Sherwood R-772 Service Manual page 18

Audio/video receiver
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4. Key Table
IN
OUT
0V~0.14V
0.15V~0.47V
0.48V~0.85V
0.86V~1.2V
1.21V~1.6V
1.61V~2.02V
2.03V~2.4V
KEY IN 1(pin90)
PRESET UP
SW717
PRESET DOWN
SW714
TUNE UP
SW711
TUNE DOWN
SW708
MEMO/ENTER
SW705
ROOM2
SW703
AUDIO
SW701
KEY IN 2(pin91)
CONTROL UP
SW718
CONTROL DOWN
SW715
CH_LEVEL
SW712
OSD SETUP
SW709
SPK_ON/OFF
SW706
17
KEY IN 3(pin92)
TUNER
SW719
EXT_IN
SW716
AUDIO
SW713
VIDEO
SW710
STEREO
SW707
SURROUND
SW704
ST/BY
SW702

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