ONKYO A-65 SERVICE MANUAL

Page 1

A - 65

ONKYO ® SERVICE MANUAL

SUPER SERVO INTEGRATED STEREO AMPLIFIER MODEL A-65

Item	Page
Specifications	2
Block diagram	2
Precautions	4
Circuit description	4
Component location	6
Exploded view	7
Parts list	7
Printed circuit board-parts list	9
Schematic diagram	11
Printed circuit board view from component side	13
Main amplifier adjustment	18
Packing procedures	19

Page 2

SPECIFICATIONS

Power Output:	100 watts per	channel min. RMS,	High Cut Filter:	6 kHz (6 dB/oct.)
-	at 8 ohms bot	h channels driven.	Subsonic Filter:	15 Hz (6 dB/oct.)
	from 20 Hz to	20 kHz. with no	Muting:	-20 dB
	more than 0.0	15%THD.	Loudness:	+7 dB at 70 Hz
Total Hamonic Distortion:	0.015% at rate	ed nower		+5 dB at 10 kHz
IM Distortion	0.015% at rate	ed nower	MAIN Output	1.5V (600 ohms)
Damping Factor:	50 at 8 ohms		in mit output.
Frequency Response	2 50 000 H	z + 1 dB	Conoral
RIAA Deviation (MM)	2 - 30,000 11	Z + 1 0D Jz + 0 2 dB	Semiconductors:	& ICs 51 transistors 33 diades
Sensitivity and Impedance:	20 - 20,000 I Phone (MM):	12 ± 0.2 uD 2 5mV/50kohms	Semiconductors.	26 LEDo
Sensitivity and impedance.		2.5mV/30komms	Dimansional	20 LEDS 419(W) × 151(H) × 402(D)mm
	(MC).	550μ V / 550011118	Dimensions.	16 1/20 5 15/160 15 12/160
	Tuner:		XX7. 1 4	10-1/2 × 3-13/10 × 13-13/10
	Tape Play:	150mV/SUKOnms		15.5 kg, (34.2 lbs.)
	Tape Rec:	150mv/1konms	Power Supply:	AC 220 volts, 50 Hz, (G model)
		(phono)		AC 120 volts, 60 Hz (D model)
Phono Overload:	250mV RMS :	at IkHz, 0.015%
	THD.		Empoifications and facture
Bass Control:	±8dB at 70 Hz	Z	Specifications and feature	es are subject to change without notice.
Treble Control:	±8 dB at 10,00	DO Hz
Signal to Noise Ratio:	Phono (MM):	80dB (IHF A-202,
		5mV input,
		1 watt output)
	(MC):	68dB (IHF A-202,
		0.5mV input,
		1 watt output)
	Tuner & Tape	:85dB (IHF A-202.
		0.5V input.
		1 watt output)
		i wate output)

BLOCK DIAGRAM

A-65

Page 3

TA7317P (Protection Circuit)

NJM4558 (Operation Amplifier)

Page 4

PRECAUTIONS

1. For continued protection against risk of fire, replace only with same type and same rating fuse.

CIRCUIT NO.	PARTS NO.	DESCRIPTION
F901	252052	7A (ST-6), AC fuse (120V model)
F901	252077	4A-SE-EAK, AC fuse (220V model)
F902, F903	252100	10A-EAK, AC fuse (220V model)

2. Replacement for differential, driver, complementary and power amplifier transistors, if necessary, must be made from the same beta (hFE) group as the original type.

