Onkyo TX-850 User manual

TX-850
SERIAL NO. 3292
ONKYO SERVICE MANUAL
QUARTZ SYNTHESIZED
TUNER AMPLIFIER
MODELS
TX-850/TX-850M
Black model
BHUD, BHUDN, MBHUDN 120V AC, 60Hz
BHUG 220V AC, 50Hz
| BHUQA 240V AC, 50Hz
BHUW, MBHUWX 120/220V AC, 50/60Hz
a so J
SAFETY-RELATED COMPONENT WARNING! !
COMPONENTS IDENTIFIED BY MARK A ON
THE SCHEMATIC DIAGRAM AND IN THE PARTS
LIST ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE THESE COMPO-
NENTS WITH ONKYO PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS
MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM
THE SUPPLY CIRCUIT BEFORE RETURNING
THE APPLIANCE TO THE CUSTOMER,
ONKYO
AUDIO COMPONENTS

SPECIFICATIONS
AMPLIFIER SECTION
Power output
Musical Power Output
Continuous Power Output.
Total Harmonic Distortion:
IM Distortion:
Damping Factor:
Frequency Response:
RIAA Diviation:
Sensitivity and Impedance:
Phono Overload(MM);
Signal-to- Noise Ratio;
Tone controls:
TUNER SECTION
FM:
‘Tuning Range:
Usable Sensitivity:
50dB Quieting Sensi
Capture Ratio
Image Rejection Ratio:
IF Rejection Ratio:
Signal-to- Noise Ratio:
Alternate Channel
Attenuation:
Selectivity
AM suppression Ratio:
Harmonic Distortion:
Frequency Response:
Stereo Separation:
Mating Level:
AM:
Tuning Range:
Usable Sensitivity:
Image Rejection Ratio:
IF Rejection Ratio:
Signal to- Noise Ratio:
Harmonie Distortion:
GENERAL
Dimensions(W * HD):
Weight:
68 watts per channel, min, RMS, at 80hms.
both channels driven.from 20Hz to 20kHz,
with no more than 0.04" total harmonic distortion.
2x175 watts at 4 ohms, 1kHz (DIN)
2110 watts at 8 ohms, 1kHz (DIN)
2100 watts at 4 ohms, 1kHz (DIN)
2x75 watts at 8 ohms, 1kHz (DIN)
0.04% at rated power
0.04% at 1 watts output
0.04% at rated power
0.04% at 1 watts output
40 at 8 ohms
20-30,000Hz +1dB
20 O00Hz +0.8dB
Phono: "/50 kohms
cD: 30 kohms
Tape Play: 30. kohms
Tape Rec: kohms
120mV RMS at 1kHz, 0.04% THD.
Phono: 85dBiat 10mV input, A weighted)
T5dBUIHF A-202)
CD/Tape: 95dBtA weighterd)
80dBUHF A-202)
Bass: +10dB at 100Hz
Treble: +10dB at 1l0kHz
~220V/240v/ pang models~
steps) or
‘KN T5ohms
0.9 wV(SEN 26dB40kHz Devid
75ohms DIN
18.0dBf,2.2 4¢V,750hms
N 46dB40kHz Devi.)
75ohms DIN
Mono: 18.0dBE2.2 WV
Stereo: 372d Bi 20pV,
1.5dB
85dB
90dB,
Mono:
Stereo:
Stereo:
50dB DIN( +300KHz40kHz dev)
50dB.
Mono: 0.15%
Stereo: 0.25%
30 15,000Hz +1.5dB
45dB at 1k
30dB at 100 10,000Hz
17.2dBf, 4.0¢V
16KHA 9kHz steps)
522 1611kHz( 9kHz steps) or
530. 1620kHZ(10KHz steps) (Worldwide model)
300
40aB
s0aB,
svdB
0.7%
435 130 * 351mm
17-1/8" 5-1/8" X13-13/16"
askg. 19.4lbs.
-120V model-
-107.9kHz(200kHz steps)
Mono: 10.8dBE19¢V
Stereo: 17.2dBi4.0 pV
Mono: 172dBi40 pV
Stereo: 37.2dBiA0uV
1.5dB
40dB.
40dB
Mono;
Stereo:
5odB
50dB
Mono:
Stereo:
30 15,000H2 +1 5a
dodB at kHz
30dB at 100° 10,000Hz
17.2dBf. 4.02V
030° 1620kH2(10kHz steps)
30nV
40dB
4udB
40dB
0.7%

