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o This service manual is applicable to the KU type.
CONTENTS
I.SPECIFICAT|ONS .......3
2. FRONTPANELFACILITIES .....4
3. DISASSEMBLY .... 6
4.PARTSLOCATION ......6
5. BLOCKDIAGRAM ......8
6. LEVELDIAGRAM .......8
T.CTRCUITDESCRIPTIONS... ...' 9
S.ADJUSTMENTS ......10
9. EXPLODEDVIEWSANDPARTSLIST . . . . . . . 11
10. SCHEMATIC DIAGRAM, P.C. BOARD
PATTERNS AND PARTS LIST
10.1 Miscellanea '.-..'.14
10.2 Schematic Diagram 15
10.3 P.C. Board Connection Diagram 18
10.4 Parts List of P.C. Board Assembly 21
11. PACKING . . .. ... 22
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1. SPECIFICATIONS
Semiconductors
lCs
Transistors 27
Diodes ...... 18
Amplifier Section
Continuous p0wer output of 45watts* per chan-
nel, min., at 8ohms from 20Hertz to 20,000
Hertz with no more than 0.\3%total harmonic
distortion.
Total Harmonic Distortion (20 Hertz to 20,000 Hertz,
I ohms, from AUX)
22.5 watts per channel'power output
.No more than 0.02%
Intermodulation Distortion (50 Hertz : 7,000 Hertz= 4 : 1
8 ohms, from AUX)
continuous rated power output . . No more than 0.03%
22.5 watts per channel power output
No more than O.O2%
Damping Factor (2OHertz to 20.000 Hertz, S ohms) . . 50
I nput (Sensitivity/lmpedance)
PHONO ....2.5mV/50kilohms
TUNER 150mV/50 kilohms
AUX. ....150mV/50kilohms
TAPE PLAY 1 ,2 . . 150mV/50 kilohms
Phono Overload Level (T.H.D. O.O5o/o, 1.000H2)
PHONO 130mV
Output (Level)
TAPERECl,2.. ... 150mV
Speaker .... A,B,OFF
siA-ci1 cl
Frequency Response
PHONO (R IAA Equalization)
TUNER, AUX, TAPE PLAY
20Hz to 20.000H210.3d8
1.2
. . 1OHz to 60,000H2 13dB
Tone Control
BASS. ..t10dB(100H2)
TREBLE ....t10dB(10,000H2)
Subsonic Filter . . 15Hz (-6dB/oct)
Loudness Contour (Volume control set at -40dB position)
. . . . +6dB (100H2), +3dB (10,000H2)
Hum and Noise (lHF, short-circuited, A network)
PHONO . . .82dB
TUNER,AUX,TAPEPLAY 1,2. ., ... IOOdB
Miscellaneous
Power Requirements AC 120V,60H2
PowerConsumption ...100W(UL)
Dimensions . 42O(Wl x 94(H) x 347(D) mm
16-9/16(W) x 3-11l16(H) x 13-11/16(D) in
Weight (without package) 6.9kg (15 lb 3oz)
Furnished Parts
Operatinglnstructions ........1
NOTE:
Specifications and the design subject to possible modifications without notice due to improvements.
* Measured pursuant to the Federal Trade Commission,s Trade Regulation rule on Power Output Claims for Amplifiers.
