kenwood ka801 integrated amplifier service manual

** 173 **I ,-/ KENWOOD ~I I PARTS CARDI ~I I'-PA-RT-ORD-ERE-D I ORDER NO, I DATE ~ LOCATION NO, ADJ STOCK

-..---'

P1030 11/14/84 931026-10-041

ERVIC

)CUST, CODE

022222-00

ANUAL

CUSTOME R NAME

ROBERT BILOW

CODEMODEL NO,

11KA801

QTY,PART SHIPPEDo00~,~ IB51-0575-000..I

jI

II

KA-801(KA-a011)

""'!'~~~':~'~'~""'Hn "~"'"

~=~~ I -.-. a 11 0-0--..n·""/,I!! I!! ~ -"""" I"

__ ••_ .,_ It' yo _

CJ ~",.." "(7)"" ,. ", (7):"'... "H~"'ft. ~/ - ~' • '0', 0'~C" (" ,~, "I,J ~ " , :'"

:.'J ~ ,0 ,', I!! ~ •. ",(". vOt.UMt. J:~f"'Ol

HIGH SPEED DC INTEGRATED AMPLIFIER

3"'-b' .4

556891012

CONTENTS

EXTER NAL ViEW .

INTER NAL ViEW .

BLOCK DIAG RAM .

LEVEL DIAG RAM .

DISASSEMBLY FOR REPAIR .

EXPLODED ViEW .

EXPLODED VIEW PARTS LIST .

PARTS liST .

CIRCU IT DESCRIPTION .

ADJ USTMENT 18

PC BOAR D 21

SEMICONDUCTOR SUBSTITUTIONS 22

SCHEMATIC DIAG RAM 23

Note:

Component and circuitry are subject to modification to insure bestoperation under differing local conditions. This manual is based on. the

U.S. (K) standard. and provides information on regional circuit modificationthrough use of alternate schematic diagrams. and information on regionalcomponent variations through use of parts list.

Region Code

2

U.SA KCanada pPX U

Australia XEurope WScandinavia L

England TSouth Africa SOther Areas MAudio Club (KA-8011) H

Power meter(B31-0288-05)

EXTERNAL VIEW

Knob(K21-0359-04)

Panel ass'y"

rI rI

·1"- '.'"""'1,,",'. '",'" 1'1 ..<,' ! '.:. !,-' " . -~

'''", .. " -

·eJ···.'~, ' K••••• 'Y," ..h·O·",,·,,··'," ": .., Or""",," '. m'·····0' c'"

' ... ~ . ""~'~'T_

'~,, , ,> : 1. .'" .:, '" ,""t/ J " "'; ,.," "', ,VOCU¥£c.bNTROL

Headphone jack(E11-0060-15)

Phono jack(E13-0811-05)

Knob(K27-0076-04)

Knob(K21-0368-04)

Binding post ass'y(E20-0812-05)

Foot"

GND Terminal(E21-0006-25)

DIN connector(E06-0510-05) AC outlet· Power cord"

••Refer to Parts List.

3

Electrolytic cap.(C90-0379-05)

Relay(551-4034-05)

Power transformer*

Preamp PCB ass'y*

Control PCB ass'y(X 1 1- 1 500-1 11

INTERNAL VIEW

Preamp PCB ass'y*

Rotary wafer switch(501-1055-05)

Coupling(D22-0031-04)

Shaft(D21-0453-03)

Lever switch*(Power)

4

* Refer to parts list

BLOCK AND LEVEL DIAGRAM

BLOCK DIAGRAM

PHONO 2 r#-

PHONO 1 c#-TUNER @J1AUX c#-,PLAY =®A TAPE

L:. REC

r PLAY

B TAPE I-RECDIN

CONNECTOR

,--XOS-1660-10-----, IEO AMP. TAPE MONITOR

~S1MODE

X11-1500-11ATTENUATOR LOUDNESS TONE AMP.

([YS3 N@ % @- "='0k~ ~52 S4/~1DC BALANCE L ...J

COUPLED VOLUME TONE S5

X07-1640-10 I

1~IVER/POWER ~S4@

@) r==::::::I ~RELAY

ff]METER AMP.

LEVEL DIAGRAM

~(dB)

OOj

403020100-\wi- 10J®--® _

-20 200 mV-30-40-50~CD.~_(7)

2.5 mV

@)

® ®29.66V Ian

f = 1 kHz

o dB = 1V

5

DISASSEMBL V FOR REPAIR (1)

Shaft

SUb~ft

Remove the bottom plate and cace.

(Refer to Exploded View.)

Power Transistor

"~RemoveM3 x 12

® Shaftretainer

To pullout the shaft. position therear-side detent of the plastic shaftretainer to the slit on the sub-panel.

6

Power Meter

Sub panel

I board

Lighting acry ~® Remove

Dress board

Lamp

DISASSEMBL V FOR REPAIR (2)

Rear Panel/Panel Ass'y

Frame

Preamp PC Board

When checking the Preamp PC Board or Control PC Board, remove all thescrews fixing the pannel ass'y or rear panel. and then decline the panel.

Preamp

Rear panel

Rear panel

~PUIIxi\(\~

~\}s U nit holder

Preamp PC Board (X08-1 660-101

7

[i~.~ •.. -. - .•.,.