REMOTE CONTROL TRANSMITTER RC-119S/RC-118S
‘Transmitter: Infrared
Signal range: Approx. Smeters(16ft.4")
Power supply: TWO "AA” batteries (1.5V *2)
Dimensions(W * HD): 64* 18 176mm
2-1/2" x3/4" x 7"
Weight: M0grams 5.00z{including batteries)
Specifications and features are subject to change without notice.
SERVICE PROCEDURES
1, Replacing the fuses
For continued protection against fire hazard, replace only
with same type and same rating fuse.
D(120V) model
Circuit no. Partno. Description
F901 252050 5A (ST-6), Primary
G (220V) and Q (240V) models
Circuit no. Partno. — Description
F902 252075 2.5A-SE-EAK, Primary
F903 252075 2.SA-SE-EAK, AC outlet
(Only 220V model)
F906 252070 1A-SE-EAK, Secondary
W (Worldwide) model
Circuitno. Partno, Description
F901 252050 5A (ST-6), Primary
F902 252075 — 2.5A-SE-EAK, Primary
2. Change of FM/AM band step.
With the exception of the models below, a BAND STEP
selector switch is not provided.
(FM)
MODEL BAND STEP | _D717,J753 R119
UD 200kHz>S50kHz | Additional | 15k2—24kQ
UG/UQ | SOkHz+200kHz | Eliminated | 24kQ+15k2
(AM)
BAND STEP | D716, 3754
10kHz+ 9kHz | Additional
9kH2>10kHz | Eliminated
In D716/7 188133 (Part No. 223163) is used. In J753/4,
a jumper lead must be inserted. R119, with the muting
amplitude determined. is on the back panel side of FM/AM
tuner and selector circuit printed circuit board assembly
test points TP-1 and TP-2.
— Worldwide model —
Worldwide models are equipped with a step band selector
switch. This switch is located on the back panel. This
switch is set to SOkHz (FM) and 9kHz (AM) at the factory,
but may have to be reset to 200kHz and 10kHz depending
on the area where the unit is used.
De-emphasis FM step AM step
Europe: 50 usec SOkHz 9kHz
US.A.: 75 psec 200kHz 10kHz
3. Memory preservation.
This unit does not require memory preservation batteries.
A built-in memory power back-up system preserves
contents of the memory during power failures and even
when the unit is unplugged. The unit must be plugged in
BACK PANNEL
A F906
FM/AM TUNER AND SELECTOR
CIRCUIT Pe BARD
roo A
rsa A,
a
e901 £8
POWER SUPPLY CIRCUIT PC BOARD
DISPLAY PC BOARD
and the power switch turned on and off once in order to
charge the back-up system. Note that since this is not a
permanent memory the power switch must be turned on
and off a few times each month to keep the back-up
system operative. The period of time during which
memory contents are preserved after power has last been
turned off varies depending on climate and placement of
the unit. On the average, memory contents are protected
over a period of 3 to 4 weeks (a minimum of 2 weeks) after
the last time power has been turned off. This period is
shorter when the unit is exposed to very high humidity or
used in an area with an extremely humid climate.
4. Safety-check out
(Only U.S.A. model)
After correcting the original service problem perform
the following safety check before releasing the set to the
customer.
Connect the insulating-resistance tester between the plug of
power supply cord and terminal GND on the back panel.
Specifications: 3.3 Mohm +10% at S00V.
5. Change of voltage
Worldwide models are equipped with a voltage selector to
conform with local power supplies. This switch is located
on the back panel. Be sure to set this switch to match the
voltage of the power supply in your area before turning the
power switch on.
This switch is set to 220V at the factory. Voltage is
changed by sliding the groove in the switch with the screw-
driver to the right or left. Confirm that the switch has been
moved all the way to the right or left before turning the
power switch on.

