COMPOREN

SPECIFICATIONS
Main Amplifier Section
Power Output Dynamic 200W (THF 42) 150W (IHF 8Q)
72W +72W (4Q both channel driven}
65W /65W (8Q each channel driven)
52W + 52W (8Q both channel driven)
Continuous
Total Harmonic Distortion 0.1% at Rated Output
0.03%, at 1OW Output
Inter Modulation Distortion 0.05% at Rated Output
Power Bandwidth 10-100, 000Hz(-3dB THD
0.2%)
Signal to Noise Ratio 110dB(IHF A NETWORK)
Damping Factor 80 at 8
Rated Input and Impedance 1V/100kQ
Load Impedance 4-16Q
Pre Amplifier Section
{
i
PHONO-1/~2:1. 2/2. 4/4. 8mV (50kQ)| Inputs
TUNER, AUX, TAPE PLAY:
Input Sensitivity
100mV (100k)
Total Harmonic Distortion 0.03%at Rated Output
Intermodulation Distortion 0.05% at Rated Output Outputs
RIAA Deviation
Phono Overload
+0. 5dB (30-15, 000Hz )
300mV RMS at 1kHz,1.4V RMS
at 10kHz
PHONO -1/-2:75dB(THF A
NETWORK)
TUNER/AUX:90dB(IHF A
NETWORK)
Signal to Noise Ratio
Features
Output Voltage 1V
Tone Control] with 2dB/step Switch and Frequency Shift type
BASS :400/125Hz
TREBLE: 2k/8kHz
Frequency Shift
Bass Control
Treble Control
+5 steps Boost and Cut
+5 steps Boost and Cut
Filter HIGH 8kHz(6dB /oct. )
LOW 30Hz (6dB / oct. ) !
Muting ~20dB , Power Supply Rating
Loudness +5dB at 70Hz, +5dB at 10kHz , Semiconductors
Controls POWER
SPEAKERS (OFF, A, B, A+B)
SELECTOR( AUX, TUNER, PHONO
1, PHONO 2, MIC) Weight
TAPE MONITOR(PRINT 1-2,
TAPE-1, SOURCE, TAPE-2,
PRINT 2-1)
Dimensions
MODE(REV, NORM, R+L, L, R)
VOLUME/BALANCE
TREBLE
BASS
FREQUENCY SHIFT SWITCH
BASS (400Hz, 125Hz)
TREBLE(2kHz, 8kHz!
MUTING
LOUDNESS
FILTER HIGH
LOW
PHONO SENSITIVITY
(1.2/2. 4/4. 8mV)
PRE MAIN SEPARABLE
SWITCH(UNITE-SEPARATE)
PHONO-1, PHONO-2, TUNER,
AUX, MIC L/R
TAPE PLAY-1, TAPE PLAY-2,
MAIN IN
SPEAKER-A, SPEAKER-B
TAPE REC-1, TAPE REC-2
PRE OUT
AC OUTLET UNS WITCHED,
SWITCHED x2
PHONES
2 Phono inputs
2 Tape Monitor and Printing
2dB Step Tone Controller
2 Choice of Turn over Frequency
ASO type protection circuit
Transient Killer circuit
Main Amplifier incorporating
OCL circuit
MIC input
Big Phono Overload
ac 110/120/220/240V 50/60Hz
44 Transistors, 30 Diodes,
2 Thermistors
16 5/8°W x 53/8"H x 14 3/4"D
423mm W x 136mm H x 373mm D
10.5kgr, 23lbs

1. COMPONENT LOCATIONS
DESCRIPTION DESCRIPTION
Amp Box assembly
Soft Block
Front Fiber Board
Front Cover
Eind Cap
Flat Screw(3S +5F)
Joiner
Pan head Screw(3P+8F)
Knob—Push Switch
Binder Screw(3+6)
Knob— Tone
Front Panel
Facet
Knob— Volume
Knob —Balance
Knob Sheet
Knob— Selector
Rubber Cushion
Tapping Screw(4+12)
Bottom Cover
Chassis
Toothed Lock Washer
Truss Screw(4+20)
Soft Block
Knob Guide
Knob — Tape
Facet Ring
Concave Washer
Knob — Speaker