: 1ft ~8a1

2

3

8

EXPLODED VIEW

B

* Refer parts list. " New parts

EXPLODED VIEW PARTS LIST

Fig. No.Parts No. Description

Re-

marks1

-Capacitor band 1B2

C90-0379-05Electrytic cap. 10000!,F63WV,,1 B3

*F05- Fuse(5A) 1B4

J 13-0058-05 Fuse holder ,,1 B5

-Pin ass'y 1B6

-Unit holder 1B7

551-4034-05 Relay 1B8

*L01- Power transformer ,,1 B9

-Chassis ,,1 B10

-PCboard ,,1 B

11

N14-0115-05Nut 1B12

-Frame ,,1 B13

B30-0167-05Lamp ,,1 B14

-5hield case ,,2B15

-Washer 2B16

R06-6002-05Potentiometer (BALANCE),,2B17

533-2041-05Lever switch " 2B18

Xll-1500-11 Control PCBass'y " 2B19

R10-5003-05Potentiometer (VOLUME)" 2B20

Xll-1500-11Control PCBass'y ,,2B

21

533-2041-05Lever switch ,,2B22

533-4019-05Lever switch (TONE) " 2B23

R08-3018-05Potentiometer (TONE)" 2B24

501-1056-05Rotary wafer switch (MODEl" 2B25

-Hardware " 2B26

N09-0303-055crew ,,2A2B27

590-0008-05Remote switch shaft " 2B28

590-0009-05Remote switch shaft ,,2B29

-Cushion 2B30

*E30- Power cord 2B

31

*J41- Power cord bushing 2B32

*F03-0008-05 AC outlet 2B33

E21-0006-25"GND terminal 2B34

N09-0292-055crew 2B35

-L shape hardware 2B36

E20-0812-05Binding post ass'y (5peaker),,3B37

501-1055-05Rotary wafer switch " 3B38

-PCboard ,,3B39

*X08-1660-** Preamp PCB ass'y ,,3B40

-Frame ,,3B

41

E13-0811-05Phono jack (8P) 3B42

-Rear panel ,,3B43

-Heat sink ,,3B44

-PC Board " 3B45

Vll-5100-10 Diode 5TV-4H (W) 3B46

V01-1107-1OTransistor 25A 1107 (2) (R, Q),,3B47

V03-2587-10Transistor 25C2587 (2) (R, Q),,3B48

AO1-0346-1 3Case "lA49

N08-0 125-05Dress screw 1A50

B19-0201-14Lighting acryl board "lA

51

-Meter support hardware "lA52

B31-0288-05Power meter "lA53

B03-0 134-04Dress plate "lA54

*533- Lever switch (Power) ,,2A55

E11-0060-15Headphone jack 2A56

K27-0077-04Knob ,,2A57

D21-0453-035haft ,,2A58

BO1-0124-04I Panel escutcheon

" 2A59

K21-0359-04I Knob (VOLUME) " 2AFig. No.

Parts No. DescriptionRe-

marks60

K21-0368-04Knob " 2A

61

K27-0076-04Knob (Lever) ,,2A

62

-Bottom plate ,,3A

63

* J02- Foot 3A64

D22-0031-04Coupling 3A

65

-Front glass ,,2A

66

*X07 -1640-** Power amp PCBass'y ,,1 B

9

PARTS LIST (1)

',"( New partsFP: Flame-proofRD: Carbon film resistorRC: Carbon composition resistorRW: Wire wound power resistorRN: Metal film resistorRS: Metal oxide film resistor

TOTAL

Ref. No.Parts No. Description

Re-

marks-A01-0346-13Case tr

-A20-1324-02Panel ass'yK,P,U,M,S,X,W,Ltr

-A20-1326-02Panel ass'y Ttr

-A20-1360-02Panel ass'y Htr

-

B01-0124-04Panel escutcheon x 2tr-B03-0134-04Dress plate tr

-B19-0201-14Lighting acryl boardtr-B30-0167-05Lamp (8V,O.15A) x 2tr-B31-0288-05Power meter x 2 tr-B46-0055-20Warranty cardP-846-0060-00Warranty cardT-846-0061 -20Warranty cardK-B46-0062-20Warranty cardU,H-B46-0063-00Warranty cardU-B46-0064-00Warranty cardX-B50-1 77 3-00Instruction manualK,U,S,Xtr

-B50-1 774-00Instruction manualP,Mtr

-B50-1 77 5-00Instruction manualTtr-B50-1804-00Instruction manualHtr

-B50-1805-00Instruction manualW,Ltr

Cl,2

C 54-3310-39CeramicO.OlJLF25KVDC

W,L,TCl,2C90-0 145-05Metal filmO.OlJLF125VK

Cl,2C91-0023-05CeramicO.OlJLF250V

U,M,H,S,XCl.2C91-0025-05Metal filmO.OlJLF125VP

C3C54-3310-39CeramicO.OlJLF25KVDC

W,L,TC4,5C46-1710-37FilmO.OlJLF±20%

-

D21-0453-03Shaft-

D22-0031-04Coupling-D32-0083-04Switch StopperU,M,H,S,X,W,L

-E03-0008-05AC outlet x 3K,P,U,M,H,S,X-E20-0812-05Binding post ass'y (SPEAKER)-E21-0006-25GND terminal

-E30-0 181-05Power cordK,P

-E30-0185-05Power cord X-E30-0515-05Power cordU,M-E30-0580-05Power cordH,W-E30-0585-05Power cord L

-E30-0602-05Power cordS,T

-HOl-1831-04Carton boxK,U,M,S,X,W,Ltr-HOl-1832-04Carton box Ptr-HOl-1833-04Carton box Htr-HOl-1834-04Carton box Ttr-H10-1520-02Polystyrene foamed fixture x 2tr-H20-0448-04Protection coverM-H20-0453-04Protection cover K,P,U,H,S,X,W,L,T-H25-0078-04Polyethylen bag

10


Re-

marks-

J02-0049-14Foot x 4P,U,M,H,S,X,W,L,T-J02-0073-04Foot x 4 K-J25-1507-03PC Board (Speaker terminal)-J41-0024-15Power cord bushingS,X,L,T-J41-0033-05Power cord bushingU,M,H,W- J41-0034-05Power cord bushingk,P

-K21-0359-04Knob (VOLUME) tr- K21-0368-04Knob x 7 tr- K27-0076-04Knob (lever) x 5 tr-K27-0077-04Knob tr

-LOl-1661-15Power transformerKtr-LOl-1662-15Power transformerTtr-LOl-1665-15Power transformerU,M,H,S,Xtr-LOl-1666-15Power transformerW,Ltr

LOl-1667-05Power transformerPi"(

L1,2L39-0085-05Phasecompensation coiltr

-

N08-0 125-05Dress screw (Case)x 6-N09-0304-05Screw (Case)L

Rl.2

R47-1447-95FP-RS4.712±5%lWR3.4

R47-1456-15FP-RS56012±5%lWR5.6

R47-1510-05FP-RS1012±5%2WR7~14

R43-1210-05FP-RD1012±5%1/4W

Sl

S33-2042-05Lever switch (Power)W,L,TtrSl

S33-2046-05Lever switch (Power)K,PtrS1

S33-2047-05Lever switch (Power)U,M,H,S,XtrS2.3

S31-2001-05Slide switch (Power voltageselector)

U,M,H,S,X,W,LS4

SO1-1 055-05Rotary wafer switch (Speakerselector)-

S90-00 10-05Remote Wire (Input selector)-

S90-0011-05Remote Wire (Tape)

