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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 2-49