Onkyo A-8150 User manual

ONKYO
A-8150
SERIAL NO. 3268
SERVICE MANUAL
Integrated Stereo Amplifier
MODEL A-81S0
UD
120V AC, 60Hz
UG 220V AC, 50Hz
UQ 240V AC. 50Hz
UW
120V/220V AC, SO/60Hz
SAFETY -RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !;).. ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO PARTS
WHOSE PARTS NUMBERS APPEAR AS SHOWN IN THIS
MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE MEA-
SUREMENTS TO DETERMINE THAT EXPOSED PARTS
ARE ACCEPT ABLY INSULATED FROM THE SUPPLY
CIRCUIT BEFORE RETURNING THE APPLIANCE TO
THE CUSTOMER.
TABLE OF CONTENTS
Item Page
Specifica tions 2
Precautions 2
Block diagram 3
Adjustment procedures 4
Front panel facilities 4
Chassis exploded view 5
Exploded view parts list 6
System connections 6
Printed circuit board parts list 7
Schematic diagram 9, 13
Packing procedures 11
Printed circuit board view 12
iONKYO·
AUDIO COMPONENTS
-1-

A-8150
SPECIFICA TIONS
Power Output:
Total Harmonic Distortion
IM Distortion
Damping Factor:
Frequency and Response:
Sensitivity and Impedance
Phono Overload:
Bass Control:
Treble Control:
Signal to Noise Ratio:
Loudness Control:
Muting:
Selective Tone Control
General
Power Supply:
Dimensions (W x H x D):
Weight:
PRECAUTIONS
60 watts per channel, min, RMS, at
8 ohms, both channels driven from
20 Hz to 20 kHz, with no more than
0.06% THO.
0.06% at 60 watts
0.06% at 60 watts
40 at 8 ohms
15 -30,000 Hz ± 1 dB
Phono (MM): 2.5 mV/50 kohms
Phono (MC): 350 ~V/330 ohms
Tuner/CD/AUX: !.§Q...wV/50 kohms
Tape/Play: ~V/50 kohms
Tape/Rec: ~V/4.5 kohms (phono)
150 mV RMS at 1 kHz, 0.06% THO (MM)
± 10 dB at 100 Hz
±10 dB at 10,000 Hz
Phono: 83 dB (IHF A), 5 mV input
CD & Tape: 95 dB (IHF A)
+7 dB at 70 Hz/+5 dB at 10 kHz
-20 dB
±15 dB at 50 Hz/±6 dB at 10kHz
European models: AC220V, 50Hz
Canadian models: AC120V, 60Hz
British & Australian models:
AC240V, 50Hz
Worldwide models: AC120V and 220V
switchable, 50/60 Hz
435 x 110 x 272 mm
17-1/8" x 4-5/16" x 10-11/16"
7.0 kg, 15.4 Ibs.
1. Replacing the fuses
For continued protection against risk fire, replace only with same type and same rating fuse.
CIRCUIT NO.
F901
F902
PART NO.
252050
252075 or
252075CC
252078 or
252078CC
F911,F912
DESCRIPTION
5A(ST-6), Primary fuse 020V model)
2.5A-SE·EAK Primary fuse (220V, 240V, 120V/220V model)
2.5A-SE-EAK Primary fuse (220V, 240V, 120V/220V model)
5A-SE-EAK, Secondary fuse (220V, 240V model)
5A-SE-EAK, Secondary fuse (220V, 240V model)
2. Insulation resistance mesurement (Only U.S.A. model)
Connect the insulating-resistance tester between the plug of power supply cable and the terminal GND on the back panel.
Specifications; More than 10 MD at 500V.
3. Voltage selector (rear panel)
Worldwide models are equipped with a voltage selector to conform with local power supplies. Be sure to set this switch
to match the voltage of the power supply in your area before turning the power switch on. Voltage is changed by sliding
the groove in the switch with a screwdriver or similar instrument to the right or left position. Confirm that the switch has
been moved all the way to the right or left before turning the power switch on. If there is no voltage selector switch
on the unit you have purchased, it can only be used in areas where the power supply voltage is the same as that of the
unit.