CIRCUIT DESCRIPTION

Dual Super-Servo

Onkyo's super-servo amp using ultralow frequency feedback servo circuits consisting of high-performance operational amplifiers has completely done away with a number of problems that have heretofore plagued amplifiers. These include distortion caused by capacitors used in the signal path, internally generated noise in the ultralow frequency range, and a lack of frequency response in the low ranges caused by record warp and tonearm resonance. Frequency response and tonal quality is as never before. The newly developed dual super-servo system has an additional function over our previous super-servo amp. That additional function may he noted by looking at the accompanying series of illustrations. First note the commonly used unbalanced NF amp depicted in Fig. 1 where the signal is input at point A as referenced to point B, and output at point C as referenced to point B. Common input/output reference in amplifiers is an ideal, but in fact difficult to attain This is narticularly true in power amps with high output current; unless impedances are matched, it is next to impossible. In Fig. 2, very small impedances are present at the same time return current is flowing from INPUT other circuits, thus the circuit in Fig. 2 may be considered equivalent to that of Fig. 3. Up to now, in order to lower these unnecessary impedances, large diameter wiring and busbar grounds have been used with some degree of effectiveness, however we have improved upon these methods. Looking at the problem from another angle, the dual super-servo solves the problem without improvisions. As noted in Fig. 4, by applying a superservo to the positive side, and with a servo return on the negative side, unnecessary signal components are equalized, consequently cancelled. And because the same potential exists, ground potential between input and output is the same. Put another way, in Fig. 5 and 6 the unnecessary components generated between input and output are short-circuited by the servo-circuit. Next. with separate amps, generally the preamp and main amp have been thought of as separate entities. A number of

Page 5

amp combinations have been used, but here again compatibility, or the lack of, may be attributed to ground potential in most cases. Also in the cables connecting 2 amps, there is cord impedance, contact resistence at the pin connector and wiring impedance to contend with, and even though the pin connectors are separated left from right, they became common via the power amp ground. This results in crosstalk between the left and right channel, poor channel separation, duller sound resolution and presence. And any difference in the ground potential between the preamp and power amp is detected and equalized by the servo. This is equal to the grounds of both amps being directly connected.

Fig. 4

Load

Fig. 5

Fig. 6

Page 6

COMPONENT LOCATION

- 6 -

Page 7

EXPLODED VIEW

A-65

PARTS LIST

SYMBOL NO.	PARTS NO.	DESCRIPTION	SYMBOL NO.	PARTS NO.	DESCRIPTION
A1	27110138	Front bracket	A23	27300405	Guide, lamp
A2	27130254	Bracket, selector	A24	27190009	LCB-4, Holder
A3	27140506	Bracket, volume	A26	27120313	Back panel (D)
A4	27140507	Bracket, headphone		27120314	Back panel (G)
A5	27150125	Shielded plate	A34	223012	Bracket
A6	27115026E	Side bracket	A35	270281	Holder, thermal switch
A7	27130248	Bracket, front	A37	834130068	3TTS+6B, Tap screw
A8	27130249	Bracket, back	A39	834430068	3TTS+6B(BC), Tap screw
A9	27130250	Bracket, power transformer	A40	834430108	3TTS+10B(BC), Tap screw
A11	27130251	Bracket, equalizer	A41	834230108	3TTS+10B(Ni), Tap screw
A12	27130252A	Bracket	A42	838440109	4TTB+10BQ(BC), Tapping screw
A13	27150131	Shielded plate, selector	A44	871140	SW4, Washer
A14	27150132	Shielded plate	A46	833140162	4STP+16BQ, Tapping screw
A15	27150130	Shielded plate	A47	82113015	3P+15FN, Pan head screw
A16	27130253	Band, capacitor	A48	82113006	3P+6FN, Pan head screw
A19	27190113	Holder	A49	82113008	3P+8FN, Pan head screw
A20	28130116	Plate	A50	831130088	3TTW+8B, Tap screw
A21	28199049	Film	A51	834130108	3TTS+10B, Tap screw
A22	27160091A	Radiator	A52	834140108	4TTS+10B, Tap screw