2. ADJUSTMENT OF THE IDLING CURRENT
[40.5
cos +6 |
Re
Ray
220/63
ae
|
R329
0301
R328
aio
~----,
Reh.
Q305
1%
8
(21)
—
0327
;
KS)
as
P
Q311.0"
0.047
LS
-
+13
0,
0
1
kK) 2 ty? ] O71
30
10P/500 100
rat
Et
R319 —N,
= 22K Rad7 1
AJ
(1/2
|
R367
TRL
a ($23, R369 68 (17 2) CO
33725
ca
yenmoss
Gum
jeouT
LO
£50my
R307
KU
0.047
ie
680
R321
L301
1apH
fe
#313
339 R309 100 / 30 | - mov) ‘@ Q005
6.067 0309 Scar » Yas (i) |
W2-210
|
5
‘sp.
R323
R369
0307
SS
ax4
\-24V
4.7K
SS
ELK
S471
6
Q3
(172) 1472) [~4.3¥] 30P IN6O R339 5329 l
R371 333 :
22k = D311 01 R325 D305 wv?)
(172)
1001
680
191555
l
re
1K)
“8
ool OE (nau
7470/50 | Rech
LoL ORO _t
Instrument required : DC Ammeter 50mA or 100mA.
DC Voltmeter 50mV or VTVM.
When replacing the POWER transistor (Q003, Q004, Q005, Q006) or the DRIVER transistor (Q311, Q312,
Q313, Q314), check the idling current of the POWER transistor.
To adjust to normal value (40+5)mA, proceed as follows.
(Leh) (1) Cut the connection between +B and collector of Q003 on MAIN Amp assembly, and connect a DC
Ammeter.
(2) Adjust the current to (40+5)mA, with R319(2.2kQ) after switching on for 10 minutes.
(3) After adjusting, connect original wiring.
If a DC Voltmeter (50mV) or VIVM is available, connect the Voltmeter betweenE] and TP terminals.
Adjust the voltage to (20+2.5)mV with R319(2.2kQ).
(Rech) Using R320(2.2kQ), adjust in the same manner as indicated above.
* Note: Volume—Minimum. Open Load.
3. PARTS LIST
DESCRIPTION SPECIFICATION |Q’TY| STOCK NO.
Equalizer Amp ass’y NAEQ-206 12939506
Tone Amp ass’y NATC-186b 12939586B
Main Amp ass’y NAMA~187a 12939587A
Power Supply ass’y NAFI-207 12939507
Protector ass’y NAPC-208 12939508
Transistor 25C945(P) 2210353
ZSD¢27 25 D218(M 2200042
2200142
25899 /

PARTS NO. DESCRIPTION SPECIFICATION (QTY STOCK NO.
PL0O1 Pilot Lamp 6.3V0.15A 1 210003
T001 Transformer-Power NPT-552ADGQ 1 230056
ore Capacitor-Electrolytic CE62W50V8200uF 2 | 3504035A
CE04W50V33uF 2 | 325783301A
C305, 306 | Capacitor-SP SP04C25V2. 2uF 4 | 392250229
cea8 V SP04C25V10uF 2 Volume
RO15 Variable Resistor N24RDGSOOKMN250KB2T | 1 | 5104006 Balance
S001 S witch-Rotaly NRS-385-20Y 1 | 250165-1 Selector
S003 " NRS~465-15Y 1 | 350175-2 Tape Monitor
S004 " NRS-125-15Y 1 250180-1 Mode
S008, S009 ” NRS-2211-20Yb 2 250117 Tone
S013 ¥ NRS-124-20Y 1 250118-1 Speakers
S002 Switch-Slide NSS-2323 1 | 250121 Phono Sens
S012 " NSS-4224 1 250122 Pre Main
$005,010 Switch—Lever NLS-122-29S L 4 | 2501191 Mvtng adness
S006, 007 y NLS~-142-29S L 2 | 250120-1 Frequency Shift
S01 S witch-Power NPS111LA2 1 | 250157
S015 Klixon 9700L-26-11 1 | 252009
S016 " 9700L-21-11 1 | 252011
Jack-Stereo Head Phone 3P64M 1 250126
Jack-Microphone HJ-631S-H-3 2 | 250176~1
F001 Fuse 1.5A-T 1 | 252015
F002 " 2A-T 1 | 252002
Amp Box ass’y 1 | 280762
Front Panel 1 | 280759
End Cap 2 280367
Facet 1 | 280556
Joiner 4 | 280376
Knob-Tone 2 | 283085
Knob-Selector 1 | 283086
Knob-Volume 1 | 283087
Knob-Balance 1 | 283088
Knob-S peaker 1 283096
Knob-Tape ass'y 2 283103
Knob-Power 1 283071
Bottom Cover 1 270295
Rubber Cushion 4 | 280379
Master Carton Box 1 290378
Side Pad 2 | 290203-1
NATC-186b OO
Q201~ Q204' Transistor — 25 A493(GR) 4 | 2210235 =| _
Q205, Q206 ” 25C1000(0-1) 2 | 2210280
Q207, Q208 | " 25C733(GR) 2 | 2210085
Q209 " 2SC734(0-1) 1 | 2210060
D201, D203 | Silicon Diode 1S1554 2 | 223106
C201,C202 Capacitor-Electrolytic CE04W 25V0. 47uF 2 | 352754791A
C205, C206 q CE04W6. 3V100uF 2 | 352721011A
C203, C204 | n CE04W35V220uF 1 | 352762211A
C229 ~ C232 SP04C25V2.2uF(M) 4 3500023
Capacitor-SP