01

V01-ll07-10Transistor2SAll07 (2) (R.O)02

V03-2587-10Transistor2SC2587 (2) (R,O)03

V01-1107-10Transistor2SA 1107 (2) (R.O)04

V03-2587-10Transistor2SC2587 (2) (R,O)05

V01-1107-10Transistor2SA 1107 (2) (R,O)06

V03-2587-10Transistor2SC2587 (2) (R,O)Q7

V01-1107-10Transistor2SA 1107 (2) (R,O)08

V03-2 587 -10Transistor2SC2587 (2) (R.O)

Dl,2

Vll-5100-10 Diode STV-4H (W)

-X07-1640-01Power Amp. PCBass'yU,M,H,S,Xtr

-X07-1640-10Power Amp. PCBass'yK,Ptr-X07 -1 640-61Power Amp. PCBass'yW,L,Ttr

-X08-1 660-10

Preamp, PCB ass'y K,P,U,M,H,S,Xtr-X08-1660-61Preamp, PCB ass'yW,L,Ttr-Xll-1500-11 Control PCBass'ytr

PARTS LIST (2)

~ POWER AMP. PCB ASS'Y (X07-1640-01,-10,-61)


Re-

marks-.Cl,2C90-0395-05Electrolytic 10JLF25WV

C3~6C24-1410-61Electrolytic 10JLF25WV

Cll,12C46-1747-36Mylar0.047JLF±10%

C13,14C24-1047-61Electrolytic 47JLF10WV

C15~18C25-1747-47Electrolytic 0.47 JLF50WV

C19,20C90-0379-05Electrolytic 10000JLF 63WV«:{

C23~26C54-2 710-39CeramicO.OlJLF+ 100%-0%

C30C90-0394-05NP-Electrolytic47JLF

25WV «:{

C31,32C24-1210-61Electrolytic 10JLF16WV

C33C25-1210-77Electrolytic 100JLF16WV

C34,35C25-6522-57Electrolytic 2.2JLF35WV

Fl~4

F05-5021-05Fuse5Ax4

K,P,U,M,H,S,X.L.TFl~4F05-5024-05Fuse5Ax4W- J 13-0058-05Fuse holder x 2 «:{

VR1,2

R12-0052-05Trimmino Potentiometer500nB x 2 (Power meter adj.)VR3.4

R12-0047-05Trimming Potentiometer100nB x 2 (Bias)

Rl~4

R43-1227-05FP-RD2712±5%1/4WR5,6

R43-1236-05FP-RD3612±5%1/4WR19,20

R43-1247 -05FR-RD4712±5%1/4WR21 ~ 28

R92-0175-05Cement0.4712 3WR29~32

R47-1610-05R51012±5%5WR43

R47-5447-25R54.7kn±5%lWR46

R47-1568-15R5680\2±5%2WR48.49

R47-5527-25R52.7kn±5%2WR60~62

R47-1539-05R539\2±5%2W

RL1

551-4034-05Relay

01,2

V03-0468-05Transistor25C1913 (O,R)03.4

V01-0 188-05Transistor25A913 (O,R)05,6

V03-0270-05Transistor25C945 (R,O)07~10

V01-0733-30Transistor25A733 (A) (R,O)011,12

V03-0270-05Transistor25C945 (R,O)

Dl~4

Vll-0273-05Diode152076A05,6

Vll-0271-05 Diode15207607,8

Vll-0295-05 DiodeW06B09

Vll-4102-10 Zener DiodeWZ-050Dll~18

Vll-0465-05 DiodeGP25D orVll-2100-10

DiodeU05C (5)

ICl

V30-0291 -1 0ICHA12002IC2

V30-0292-10ICTA7318P

PREAMP. PCB ASS'Y (X08-1660-1 0,-61)


Re-

marksC9~14

C24-1010-71Electrolytic 100JLF10WVC15,16

C24-651O-71Electrolytic 100JLF35WVC17,18



C24-1747-61Electrolytic 47JLF50WVC25,26

C26-171O-67NP-Electrolytic10JLF

50WVC27,28

C49-2051-34Film0.051JLF±2%C31,32

C49-2018-44Film0.18JLF±2%C33,34

C46-1739-26Mylar0.0039JLF ± 10%C35,36

C52-1710-26Ceramic1000pF±10%C37,38

C71-1733-15Ceramic330pF±5%C47.48

C48-1710-25Film1000pF±10%C51,52

C91-0062-05Film100pF±5%C57

C90-0398-05Electrolytic 1JLF50WVC58

C52-1756-16Ceramic560pF±10%C59,60

C54-2710-39CeramicO.OlJLF+ 100%-0%

-

E06-051O-05DIN connector-E13-0811-05Phono jack (8P) x 2

VR1,2

R12-0502-05Trimming potentio meter 1OOIJB

R31,3L-

R48-7233-05RN3312±5%1/4WR33,34

R48-3251-35RN51kIJ±5%1/4WR51,52

R48-7223793RN23.7IJ±1%1/4WR53,54

R48-7214713RN1.47kIJ±1%1/4WR55,56

R48- 7217823RN17.8kIJ±1%1/4WR69~72

R48- 7210-05RNlOIJ±5%1/4WR73,74

R48-3256-35RN56kIJ±5%1/4WR75,76

R48-3233-15RN330\1±5%1/4WR77,78

R47-1547-05R547IJ±5%2WR79,80

R47-5413-25R51.3kn±5%lWR81,82

R47-5412-25R51.2kn±5%lW

51

590-0012-0551ideswitch (Input selector)52

590-0013-0551ideswitch (Tape)

013~16

V01-0733-30Transistor25A733 (A) (R,O)017~20

V03-0270-05Transistor25C945 (RO)021 ~24

V01-0733-30Transistor25A733 (A) (R,O)025,26

V03-0270-05Transistor25C945 (R,O)027,28

V01-1023-10Transistor25A 1023 (R,O)029,30

V03-2378-10Transistor25C2378 (R,O)031,32

V03-2003-20Transistor25C2003 (M,L)033,34

V01-0954-20Transistor25A954 (M,L)035~37

V03-2003-20Transistor25C2003 (M,L)038

V01-0954-20Transistor25A954 (M,L)039

V04-0313-30Transistor25D313V-AL040

V02-0507-10Transistor25B507V-AL041 .42

V09-0 138-10FET25Klll (F,G)«:{

D5~12

Vll-0271-05 Diode152076015,16

Vll-0243-05 Zener diodeWZ-061017,18

V11-4103-80Zener diodeWZ-157

CONTROL PCB ASS'Y (X11-1500-11)