220V~ 120V~ 120V~ 220V~
at AC 120V at AC 220V
-2-

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A- 50
ADJUSTMENT PROCEDURES
1. Preparations
1) Leave the machine in a normal condition parallel to the work bench, maintaining a clearance of 15mm from the
bottom for air circulation.
2) Set the level to minimum with no load and no signal.
3) When making the adjustment, there must be no breeze blowing from the outside.
2. Adjustment of idling current
1) Turn ON the power switch, and leave the unit as is for about 5 minutes.
2) Adjust the semi-fixed resistor R513 (R613) so that the voltage between the terminals VCTand lID of the printed circuit
board NAAF-2956 is 7.5mV.
3. Operating check of protection circuit
1) When the power switch is turned ON.
• After about 6 second, relay RL501 of the NAAF-2956 printed circuit board go ON.
• Operation indicator lights.
2) When the power is turned OFF.
• Immediately a relay go OFF.
3) With no load, when 1.5V DC is input, the speaker relay go OFF.
Caution: During this test, there should be absolutely no load connected and the load terminals must not be shorted.
FRONT PANEL FACILITIES
:"~r,
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• 36
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1. Power switch and Operation indicator (POWER and OPERATION)
2. Speaker selector (SPEAKERS) OFF, A, B, A+B
3. Headphone jack (PHONES)
4. Bass control/Selective Tone control (BASS/SEL-TONE)
5. Treble control (TREBLE)
6. Balance control (BALANCE)
7. Audio muting (MUTING)
8. Cartridge selector (CARTRIDGE) MM, MC
9. Tape monitor switches and indicators (MONITOR) TAPE-l/DAT, TAPE-2
10. InPft selector switches and indicators (INPUT SELECTOR) CD DIRECT, CD, PHONO, TUNER, AUX, TAPE-l/DAT,
TAPE-2
11. Volume control (VOLUME)
12. Loudness control (LOUDNESS) ON/OFF
13. Selective tone switch (BASS/SEL-TONE) and Selective tone indicator (SELECTIVE TONE) BASS, SEL-TONE
-4-

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A-8150
-5-

--
CHASSIS-EXPLODED VIEW PARTS LIST
REF. NO.
Al
A2
A3
A4
A6
A7
A7
A7
A7
A8
A9
Al2
A31
A32
A35
A6l
A62
A63
A64
A68
Q509, Q609
Q510, Q610
~ S901
~S902
~C901
A P901
A P901
AP901
A P901
~
P902
F901
F902
F911, F912
PART NO.
27110360A
27130471
27130472
27160204
27100130A
27120989
27120990
27120992
27121013
27141124
27300750
272730703
28184361A
834430088
lA021121
28322795A
28323022