Page 8

Q313, Q314 2201313 or Q413, Q414 2201312

SYMBOL NO.	PARTS NO.	DESCRIPTION	SYMBOL NO.	PARTS NO.	DESCRIPTION
A55	28140126	53 q , Cushion	Q315, Q316	2201303 or	2SB863(O) or
A56	28140050	0.8tx50x30mm, Cushion	Q415, Q416	2201302	2SB863(R), Power amplifier
A57	28140348	0.5tx54x3mm, Cushion	D171 D471		transistor
A58	28175037	Insulating plate	R 171 , R 271	5104117	N40DQL32C100KTP500KM35H,
A301	28184112	Top cover			Volume/Balance control variable
A302	834430068	311S+6B(BC), 1ap screw	SIDIR	25020104	IESISTOR
A 303	28140020	4x10x40mm, Cushion	3101D	23030194	NKSM-102-30BU, Phono selector
A501	12509121	Front nanel ass'v	S103B	25030193	NRSM-103-30BU Cartridge
A502	28191085	Clear plate	51055	25050175	selector switch
A503	27262096	Plate, power	S801	25030196	NRSM-226-30YW. Speaker
A504	27262097	Plate A			selector switch
A505	27262098	Plate B	S901	25035201	NPS-111-L156P, Power switch
A506	27262099	Plate C			(D)
A507	27262100	Plate D	S901	25035051	NPS-122-L16P, Power switch (G)
A508	27262101	Plate E	T901 T901	230499	NPT-743D, Power transformer (D)
A509	27267113	Guide, selector	1901	230500	NPT-743G, Power transformer
A510 A511	27267114	Guide power	I II	12500505	(G) NAEO 1105 Equalization emplifier
A512	27267116	Guide, power Guide A	01	12309303	nAEQ-1105, Equalizer amplifier
A512 A513	27267102	Guide push	112	12509506	NASW-1106 Switch ne board
A514	28180079	Spring	02	12009000	ass'v
A515	28199045	Film	U3	12509507	NAPJ-1107. Input/output
A518	27262105	Plate F			terminal pc board ass'v
A522	834130068	3TTS+6B, Tap screw	U4	12509508	NASW-1108, Recording selector
A631	27170104	Bottom board			switch pc board ass'y
A632	27175009A	Leg	U5	12509509	NASW-1109, Input selector pc
A633	831130128	3TTW+12B, Tap screw			board ass'y
A634	831130068	3TTW+6B, Tap screw	U6	12509511	NASW-1111, Switch pc board
A801	28320553	Knob, volume	117	12500512	ass'y
A802	28320554	Knob, balance	07	12509512	NAIC-1112, Tone control pc
A803	20320329	Knob, selector	118	12500513	NAMA 1112 Bower emplifier
4805	28320546	Knob power	00	12507515	nc hoard ass'y
A806	28320547	Knob, tape 2	U9	12509514	NAPR-1114. Protector circuit
A807	28320548	Knob, tape 1			pc board ass'y
A808	28320549	Knob, aux.	U10	12509515	NASW-1115, Thermal detector
A809	28320550	Knob, tuner			switch pc board ass'y
A810	28320551	Knob, phono	U11	12509516B	NAME-1086b, Output power
A811	28320552	Knob, muting	1110	10540505	indicator circuit pc board ass'y
A812	28320545	Knob, base	012	12549585	NADIS-1085, Output power
A813	28320530	Knob, push	1113 1114	12540597	indicator circuit pc board ass'y
C901	27300080	Cover canacitor (D)	015, 014	12549567	LED no board ass'y
C901a	3500058	PMF265MB510 IS capacitor (G)	W901	2530994	AS-UC-3 Power supply cable (D)
C902	335251039	0.01µF. 500V. Ceramic capacitor	W901	253092	AS-CEE-2. Power supply cable (G)
C801-C804	379124737	0.047µF, 50V, DEW capacitor	W901a	270025	SR-3P-4, Strainrelief (D)
C809	335321025	1000pF, 50V, Ceramic capacitor	W901c	270280	SR-4K-4, Strainrelief (G)
		(G)
C921–C924	3504160	12,000µF, 63V, Elect. capacitor	Note: D: Only 1	20V model G:	Only 220 model
D901	223861	KBC10-02, Silicon diode
F901	252077	4A-SE-EAK, AC fuse (G)
F901a	25065096	NPF-073, Fuse holder (G)
F902, F903	252100	IUA-EAK, AC IUSE (G)
F902a, F905a DI 001	23063096	NPF-0/5, Fuse holder (G) PL 14V0.06AW 2.5, Power
11,701	210121	indicator lamp
P 801	25045044	NPI-4PRBL21 Phono input
	20010011	terminal
P804	25045026	NPJ-2PRBL04, Main output
		terminal
P805	25060044	Ground terminal
P805a	87613010	W3×10F, Washer
F805b	87313006	M3-B, Toothed washer
P806-P808	25060029	NTM-4PRMN05, Speaker
Deaa	25045062	terminal
r003	23043067	nLJ-U2/9-U1-U/U, Stereo
P901_P903	25050046 4	NSCT-2P15 Ac outlet (D)
O308. O408	2211255 or	2SC1815(GR) or
2000, 2100	2211256	2SC1815(BL), Thermal detector
		transistor