PARTS LIST (3)

HA-801


Re-

marks

C1.2

C46-1722-45MylarO.22IlF±5%C3A

C46-1733-35Mylar0.0331lF±5%C5.6

C46-1710-47Mylar0.11lF±20%C7~10

C71-1 71 5-05Ceramic15pF±5%C11.12

C24-1410-61Electrolytic 10llF25WVC13.14

C25-1410-67Electrolytic 10llF25WVC15~18

C46-1733-45Mylar0.331lF±5%C19~22

C46-1712-35Mylar0.0121lF±5%C23.24



C71-1727-05Ceramic27pF±5%C29.30


C24-1422-61Electrolytic 221lF25WVC33.34

C46-1768-37Mylar0.0681lF±20%C35.36


C52-1718-26Ceramic1800pF±10%C39AO

C24-1422-71Electrolytic 220llF25WVC43,44

C71-1 718-05Ceramic18pF±5%C45A6

C71-1709-02Ceramic9pF±0.5pFC49.50

C71-1707-02Ceramic7pF±0.5pFC51.52

C71-1727-05Ceramic27pF±5%C53.54

C52-1782-16Ceramic820pF±10%C55.56

C71-1710-15Ceramic100pF±5%

-E11-0060-15Headphone jack

VR1

R06-6002-05Potentiometer 250kn MN

(BALANCE)VR2R10-5003-05Potentiometer 100kn

(VOLUME)VR3AR08-30 18-05Potentiometer 10kn B x 2

(TONE)VR5.6R12-0502-05Trimming potentiometer

1oon B (Bias adj.)R31.32

R47-1527-25FP-R52.7kn±5%2WR55.56

R47-1527-25FP-R52.7kn±5%2WR61 ~64

R43-1247-15FP-RD470n±5%1!4WR67.68

R47-1522-25FR-RF2.2kn±5%2WR69.70

R43-1275-05FR-RD75n±5%1!4WR71 ~74

R43-121 5-1 5FP-RD150n±5%1!4WR75~78

R48-6213-35RN13kn±5%1!4W

S1

501-1056-05Rotary wafer switch (MODE)S2~4

533-2041-05Lever switch (DC COUPLED.ATT. LOUDNESS)S5

533-4019-05Lever switch (TONE)

01.2

V09-0137-40FET2SK150A (Y.GR)*03A

V03-2291-10Transistor2SC2291 (G.H)*05.6

V03-2259-10Transistor2SC2259 (G.H)*07~10

V01-0206-05Transistor2SA899 (BV)011.12

V01-0209-05Transistor2SA899 (V)013.14

V03-1904-10Transistor2SC 1904 (V)

D1.2

V11-4100-30Zener DiodeWZ-197D3A

V11-0279-05Zener DiodeWZ-280D5.6

V11-4103-60Zener DiodeXZ-051D7.8

V11-4100-30Zener DiodeWZ-197

D9.10

V11-0271-05Diode1S2076D11~14

V11-0051-05Diode1N60

IC1.2

V30-0264-10ICHA 1457

11

lIDCIRCUIT DESCRIPTION (1)

This manual explains the newly developed tone controlcircuit and protection circuit (IC).

For other circuits such as the current mirror circuit.

cascade amplifier, Darlington amplifier, and current source,refer to the following manuals:

Current mirror circuit:

Darlington amplifier:

Cascade amplifier:Current source:

CIRCUIT DESCRIPTION

L-07C

L-07ML-07C

L-07C, L-07M

level (dB) BASS TREBLE

o~ +1200o~ +1200

&+9 taO~+90°

o~ +900+6 b8= +60Q c0= +600

TREBLE or

8= +300d

0+300BASS CONTROL

Of

eo~ - 300 fo 300

-3 O~ -6000=-60'°

9 -6 O~ _900O~-90°

e~-1200---

----0= -120°I Frequency (Hz)100

1K10K

TONE CONTROL CIRCUIT

~e

C15.33

f-R15:.::~~:.::NI()""!

Q:"":

-t 100 6 3

5.6K.,-C13

CD'"

~~

~00.C5.1 5 10 25VQ:

.mi(f}<;?

."._ ...J1 +

« <:r Q::':: ID>0 w

~~

7 8ID r<1:.:: ~ 0::Q:I() I-> .,-R17

"':.::NI()Q:"-:

C11 +

C17.33R255.6K

10 25V

Fig. 1 TONE amp

Fig. 2-1 Frequency response of BAX-type circuit

level (dB) BASS TREBLE

o~ + 1200

O~+120°+9

a

&o~ + 1900O~+90°

+6

b

o ~ + 600O~+60°

c+3 o~ +300 o~ + 300TREBLE or

dBASS CONTROL

0 e-3o~ -300 O~ -300

f o ~ - 60°O~-60°

-6 9O~ -900O~ -900

-9h

o~ -1200e~ -1200

Frequency (Hz)I

II100

1K10K

Fig. 2-2 Frequency respons of "KA-801" circuit

TREBLE CONTROL

Figure 3-1 shows the TREBLE section of the tone control

circuit. and Figure 3-2 is an equivalent circuit which explains

its operation The 10 kll VR is divided into two VRs CD and® . where CD + ® = 10 kll. Figures 4-1 to 4-3 show theequivalent circuit and its performance when the TREBLE

control is set to its mid-range (zero) position. The frequency

responses of N F-section (between CDand ®) and RC-section(between ® and @) are shown in Figure 4-2. and the

overall response (betweenCD and @) is shown in Figure 4-3.

BAX-type (one NF-type) and RC-type circuitry is used inthe tone control circuit.

The BAX-type circuitry has the advantages that:

(1) High output voltage.(2) High SIN and low distortion.

On the other hand. it has disadvantages. including,

(1) Requires an input buffer due to the low and varying inputimpedance.

(2) Unsmooth variation of tone control characteristics as

shown in Figure 2.

(3) Phase inversion of output signal.The RC-type circuit has the advantages that:

(1) Smooth variation of tone control characteristics

(2) Stable operation.

However, it has disadvantages the following:

(1) Large insertion loss and poor SIN.

(2) It requires a flat amplifier with approximate 20 dB gain.The tone control circuit used in the KA-801 has all the

advantages of BAX-type and RC-type circuits mentioned

above, and at the same time. the disadvanges are all eliminated.

