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Chapter 2—Functional Descriptions
2-52 Model 330. 340SC, and 370SC Service Manual
BVIDCH1
Blue video input to channel 1.
BVIDCH2
Blue video input signal to channel 2.
HSYNCCH1
Horizontal or composite sync signal to channel 1.
HSYNCCH2
Horizontal or composite sync signal to channel 2.
VSYNCCH1
Vertical sync signal to channel 1.
VSYNCCH2
Vertical sync signal to channel 2.
COMPVID
Composite video signal, pass through to decoder.
LUM
Luminance signal for SVHS, pass through to decoder.
CHROM
Chrominance signal for SVHS, pass through to decoder.
RTN
Return for SVHS; pass through to decoder.
Image Light Amplifiers
Outputs
Description
+RLCLV
One half (½) of the differential pair providing a distorted square
wave to the red ILA. (TP 21)
-RLCLV
One half (½) of the differential pair providing a distorted square
wave to the red ILA. (TP 20)
+GLCLV
Similar to +RLCLV. (TP 19)
-GLCLV
Similar to -RLCLV. (TP 18)
+BLCLV
Similar to +RLCLV. (TP 17)
-BLCLV
Similar to -RLCLV. (TP 16)
Decoder
Inputs
Description
RED
Red video signal from decoder.
GREEN
Green video signal from decoder.
BLUE
Blue video signal from decoder.
SYNC
Horizontal sync signal from decoder.
IICINT
Interrupt signal from decoder, pass through to SCB.
CH3SEL
Indicates to VPB that video input is composite.
CH4SEL
Indicates to VPB that video input is SVHS.
VERT
Vertical sync signal from decoder.
Outputs
Description
SCLK
Single ended serial clock from serial communication bus to decoder.
SDATA
Single ended serial data from serial communication bus to decoder.
IICCLK
IIC clock pass through to decoder.
IICDATA
IIC data pass through to decoder.
COMPVID
Composite video signal, pass through to decoder.
LUM
Luminance signal for SVHS, pass through to decoder.
CHROM
Chrominance signal for SVHS, pass through to decoder.
RTN
Return for SVHS; pass through to decoder.