Nikko NA 590 Mk2 Service Manual

Page 1

NA-59011

INTEGRATED AMPLIFIER

, ,TYPE AND VOLTAGETQ', L- *

W-TYPE: UL and CSA type 120v AC '

E -TYPE: NK-STD type

N -TYPE: DEMKO and SEMKO type 220/240V AC

D -TYFE: DIN type

SERVICEMANUAL

CONTENTS
SPECIFICATIONS ................................................................... 1
BLOCK DIAGRAM .................................................................. 2
DISASSEMBLY ..................................................................... 3
POWER TRANSISTORS MOUNTING ASSEMBLY ........................................ 4
ALIGNMENT ..................................................................... 5
SCHEMATIC DIAGRAM ........................................................... 6,7
P. 0. BOARD .................................................................... 8,9
PARTS LOCATION .............................. .................................. 1O
PARTS LIST .................................................................. 11~ 13
SEMICONDUCTOR DATA,

TRANSISTORS .......................... , ...................................... 14

DIODE, LED'S ................................................................ 14

ZENERDIODES.......................... ........... » .......................... 14

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SCHEMATIC DIAGRAM

-Ugmflu-

NA-590H

M. w-.. V,

NA-590H

STISFEAXERS A

5 SZSPEAKERS

.. _ .. _ _ _ 0N
*MARXED RESISTORS AND 1 :fir IF
A DIN JACK HE DELETED Ea AMP PCB SSZTAPE MON.2 542 TAPE MON.I MAIN AMP PCB .11, Dial E
FOR W-TYPE or on I3-0V 3 l1207ll stay
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S 5 -x 55° ux -- ° N '2 =\ Ex? 9 "
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x 2 " m s: max I g In
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5 var I 'I 9 A A A I
NOTES: E}, . Egg .. §_. In" A m I 55'. a}. 5.. WA: alum In 5. ,
1.SCHEMATIC Is SUBJECT To CHANGE 0" L I gg a a g: ' : nu am am
WITHOUT NOTICE. m- : : unIna 2m
UNLESS OTHERWISE SPECIFIED: 3 '30qu § _ :33:
z. RESISTANCE VALUES ARE IN OHMS. I T I! : "my: I
K a 1000; M = 1.000.000 = II- . T 5 I, ' I
3. CAPACITANCE VALUES 1.0 AND ABOVE g g ,2: l ' - ; g a s. A
ARE IN pr- on "E IP=DF.M=uFI. ° : "' - I 8 21m: "
LESS THAN 1.0 ARE W F, "W 5,. : m-c
(ELECTROLYTIC CAPACITANCE VALUES ,1 "I Hj 'd I
ARE IN uF/WV.) _ _ w-rer '_ __ E Nae-TVPE
4. VOLTAGES ARE MEASURED TO CHASSIS I - 1 I

GROUND WITH NO SIGNAL APPLIED
USING A "DC VOLTMETER'K
SCHEMATIC SYMBOLS:
Q POLYESTER FILM CAPACITOR
O NONFLAMMABLE RESISTOR

WARNING: A INDICATES SAFETY CRITICAL COMPONENTS FOR CONTINUED SAFETY.
REPLACE SAFETY CRITICAL COMPONENTS ONLY WITH MANUFACTURER'S
RECOMMENDED PARTS.

Figure 3