Onkyo TX 870 Service Manual
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Extracted text from Onkyo TX 870 Service Manual (Ocr-read)
Page 1
SERIAL NO. 3311
ONKYO SERVICE MANUAL
QUARTZ SYNTHESIZED
TUNER AMPLIFIER
MODELS TX-870/TX-870M
BHUD,BHUDN.MBHUDN IZOV AC,60HZ
MBHUWX lZOJZZOV AC, SO/GOHZ
SAFETY-RELATED COMPONENT WARNING TABLE OF CONTENTS
COMPONENTS IDENTIFIED BY MARK A ON
THE SCHEMATIC DIAGRAM AND IN THE PARTS Specifications ....................... 2
LIST ARE CRITICAL FOR RISK OF FIRE AND
s w d - .................... 3
ELECTRIC SHOCK. REPLACE THESE COMPO 5 7 I 4
NENTS WITH ONKYO PARTS WHOSE PART KP Ed 6W """""""""""""""
NUMBERS APPEAR AS SHOWN IN THIS Parts 1151 ---------------------- 5
MANUAL. Block diagramATuner section --------------- 6
Block diagram-Amplifier section -------------- 7
MAKE LEAKAGE CURRENT 0R RESISTANCE IC block dIa ram and descri lions IIIIIIIIIII 8
MEASUREMENTS TO DETERMINE THAT EXPOSED . g p
PARTS ARE ACCEPTABLY INSULATED FROM AdJUS'mem Procedures ----------------- - 18
THE SUPPLY CIRCUIT BEFORE RETURNING PC board View/parts lisI ----------------- 2]
THE APPLIANCE TO THE CUSTOMER. FM/AM {uney .................... 21
Display/Operation swiIch ---------------- 23
Pre. and power amplifier ---------------- 25
Tone control ..................... 23
Power Supply ..................... 29
Volume/Volume indicator --------------- 30
Packing view ....................... 3]
ONKYO
AIIIIIII BflMPIIIIIIIIS
Page 4
EXPLODED VIEW