Kenwood KGC-4042-A Service manual

GRAPHIC EQUALIZER

KG C-4042A

SERVICE MANUAL

C

2001-8 PRINTED IN JAPAN
B51-7838-00 (4) 3395

REVISED

Knob (FAD)
(K29-5541-08)

Trim plate
(A21-0474-03)

S/No. 10700001~

Panel ass’y
(A64-0071-08)

Knob (EQ)
(K24-0700-08)

Knob (SUB)
(K24-0710-08)

Metallic cabinet
(A01-2568-08)

Screw set
(N99-1543-08)

Bracket
(J21-3693-04)

RCA pin cord (OUT, SUB)
(E30-3649-08)

RCA pin cord (OUT, R)
(E30-3648-08)

RCA pin cord (OUT, F)
(E30-3647-08)

RCA pin cord (IN)
(E30-3646-08)

Power connection cord
(E30-3654-08)

RCA pin cap
(F29-0049-05)

2

Lch

Rch

INPUT ISO

IC4
NJM2060M UPC4570G2

EQ

IC5

SW1

Lch EQ B.P.F

Rch EQ B.P.F

2SC2712

Q201-205

Q251-255

2SC2712

SW3

(OR)

LAMP3,4 LED1-5

LAMP1,2

(GR)

EQ

POWER

Q5

Q4

Q3 2SC2060

DTA114ES
DTC114ES

SUPPLY

2SC1741A

2SC4640Q1

Q2

ACC

GND

P. C

MUTE

DRIVE

2SA1782

Q6,7

FILTER

H.P.

SWITCHING

TR

LED6,7

A.M.P

BUFFER

SW2

WOOFER

SUB

MUTE

FILTER

L.P.

NJM2068MD

IC3

2SC3327-A

Q8,9

MUTE

NJM2068MD

IC2

2SC3327-A

Q10,11

TR

2SC3327-A

Q12

Rch

Lch

SUB

Lch

Rch

REAR

Rch

Lch

FRONT

ON

OFF

+B

OFF

ON

30~150Hz

PRE. GND

METER LED SUPPLY

K G C-4042A

BLOCK DIAGRAM

B CA D E F G H I J

PC BOARD (Component side view)

1

MAIN PWB

ELECTRIC UNIT ELECTRIC UNIT

EQ ON/OFF PWB

A

EQ ON/OFF PWB

PC BOARD (Foil side view)

MAIN PWB

CN15

R92

LAMP1LAMP2

DE

B

LAMP3 LAMP4

C

R108

CD14A

SW2

R54
R53
R55

C150

R71

R267

R266

R101

R103

R268

C259

C258

R102

R85

R100

R264

R263

C101

R88
R89

R265

C257

R86

14

R261

R260

R83

IC3

R262

C255

R99

R98

R87

R258

BEBEBEBEBE

R257

R259

R256

R84

R90

C92

R96

R124

85

R14

C91

R94

R95

R272

R255

58

IC5

14

R206

R97

C51

C100

R51

R252

R251

R21R201

R202

R1

C1

814

IC4

R4
R3

R5

R204

R203 R253

R67R17

Q255

17

R7
R6
R8

R57
R56
R58

Q251

Q254

Q252

Q253

R10R60

R269

R254

R270

C261

C260

R271

58

R64

R222

R205

R219

C210 C208

R220

R221

IC1

R107

R13

C211

R150

R9

R63

R217

R216

R218

C209

41

R12

R62

R214

BEBEBEBEBE

R213

C15

R11

R20

IC2

58

R61

C65

R59

R70

R211

R215

R212

R210

C207

14

R208

C205

R207

R82

R81

R209

R16
R15
R18
R19

R69
R68
R65

R66

Q205

Q204

Q203

Q201

Q202

2

P.CON

G1

3

4

5

VR1

FR

GND

A

Q2

EB

Q1

C203

R105

CN9

2

CN10

1

+B

EB

(SUB.W)

C202

D1

41

C81

C87

Q10

Q11

C204

C86

C82

BE

BE

C252

C16C66

(REAR)

CN2CN3

1

D3

4

D2

D7

Q7

BE

C94

C5

C11

R104

C206

CN11

CN1

C83

C93

(FRONT)

41

CN4

14

Q3

EB

C84

C85

C89

C253

C254

CN12

611616

BE

BE

Q5

BE

Q4

D4

Q6

C88

C95

C55

C256

1

Q12

BE

C61

C90

4

D5

C52

C64

C63

CN13

C14

R93

D6

C53

C96

C12C13

Q8Q9

BEBE

C3

C97

C4

SW1

C62

C54

C98

CN14

SUB

ORGR

SW3

C2

R91

9

1

R106

91

EQ ON

6

Ref. No.
AddressQ13BQ23BQ33CQ43CQ53CQ64C
Ref. No.
AddressQ73BQ84DQ95D

7

Refer to the schematic diagram for the values of resistors and capacitors.

Q104BQ114BQ12

3C

Ref. No.
Address
Ref. No.
Address

IC13IIC24IIC34HIC43GIC5

4I

Q2015JQ2025JQ2035JQ2045JQ2055JQ2514GQ2524GQ2534GQ2544GQ255

4G

Refer to the schematic diagram for the values of resistors and capacitors.

3 4