EXPLODED VIEW
P902,903
(G/a/w)
EQ

PARTS LIST
REF. NO. PART NO.
Al
AQ
A3
Ad
AS
AT
AS&
AQ
Alo
All
Al2
AlS
Al4
Al5
Al7
Al’
Ald
A20
A21
A22
A23
A24
A25
A32
Al
Ad2
A43
ADL
ASS:
AS7
A61
A8l
A82
A83
A84
A85,
A86
A87
A88
A89
F901
F902
27100163
27121106
27121107
27121109
27121110
27121111
27141261A
27141262
27160225,
27141263
27141264
27190644
27273098A
28133198A
28130249
27270147
870048
27300750
27190524
834430088
831130088
830440089
834430108
834230108
82143006
82142004
833430080,
271104184
28184394
834430088,
801230
1A091121
833430080
28191466A
27175142
28323241
28323361
28323363
28323365A.
28323310
28322925,
28323367
27190647
28323369
252050
252075,
DESCRIPTION
Chassis
Back panel <D>
Back panel <G>
Back panel <W>
Back panel <PX>
Back panel <Q>
Bracket LH
Bracket RH
Radiator
Bracket SH
Bracket H
Holder,dial plate
Joint,power
Back plate
Dial plate
Spacer
3 X8xX0.8t,Nylon washer
4 Strainrelief
Holder
38TTS+8B(BC),Tapping screw
3TTW+8B,Tapping screw
A4TTC+8C(BC),Tapping screw
3TTS+10B(BC), Tapping screw
3TTS+10B(Ni),Nickel screw
3P+6FN(BC),Pan head screw
2P+4F(BC),Pan head screw
3TTP+8P(BC),Tapping screw
Front bracket ass'y
Top cover
3TTS+8B(BC),Tapping screw
3STS+8BQ(BC), Tapping screw
Front panel ass’y
3TTP+8P(BC),Tapping screw
Clear plate
Leg
Knob POWER
Knob SPEAKER A
Knob SPEAKER B
Knob VOLUME
Knob TONE
Knob SLIDE
Knob PUSH
Knob SLIDE
Knob PUSH
\A(ST-6),Primary fuse <D/W/PX>
»SA-SE-EAK,Primary fuse <G/
W/PX/Q>
REF. NO. PART NO. DESCRIPTION
F903 252075, * 2.5A-SE-EAK,AC outlet fuse <G>
F906 252070 +} 1A-SE-EAK,Secondary fuse <G/Q>
P304 25060044 3X 14mm,Terminal GND
P901 253123, +, AS-UC-6 # 18,Power supply cord
253136, <D/PX
253140 or
253146
253148 or A AS-CEE,Power supply cord <G/
253150 Ww
253118 ‘ AS-SAA,Power supply cord <Q>
P902 25050341 NSCT-4P168T,AC outlet <D/PX>
P902,P903 25050337 & NSCT-2P164,AC outlet <G/W>
2501653, 2SC3856(0),
2201654 or — 2SC3856(Y) or
2201655 2SC3856(P),Power amplifier tran-
sistor
Q523,Q524 2201663, 2SA1492(0),
2201664 or 2SA1492(Y) or
2201665 2SA1492(P),Power amplifier tran-
sistor
$903, 25065123, |, NPS-1258P,Voltage selector
switch <W>
TOOL 2300303 NPT-992D,Power transformer <D>
2300304 4, NPT-992G,Power transformer <G>
2300305 *, NPT-992DG,Power transformer
<w/PX>
2300339 A NPT-992Q,Power transformer <Q>
Ul 1A090576-1 NAAR~-3276-1,FM/AM tuner and
selector circuit pe board ass'y <D>
1A090576-1A_ NAAR~-3276-1A, FM/AM tuner
and selector circuit pe board ass'y
<G/®
1A091576-1B NAAR~-3276-1B, FM/AM tuner
and selector circuit pe board ass’y
<W/PX>
U2 1A090577-1_ NAAF~-3277-1,Power amplifier pe
board ass'y
U3 1A090578-1 = NASW~-3278-1,Speaker switch pe
board ass'y <D/W/PX>
1A090578-1A_ NASW-~-3278-1A, Speaker switch
pe board ass'y <G/Q>
U4 1A090579-1_ NAETC-3279-1,Speaker terminal
pe board ass’y <D>
1A090579-1A_ NAETC-3279-1A, Speaker termi-
nal pe board ass'y <G/W/PX/Q>
REF. NO. PART NO. DESCRIPTION
US 1A090580-1 NAETC-3280-1,Const. voltage cir-
cuit pe board ass'y
U6 1A090581-1_ NADIS-3281-1,Display pe board
ass'y <D>
NADIS-3281-1A, Display pe board
ass'y <G/Q>
NADIS-3281-1B, Display pe board
ass'y <W/PX>
NAAF-3282-1,Volume pc board
ass'y <D>
NAAF-3282-1A, Volume pe board
ass'y <G/W/PX/Q>
NAAF-3283-1,Preamplifier pc
board ass’y <D>
NAAEF-3283-1A, Preamplifier pc
board ass'y <G/W/PX/Q
1A090581-1A
1A091581-1B
U7 1A090582-1
1A090582-1A,
Us 1A090583-1
1A090583-1A,
ug 1A090584-1 = NAAF-3284-1,Switch pce board
ass'y
Ul0 1A090585-1 = NADIS~3285-1,Volume indicator
pe board ass’y
Ul 1A090586-1 = NAETC-3286-1,Video terminal pc
board ass'y <D/PX>
NAETC-3286-1A, Video terminal
pe board ass'y <G/W/Q>
NAPS-~3287-1,Power supply circuit
pe board ass'y <D>
NAPS-3287-1A,Power supply cir-
cuit pe board ass'y <G>
NAPS-3287-1B,Power supply cir-
cuit pe board ass'y <W/PX>
NAPS-3287-1C,Power supply cir-
cuit pe board ass'y <Q?
Equalizer amplifier
<D
Equalizer amplifier
pe board ass'y <G/W/PX/Q
1A090586-1A
Ul2 1A090587-1
1A090587-1A,
1A091587-1B
1A091587-1C.
Ula 1A073554-2
1A086554-3
NOTE: “D>: Only 120V model
<G>: Only 220V model
<W>: Only Wolrdwide model
<PX>: Only PX model
<Q: Only 240V model
NOTE: THE COMPONENTS IDENTIFIED BY MARKA\
ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE ONLY WITH
PART NUMBERS SPECIFIED.

