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Circuit Description
Pin41: Switch for S- VHS (in)
H: S- VHS mode (Y/C separated
mode)
Pin42: Skew output
H: Skew ON
Pin43: A2 stereo data input 1
Pin44: A2 stereo data input 2
Stereo
Bil.
Mono
Forced Mono
Pin43
H
L
L
H
Pin44
L
H
L
H
Pin45:
Sound
mute (out)
Pin46:
Line mute (out)
H: Mute ON
Pin47:
Option
switch scan output 3
Pin48:
Option
switch scan output 2
Pin49:
Option
switch scan output 1
Pin50:
Key scan output 3
Pin51:
Key scan output 2
Pin52:
Key scan output 1
Pin53:
Key scan input 4
Pin54:
Key scan input 3
Pin55:
Key scan input 2
Pin56:
Key scan input 1
Pin57:
OSD
(On Screen
Display)
banking
output
Pin58:
Not used
Pin59:
OSD
blue output
Pin60: OSD green output
Pin61: OSD red output
Pin62: Vertical synchronisation
pulse input for OSD
Pin63: Horizontal synchronisation
pulse input for OSD
Pin64: Power supply (+5V)
3. DAC (IC809) Pin Description
—
Pinl: Power supply (+5V)
Pin2: Data input from CPU (Pin26)
Pin3: Clock input from CPU (Pin25)
Pin4: Load input from CPU (Pin23)
Pin5: Surround ON/OFF output
H: Surround ON
Pin6: Not used
Pin7: SIF System(M)
output
Pin8: Ground
Pin9: SIF System (1) output
Pinl O: SIF System (B/G, D/K) output
AUTO
BIG
D/K
I
NTSC4.43
Pin 7
L
H
L
H
H
Pin 9
L
L
H
L
L
Pinl O
L
L
I-i
H
H
Pinl 1: Volume output
Pin12: Surround level output
Pinl 3: Balance output
Pinl 4: Treble output
Pinl 5: Bass output
Pinl 6: Power supply (+5V)
.4
–3–
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