Onkyo ARV 400 Service Manual

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A-RV400

SERIAL No. 3324

ONKYO@ SERVICE MANUAL

Integrated Stereo Amplifier
MODEL A-RV400, A-RV400M, A-8640

7' UD7 I 120v AC. (IOHZ
U6 7 220v AC. 50Hz
-UQ(A. B) V 240v ACI.S6HZ
I UW 7 . l?(]V/22(JV ACSOIIz/mHz

SAFETY-RELATEDCOMPONENTWARNING!! TABLE OF CONTENTS

COMPONENTS IDENTIFIED BY MARK 12. ON w "em Page
THE SCHEMATIC DIAGRAM AND IN THE Specifications 2
PARTS LIST ARE CRITICAL FOR RISK OF FIRE Adjuslmem procedures 3
AND ELECTRIC SHOCK. REPLACE THESE Pagaunom 4
COMPONENTS WITH ONKYO PARTS WHOSE : , . ,
PARTS NUMBERS APPEAR AS SHOWN IN THIS 535?" "10 4
MANUAL. Cha Sis exploded View 5
[C block diagram 7
MAKE LEAKAGE-CURRENT 0R RESISTANCE Prinlcdcircuit board partslist 12
MEASUREMENTS TO DETERMINE THAT Fronwanelfadmics 15
EXPOSED PARTS ARE ACCEPTABLY INSU- Pamlismf ackin 16
LATED FROM THE SUPPLY CIRCUIT BEFORE M, F g
RETURNING THE APPLIANCE To THE CUS- 3 gm" '7
TOMERI Schematicdiagram I 19

; ONKYO
i Alllllll BflMPflNHflS

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LC6538D
Pin No liu uamc Symbol Function

1 'llft/Slt) SK Segmentoutput terminals. Active: H

2 TI Z/Sl I SI

3 "I'll DISPLAY Display control output terminal. "I I" when display is illurninatcd.

4 [10 DIRECT Direct display output terminal. H" when direct is on.

5 T) FM FM control output terminal (receiver only). H" wlten set to FM. Controls
the automatic reception mode display.

6 TR [)9 Digit output terminals. Active: IH Key scan output terminals.

7 T7 D8

8 To D7

) 'I'S Du

ltl T4 [)5

| l 1'} D4

l2 '1'2 [)3

l3 'll D2

l4 Ttl DI

15 V.,,, VI," lowel supply terminztl(+5V)

1t! ()SCI ()SCI Main system clock te rmin: '. Connected to 4 M Hz ceramic oscillator. The

17 OSC2 OSCZ systemclock mode is equivalentto the main clock 2 mode (cycle time: 2ls).

l8 V V55 Ground term

I) TEST TESI LSI test Ierml 1 Connected to V.

21) RES RES Reset input terminal. Active: L. 0

2| XI X1 Sub»cloek teI' tls. Not used. XI ternlinal iscoimecttcd V.,.,.

22 X2 X2

23 PG) L AL Automatic reception modedisplay output terminals. Active: L. L" when

24 ICl :D'X 7 in automatic reception mode (receiver only). (The settings tor DX and

25 ICZ AUTQ LOCAL as well as AUTO and MONO are always the reverse of one

26 PC} MONO another.) Allare always L" loramplilier.

27 IDU POWER POWER signal output terminal. H" when ON.

28 PDI RELAY Smakerrelaycontrol output terminal. Active

2) PD] VDt Video signal control output terminals. Active: H.

3|] ID} VDl

3| IAt) K0 Key input terminals. Active: H".

31 lAl Kl

33 lA2 K2

34 |/\3 K3

35 PB S5 Station detect input terminal (rcccivcronly). Active: l .Turnsotlauto
tuning.

3ft tlil Stereo broadcast detect tel initial. Active: L". Controls STEREO

. indication (receiveronly).

37 ll32 RF IN RFinputterminal (receiveronly). DX when H".

38 I'll} REC/AMP Initial settinginput terminals.

3) IEtl/VREFU BACK

40 lEl/VREFI FHONO PHONOcontrol output terminal. L" when selector is setlo PHONO.

41 IEZ/STA RT A m/MONO/ r: AUTO/MONO switching output terminal 1." when AUTO

TAPE 2 t ronly)
(2) Ampl ier: TAIEQ control output terminal. L when TA lE-Z is on.
g>i42 llitl/Sltl SEL Output terminal connected to analog switch LC7821 CE terminal.

43 IFl/SOt) DATA Output terminal connected to DATA terminal oi PLL LM700I and DI
terminal of switch LC782 |.

44 lFZ/SCKO CL Output terminal connected to CL terminals of PLL LM7tlUl and switch
LC782 l.

J5 lFJ/INTO ILL Receiver: outputterminal connected to CEterminalol'PLL LM7UUI.

4r. lCtl/Sll DlRECT Dl RECT control output terminal, Active: "L.

47 lGl/SOI lNlMUT INPUT selector muting output terminal. Active: H.

48 KHZ/SEW RE MUT Record outputmuting output terminal. Acitvc: H

~19 l(i3/lN'll l6 E lowerollscnsor input terminal. Active: L. L shorter than ltXlus is
ignored.

5t] llltt/DACU TU MUT Tuner muting output terminal (receiveronly). Active:H".

5] H l l/l)ACI PROTECT lrotect operation sensor input terminal. "ll during protect operation. H"
shorter than ltltlus is ignored. Controls RELAY output.

52 Pl ll/SOR SYS IN Systemcode input terminal. Active: H.

53 Pl l3/l [(N'l' SYS OUT! System code output terminal. Active: L. Becomes at setting input

SYS EN terminal SYS EN when poweristurned on.

54 St! Sa Segment output terminals. Active: H.

55 5] Sb

56 SI Sc

57 S} Sd

58 SJ Sc

59 55 St

()0 St) St;

at 57 Sh

(72 VP Vl Power supply terminal {or pull down resistance.

63 T1 5/88 Si Segment output terminals. Active: H".

(7-1 'I'l-1/S9 Sj

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A-RV400