Pioneer PDP-R04E, Service Manual

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PDP-R04E
171
5 6 7 8
5 6
7
8
C
D
F
A
B
E
TA1287FG (AV BOARD ASSY : IC8906)
• RGB to YUV/IQ High-speed Matrix IC
Block Diagram
CLAMP MATRIX SW
B-Y/Q-MIX
VIN 1
CLAMP YIN 2
Y-MIX
R-Y/I-MIX
TV/Ext.
MIX Ys
CLAMP
CLAMP
CLAMP
CLAMP
UIN 3
CPIN 4
GND 5
RGB
Y/I
Y
U/Q
YUV/IQ
RIN 6
GIN 7
BIN
Matrix Control
UOUT
YOUT
VOUT
VCC
YS3
YS2
YS1 8
16
15
14
13
12
11
10
9
No. Pin Name I/O
Pin Function
1 VIN I Input R-Y (V) or R signal through a clamping capacitor.
2 YIN I Input Y or G signal through a clamping capacitor.
3 UIN I Input B-Y (U) or B signal through a clamping capacitor.
4 CPIN I Input clamping pulse. Threshold: 0.75V
5 GND
−
Ground
6 RIN I Input R or R-Y (V) signal through a clamping capacitor.
7 GIN
I
Input G or Y signal through a clamping capacitor.
8 BIN I Input B or B-Y (U) signal through a clamping capacitor.
9 YS1 I Select to switch mixing ratio. Threshold: 0.75V
10 YS2 I Select to switch mixing ratio. Threshold: 0.75V
11 YS3 I Select to switch mixing ratio. Threshold: 0.75V
12 VCC
−
Power supply 9V
13 VOUT O Output R-Y (V) or R signal.
14 YOUT O Output Y or G signal.
15 UOUT O Output B-Y (U) or B signal.
16 Matrix Control I This pin's voltage control the matrix coefficient for output signals. Selects the output mode.
Pin Function