transistor 2SD1148(O) or 2SD1148(R), Power transistor

Page 9

EQUALIZER AMPLIFIER PC BOARD (NAEQ-1105) – PARTS LIST

CIRCUIT NO.	PARTS NO.	DESCRIPTION	CIRCUIT NO.	PA
	Transistors			Ca
0101.01027	2211783 or	2SA991(E) or	C156, C256	379
0201 0202	2211782	2SA991(F)	C157, C257	379
0103 0203	2211445 or	2SC2291(F) or	C171 C271	379
Q105, Q205	2211445 01	25C2291(1) 01	C173 C273	370
0104 0204	2211440	25C1215L(CD) ==	C173, C273	270
Q104, Q204	2211895 of	25C1815L(GR) of	0174, 0274	272
	2211896	2SC1815L(BL)	C175, C275	31
Q105, Q205	2211732 or	2SC1845(F) or		Re
	2211733	2SC1845(E)	R161 R261	13
0106. 0206	2211792 or	2SA992(F) or	R101, R201	- - - J -
•	2211793	2SA992(E)	R172, R272	21,
	2211/20	-2	R1/6, R2/6	4.0
	Diodes		R1/4, R1/8	43
D101, D201	223133 or	DS442X or	R182, R274
	223105	1$1555	R278, R282
			R180, R280	514
	Capacitors		,
C102, C202	391041007	10µF, 16V, LL
C107, C207	352724719	470μF,6.3V, Elect.		Sw
C110, C210	352761019	100μF, 35V, Elect.	S112-S115	250
C111. C211	379122235	0.022µF±10%, 50V, DEW
C112 C212	352980226	2.2µF 50V Non-nolar elect
C112, C212	379121225	1 200pE+10% 50V DEW	POWER AN	ИРІ
C115, C215	270121225	0.019E+5% 50V DEW	(NIAMA 111	2)
0116 0216	270121624	1.500Ε.50 50V DEW		5)
C116, C216	3/9121524	1,500pF±5%, 50V, DEW	CIDCUIT NO	D٨
CI17, C217	379125624	5,600pF±5%, 50V, DEW	circon no.	IA
C118, C218	379121024	1,000pF±5%, 50V, DEW		ICs
C121, C122	352761019	100µF, 35V, Elect.	0317.0318	222
	Desistant		0417 0418
D110 D1207	AAAGAAAAA	120 1/0W Matel and a film
R119, R120	442521204	1252, 1/2w, Metal oxide film		Tra
R219, R220 _			Q301, Q401	22
R126, R226	442621234	12kΩ, 1W, Metal oxide film		22
	Switches		O302. O303 ]	22
C101A	25065150	NES 2272 Dhone 1/2 colortor	0402 0403	22
5101A	25065159	NSO-2272, Filono 172 selector	0304 0404	22
$103A	25065156	NSS-83/1, Cantridge selector	QJ07, QT07	22
			0105 0405	22
OWITCH D			Q305, Q405	22.
SWITCH P	C BOARDS			22.
(NASW-110	6/1108/1109	)/1111/1115) – PARTS LIST	Q306, Q406	22
(1.1.1.2.1.1.1.0	0,1100,110	,,,		22
CIRCUIT NO.	PARTS NO.	DESCRIPTION	Q307, Q407	22
				22
	Capacitor		O308, O408	22
C151	352741009	10µF, 16V, Elect.	- / -	22
	Lamos		0309 0409	22
	210122	DI 14VO OGAWO G Input	Q309, Q409	22
rL001-rL000	210125	FL14 V0.00A w-0.0, Input	0210 0410	22
		indicator	Q310, Q410	22
	Switches			22.
$102	25035257	NPS-122-L221 Cartridge load	Q311, Q411	220
5102	230,33237	alastar		220
0104	25020105		0312, 0412	220
$104	25030195	NKSM-146-30SS, Recording		220
		selector	0313 03147	220
S105-S109	25035255	NPS-562-L219, Input selector	0413 0414	221
S110	25035164	NPS-142-L128, Muting	Q413, Q414 ]	221
$111	25030190	NRSM-145-30SS, Mode	Q315, Q316	220
S701	25065127	1P-105A-100. Thermal detector	Q415, Q416	220
~/ • •		1. 10011 100, 1.001mai avivetoi	Q701, Q702	22
				22
	ГРИТ ТЕРМ	INAL PC BOAPD	Q921, Q923	220
				220
(INAPJ-1107	') — PARTS I	L131	0922, 0924	2.21