BLOCK DIAGRAM
—120V MODEL—
TUNER SECTION
001
ANTENNA
TERMINAL
[ru001
Teew
FM IF AND
AM RADIO SYSTEM
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STEREO
DECODER
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‘SIGNAL OUT:
REMOTE
CONTROLLER
701
SEGMENT OUT
VCR
RELAY.
Power:
MUTING.
SEL MUTE:
PROTECT
Rioz
SIGNAL,
Cever
MICROPROCESSOR
oisit out
703
FLUORESCENT
TUBE
fae
+24 RLTOL
FL TUBE
SW RELAY
K+
‘c202
HI-BLEND
SWITCH
STEREO.
2206
MUTE
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207
care
circuit
9208
Wore
SWITCH
a ern

AMPLIFIER SECTION
LAYER.
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REGISTOR/LATCH/
LEVEL
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TERMINALS

BLOCK DIAGRAM
—OTHER MODELS —
TUNER SECTION
Poo!
ANTENNA
TERMINAL
eM
Jo101-ai03
750
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FMF ame [FM IN
704
REMOTE
CONTROLLER
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- POWER’
EM IF AND
‘AM RADIO SYSTEM
R102
SIGNAL,
LEVEL
MICROPROCESSOR
SEGMENT OUT
o1GIT OUT
MUTING.
+——— Se. MUTE.
PROTECT.
703
FLUORESCENT
TUBE
-—
ISI
&
AM TUNED
LEVEL
+84 RL7OI
FL TUBE
SW RELAY
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AMPLIFIER SECTION
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CONNECTION
VIEW
OF
MICROPROCESSOR
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‘SYSTEM
STEREO
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STEREO ‘AlpIo Mure
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TO SP TERMINAL
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BLOCK DIAGRAM OF ICS
LC6568H-3643 (MICROPROCESSOR)
Terminal Descriptions
Pin No. Terminal Description
1 DI These are the digit and key scan signal terminals.
2 D2 "H” when active.
3 D3
4 D4
5 D5
6 D6
7 D7
8 D8
9 DISPLAY Display output terminal."H” when active.
10 Ko These are the input terminal for key return signal
u Kl source and diode matrix.”H” when active.
12 K2
13 K3
i sD Auto stop signal input terminal.Auto tuning stops when this terminal becomes the high level.
15 STEREO This is the input terminal for detection of the stereo broadcast.”L” when active.
16 PROTECT, This is the detection terminal for protection circuit.The speaker relay turns off when this terminal
becomes the high level.
Ww POWER OFF | This is the input terminal for detection of the stoppage of electric current."L” when the stoppage
of electric current.
18 RELAY This is the output terminal for control of the speaker relay.”L” when active.
19 SEL MUTE This is the muting output terminal when the selector key is operated.”H” when active.
20 TU MUTE This is the output terminal for muting control of tuner section.”L” when active.
a AUTO/MONO _| This is the AUTO/MONO switching output terminal. “L” when AUTO.
22 VDP These are the output terminal for control of video signal.
23 VCR
24 MUTING This is the output terminal for muting control. “H” when active.
5 POWER This is the output terminal for power source.It is "H” for power on
26 HBON: ‘This is the output terminal for indication of HI-BLEND ON. “L” when active.
aT HB OFF. This is the output terminal for indication of HI-BLEND OFF. “L” when active.
28 DX This is the output terminal for indication of DX. "L” when active.
29 LOCAL This is the output terminal for indication of LOCAL. ”L” when active.
30 TEST Test terminal.Connect to the ground.
31 Vss Ground terminal.
32 Osci Connect to the 4.00MHz ceramic oscillator.
33 osc2
34 RES This is the input terminal for reset. "L” when active
35 PLL Connect to the terminal CE of PLL IC(LM7001).
36 DATA This is the serial data output terminal.Connect to the terminal DATA of PLL IC and terminal DI
of analog switches. (LC7821/LC7823)
37 CLOCK This is the serial clock output terminal.Connect to the terminal CI of PLL IC and terminal CL of
analog switches.
38 SEL Connect to terminal SEL of analog switch(LC7821).
39 SYSTEM IN _| This is the input terminal for system code. "H” when active.
40 SYSTEM OUT | This is the input terminal for system code. "L” when active.
41 MONO This is the output terminal for indication of MONO. "L” when active.
42 AUTO This is the output terminal for indication of AUTO. "L” when active.
43 NRON This is the output terminal for indication of NR ON. “L” when active.
44 NR OFF This is the output terminal for indication of NR OFF. “L” when active.
45 VREF This is the input terminal for comparator reference voltage.
46 SIN This is the signal strength input terminal.
47 vo This is the output terminal for comparator reference voltage.
48 Vi This is the output terminal for comparator reference voltage.
49 v2 This is the output terminal for comparator reference voltage.
50 RF IN This is the input terminal for control of AGC. "H” when active.
31 VP. Pull-down resistor connection terminal of FIP controller/driver.

