
DC520
DUAL AUTO REVERSE CASSETTE DECK
SERVICE MANUAL
harman/kardon Inc.
250 Crossways Park Drive
Woodbury, N.Y. 11797
1-800-645-7484 in the USA

CONTENTS
Specifications 2
Disassembly 3
Adjustments 4
IC Block Diagrams 10
Exploded view 1 12
Mechanical Parts List 1 13
Exploded view 2 14
Mechanical Parts List 2 15
Exploded view 3 16
Mechanical Parts List 3 17
Electrical Parts List 120v USA 18
Electrical Parts List 230v EU 25
PCB Layouts * 35
Schematics ** 39
* PC boards are viewed from the Parts side only
** When printed, Schematics are intended for use with a printer capable of printing
a 11 x 17” page or larger – if printed on a standard 8 ½ x 11 printer it may not
be legible.

DC520 PARTS LIST 120v USA
The discrete, commercially available components: RESISTORS
and CAPACITORS are included only to supply reference designators;
they may not be stocked. Obtain locally if possible, assuring the
description and value of the part is identical. Or if necessary,
call harman/kardon customer service 1-800-422-8027.
RESISTOR R-16 TP JFT 2.2K
RESISTOR R-16 TP JFT 2.2K
RESISTOR R-16 TP JFT 2.2K
RESISTOR R-16 TP JFT 2.2K
RESISTOR R-16 TP JFT 2.2K
RESISTOR R-16 TP JFT 2.7K
RESISTOR R-16 TP JFT 2.7K
RESISTOR R-16 TP JFT 2.7K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 5.6K
RESISTOR R-16 TP JFT 5.6K
RESISTOR R-16 TP JFT 6.2K
RESISTOR R-16 TP JFT 6.8K
RESISTOR R-16 TP JFT 6.8K
RESISTOR R-16 TP JFT 7.5K
RESISTOR R-16 TP JFT 8.2K
91131020-50 RESISTOR R-16 TP JFT 18K 2.000 R127, 227

RESISTOR R-16 TP JFT 100K
RESISTOR R-16 TP JFT 100K
RESISTOR R-16 TP JFT 120K
RESISTOR R-16 TP JFT 120K
RESISTOR R-16 TP JFT 120K
RESISTOR R-16 TP JPT 130K
RESISTOR R-16 TP JPT 130K
RESISTOR R-16 TP JPT 130K
RESISTOR R-16 TP JFT 150K
RESISTOR R-16 TP JFT 150K
RESISTOR R-16 TP JFT 150K
RESISTOR R-16 TP JFT 150K
RESISTOR R-16 TP JFT 180K
RESISTOR R-16 TP JFT 180K
RESISTOR R-16 TP JFT 220K
91112520-00 RESISTOR ARRAY 100K*10 1.000 R61

RESISTOR R-16 TP JFT 4.3K
RESISTOR R-16 TP JFT 4.3K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 6.8K
RESISTOR R-16 TP JFT 6.8K
RESISTOR R-16 TP JFT 2.7K
RESISTOR R-16 TP JFT 100K
RESISTOR R-16 TP JFT 240K
RESISTOR R-16 TP JFT 470K
C,CERAMIC TP 100P 50VK SL
C,CERAMIC TP 100P 50VK SL
C,CERAMIC TP 100P 50VK SL
C,CERAMIC TP 150P 50VK SL
C,CERAMIC TP 330P 50VK SL
C,CERAMIC TP 560P 50VK SL
C,CERAMIC 0.01UF 50V Z YF
91158188-20 C,CERAMIC 0.01UF 50V Z YF 2.000 C313, 314

C,CERAMIC 0.01UF 50V Z YF
C,CERAMIC 0.01UF 50V Z YF
C.CERAMIC 0.047UF/50VZ YF
SPARK KILLER 0.0047M 250V

91431710-00 PLUG CONNECTOR B3B-EH 3P 1.000 P305

PIN JACK, 4P(YKC21-0066B)
WIRE CONN,11P(52004-1110)
WIRE CONN,13P(52004-1310)
92602744-01 PUSH BUTTON (FF/REW) 1.000

SCREW,C-TITE M3*8(NI-BLK)