Relay
PARTS NO. DESCRIPTION SPECIFICATION (Q’TY| STOCK NO.
C233~ C234] Capacitor-SNP | SNP04C25V22uF(M) | 2 | 3500027
y | » 2.2uF(M) 2 | 3500025
NAMA-187a -
Q301~ Q304| Transistor 25C€1000(0-1) 4 | 2210280
313 Q314 ” 2S A706(52) 4 | 2200032
Q307, Q308 y 2SC735(GR) 2 | 2210245
Q309, Q310 | » 25 A562(GR) 2» 2210255
Q311, Q312 y 25C1124(2) 2 2200016
Paes, Dane | Silicon Diode 1$1555 4 | 223105
D311 1 10D1 1 | 223801
Dag” Daog | Germanium Diode 1N60(N)FM 4 | 2231031
D309 Zener Diode W Z-210 1 | 223921
1.301, L302 Coil-Load Compensation S-1. 3B 2 231001
C309, C310 Capacitor-Electrolytic CE04W 6. 3V220uF 2 | 352722211A
C341 " " 50V470uF | 1 | 352784711A
R319, R320 | Resistor-Semi Fixed R-HK2. 2KB 2 | 5225005
TH301, TH302 | Thermistor D-22A | 2 | 4000003
NAEQ-206
Q101, Q102 | Transistor 2SA493(GR) 2 2210235
Q103, Q104 | n 2SC1000(0-1) | 2 | 2210280
Q105, Q106 | " 2SC1124(3) 2 | 2200101
D101, D102 Silicon Diode 181555 2 223105
Capacitor—Electrolytic CE04W 16V47uF 2 352744701A
" ” 6,3V220uF 2 | 352722211A
" » 25V100uF 3 | 352751011A
C101, C102 | Capacitor-SP SP04C25V2. 2uF 2 | 3500023
C125, C126 " " 10uF 2 } 3500024
NAFI-207 -
Q401,Q407 Transistor 25D234(0) 2 | 2200113 |
Q403— | " 2SA561(0) 1 | 2210073
Q405 ” 25C945(P) 1 | 2210353
D403 Silicon Diode 10DC2R 1 | 223813
D405 " 10D1 1 | 223801
D401 Zener Diode | WZ-270 1 | 223922
NAPC-208
Q501. | Transistor 25C945(P) "1 | 200353 =]
Q503 n 2$C945(Q) 1 | 2210354
Q505 " 2SD235 | 1 | 2200013
Q507, Q509 | 4 2S C634A (70) 2 | 2210187
Dae’ Deis | Silicon Diode 10D1 4 223801
D523) D525 ' SR3AM-6B 4 | 223815
Des. Deon | Germanum Diode 1N60(N)FM 4 2231031
D513 | Zener Diode BZ-120 1 223918 ©
C501 Capacitor-Electrolytic CE04W25V1uF 1 | 392750101A
C503 " » 16V100uF 1 352741011A
C505 y ” — 1000uF 1 | 352741021A
C513, C515 " CE04W50V 47uF 2 | 302784701A
C521, C523 n » 25V220uF 2 | 392752211A
S501 NRSP5A-DC12 1 | 250166