Pin No. Terminal Description
52 Sa
53 Sb
54 Se
55 Sd These are the output terminal for segment signal.
56 Se “H” when active.
57 Sf
58 Se
39 Sh
60 Si
61 Si
62 Sk
63 SI
64 VDD This is the divice power Source terminal.At the time of operation,the supply is 5V.The internal
data memory(RAM) is maintained by means of the super capacitor.
FM5OK (FM band setting)
FM50K Region Frequency range Channel space Reference frequency IF frequency
1 Europer 87.50 ~108.00MHz | 50kHz 25kHz 10.7MHz
0 USA. 87.9 ~107.9MHz 200kHz 25kHz 10.7MHz
AMS
AM9K Region Frequency range Channel space Reference frequency IF frequency
1 Europer 522 ~ 1611 kHz | 9kHz 9kHz 450kHz
0 USA. 530 ~ 1620 kHz 10kHz 10kHz 450kHz
Connection of fluorescent tube and microprocessor
ANODE CONNECTION
8G(D8) 7G(D7) 6G(D6) | 5G~D5) | 4G(p4) | 3G(D3) | 2G(pD2) | 16(D1)
a SLEEP == a a a a a a
b cb DIRECT b bd b b b b
¢ MEMORY c © ¢ c © ¢
d 11-20 d a 4 4 ad 4
e 110 FM | FM MUTE e e e e e e
¢ | [aupio mure STEREO f f t f f f
8 = AM & g g 8 g &
h | [remonrror OFF = = =. h = h
i - ON i = i = - i
j
-
MIN
j
2
= =
FS
j
k - kHz - - k k - ke
é - MHZ, - = DP - = cH
m PRESET STATION - - - - - - =
nS
Eger
2
iz
= 5 &
5
=
° - SIONALSTRENGTH. - - - - - -
P - = x = es = =
uPA81C (BUFFER)
6 15 14 13 12 n 10
g q ee
RBI
~
RBZ
oe ars ae -
7 2 3 5 6 7
RBI: 20K RI: 20KA RBZ! 2A AZ : 100K

7—BT-95GK (FLUORESCENT TUBE)
8G
|
‘SIGNAL STRENGTH SIGNAL FREQUENCY7INPUT SELECTOR PRESET STATION
[FM MUTE] [ON (OFF[STEREO SLEEP)[CD_DIRECT )[AUDIO MUTE! 1-2 MONITOR MEMORY ][1-10] [11-20]
z Z z
9 fad iad fa fan es
Zz .
ZN a OX ep
7 oP, 7 7
I I T I T T
7 a 5G 4s 36 26 76 IG
(=. oT DATA composition Switch
BS oR!
Bg
les
AO}
A1/A2/
a3}sw)
2}
3}
4]
5]6/7)8
ee LTH] HI) HI 4
Bt Pee ADDRESS 2 a
ey a8 7
! ee 0 5 ne § a 3%
©
RCOM2
<<a
[a
a
ja ja
4
| FF oO lo 6 lo lo a
Bt ee
Be tr The source becomes ON when the bit of switch becomes
© RCOMS high
—pe—leer ,
! RCOM4-
| ot
des
Pin No. | Terminal Description Pin No. | Terminal Description
11) | TAPE2 REC 16 | Vss Ground terminal.
2(L2) | TAPE 2PB ;
3 LCOM1 17 s Selector terminal.
4(L3) | CD-D f oe 18 | RES Reset terminal. When power is turned
5(L4) | CD-D Input/output terminals of audio signal ON, the condition of the analog switch
6 LCOM 2 obleft charac]: , is not determined, but when this ter-
705)
|
CD-D
Control
to
the
inside
analog
switch
at
final
la
"L"
all
abalog
switches
ae
8a | CD the serial data. See.
9 , Lcom 3 19 Power supply terminal. (+15V)
1047) | DD _
1 LCOM4 20 aR
[12 VEE Negative power supply terminal. } 22
(-15V) 23 (R6) inpuiioutoearainal skeudieeandl
13 CE Chip enable terminal. Connect to SEL |) 24 (RS) mput/autput terminals of sudio'signal
terminal of LC6568H-3643, 25 Of sieht channel.
: 26 (R4) Control to the inside analog switch at
14 | DL Serial data input terminal. Connect to |) 95 (R3) | the serial data.
DATA terminal of LC6868H-3643. 3 i
5 [cL Serial clock input terminal. Connect to || 29 (R2)
CLOCK terminal of LC6868H-3643. | 30 (R1) | TAPE 2 REC

