Harman Kardon HK680 Technical Manual page 15

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PCB-6 Pos.
Primary P. C. Board Tone Control P. C. Board
BALANCE
10036080
TREBLE
Remote In/Out P. C. Board
BASS
Mono/Stereo Switch P. C. Board
-
MONO
TONE 3
DEFEAT g
10035020
L514 R520
H513