DC520 PARTS LIST 230v EU
The discrete, commercially available components: RESISTORS
and CAPACITORS are included only to supply reference designators;
they may not be stocked. Obtain locally if possible, assuring the
description and value of the part is identical. Or if necessary,
call harman/kardon customer service 1-800-422-8027.
RESISTOR R-16 TP JFT 2.2K
RESISTOR R-16 TP JFT 2.2K
RESISTOR R-16 TP JFT 2.2K
RESISTOR R-16 TP JFT 2.2K
RESISTOR R-16 TP JFT 2.2K
RESISTOR R-16 TP JFT 2.7K
RESISTOR R-16 TP JFT 2.7K
RESISTOR R-16 TP JFT 2.7K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 5.6K
RESISTOR R-16 TP JFT 5.6K
RESISTOR R-16 TP JFT 6.2K
RESISTOR R-16 TP JFT 6.8K
RESISTOR R-16 TP JFT 6.8K
RESISTOR R-16 TP JFT 7.5K
RESISTOR R-16 TP JFT 8.2K
91131040-50 RESISTOR R-16 TP JFT 22K 1.000 R351

RESISTOR R-16 TP JFT 100K
RESISTOR R-16 TP JFT 100K
RESISTOR R-16 TP JFT 120K
RESISTOR R-16 TP JFT 120K
RESISTOR R-16 TP JFT 120K
RESISTOR R-16 TP JPT 130K
RESISTOR R-16 TP JPT 130K
RESISTOR R-16 TP JPT 130K
RESISTOR R-16 TP JFT 150K
RESISTOR R-16 TP JFT 150K
RESISTOR R-16 TP JFT 150K
RESISTOR R-16 TP JFT 150K
RESISTOR R-16 TP JFT 180K
RESISTOR R-16 TP JFT 180K
RESISTOR R-16 TP JFT 220K
RESISTOR R-16 TP JFT 2.7K
91131180-50 RESISTOR R-16 TP JFT 82K 1.000 R1

RESISTOR R-16 TP JFT 100K
RESISTOR R-16 TP JFT 240K
RESISTOR R-16 TP JFT 470K
RESISTOR R-16 TP JFT 4.3K
RESISTOR R-16 TP JFT 4.3K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 4.7K
RESISTOR R-16 TP JFT 6.8K
RESISTOR R-16 TP JFT 6.8K
C,CERAMIC TP 100P 50VK SL
C,CERAMIC TP 100P 50VK SL
C,CERAMIC TP 100P 50VK SL
C,CERAMIC TP 150P 50VK SL
C,CERAMIC TP 330P 50VK SL
C,CERAMIC TP 560P 50VK SL
91158188-20 C,CERAMIC 0.01UF 50V Z YF 2.000 C119, 219

C,CERAMIC 0.01UF 50V Z YF
C,CERAMIC 0.01UF 50V Z YF
C,CERAMIC 0.01UF 50V Z YF
C.CERAMIC 0.047UF/50VZ YF
SPARK KILLER 0.0047M 250V

REEL SUB ASSY R 220934151
92783346-00 SPRING HEAD (01-080-4251) 1.000 61

SPRING REEL L 01-081-4257
SPRING P.A.L(01-082-4253)
SPRING REEL R 01-081-4258
92783327-00 ARM BRAKE (22-239-3028) 1.000 28

REEL SUB ASSY R 220934151
SPRING HEAD (01-080-4251)
SPRING REEL L 01-081-4257
SPRING P.A.L(01-082-4253)
SPRING REEL R 01-081-4258
91070619-00 3P DECK 1 HEAD WIRES, 1.000 P301

PIN JACK, 4P(YKC21-0066B)
WIRE CONN,11P(52004-1110)
WIRE CONN,13P(52004-1310)
92602736-00 PUSH BUTTON (POW) 1.000

SCREW,C-TITE M3*8(NI-BLK)