28323024
28323026A
27175142
2201703 or
2201704 or
2201706
2201693 or
2201694 or
2201696
25035398
25065123
3500065A
253123 or
253136 or
253140 or
253146
253130A or
253128B
253118
253104 or
253105 or
728320 or
728328
25050293
252050
252075 or
252075CC
252078 or
DESCRIPTION
FRONT BRACKET
BRACKET (PT)
BRACKET (H)
HEATSINK
CHASSIS
BACK PANEL
BACK PANEL [G]
BACK PANEL [W)
BACK PANEL [A) [B)
BRACKET (POW)
BUSHING (CORD)
JOINT AS
TOP COVER
TAP-TIGHT SCREW 3TTS+8BBC
FRONT PANEL
KNOB (POW)
KNOB (VOL)
KNOB (TONE)
KNOB (PUSH)
LEG
2SC3855-0 or
2SC3855-Y or
2SC3855-P
2SA1491-0 or
2SA1491-Yor
2SA1491-P
POWER SWITCH, NPS-111-L362P
SLIDE SWITCH, NSS-1258P [W)
O.OlIlF, AC400V/125V
AC CORD AS-UC6-#18
AC CORD AS-UC6-#18
AC CORD AS-UC6-#18
AC CORD AS-UC6-#18
AC CORD AS-CEE or [G) [WI
AC CORD AS-CEE [G) [W)
AC CORD AS-SAA [A]
AC CORD C2.5BS2 or [B]
ACCORD C2.5BS2 or [B]
2-0.7511SI6 BLK/GRY or [B]
2-0.753S16 llLK/GRY [B]
AC OUTLET NSCT-6P120
FUSE 5A ST-6
FUSE 2.5A-SE-EAK or [G)[W)[Aj[B)
FUSE 2.5A-SE-EAK [G)[W)[A)[B]
FUSE 5A-SE-EAK or [G)[AJ[ B)
SYSTEM CONNECTIONS
F901a
F902a
PI
Ap2
~T901
AT901
AT901
~T901
U1
U1
U2
U2
U3
U4
U4
U4
U5
U6
NOTE:
FUSE 5A-SE-EAK [GJ[ All B]
FUSE HOLDER
YSH403T, FUSE HOLDER
[G][W][AJ[B]
TERMINAL (GROUND)
TERMINAL (POWER SUPPLY)
(G](W][Aj[B]
NPT-957D, POWER TRANSFORMER
NPT-957G, POWER TRANS-
FORMER [G)
NPT-957DG, POWER TRANS-
FORMER[W]
NPT-957Q, POWER TRANS-
FORMER[A)[B]
NAAF-2956-1, MAIN CIRCUIT PC
BOARD ASS'Y
NAAF-2956-1A, MAIN CIRCUIT
PC BOARD ASS'Y [G)[AII B]
NAETC-2957-1, EQUALIZER &
TONE CONTROLE CIRCUIT PC
BOARD ASS'Y
NAETC-2957-1A, EQUALIZER &
TONE CONTROLE CIRCUIT PC
BOARD ASS'Y [G][A)[B]
NASW-2958-1. SPEAKER SWITCH
CIRCUIT PC BOARD ASS'Y
NAPS-2959-1, POWER SWITCH
CIRCUIT PC BOARD ASS'Y
NAPS-2959-1A, POWER SWITCH
CIRCUIT PC BOARD ASS'Y [GliAl[ B]
NAPS-2959-1B, POWER SWITCH CIRCUIT
PC BOARD ASS'Y [WI
NADIS-2960-1, DISPLAY LED PC
BOARD ASS'Y
NADIS-2961-1, DISPLAY LED PC
BOARD ASS'Y
IN): Only U.S.A. model
[A]: Only Australian model
[B): Only British model
[G): Only 220V model
[W): Only 120V/220V model
252078CC
250113
25050065
25060044
25060092
2300211
2300212
2300213
2300238
1A022556-1
1A022556-1A
lA022557-1
lA022557-1A
lA022558-1
lA022559-1
lA022559-1A
1A022559-1B
lA022560-1
1A022561-1
NOTE: THE COMPONENT IDENTIFIED BY MARK A
ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE ONLY WITH
PARTS NUMBER SPECIFIED.
4··~i
----.