ne
ADJUSTMENT PROCEDURES
Preparation
©
Standard
knob
position
@
Input
TAPE
MONITOR
.
SOURCE
FM
mono:
1kHz,
75kHz
devi.,
60dB/uV
VOLUME
...
ers
.
Maximum
FM
stereo:
1kHz,
L+R
67.5kHz
devi.:
Pilot
signal
19kHz
BASS/TREBLE/BALANCE
....
-..,.
Center
7 SkHz devi. VCR:2 MODE: 30-434 ya. Rote haw wt STEREO
AM: 400Hz, 30% mod., Set.
© Output . OFF
Connect the non-inductive type resistor of 8 ohms to the DYNAMIC BASS EXPANDER .... .. OFF
speaker terminal A of left and right channels unless other- STEREO IMAGE EXPANDER .... .. OFF
wise noted. SELECTIVE TONE CONTROL ... . OFF
Amplifier section
1. Idling current adjustment
Connect the DC voltmeter to the terminals [1D and VCT on
the power amplifier pc board.
Adjust the semi-fixed resistors R533 and R534 so that the
indication of voltmeter is 7.5 + 1.5mV.
Notes: VOLUME ............ Maximum, Open load,
Adjust after switching on for 5 minutes.
Power amplifier pc board

| section
Connection Stereo modu- | Turning : - 7
Item
Step
|
otinstrument
Ierortinpel
|
slal
aey
Output
indicator
Adjustment
|
Adjust
for
Remarks
unr
u DC voltmeter 101 OV = 20mV Mode switsh: MONO Le T | otstoarion
il Bone Repeat the steps 1 pve jawarzen
1F 2 | Fig.1 kHz, 75kHz devi. 99.1MHz | AC voltmeter a a ii Maximum and 3 until no Tea I
tent ens further adjustment ac
2) Distortion analyzer 1102 Minimum is necessary | eee ‘VOUTMETER
= Fe
1 r7zapeazdsy — | ER: Ake Light on Tes
Stereo
Exh
modulation
;
Mode
switch:
Hwa
couNrEn
sister
ioe
Fig.
3
99.1MHz
|
Stereo
indicator
R101
STEREO
GuNtRATOR
z
2
16.24BE
(114B)
Light
off
‘Use
the
high
impedance
probe,
(10:1)
Ext. modulation | 7.5kHz devi. Fer
EXT. MODE OUT,
vco Fig. 2 kHz, 7SkHz devi. 99.1MHz | Frequency counter R201 19kHz + LOHz rete ok 3 { unit oT] pisroarion
ant
Re es sek TERMINAL,
tum more
Fig. 3 Lor Reh. LkHz | 99.1MHz | Distortion analyzer on Minimum “ : ac
Sear font nd whan #18" wer [SSemvereat | foutscrcor
Sites 1 Re osname LR AC tomate a Minimum Mace cal
gti [er Ext. modulation Leh. AC voltmeter Minimum seen penton
TPS
-blend
level
Fig.
3
35.2dBF
(30dB)
99.1MHz
|
Hi-blend
indicator
R102
Light
off
Ae
kHz, 7SkHz devi.
f
section
Reference
specifications
2)
~——————
FM Tuned voltage 87.9MHz 2.0 +0.5V = 5
tep AMSG. Adjust for 107.9MHz 7.7 +0.5V 1
output frequency (120 model)
87.5MHz 2.0 +0.5V c
S30kHz
Tuoo!
OMHz 7.7 +0.5V
1 [522kH42] 13V 201 ios: one Sassy 2
<S31kH2
‘
1s!
S00KH2(603KH2) coo yr, corgen - : ae oe Gan
2 | 400H230% mod. | ostttay Maximum .
604B/m AM Tuned voltage S30kHz 13+05V
1620kHz 8.0+05V
1000kHz (120V model)
(999kH2)
1000kHz
zi
S22kHz
13+
05V
iis
3
|
40082
30%
mod.
|
(999KHz)
Maxine
1611kHz
8.02
05V
[e]uio
604B/m
(Other
models)
oe
100k RIO
«|
samearatove
|
1008
Liston
oo
@®
12 Ris! Garo
vat
IERATOR
‘606m =|
aN
‘oor
ant
[J+ 10kHz step model
(>: Wmodet
(2 9kHz step model
FM/AM tuner and
selector switch pe

