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JVC Model 200 User Manual

Page 63

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Chapter 2---System Description

H_LOCK+

Horizontal interlock for yoke connectors. This should be about 5 V
when closed or 15 V when open.

H_RED+

Output of horiz. red centering (also top of the red horiz. yoke). About
+ 5 VDC.

H_GRN+

Output of horz. green centering (top of green horz. yoke). About + 5
VDC

H_BLU+

Output of horiz. blue centering (top of blue horiz. yoke). About + 5
VDC.

V_RED+

Output of red vertical amplifier. About 40 VPP.

V_GRN+

Output of green vertical amplifier. About 40 VPP.

V_BLU+

Output of blue vertical amplifier. About 40 VPP.

+15 V

+15 V supply for use by Scan Reversal Board

-15 V

-15 V supply for use by Scan Reversal Board

+5 V

+5 V supply for use by Scan Reversal Board

Convergence/Deflection Board

INPUTS DESCRIPTION

V_RAMP

Vertical ramp waveform. About 4 VPP.

V_PARAB

Vertical parabola waveform. About 4 VPP.

OUTPUTS DESCRIPTION

WIDTH_CTRL

A DC waveform for controlling width of picture. About 4 V max.

Raster Timing Generator (RTG board)

INPUTS DESCRIPTION
/H_ENABLE

A low on this line enables horizontal deflection. A high disables the
horizontal amplifier.

H_BAND:0
H_BAND:1
H_BAND:2

Horizontal frequency band line. 000 = band A, 001 = band B, 011 =
band C and 111 = band D.

HF_2V

Horizontal frequency to voltage converter. a DC signal proportional
to horiz. frequency. About 4.2 V at 90 kHz.

H_DRIVE

Horiz. drive pulse, 50 % duty cycle HCT level signal

System Power Supply

INPUTS DESCRIPTION

+5 V

+ 5 V supply for use by HVD and Scan Reversal Boards

+15 V

+ 15 V supply for use by HVD and Scan Reversal Boards

-15 V

- 15 V supply for use by HVD and Scan Reversal Board

Model 200 Service Manual

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