The tone' control circuit is called a uN egative-Feedback

RC-type" and its superior performance is achieved by using alinear IC with non-inverted and inverted input with high inputimpedance,

+ 5.6K

1.5K

12

Fig. 3-1 Tone control circuit (TREBLE section)

CIRCUIT DESCRIPTION (2)~.~=. ====~amI

Fig. 3-2 Equivalent circuit of TREBLE section

As shown in Figure 4-2, the NF-section produces highgain in the higher frequency range, which is cancelled by thelow gain produced by the RC-section. Thus, a completely flat

frequency response in the TREBLE range can be obtained asshown in Figure 4-3.

~ :S.6K

J-VVv-- .--.D

I

- I

:" !.5K"': 1""f·0'2 I 1

I

I.SK I '2",I \6J .--_>

CD I _/-----

, IOK!l!'3J/1--"',- __ -- - I

I

~----.-II ~

N F-section RC-section

dB

+---- 5.6K.--{)

~

I 11.:'K

I

TO.OI2

OO'{

I

I

1<0°'

15K

1

II10KI

N F-section

I

RC-section ..I I

o37dB

dB

Fig. 5-1 Equivalent circuit for lower TREBLE controlsetting

Figures 5-1 to 5-3 show the equivalent circuit andperformance the TREBLE control when it is set to a lower

position In this case, the NF-section increases the gain by asmaller amount in the higher frequency range, whereas theRC-section decreases the gain by a greater amount as shown

in Figure 5-2. Thus, decreased frequency response in the

TREBLE range can be obtained as shown in Figure 5-3

@-()

1.5K

I

®: 5.6K

!II

I

I

: {~0.012

I

I

I 5K

i RC-section

5.6K

N F-section

+

0.0121

I.SK

5

CD

Fig. 4-1 Equivalent circuit for flat TREBLE

f

Fig. 5-2 Frequency responses of N F-section (above)and RC-section (below)

dB

o+5.8dB

o - 15.6dB

dBdB

o -5.8dBo

Fig. 4-2 Frequency response of N F-section (above) andRC-section (below)

dB

Fig. 5-3 Overall frequency response with lowerTREBLE setting

/---- --/o

\ '-------

Fig. 4-3 Overall frequency characteristics of flatTREBLE control

In the opposite way, when the TREBLE control is boosted,

the NF-section increases the gain by a larger amount in thehigher frequency range, whereas the RC-section decreases

the gain by a smaller amount, obtaining the increased

frequency response in the TREBLE range as shown in Figures6-2 and 6-3.

CIRCUIT DESCRIPTION (3)

dB

z,

5.6K

1.5K

0.33"""I 5.6K

5.6K

CD

r.5K

N F-section

5.6K

"'[

I

I

I

033 I r

I

I

I

I

1

, -1-, / I

0,.-/ I

I

~--_---~/I~RC-section

0--@

1.5K

o~I:KIN F-sectionIon)

CD

Fig. 6-1 Equivalent circuit for boosted TREBLE control~

,I

15.6dB

oFig. 7 Tone control circuit (BASS section)

f

dB

-3.7dB

Figure 8-1 is an equivalent circuit showing conditionswhen the BASS control is set to its mid-range (zero)

position. The NF-section increases the gain and theRC-section decreases the gain in the BASS range. obtaining

the completely flat frequency response as shown in Figures8-2 and 8-3.

o

CD

'0.33

@5.6K

5.6K1.5K

Fig. 6-2 Frequency responses of N F-section (above)and RC-section (below)

dB; /

o I .J1=B'-- - - - - - ---

0.33

1.5K

5K

'--...-------J r ~

NF-section RC-section

Fig. 8-1 Equivalent circuit for flat BASS

Fig. 6-3 Overall frequency response with boostedTR EBLE control

BASS CONTROL

dB

o

Figu re 7-1 shows the BASS section of the tone controlcircuit. and Figure 7-2 is the equivalent circuit which explains

its operation. The 10 k\J VR is divided into two VRs CD and®. where CD + ® = 10 k\J.

0.33dB

5.6K 5.6K

1.5K01 -6.ldB

~

1.5K

rOKISI

J.5.6K

0.18

5.6K

:J Fig. 8-2 Frequency responses of NF-section (above)and RC-section (below)

13


dB i dB

o LI ------.:)7-----/----

-13.9dB

o

Fig. 8-3 Overall frequency response with flat BASScontrol

Fig. 9-3 Overall frequency response of decreasedBASS control

The low range level is decreased when VR1 is larger than

5 k~l and the level reaches its minimum at VR1 = 10K and

VR2 = 0 as shown in Figure 9-1.

In this case, the low range is not the increased by greatly

by the N F circuit but it is decreased greatly by the CR circuit

as shown in Figure 9-2, resulting in decreased overall

response at the lower range as shown in Figure 9-3.

The low range level is increased when VR2 (10 kQ) is

larger than 5 kQ and VR 1 is low. The level reaches its

maximum at VR 1 = 0 and VR2 = 10 kQ as shown in Figure

10-1. The low range is greatly increased by the N F circuit

but is not increased so much by the CR circuit as shown in

Figure 10-2, resulting in the increased overall response at

the lower range as shown in Figure 10-3.

0.33

I

II

I

I

II

I

I

I

I

I

~ I '---v-------l

10K

1.5K

5.6K

0.33

o

1.5K

0.33

~~@ fl.5K

f

5.6K

-1~

10K

1.5K

CD

N F-section RC-section N F-section CR-section

Fig. 9-1 Equivalent circuit for decreased BASS controlFig. 10-1 Equivalent circuit for boosted BASS control

dBdB

o3.8dB

o17.7dB

dBdB

o -17.7dB-3.8dB

OJ ' /

Fig, 9-2 Frequency responses of NF-section (above)and RC-section (below)

Fig, 10-2 Frequency responses of N F-section (above)and RC-section (below)

14


dB

o

Fig. 10-3 Overall frequency response with boostedBASS control

PROTECTION CIRCUIT (lC: HA12002)

This integrated circuit protects the loudspeakers and

power amplifier. The IC consists of a zero-potential detector,overheating detector, line voltage detector, and relay driver,the KASOl uses only the zero-potential and line voltagedetectors.

ZERO-POTENTIAL DETECTOR

OVERLOAD DETECTOR

The overload signal is applied to Pin 6. A pair oftransistors, 07 and OS, forms a flip-flop, and the collector ofthe 07 is connected to the base of inverter 06 through R3.