(NAPJ-1107) – PARTS LIST

CIRCUIT NO.	PARTS NO.	DESCRIPTION
C805-C808	Capacitors 379124737	0.047µF±20%, 50V, DEW
P8 02, P 803	Terminals 25045072	NPJ-6PDBL36, Input/output

TONE CONTROL PC BOARD (NATC-1112) – PARTS LIST

CIRCUIT NO.	PARTS NO.	DESCRIPTION
	Capacitors
C156, C256	379122245	0.22μF±10%, 50V, DEW
C157, C257	379124725	4,700pF±10%, 50V, DEW
C171, C271	379121235	0.012µF±10%, 50V, DEW
C173, C273	379123935	0.039µF±10%, 50V, DEW
C174, C274	379121025	1,000pF±10%, 50V, DEW
C175, C275	379126825	6,800pF±10%, 50V, DEW
	Resistors
R161, R261	431421567	15MΩ, 1/4W, Solid
R172, R272	5148071	N16RQM11C110K180K30M,
R176, R276		Bass control variable
R174, R178	431421567	15MΩ, 1/4W, Solid
R182, R274
R278, R282
R180, R280	5148072	N16RGM11C220K30M, Treble
		control variable
S112-S115	Switches 25035256	NPS-422-L220, Loudness/Hi-cut/ Subsonic
POWER AN	ADI IFIFR P	C BOARD
(NAMA-111	3) – PARTS	LIST
CIRCUIT NO.	PARTS NO.	DESCRIPTION
	ICs
0317.0318	222502	NIM-4558DX
0417. 0418	222002

0201 0401		25V240(CD)
Q301, Q401	2211915 or	25K240(GR) of
0.00 0.007	2211910	25K240(BL)
Q302, Q303	2211/32 OF	25C1845(F) OF
Q402, Q403	2211/33	25C1845(E)
Q304, Q404	2211515 OF	25A995(F) 01 25A005(F)
0205 0405	2211310	25A995(E) 25A002(E) or
Q303, Q403	2211792 01	25A992(F)
0306 0406	2211795 2211593 or	25R552(E) 25R6484(C) or
Q300, Q4 00	2211595 01	250040A(C) 01 258648A(B)
0307 0407	2211572 2211603 or	2SD668A(C) or
2507, 2407	2211602	2SD668A(B)
O308, O408	2211255 or	2SC1815(GR) or
2000, 2.00	2211256	2SC1815(BL)
0309. 0409	2211634 or	2SC2229(Y) or
2003, 2003	2211633	2SC2229(0)
O310, O410	2211354 or	2SA949(Y) or
	2211353	2SA949(O)
Q311, Q411	2200864 or	2SC2238(Y) or
	2200863	2SC2238(O)
Q312, Q412	2200874 or	2SA968(Y) or
	2200873	2SA968(O)
Q313, Q314 ]	2201313 or	2SD1148(O) or
Q413, Q414	2201312	2SD1148(R)
Q315, Q316	2201302	2SB863(R)
Q415, Q416 🗍	2201303 or	2SB863(O) or
Q701, Q702	2211792 or	2SA992(F) or
	2211793	2SA992(E)
Q921, Q923	2200664 or	2SC1626(Y) or
	2200663	2SC1626(O)
Q922, Q924	2200674 or	2SA816(Y) or
	2200673	2SA816(O)
	Diodes
D301, D302	223105 ог	1S1555 or
D305, D306	223133	DS442X
D401, D402
D405, D406
D303, D403	4000068	VD1222
D304, D404