-6-
u.S A and Canada

PRINTED CIRCUIT BOARD - PARTS LIST
MAIN PC BOARD (NAAF-2956-1, NAAF-2956-1A)
PARTS LIST
CIRCUIT NO. PART NO. DESCRIPTION
ICs
Q701 222584 TA7317P R523, R623 442520824F 8.2n, 1/2W, Metal oxide film
Transistors R531 442525634F 56kn, 1/2W, Metal oxide film
Q501,Q601 2211371 or 2SC2259 0-001 or R547, R647 441622204F 22n, 1W, Metal oxide film
2211372 2SC2259 0-002 R701 442521324F 1.3kn, 1/2W, Metal oxide film
Q502, Q602 2211455 or 2SAI015 GR or R702 441521524F
i.skn, 1/2W, Metal oxide film
2210803 2SA733 P R703 442521834F 18 kn, 1/2W, Metal oxide film
Q503, Q541 2211732 or 2SC1845 For R704 442521534F 15 kn, 1/2W, Metal oxide film
Q603, Q641 2211733 2SC1845 E R911, R912 441625614F 560n, 1W, Metal oxide film
Q504, Q604 2211353 or 2SA949 0 or R913, R914 441625114F 510n, lW, Metal oxide film
2211354 2SA949 Y R915 442520104F In, 1/2W, Metal oxide film
Q505, Q605 22116330r 2SC22290 R916 442525634F 56kn, 1/2W, Metal oxide film
2211634 2SC2229 Y R951-R954 441623024F 3Kn, 1W, Metal oxide film
Q506, Q606 2211255 or 2SC1815 GR R961
2210746 2SC945A P Relay
Q507, Q607 22126530r 2SC3421 0 or
2212654 2SC3421 Y RL501 25065134 NRL-2P5 A-DC24-07
Q508, Q608 2212643 or 2SA1358 0 or Terminals
2212644 2SA1358 Y P321 ~o.45)}J_ NPJ-4PDBL-65
Q542 2211792 or 2SA992 F or P322, P323 25045213 NPJ-6PDBL-92
2211793 2SA992 E P501 25060093 NTM-8P-DML34, Speaker
Diodes P501 25060094 NTM-8P-DML35, Speaker (Gl (Ql
D501, D601 4000068 YD1222 Switches
D502,D503 223163 ISS133 S321-S327 25035562 NPS-162-642-L524
D701 Fuse holder
D911-D916 223897F or P300DL or F911a,F912a 25050065 YSH403T [G] [Q]
22380003F IN5402F
D917, D918 2239672 or RD15EB2 or EQUALIZER
& TONE CONTROlE CIRCUIT PC BOARD
2243252 MTZ15B (NAETC-2957-1, NAETC-2957-1A) PARTS LIST
D919- D921 223880F or GPI0IN4003 or
223896F IN4003F CIRCUIT NO. PART NO. DESCRIPTION
Coils ICs
L321, L421 231074 NCH-0122 Q301, Q401, 22240050 IlPC4570C
Capacitors Q361, Q461,
C331 379122235 0.022IlF, SOY, FILM (DEW) Q371, Q471
C501, C601 354780229 2.2IlF, SOY, Elect. Diodes
C502, C509 354721019 1001lF, 6.3Y, Elect. D961 225137CG or SEL2413E-CG, LED
C602,C609 225137DG or SEL2413E-DG, LED
C514,C614 371121044 O.IIlF, SOY,Mylar 225137DY SEL2413E-DY, LED
C515, C615 371124734 0.047IlF, 50Y, Mylar 0962 225142 SEL2913K, LED
C523,C524 354780339 3.3IlF, SOY, Elect. Coils
C623, C624 L301, L401 231030 NCH-I070
C527 354724719 4701lF, 6.3Y, Elect.
C547,C647 354783319 3301lF, SOY, Elect. Capacitors
C701 354782209 221lF, SOY, Elect. C301, C361, 354780479 4.7IlF, SOY, Elect.
C702 354784799 0.47IlF, 50Y, Elect. C362, C401,
C704 354744709 471lF, 16Y, Elect. C461, C462
C912,C913 3504206 100001lF, SOY, Elect. C302,C402 354743319 3301lF, 16Y, Elect.
C914, C915 354761019 1001lF, 35Y, Elect. C303,C403 371122225 2200pF, SOY, Mylar
C916, C917 354742219 2201lF, 16Y, Elect. C306,C406 371126825 6800pF, 50Y, Mylar
C918 354780109 IIlF, SOY, Elect. C307, C407 371122234 0.022IlF, 50Y, Mylar
C919 354782219 2201lF, SOY, Elect. C308, C408 354780229 2.2IlF, SOY, Elect.
C309, C310 354742219 2201lF, 16Y, Elect.
Resistors C309, C310 391242217 2201lF, 16Y, Elect.(MUSE)
R511, R512 442529104F 91n, 1/2W, Metal oxide film [G] [Q]
R611, R612 C356, C456 371123934 0.039IlF, SOY, Mylar
R513, R613 5210064 N06HRI0KBD, Semi-fixed C365, C366, 354780339 3.3IlF, SOY, Elect.
variable C371,C378,
R516,R616 442522714F 270n, 1/2W, Metal oxide film C379, C471
R519, R619 441720104F In, 2W, Metal oxide film C372, C472 354780109 IIlF, SOY, Elect.