Normally, the base of 07 is supplied with a higher voltagethan that supplied to the base of OS (the base voltage of 07

is supplied from the anode of OS, whereas the base voltage

of OS is supplied from the cathode of OS), so 07 is ON, andOS is OFF. Thus, 06 is OFF.

When the positive overload signal is applied to Pin 6, OSturns ON and the collector voltage drops. The base voltage

of 07 also drops because of its connection to the collection

of OS through R5, so 07 is turned OFF The collector

voltage of 07 rises, which raises the base voltage of 07through R3, and OS remains ON.

Diode DO, connected to Pin 6, cuts the negative input

voltage applied to the base of OS, so that OS is preventedfrom turning OFF.

Accordingly, once a positive overload signal is applied tothe circuit. the circuit condition is locked until the power is

turned OFF.

LINE VOLTAGE DETECTOR

To relay

0;,i.:6>,.

VCC08 (stabilized

20-50V)R8

.®.®Do

Overload

signal

The time constant of .the ripple filter consistsing of R42and C32 is set to a low value so that the voltage at Pin 5

drops to a negative level immediately after the power is turned on and is set to Zero immediately after the power is tur

ned off (resulting from rapid discharge).

The negative voltage from Pin 5 is applied to the cathode

of 07 through R24 together with another positive power

voltage which is applied through R23. The cathode voltageof 07 is normally about -05V, so 09 and 010 are keptOFF.

When the line voltage is switched OFF, the voltage at Pin

5 falls to OV quickly, and only the remaining positive power

voltage is applied to the cathode of 07 through R23. Thus,09 and 010 are turned ON.

03

D4 '\1>R20

I

03R2

R25 r

Q)o

tlr ... }04 ;> R 1®

0102

Fig. 11 Zero-potential detector

Pin 3 or Pin 4 is used to detect zero-potential where 04,Oland 03 are all cut-off.

When a voltage higher than + O.5V is applied to pin 3, 04turns ON and then 01 and 03 also turn ON. Diodes 03. 04

and 010 remain OFF.

When a voltage lower than -0.3V is applied to pin 3,diodes 03 and 04 conduct and the current is supplied to the

base of 01, turning 01 and then 03 ON.

R21

1.3V

Fig. 12 Overload detector/Line voltage detector

15

~ -- -(i '~.co,.,.-. ,

[ KI-8otCIRCUIT DESCRIPTION (6)

RELAY DRIVER AND VOLTAGE STABILIZER

D9

R27

017

Zl

RI3

~,,5S J_~abilizec!

DC voltage

DI

The DC power voltage supplied to the whose circuit

except the relay driver is stabilized using 017, R15 and Zl,

and further made accurate by D 1 and D2 to become + 1.3V.

The output of 013 in Figure 14 is connected through R13to emitter follower 015, which drives 016

Pin 1 is the output terminal of the relay driver.

Transistors 03, 06 and 010 are provided with common

connected collecters and emitters. The collector voltage inthe normal state is about O.6V. (Here, we call this voltagelevel "H")

If a voltage higher than O.6V is applied to the base of 03,

03 turns ON, and the collector voltage falls to about O.1V.(We call this voltage level "L")

The same result is obtained when level "H" is input to the

base of 06 or 0 10 instead of 03, and the output becomes"L".

This kind of circuit with multiple input terminals and a

single output terminal, the output being "H" when all inputsare "L", and the output being "L" when at least one input is"H", is called a NOR gate. The NOR gate is generally

expressed with a logical symbol, and the relation betweenmultiple inputs and single output is presented in the "truth

table". shown in Figure 13.

NOR GATE AND POWER-ON POWER

CIRCUIT

Input Output

~~A

"L'" 0.3V or lower

"H": OAV or higher

InputOutput

a

bc A

L

LL H

H

LL LL

HL L

H

HH L

Fig, 15 Relay driver and power stabilizer

Logical symbol Truth table

Fig, 13 Logical symbol and truth table of NOR gate

In Figure 14, the positive feedback is applied from theem itter of 013 to the base of 011 through R19 and the

diode, in order to speed up and also stabilize the operation of011,012 and 013.

For the power-ON muting circuit. resistors Rs and Rx and

capacitor Cs are connected to Pin 8. Among the sixtransistors only 013 is delayed in turning ON, since

increasing the base voltage takes time as Cs is charged

through Rs.

Rs

03 06 010 Oil 012

+8

-.. + B{ZO-v50V)

To relay driver

Fig, 14 NOR gate and power-ON muting circuit

16


+Vcc45v

03

oIi:

R235t R24

R109100K

+(S~hU

Over .Ioad detector 19terminal C!:

r-------IIIIIIIII 01 011 07

L _

r-_- t::::1I r -_- -r.~:lI .II

I~III~II~IL -~ L:__ -=.::':.1

L ch R ch

Pin 3 and Pin 4 have same characteristics. When an external circuit consisting of R104. R105 and C104 is connected to either pin. it detects themid-point voltage and when an external circuit consisting of the thermistorsand C105 is connected. it detects the temperature (of the power transistors).

<HA12002 equivalent circuit>

17

ADJUSTMENT

PREAMP OFFSET VOLTAGE ADJUSTMENT

VRI

:c.~.~~/ 8

~l/~"h/Ad'Justment tool OFFSET VOLTAGadjusting point. E

1 Decline the rear panel.2. Connect a dc voltmeter to the adjusting points 7 and 8

(9 and 10) of the preamp pc board ass'y (X08-l 660-10)3. Adjust the trimming pot VR 1 (VR2). as shown in figure 1,

for OV reading of the dc voltmeter.

POWER METER LEVEL ADJUSTMENT

Connect an AG and dummy load to Aux jack and speakerterminal respectively

2. Connect an AC voltmeter across the dummy load.3 Adjust the trimming pot VR3 (VR4). when the' AC

voltmeter Indicating, 28.28V, for 100W reading ofpower meter.

Preamp pc board ass'y(XOS-, 660-' 0)

Fig. 1. Preamp offset voltage adjustment. ~

Trimming pot. VR4

8BIAS CURRENT {adjusting point. 81

Trimming pot. VR'

L-ch

8} BIAS CURRENT81 adjusting point

Trimming pot. VR2

Trimming pot. VR3

R-ch

Fig. 2. Power amp offset voltage adjustment.