4.
PACKING
PROCEDURE
1.
Tighten
SPEAKER
terminals
by
a
hand.
9
Clean
an
AMP
BOX
assembly,
attending
to
your
fingerprints.
Set
a
SENSITIVITY
SWITCH
to
center
(2.
4mV).
Clean
a
REAR
PANEL
and
a
RADIATOR.
Insert
SHORTED
PIN
into
PHONO
—
1,2
terminals.
Wrap
a
POWER
CORD
with
a
AC
CORD
WRAPPER
and
bind
it
with
a
rubber
band.
7.
Wrap
unit
with
a
AMP
COVER
and
attach
a
SIDE
PAD
to
both
sides.
g
Put
in
a
CARTON
BOX
and
make
sure
the
front
marks
of
the
carton
matches
the
unit
front.
9.
Put
an
ACCESSORY
BAG
including
an
INSTRUCTION
BOOKLET,
WARRANTY
CARD
ete.
in
the
box.
10.
Close
the
CARTON
BOX
and
seal.
a oe &
AMP BOX ASSEMBLY
pega «|
©)
e)
(AON
Bi
|
eicledeicte
sf
|
Ey | REAR PANEL
iSssss "> SPEAKER
WSS
TERMINAL
Or
ern
VOLT CAUTION TAG
Fa os WRAPPE
Gv
LABEL
li
R
TRANSIENT
KILLER TAG
SIDE PAD

S007 LOW FREQUENCY SHIFT 125Hz. 400Hz (400Hz)
$008 TREBLE $10, -8.-6.-4.+2. FLAT. «2. 24..6.+8. «10 (FLAT)
S009 BASS =10.-8 -6.-4.~+2, FLAT «2.64. +658. +10 (FLAT)
$010 LOW FILTER OFF. ON. a
$011 HIGH FILTER OFF. ON. (OFF
$012. PRE-MAIN UNITE. SEPARATE. (UNITE)
$013. SPEAKERS OFF. A. 8 A+B. (A)
$014 POWER OFF. ON. (OFF)
$017. LOUDNESS OFF. ON. (OFF)
Qidt 284493(GR) Q103 25C€1000 (0-2)
Q105 2501124 (3) Q201.0203 25A493(GR)
Q205 25C 1000 (0-1) Q207.G208 25C733(GR)
Q209 28€ 734 (0-1) Q301. 4303 28C 1000 (0-1)
Q305 254706(52) - Q307 2SC 735 (GR)
Q309 2SA562 (GR) Q311 28C€1124(2)
Q313 284706 (52) Q401 280234(0)
Q403 2S4561 (0) 405 2S8C945(P)
Q407 280234 (0) Q501 2SC945(P)
deer osoo | fseeae 90 ool decane
aoo1 2SC945(P
Q003 2$0218(M) Q005 at yitit
oO
o
DC VOLTAGE ((—¥1) MEASURED WITH OC VTVM TO CHASIS AT NO
SIGNAL INPUT.
ALL RESISTORS ARE IN OHMS. VGWATT UNLESS OTHERWISE NOTED.
ALL CAPACITORS ARE IN pF UNLESS OTHERWISE NOTED.
ELECTROLYTIC CAPACITORS (—-#R—) ARE IN pF/Wy.
NAEQ-206
PHONO -1 73 Sees
ie
coot
T 0047
PHONO -2 (Q-¢———-—___—
'poos
GNO
TUNER
AUX
TAPE -1
PLAY @
Ww
FA
2
° e a)
SELECTOR AUX. TUNER. PHONO-1. PHONO-2. MIC.(PHONO-1)
PHONO SENS 1.2mV. 2amV. 48mV.(2.4mvV)
TAPE MONITOR 12. TAPE-1. SOURCE. TAPE-2. 2-~1.(SOURCE)
MODE REV. STEREO. L. L+R. A. (STEREO)
MUTING 0. -20dB. (0)
HIGH FREQUENCY SHIFT 2KHz. 8KHz. (2KHz)
REC 73 S003 =3:fi os Se aed ee
cis cng
00036) O01
S064: 2R
coi?
oo
cos
O15
BASS- UNIT
R179 150K
NATC- 186b
So err
4+ 83
R203
! 150K
' Q201
-IN é
R021 15M
zor SOIT Gen”
Lal RO87 =
Rot
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$005 a |
7 RoIS0 R017 g
SOOKMN 18K —
nOwSe
7508
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BALANCE = VOLUME
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lah Qi2/25 SP
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THERMO SWITCH
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HE ADPHONE

7. LINE VOLTAGE AND FUSE
The model A—7022 operates on one of the four line voltages, 110V, 120V, 220V, and 240V.
Set the unit to the proper line voltage by following the procedure described below.
CHANGING LINE VOLTAGE SETTING AND FUSE
Turn the voltage selector so that the proper line voltage marking can be seen through the slot on the rear panel. 4 x
Whenever the position of the selector is changed, check the rating of the fuse. 4) op ~
A 2A fuse is to be used for either 220V or 240V operation and a 4A fuse for 110V or 120V operation. 25h (6 YC
Ge
WH GE é (dow
—_
oeanas (uP)
“ i
* N
cr ~P