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JVC Model 200 User Manual

Page 73

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Chapter 2---System Description

Table 2-15. Scan Reversal Board I/O signals

Horizontal / Vertical Deflection Board

INPUTS DESCRIPTION
H_OUT_
FLYBACK

Horizontal output flyback pulse, about 800 VPP

H_LOCK+

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

H_RED+

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

H_GRN+

Output of horizontal green centering (also top of the green horiz
yoke). About + 5 Vdc.

H_BLU+

Output of horiz. blue centering (also top of the 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 volt supply for use by SRB

+5 V

+5 volt supply for use by SRB

-15 V

-15 V supply for use by SRB

OUTPUTS DESCRIPTION
H_LOCK-

Horizontal interlock for yoke connectors. It should be 5 V when
closed or 0 V when open.

V_RED-
V_RED_SENS

Current feedback of red vertical amplifier

V_GRN-
V_GRN_SENS

Current feedback of green vertical amplifier

V_BLU-
V_BLU_SENS

Current feedback of blue vertical amplifier

FRONT/REAR

Front or rear projection status line. Front = low and rear = high

FLOOR/CEIL

Floor or ceiling status line. Floor = low and ceiling = high

H_CUR_FDBK

Horizontal current feed back, a DC signal proportional to horz.
output current

DEFL_OK

Deflection status line high (about 2 V) = good low = no scan

Convergence/Deflection Board

INPUTS DESCRIPTION

X_RED+

Output of horizontal red convergence amplifier

X_GRN+

Output of horizontal green convergence amplifier

Model 200 Service Manual

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