18

POWER AMP OFFSET VOLTAGE

ADJUSTMENT

1. Remove the front panel.2. Connect the dc voltmeter between the positive and

negative speaker terminals3. Adjust the trimming pot VR5 (VR6). as shown in figure 2,

for a OV reading of the dc voltmeter.

BIAS CURRENT ADJUSTMENT

1. Turn the volume control knob fully counter clockwise.2. Connect the dc voltmeter between the adjusting points

18 and 20 (27 and 29) of power amp pc board ass'y(X07-1640-10)

3. Adjust the BIAS CURRENT trimming pot VR 1 (VR2). foran 18 mV reading of the voltmeter

"II II

OJ'H,Trimming pot. VR5~(VR6 is located below VR5)

(f)KENWDDD _

~

~

c~~r~'~~:.~~ R1;. "

I

~o

0] CEI• Ri'

ROO '00 " ~

I~~~b1110uTPUTILI

c

'"1QOOP

Rge 330

C2610 sov

r-@

2SA733A (R,OI2SC945fR,QJ

2SA1023( R,012SC2378fR,Q)2SC2003( M,L)

. 2SA954 (M,L!

011-16,21- 24Q17_20,25,26027,28029,30Q31,32,35 ..•..37Q33,34,38

R" 39",~R93OO0' rR92390K

R9'WOK

039 25D313 V-AL040

25B507 V-AL041,42

2SK111 (F,G)