R520, R521 4000080 0.47n, 5W, Metal plate C373,C473 371123934 0.039IlF, SOY, Mylar
R620, R621 C374,C474 371128224 8200pF, SOY, Mylar
C381,C481 371121834 0.018IlF, SOY, Mylar
-7-

A-8150
Resistors
R381, (R481) 5104174
R382 5104192
R383, (R483) 5104196
R387, (R487)
N16RGH100KBT20, Variable
N16RHC250KW25Z, Variable
N16RGHClOOKWT25Z, Variable
Switch
S301, (S351) 25035561
S352 25035537
S371 25035560
NPS-122-162-L523
NPS-122-L499
NPS-162-L522
Sockets
P301,P304 2000557 NSAS-6P513
Holder
27190529 (LED-2)
SPEAKER SWITCH CIRCUIT PC BOARD (NASW-2958-1)
PARTS LIST
CIRCUIT NO. PART NO. DESCRIPTION
Coils
L551, L651 231001S S-1.3B
Resistors
R551, R651 441620684F 6.8n, 1W, Metal oxide film
R552, R652 441623914F 390n, 1W, Metal oxide film
Switch
S551 25030290 NRSF-144-25SS
Terminal
P551 25045164 HLJ-4317-01-3020, Phones
POWER SWITCH PC BOARD (NAPS-2959-1, NAPS-2959-1A,
NAPS-2959-1B) PARTS LIST
CIRCUIT NO. PART NO. DESCRIPTION
Capacitor
C901 3500065A O.DlJ.lF,AC400V!125V
Terminal
P2 25060092 NTM-1S33 [G]
[Q] [W]
Switch
S901 25035398 NPS-111-L362P
Fuseholder
F901a 250113 SN5051
F902a 25050065 YSH403T [G]
[Q] [W]
Label
29360626-1 (Fuse)
DISPLAY LED PC BOARD (NADIS-2960-1) PARTS LIST
CIRCUIT NO. PART NO. DESCRIPTION
Diodes
0951,0952 225137CG or SEL2413ECG or
225137DG or SEL2413EOG or
2251370Y SEL2413EOY
0953, D954 225142 SEL2913K
Holder
27190530 (LEO-4)
CIRCUIT NO. PART NO.
DISPLAY LED PC BOARD (NADIS-2961-1) PARTS LIST
DESCRIPTION
Diodes
0955-0958 225137CG or
2251370G or
2251370Y
Holder
27190530
SEL24l3ECG or
SEL2413EOG or
SEL24l3EOY
(LED-4)
NOTE [G]: Only 220V Model
[Q]: Only 240V Model
[W]: Only 120V!220V Model
-8-

PACKING PROCEDURES
D
- - - - - -1)
~~,-=-c:..-.::.;--:_::.-~
REF. NO.
A851
A852
A853
A854
A855
A856
A858
A880
D
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I
PART NO. DESCRIPTION
29051521 MASTER CARTON BOX
29090987 PAD, LEFT
29090988 PAD, RIGHT
29095012-1 PROTECTION SHEET
260012 DAMPLON TAPE
282301 SEALING HOOK
29100063 750X580, POLY BAG
ACCESSARY BAG ASS'Y
29341148 INSTRUCTION MANUAL
29341149 INSTRUCTION MANUAL [G] [WI [Q]
29341158 INSTRUCTION MANUAL, I [G] [WI
29365019 WARRANTY CARD [U]
29358002E SERVICE STATION LIST [U]
29100006A 350X250, POLY BAG
25055018 CV-K-l, CONVERSION PLUG [WI
NOTE [U] : ONLY U.S.A- MODEL
[G]: ONLY 220V MODEL
[Q]: ONLY 240V MODEL
[WJ: ONLY 120V/220V MODEL
-11 -
A-8150