DISPLAY PC BOARD
PRINTED CIRCUIT BOARD-PARTS LIST
DISPLAY PC BOARD(NADIS-3281-1/1A/1B)
CIRCUIT NO.
U701
Q701
Q704
Qi02
Q705
Q703
Q706
D702-D715
D716,D717
D718,D720
D719
D720
D733-D735
D721,D723
D725,D727
D729-D731
D722,D724
D726,D728
D732
X701
PART NO. DESCRIPTION
ICs
24130001 GP1US01S
22240153 LC6568H -3643-
22240150 LC6527C-3608
Transistors
2211255 or 2SC1815(GR) or
2210746 2SC945A(P)
2211455 or — 2SA1015(GR) or
2210803 2SA733(P)
Fluorescent tube
212054 7-BT-95GK
Lamp
2100644. 6.3V,0.25A
Diodes
223163 1$5133
223163 188133 <G/W>
224650822, 05AZ8.2Y,
224150822 or HZ8.2EB2 or
224450822 MTZ8.2B
223163 1SS133
224150562 or 05AZ5.6Y or
224650562 HZ5.6EB2
223163 18$133
L.E.Ds
225137CG, SEL2413ECG,
225137DG or SEL2413EDG or
224137DY SEL2413EDY
225142 SEL2913K
225142 SEL2913K
225141 SEL2213C
Osc. elements
3010099 CSA4.00MG,Ceramic
X702 3010119
Capacitors
C702 3020027 or
3000051
C704 354780109
C707,C715, 354782299
C708 354741009
Resistors
R710 49163473404
R734,R735 49163104404
Switches
S701-S724 25035548
S725 25065286
Relay
RL701 25065298
Holder
27190643A
TX-850
CSB-1000D,Ceramic
0.047F,5.5V or
0.047F,5.5V Super
1 wF50V Elect.
0.22uF,50V Elect.
10¢F 16V Elect.
47kohm x4, 1/10W,Network
100kohm x4, 1/10W,Network
NPS-111-S510
NSS-22112,Band <W>
NRL-1P1A-DC12-40
LED
SPEAKER SWITCH PC BOARD(NASW-3278-1/1A)
CIRCUIT NO, PART NO.
R549,R550 442520474
R551,R552 441623914
$502,S503 25035517
P503 25045187
25045139
DESCRIPTION
4.7ohm,1/2W,Metal oxide film
resistors
3900hm,1W,Metal oxide film resis-
tors
NPS-~222-L479,Push switch
HLJ-0541-01-010,Stereo headphone
terminal <D/W>
HLJ-0540-01-010,Stereo headphone
terminal <G>

PREAMPLIFIER PC BOARD(NAAF-3283-1/1A)
CIRCUIT NO.
Q352
Q353
Q851
Q853
D351
D352,D353
C359,C360
C363,C364
C367,C368
€373,C374
C375-C378
C389
€390,C392
C393,C851
R371,R372
R379,R380
R451
S354
PART NO.
ICs
222579 or
222570
222465.
Transistors
2212600
221281
Diodes
224650623 or
224150623
223163
Capacitors
354780229
354741009
352983396
354780229
354781099
354780229
354781099
354780339
Resistors
5104216
5104216
5104225
Switch
25035590
DESCRIPTION
NJM4560D or
NJM4560DX_
NJM4558D.
DTAIL24ES.
DTCI4YS.
HZ6.2EB3 or
05AZ6.2Z
1SS133
2.2 wF,50V Elect.
10uF.16V Elect.
0.334F,50V,Non-polar elect.
22 wF.S0V Elect.
0.1 wF50V Elect.
2.2 wF,50V Elect.
0.1 wF,50V Elect.
3.3 4F,50V,Elect.
N14RLCS0KC22Z, Variable,Bass
NI4RLC50KC22Z, Variable,Treble
N1IRGLC250KW22Z, Variable,Bal-
ance
NPS-122-L552
SPEAKER TERMINAL PC BOARD(NAETC-3279-1/1A)
CIRCUIT NO.
P501,P502
PART NO.
25060110
DESCRIPTION
NTM-4PDMN44,Speaker termi-
nals
SPEAKER SWITCH PC BOARD
NOTE: «D>: Only 120V model
<G>: Only 220V/240V models
<W>: Only Worldwide model

u |
6
7
|
SCHEMATIC
DIAGRAM
-
TUNER
SECTION
—
-
120V
MODEL
—
708 7-87-95cK
ONKYO CORPORATION

1 | 2 3 4 5 6 I 7
SCHEMATIC DIAGRAM
- AMPLIFIER SECTION —
- 120V MODEL —
EU wow were
PHONO
co
‘ nec
E
Thee
: 7
i PLAY
Ho secriaw
e REC
TAPE-2
PLAY
earn
Bae cee
voR be eae: sea
2S ete
= a
ten | S12
i tee
a
; 2 aS pi
eet et
ONKYO CORPORATIO