2SA850

2SA8392S8507V2SA8992SC25592SK150A"PA68H2SKlli2SC1735

2SA9132SC16692SC19042SC2291" 2SD313V 2SC1913

~~~,~, ~

~"' G D,

, C S'NS, ,

.e SIG'DJD]GJSjNS2 2 G SINC345D, ,

-I-

I

I

I

I

I

I

I

IL _

r PLAYA

I

~PHONO 1

rz.-smYl 1=-PHONO 2INPUT TUNER

AUX J-

PHONO 1

REC r~__TAPE r.qr-

[PLAY ~-~-

I REC

I lI

r",,~1l-PLAY

'TAPE

IREC

LPLAY

r '"TUNER

INPUT

PHONQ 2

2SA733A 2SA992 2SCI7752SA777 25Al023 2SC18452SA872 2SC945 2SC19802SA921 2SC1509 2SC2003

2SA954 ,:378E C

PREAMP (X08-1660-10)1- - ---I

I

A

5,

TAPE. MONITOR

SOURcrI

A rUWC)/B PLAY

,+,!B.M)-

A...•S/15.M)

2

4

6

25All071212SC2587 121

HIGH SPEED DC INTEGRATED AMPLIFIER

54

(J25-'597-03) (A/4),------,I

+-,'"

--'

+-,<!--'

L ---IR<h

(K,P) TYPE

L<h

SP[t..£RS

WZ -197

WZ-28D

WZ-051IS 2076IN60

. WZ-182

2SK150AiGR,Y)2$C2291 (G,H)2SC2259(G,H}2SA8991B,V)25A899 (V)25C1904(V)

: HA1457

01,2,7,BD3,4

D5.609,10011 ...•....14015,16

01,203,405,607 .....10011,12

013,14IC1,2

'c.13r---+-

09 : WZ-050011 \8 :GP25D or U05C{SI

2SA733A(R,Q)HA1200ZTA7318P

07- to

IC,

ICZ

(J25-1GOG-03) (A/4~ 0/4)

---11.1_--

25K111

~,~J.X~o

HA 12002 HA 1457 TA7318P

IER

(KA-BD11) A-801

±7.5 dB at 100 Hz±7.5 dB at 10.000 Hz+9 dB at 100 Hz(at - 30 dB VOLUME Level)

200 mV/33011.... 300 mV/80kQ

.... RIAA standard curve ±0.2 dB(20 Hz to 20.000 Hz)

Weight (Net) .....

GENERALPower Consumption 710 watts at full powerAC Outlet Switched 2. Unswitched 1Dimensions. W 440 mm (17-10/32")

H 153 mm (6-6/32")D .407 mm (16-6/32")17.5 kg (38.6 Ibs.)

Tone Control:BassTreble

Loudness Control

Output Level/Impedance:Tape REC (Pin) .

(DIN) .Frequency Response for

Phono ...

Tuner, AUX,Tape A, B 105 d8 for 200 mV input

Max. Input Level for Phono 230 mV (RMS), T.H.D. 0.015% at1,000 Hz '"

Power Output110 waUs* per channel minimum RMS, both channels driven,at 811from 20 Hz to 20,000 Hz with no more than 0.015% totalharmonic distortion.

Both Channels Driven 115 + 115 watts 811at 1.000 Hz130 + 130 watts 411at 1.000 Hz

Total Harminic Distortion (20 Hz to 20,000 Hz):AUX Input to

SPEAKER Output 0.015% at rated power into 8110.008% at 1/2 rated power into 811

PHONO Input toSPEAKER Output.. 0.015% at rated power with

VOLUME -20 dBIntermodulation Distortion. 0.003% at rated power into 811

(60 Hz: 7 kHz = 4 : 1)Damping Factor. 100. DC ~ 20.000 Hz into 811Transient Response:

Rise Time 0.8/lsSlew Rate ±150 V//lS

Power Bandwidth 5 Hz to 70.000 Hz at 0.03% T.H.D.Frequency Response:(DC COUPLED at ON) DC to 400 kHz, -3 dB(DC COUPLED at OFF) 18 Hz to 400 kHz. -3 dB

Speaker Impedance Accept 411to 1611Input Sensitivity/Impedance:

Phono 2.5 mV/50kllTuner. 200 mV/50kllAUX 200 mV/50kllTape A, B 200 mV/50kll

Signal to Noise Ratio (lHF. A):Phono 90 dB for 2.5 mV input

96 dB for 5.0 mV input102 dB for 10 mV input

* Measured pursuant to Federal Trade Commission's TradeRegulation rule on Power Output Claims for Amplifier in U.S.A.

Note: Kenwood follows a policy of continuous advancements indevelopment. For this reason specifications may bechanged without notice.

SPECIFICATIONS

AC24QV50/60Hz

(J25-'597-031(Cf4)

AC120V

60Hz

IT) TYPE

(J 1 TYPE

G

5,53

s.

WZ -197WZ-280WZ-051IS 2076IN60

. WZ-182

2SK150A 1GR, YI2SC22911G,H)2SC22591G,H)2SA8991B,VJ25A899(V)25C1904(V)

: HA1457

5.

01,203,405,607-10011,12

013,14IC1,2

L --.J

01,2.7,B03,405,609,10011",,14015,16

I

IL -1(D/4)

5.

I,"!

54

..:

51KA- 801 (K)

DC voltage measured with 20 kilN VOM under no signal.

23

IPC BOARI

Preamp, (X08-1660-1 0) (Foil Side)

OFFSET VOLTAGE ADJ

u

024

w

o

--£>o

qv 13

:~1'0I '

1I.I~1,

1

II

1

~I~I

~I'I 1

I II

1,r

8

7

~~e

Control (X11-1500-11) (Fe

-'M-R2 2.2K

,

~L-11-

C20.012

ITREBLE I FL--tl-

C2! ,012

$2r---'I II I1 I

1 1

1 I

1 I

I, :I I1 IL ~

4'I"1~'

G-G-G-T u@ ® ©

II-I'I1

C~~ lOOP

-II-

..•.. ---

C~6 100F'

-II-2SK150A (GR, Y)2SC2291 (G, H)2SC2259 (G, H)2SAS99 (B, V)2SAS99 (V)2SC1904 (V)HA1457WZ-197WZ-2S0WZ-051lS20761N60WZ-182

Ql,2Q3, 4Q5,607~1O'Qll, 12Q13, 14IC1, 201.2,7,S03,405, 609, 10011~14015, 16

2S0313V-AL2SB507V-AL2SKlll (F, G)lS2076WZ-061WZ-157

Q39Q40Q41,4205~12015, 16017, 18

2SA733A (R, Q)2SC945 (R, Q)2SA 1023 (R, Q)2SC2378 (R, Q)2SC2003 (M, L)2SA954 (M, L)

Q13~16, 21 ~24Q17~20, 25, 26Q27, 28Q29, 30Q31, 32, 35~37Q33, 34, 38

.~

PC BOARD

2SK111

HA1457

2SK150A2SC9452SC20032SC2378

~EBC

'BE

~~

2SA8992SC1904

2SC25592SC2291

2SB507V2SD313V

2SA733A2SA9542SA1023

,

~I~,~II

1

I , II1

1II. I0II1/'.1I~ 1;1 ;,

I I~ 1I1 11 I01 1~I 1I

1

1,

1.' , ~I., 1~I.1

~I1~II1

I1I

1I II

1

1IB

J24 J23

w

o

-Qo

~••.. 13

i···~'''0

: x

-1500-11) (Foil Side)

52

r---"I 1

1 I

I I1 I

I II 1I II II IL J

50r---"I II II II I

: :!I I gI I ~L J .•

21

Power Amp. (X07-1640-1 0) (Component Side)

IDBIPC BOARD/SEMICO

o24 :;

BIAS CURRENT ADJ. (1B m~~ •

IC2

RL'

R3939K==j"'3

~~Y;;"

0:::._ 39K Q::

~I

22

Q1,2Q3, 4Q5, 6, 11, 1207~10IC1IC201~405,607, 809011 ~18

2SC1913 (R, Q)2SA913 (R, Q)2SC945 (R, Q)2SA733A (R, Q)HA12002TA7318PlS2076AlS2076W06BWZ-050GP250 or U05C(S)

Semiconductor NameSemiconductor Substitutions

2SA1107 (2)

-2SC25B7 (2)

-(X07-1640-10) 2SA733A (R, Q)

2SA992 (E,F). 2SAB72 (D,E). 2SA921 (S,T)2SA913 (R,Q)

-2SC945 (R,Q)

2SC1980 (S,T). 2SC1845 (F,E). 2SC1775 (D,E)2SC1913 (R,Q)

-HA-12002

-TA-7318P

-(X08-1660-10)

2SA733A (R,Q)

2SA992 (E,F), 2SA872 (D,E), 2SA921 (S,T)2SA954 (M,L)

2SA850 (D,E), 2SA777 (Q,R)2SA 1023 (R,Q)

2SA872 (D,E). 2SA992 (E,F)2SB507V-AL

2SA839 (Q,Y)2SC945 (L) (R,Q)

2SC1980 (S,T). 2SC1845 (F,E), 2SC1775 (D,E)2SC945 (R,Q)

2SC1980 (S,T). 2SC1845 (F,E), 2SC1775 (D,E)2SC2003 (M,L)

2SC1735 (D,E). 2SC1509 (Q,R)2SC2378 (R,Q)

2SC1775 (D,F). 2SC1845 (F,E), 2SC1980 (S,T)2SC2385 (F,G)

-2SD313V-AL

2SC1669 (0, Y)2SK111

-(X11-1500-11 ) 2SA899 (B,V)

-2SA899 (V)

-2SC1904 (V)

-2SC2259 (G, H)

-2SC2291 (G, H)

-2SK150A (Y,GR)

IlPA68H (L.M)HA-1457

-

Elm,ONDUCTOR SUBSTITUTIONS

J24 ,

c~<t~+,0' 500V u~.J::::=J~~16

c~

I I 01 500V~J27 018

2SA733A2SC945

~EBC

33clH(( ( (}) I 'I c&BIAS CURRENT ADJ. (1B mY)

2SA913

~

2SC1913

~E

aHA 12002

~

1 1:>\

I

8

I

TA7318P

J~

• 7

••

'-"ov

~, ,

11

&

J23

N,

9l±E>OJ25

F4SA 250V

F2SA 250V

o,

~

J25-1597-03 (Foil Side)16

r--------lI II AC OUTLET :

-----, L J,,L. -:- -~••r-------, '

I I:I 1'-__I I r---"cl':...----,L ..J I r J2..? __ I JIG

------------ir------------,I I 13 9 11 Ir-------l I' 0 0 0 i

I I IiI I : I 12

I I ':0L,==-=---=r=== :1:: ==- =- =- -=- -= -=- -=-=-~ _~J

I I

rA-$P

~

R5 10 2W---'M-

14o10o6

o

S4SPEAKER

~------------~~---------I R2 4.7 1W --iR6 10 2W_ -'00'- '-----w.-------

L2 ~~\ 1&<>~~ 6405 6 a-so

~~l70 ~J«~1 ~

-- -----jr---- -- I,

, -1I q

, -T- ~~ __ ..J U

16

o

26o

15

0170

160

190

200

210

220

230

240

250

25

'5

'20

26

AC'20V ~j"'''' ;: :!

60Hz

S1

C2 .01

J'

kenwood ka801 integrated amplifier service manual

Documents