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M O D E L S A - 9 5 O O I I O M E SI N F O U R V E R S I O N SD I S T I N G U I S H E D S F O L L O W S : A C
U L ( U . S . A . )a p p r o v e d
C S A ( C a n a d a )a p p r o v e d
22OV and 24OV (Switchable)
N S E M K O ( S w e d e n ) , E M K O ( N o r w a y ) ,D E M K O ( D e n m a r k ) a n d E l ( F i n l a n d )a p p r o v e d G e n e r a le x p o r t m o d e l
12 O V . 2 2 O v a n d 2 4 O V ( S w i t c h a b l e )
This servicemanual is applicableto the KU-type. When repairing the KC-type, HG-type, S-type, please the additionalservice manual. see
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1. 2. 3. 4. 5. . . S P E C T F T C A T I O. N. S D CONNECTION IAGRAM
CONTENTS
5 6 7 9
F R O N TP A N E L F A C I L I T I E S . . BLOCK DIAGRAM CIRCUITDESCRIPTIONS 5.1 5.2 5.3 5.4 5.5 E q u a l i z e A m p l i fi e r r Tone Controls PowerAmplifier ProtectionCircuit PowerSupply Circuit
11 11 12 13 14 15 16
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LEVEL DIAGRAM D I S A S S E M B L Y. PARTS LOCATION 8.1 8.2 8.3 8.4 8.5 Front PanelView Front View with PanelRemoved . . Top View Bottom View . RearView
7. 8.
18 19 20 21 22 23 24
9. 10.
ADJUSTMENT E X P L O D E DV I E W S PARTS LIST 11.1 11.2 Miscellanea Diagram Schematic
1 1 . S C H E M A T I CD I A G R A M S ,P . C .B O A R D P A T T E R N SA N D
32 33
3
1 1 . 3 Switch Assembly (AWS-1 09) 'tI.4 Phono (AWX-107)
Jack Assembly
11.5 11.6 11.7 11.8 12.
Equalizer Amplifier Assembly(AWF-024)
(AWS-1 SwitchAssembly 02)
Control Amplifier Assembly(AWG-045) PowerAmplifier Assembly(AWH-052)
35 41 42 45 46 50 53
PACKING
sA-s|500II
1.SPECIFICATIONS
Semiconductor Transistors Diodes Power Amplifier Section Circuitry l r e . . . 2 - s t a gd i f f e r e n t i aa m p l i l ' i eP a r a l l c l P Pd i r e c t - c o u o l Od L . eC P o w e r u t p u t f o r m 2 0 H e r t zt o 2 0 , 0 0 0H e r t z Continuous O ( B o t hc h a n n e ld r i v e n ) . 8 0 w a t t sp e r c h a n n e( 8 o h m s ) s . l I 0 0 w a t t sp e r c h a n n e( 4 o h m s ) l T o t a l H a r m o n i c i s t o r t i o n t 2 j H e r t z .t o 2 0 , 0 0 0 H e r t z D a r C o n t i n u o u sa t e dp o w e ro u t p u t . . 0.05% p c r c h a n n ep o w e r u t p u t ,8 o h m s . . . . 0 . 0 1 % 4Owatts l o t l w a t t p e r c h a n n p o w e r o u t p u 8,o h m s. . . . . . 0 . 0 1 % el Intcrmodulationstortion Di r . 0.05% C o n t i n u o u sa t e dp o w c ro u t p u t p 4 O w a t t s e r c h a n n ep o w e ro u t p u t ,8 o h m s . . . . 0 . 0 ' l % l l w a t t p e rc h a n n ep o w e ro u t p u t ,8 o h m s l . 0.01% Frequency esponsc R 5 H e r t zt o I 0 0 , 0 0 0 H e r t zt d B l In p u t( S e n s i t i v i t y / p e d a n c e ) ml P O W E R l \ 4 PN A l ]V/5Okohms Output ... Speaker A,B,A+B Headphone: Lowimpedance ( D a m p i n g a c t o r 2 } H e r t tt o 2 0 , 0 0 0 H e r t z , 8 o h m.s.) . 3 0 F H u m a n dN o i s c l H F , s h o r t - c i r c u i r e d n e t w o r k ) . l l 0 d B ( A , . Preamplifier Section 55 33 c T o t a lH a r m o n i D i s t o r t |