Page 10

CIRCUIT NO	ΒΑ ΒΤ Ω ΝΟ	DESCRIPTION
CIRCUIT NO.	FARISINO.	DESCRIPTION
D921, D922	224071 or	05Z24U or
022 0024	224126	GZA24U
D923, D924	224003 01
	224120	OZA180
	Coils
L301, L401	231015	S-0.8C
	Capacitors
C303, C403	379121035	0.01µF±10%, 50V, DEW
C309, C409	379121025	1,000pF±10%, 50V, DEW
C311, C411	379121035	0.01µF±10%, 50V, DEW
C323, C423	379134735	0.047µF±10%, 50V, DEW
C331, C332	352752209	22µF, 25V, Elect.
C431, C432
C925, C926	352784709	47μF, 50V, Elect.
C927, C928	352761019	100µF, 35V, Elect.
C929, C930	352760479	4.7μF, 35V, Elect.
C931–C934	352754709	47μF, 25V, Elect.
	Resistors
R309, R409	442623614	360Ω, 1W, Metal oxide film
R315, R415	5225072	N10HR4.7KBDM, Idling current
		adjustment
R331, R431	442524714	470Ω, 1/2W, Metal oxide film
R332, R432
R333, R433	442621524	150Ω, 1W, Metal oxide film
R334-R337	442520224	2.2Ω, 1/2W, Metal oxide film
R434-R437	40000 60
R338-R341	4000060	0.27Ω, 2W, Metal plate
R438-R441	440700104
R342, R343	442/20104	10, 2W, Metal oxide film
K442, K443	4000000	0.470 SW Metal state
K 344 - K 34 / D 1	4000080	0.4752, 5w, Metal plate
R444-R447	117670561	5.60 1W Matel oxide film
R350, R450	442020304	100 1W Metal oxide film
R352 R452	442626834	68k0 1W Metal oxide film
R705 R706	5225005	N10HR2 2KRD Current detector
	5225005	level adjustment
R921, R922	442524714	470Ω, 1/2W, Metal oxide film
R923, R924	442523924	3.9kΩ, 1/2W, Metal oxide film
R927, R928	442525614	560Ω, 1/2W, Metal oxide film

PROTECTOR CIRCUIT PC BOARD (NAPR-1114) – PARTS LIST

CIRCUIT NO.	PARTS NO.	DESCRIPTION
0711	IC 2225.84	T & 7217D
Q/II	222304	IA/JI/F
	Transistor
Q714	2211255 or	2SC1815(GR) or
	2211256	2SC1815(BL)
	Diodes
D711, D712	223848 or	GP-08B or
D911, D912	223804	SR1K-2
D713	224043 or	05Z6.2U or
	224098	GZA6.2U
	Capacitors
C711, C712	352922206	22µF, 6.3V, Non-polar
C714	352732209	22µF, 10V, Elect.
C715	352784799	0.47µF, 50V, Elect.
C716	352743319	330μF, 16V, Elect.
C912, C915	352741029	1,000µF, 16V, Elect.
C914	352744719	470μF, 16V, Elect.
	Resistors
R751, R752	441723904	390Ω, 2W, Metal oxide film
R911	442521004	10Ω, 1/2W, Metal oxide film
R912	442522204	22Ω, 1/2W, Metal oxide film
	Relay
RL711	25065036	NRL-4P3A-DC12-01, Speaker

OUTPUT POWER INDICATOR PC BOARD (NADIS-1085) – PARTS LIST

CIRCUIT NO.	PARTS NO.	DESCRIPTION
Q502, Q602	222621	IR2431, IC
D506, D606	225068	GL-112V13, L.E.D

OUTPUT POWER INDICATOR DRIVER PC BOARD (NAME-1086b) – PARTS LIST

CIRCUIT NO.	PARTS NO.,	DESCRIPTION
Q501–Q601	IC 222502 or 222597	NJM-4558DX or NJM-4558DN
D501–D503 D504, D505 D601–D603	Diodes 223133 or 223105 224096 or 224041 223133 or 223105	DS442X or 1S1555 GZA5.6-U or 05Z5.6-U DS442X or 1S1555
C502, C602 C503 C504, C505 C506 C508	Capacitors 352780229 352734709 352754709 352780339 352780479	2.2μF, 50V, Elect. 47μF, 10V, Elect. 47μF, 25V, Elect. 3.3μF, 50V, Elect. 4.7μF, 50V, Elect.
R502, R602 R515	Resistors 5215021 442521014	N08HR10KBD, Semi-fixed 100Ω, 1/2W, Metal oxide film

CARTRIDGE SELECTOR INDICATOR PC BOARD (NALED-1087) – PARTS LIST

CIRCUIT NO.	PARTS NO.	DESCRIPTION
D508, D509	225082	SLP-155B-01, L.E.D.