PRINTED CIRCUIT BOARD-PARTS LIST
FM/AM TUNER AND SELECTOR CIRCUIT PC BOARD(NAAR
-3276-1/1A/1B)
CIRCUIT NO.
TUOOL
Quod
Q201
Q301
Q302
Q7ai
Qu01
Q102
Qu03
Q105
Q106,Q207
Q202-Q204
Q205,Q206
Q303,Q304
Q451,Q452
Q501,Q502
Q503-Q506.
Q507-Q510
Q511,Q512
Q313,Q514
Q732
Q733,Q801
Q802,Q892
Q881,Q891
Q903
Q951,Q971
Q972
Q952
Q953
D101,D102
D801-D804
D881
D891
D91
D902,D903.
D904
D905
DgO8
D951
D971,D972
L101
L102
L152
PART NO.
Front end
240070
2 8
22240079
22240158
22240090
Transistors
22121
2211354
223132
223163
224651001 or
224151001
223163
223880 or
223896
224153001 or
224653001
223163
224650623 or
224150623
Transformers
89
233390,
232139
DESCRIPTION
TFFGIUL6A <D>
TFFG3E <G/W>
LA1266
#PCI1I6IC3
LC7821
LC7823
LM7001
2SK24(GR) <G/W>
2SC1923(0)
2SC1923(0) <G/W>
2SC1815(GR) or
2SC945A(P)
2SA1015(GR)
2SK246(GR)
2SD653(E) or
2SD1468(R)
2SC1815(GR) or
2SCH5A(P)
2SC2878(A) or
25C2878(B)
2SC225KO-001) or
28C2259(0-002)
2SA1015(GR)
2$C€2229(0) or
2S8C2229(Y)
K108(D)
2SA1015(GR)
2SA949(0) or
2SA9IHY)
2SC1815(GR) or
2SCH45A(P)
2SA965(0) or
2SA965(Y)
2SA992(F) or
2SA992(E)
1K60
1$$133
HZ10EB1 or
035AZ10X
1$$133
KBU4D
05ZA13X or
HZ13EB1
WLO1 or
WOIRL
GP101N4003 or
1N4003F
05AZ30X or
HZ30EBL
1SS133
HZ6.2EB3 or
05AZ6.2Z
NFIF- 4066
NFIF-4067
NMIF-4062
CIRCUIT NO.
L103
L104
1201,L202
L801
Lisl
‘X101,X102
‘X101-X103
X11
X152
‘X731
COOL
C105
C106
C110
cll
chié
C151
C204
€207,C208
€209,C210
C910,C911
CI2
CAT
C918
C919
Col,
Cc
R11
R102
R151
R201
R202
R339,R340
R529,R530
R531,R532
PART NO.
Coils
233383
233105
233355A,
231081 or
233031
RF block
232148
DESCRIPTION
NMC-6070 <G/W>
NCH~-1005
NMC-4059
NCH-2129 or
NMC-9-1
NMRF-7050,
Ceramic filters
3010071
3010137
3010123
3010076
Xtal
3010073
Capacitors
354741009
354742209
354784799
354741019
354780109
354780229
354780339
354741009
354780479
354741009
354782299
354742209
354744719
354741009
354780229
354782299
354780109
354780339
370134714
354784799
354780339
354781009
354722219
354790479
354721019
354780479
354782299
354784799
354780229
354780109
335251039A
3504224
354761019
354744719
335251039A
354764709
354761019
354741009
354761019
5210064
5210062
49163105404
442522704
442529104
SFE10.7MA5 (RED) <D>
SFE10.7MMK <G/W>
SFZ450JL.
BFU450C
XTL-7.2M
10¢F.16V Elect.
22 uF ,16V Elect.
0.474 F SOV Elect.
100 wF16V Elect.
1 wF50V Elect.
2.2 wF.50V Elect.
3.3 nF SOV Elect.
10uF16V Elect.
4.7 xF SOV Elect.
104 F.16V Elect.
0.22zF SOV Elect.
22 F 16V Elect.
470 2 F,16V Elect.
10xF 16V Elect.
22 uF SOV Elect
F,50V Elect.
1 #F50V Elect.
33 wF.S0V Elect
470pF_ +£5%,100V,APS
0.47pF,50V Elect.
2.2 wFS0V Elect.
33 pF,50V Elect.
10uF,50V Elect.
220 pF, 6.3V Elect.
4.7 nF, 100V Elect.
100 wF, 6.3V Elect.
4.7 wF50V Elect.
0.22yF SOV Elect.
0.47 uF SOV Elect.
22 wF\50V Elect.
1 wF50V Elect.
0.01 F 300V Ceramic
10000 zF.56V Elect.
100 #F,35V Elect.
470 2F,16V Elect
0.014 F.500V Ceramic
47F 35V Elect.
2200, F 33V Elect
100 2F,35V Elect.
10¢F 16V Elect
100 zF.35V Elect.
NO6HR33KBD,Semi-fixed
NO6HR220KBD,Semi-fixed
NO6HRI1OKBD,Semi-fixed
NO6HR4.7KBD,Semi-fixed
N06HR220KBD,Semi-fixed
IMohm *4,1/10W,Network
27ohm,1/2W,Metal oxide film
9lohm,1/2W,Metal oxide film