Read Harman Kardon HK 990 (serv.man2) Service Manual online
Speaker Board
In Board
Seaker Board
Head Phone
Led Board
Display Board
Fuse Board
Preamplifer Board
AMP
left
power
Thermistor
Thermistor
Transformer
Power Cord in
Sp1+ Sp1- Sp2- Sp2+
1 2 3 4
7P J1
JP1
JP2
JP10
JP8
JP4
JP7
JP6
JP9
JP3
JP5
AMP
right
power
7P J1
JP1
JP2
JP10
JP8
JP4
JP7
JP6
JP9
JP3
JP5
Sp1+ Sp1- Sp2- Sp2+
1 2 3 4
3P
5P CN12
4P
CN3
5P
CN12
4P
CN13
6P
CN2
4P
CN4
7P
CN1
5P
CN3
2P
CN7
2P
CN8
2P
CN9
2P
CN10
5P
CN11
7P
CN6
7P
J2
7P
J3
3P
5P
J11
4P
J14
5P
J13
6P
J12
6
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