Page 11

ONKYO CORPORATION

Page 12

MAIN AMPLIFIER ADJUSTMENT

Set the all control knobs to standard position.

Standard knob position
SELECTOR	AUX
VOLUME	Minimum
BALANCE	CENTER
MODE	STEREO
LOUDNESS, SUBSONIC FIL., HI-CUT FIL.	OFF
BASS/TREBLE	OFF
SPEAKERS	Α
MUTING	OFF

1. IDLING CURRENT ADJUSTMENT

1. Connect the DC voltmeter between I_ID and V_CT terminals.

2. Adjust the voltage to 12±3mV with semi-fixed resistor of R315 and R415.

NOTES: Adjust after switching on for 5 minutes.

VOLUME	Minimum
LOAD	Open

2. CURRENT DETECTOR LEVEL ADJUSTMENT

3. OUTPUT INDICATOR LEVEL ADJUSTMENT

1. Connect the AF oscillator across AUX terminal and AC voltmeter across speaker terminals.
2. Connect the hollow resistor of 8 ohms across speaker terminal (A).
3. Set the AF oscillator output to 100mV, 1kHz.
4. Adjust the output voltage to 21.1V with volume control.
5. Then adjust the semi-fixed resistor of R502 and R602 so that the 11th L.E.D. lights up.

Page 13

PACKING PROCEDURES

PACKING PROCEDURES – PARTS LIST

SYMBOL NO.	PARTS NO.	DESCRIPTION
A851	29050454	Master carton box
A852	29090401A	Pad, bottom
A853	29090399	Pad, upper
A854	29090399-1	Pad, upper, right
A857	29095115	500×1, 100mm, Protection sheet
A858	29100034	850×650mm, Poly bag
A859	282301	Sealing hook
A861	260012	Damplon tape
A881		Accessary bag ass'y
	29340507	Instruction manual (D)
	29340508	Instruction manual (G)
	29365006	Warranty card (N)
	29365005-3	Warranty card (V)
	29358002	Service station list (N)
	29100006	250×350mm, Poly bag


Note:	(D) (G) (V) (N)	Only 120V model Only 220V model Only West Germany model Only U.S.A. model

ONKYO A-65 SERVICE MANUAL

ONKYO ® SERVICE MANUAL

SUPER SERVO INTEGRATED STEREO AMPLIFIER MODEL A-65

TABLE OF CONTENTS

SPECIFICATIONS

BLOCK DIAGRAM

A-65

TA7317P (Protection Circuit)

NJM4558 (Operation Amplifier)

PRECAUTIONS

CIRCUIT DESCRIPTION

Dual Super-Servo

COMPONENT LOCATION

EXPLODED VIEW

PARTS LIST

EQUALIZER AMPLIFIER PC BOARD (NAEQ-1105) – PARTS LIST

(NAPJ-1107) – PARTS LIST

TONE CONTROL PC BOARD (NATC-1112) – PARTS LIST

PROTECTOR CIRCUIT PC BOARD (NAPR-1114) – PARTS LIST

OUTPUT POWER INDICATOR PC BOARD (NADIS-1085) – PARTS LIST

OUTPUT POWER INDICATOR DRIVER PC BOARD (NAME-1086b) – PARTS LIST

CARTRIDGE SELECTOR INDICATOR PC BOARD (NALED-1087) – PARTS LIST

MAIN AMPLIFIER ADJUSTMENT

Set the all control knobs to standard position.

1. IDLING CURRENT ADJUSTMENT

2. CURRENT DETECTOR LEVEL ADJUSTMENT

3. OUTPUT INDICATOR LEVEL ADJUSTMENT

PACKING PROCEDURES

PACKING PROCEDURES – PARTS LIST