Onkyo A 8870 Service Manual

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A-8870

Ref. No. 3404
ONKYO@ SERVICE MANUAL
Integrated Stereo Amplifier
Black and silvcr models
SAFETY-RELATEI) (IOMIONI-ZNI' WARNINGEI
COMPONENTS IDENTIFIED BY MARK in ON THF. TABLE OF CONTENTS
SCHEMAIICDIAGRAMANDIN I'HEPARISUSTARECRITI» Spccilmuions ___________________________________ 2
CAL FOR RISK OF FIRE AND |il.l:("lRI(, SI [0(KV REPLACE Prcmunons ........................................ 3
lllFQECOMIONEN'IS WITH ()NKYO PARTS WHOSE PARIS Adjustmem procedures .. ,.,. , ____ ____ |______ . I 3
7 , . . . . .
NLMBERS AII EAR AS SI [OWN II\ IIIIS MANUAL, IC hlnck diagram .................................. 4
MAKE LEAKAGE-CURRENT OR RESISIANCF. MEASURE-r Block dmgrnm 7
MENTS To; DETERMINE THAT EXPOSED PARTS {\REAC: Chassis exploded View ................................ 9
(TEPTABLY IIIMSULA'I {20 IROM lllh SIJIPLY ( [RC UII lrinlcd 0mm bnau'd pzu'ls list ___________________ [2
RITCRI: Rh] URNINQ 'l HE APPLIANCE TO THE (US Prinlcd Clrcuit hoard View ............................ 16
1OMI'R' Schematic diagram .................................. 2|
Packing pun list ................................... . 24
From panel l'ucililicx ....... . . . . ..................... 25
Syslcm connections ................ , . ............. 25

% ONKYO.
{Llllllfl BBMPIININIS,

-1-

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?ECT

_ POWER AMP.
' VOLUME RELAY
- d-lRSZI 47¢ CO) A
1 0503 M RLES' :lSPEAKERS
omvs A _,W_< 852
B
A+B Rch-v
_°/o_-A PHONES
VF
ATTENUAToR BALANCE 3
TONE L4 RLesI
CONTROL
suesomc PROTECIDR + 35
MODE 0353
055:
RC TREBLE BASS OBIO 0352
OBI5 oeor POWEE
87 +5: @1
V PH
BUS
xeon ' RI
slrifllifi T 6 LINE _D
4 can
41 T 36 O
5 33
080! 37 094' T90! U0l5
III 1
2 MICRO PROCESSOR +87
CONST
E +55 VOLTAGE (1 AC
.5.2s~29 T OI09 LINE
-Bs cousT -B7
9 IO 3 39 4 I7~2o 34a VOLTAGE 0931
22~25 0H0 _
0306 090: 095:
092!
a 305 RESET CONST
35 VOLTAGE 'N
_ LED 0902
- -55 CONST
VOLTAGE
INPUT +5] 5
POWER-I SELECTOR I _B
5852 MIND +510 SYSTEM
STAND BY SET +39
CONST
a E
0505