Hughes JVC Projector 230 Service Manual
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Chapter 2---System Description Model 230 Service Manual2-49 • ILA® assembly driver circuitry with temperature compensation • Phase locked loop for ILA ® assembly drivers • IIC serial bus interface The Convergence/Deflection Input/Output diagram (Figure 2-15) and the list of inputs and outputs (Tables 2-16 and 2-17) provide information for the technician to perform module level troubleshooting. IIC_CLK IIC_DATA /IIC_SINT X_RED_CONV X_GRN_CONV X_BLU_CONV Y_RED_CONV Y_GRN_CONV Y_BLU_CONV V_DRIVE...
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Chapter 2---System Description 2-50Model 230 Service Manual Table 2-16. Convergence/Deflection IIC communication INPUT/ OUTPUTNO. OF BITSINFORMATION DESCRIPTION I 1 ILA_FREQ_N1 Data for selection of frequency of ILA bias circuit I 1 ILA_FREQ_N2 Data for selection of frequency of ILA bias circuit I 1 ILA_FREQ_N3 Data for selection of frequency of ILA bias circuit I 1 ILA_FREQ_N4 Data for selection of frequency of ILA bias circuit I 1 ILA_FREQ_N5 Data for selection of frequency of ILA bias circuit I 1...
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Chapter 2---System Description Model 230 Service Manual2-51 I 8 H_RED_ EDGE_LINData for red horizontal edge linearity correction I8H_GRN _EDGE_LINData for green horizontal edge linearity correction I8H_BLU _EDGE_LINData for blue horizontal edge linearity correction I 8 TP_RED_SKEW Data for adjustment of red top/bottom skew I 8 TP_GRN_SKEW Data for adjustment of green top/bottom skew I 8 TP_BLU_SKEW Data for adjustment of blue top/bottom skew I 8 TP_BOW Data for adjustment of top/bottom bow I 8 TP_PIN...
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Chapter 2---System Description 2-52Model 230 Service Manual IIC_DATA IIC data line. Bidirectional serial line for synchronous data transfer between the System Controller Board and the C/D Board. X_RED_ CONVRed X convergence waveform. The amplitude for full scale correction is about 1 VPP. X_GRN_ CONVGreen X convergence waveform. The amplitude for full scale correction is about 1 VPP. X_BLU_ CONVBlue X convergence waveform. The amplitude for full scale correction is about 1 VPP. Y_RED_ CONVRed Y...
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Chapter 2---System Description Model 230 Service Manual2-53 X_BLU- Current feedback of blue horizontal (X) convergence amplifier Y_RED- Current feedback of red vertical (Y) convergence amplifier Y_GRN- Current feedback of green vertical (Y) convergence amplifier Y_BLU- Current feedback of blue vertical (Y) convergence amplifier OUTPUTS DESCRIPTION X_RED+ Output of red horizontal (X) convergence amplifier X_GRN+ Output of green horizontal (X) convergence amplifier X_BLU+ Output of blue horizontal (X)...
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Chapter 2---System Description 2-54Model 230 Service Manual +5.1 V + 5 V supply for use by convergence board. +15 V + 15 V supply for use by convergence board. -15 V - 15 V supply for use by convergence board. Interlocks and protection None 2.3.10 Scan Reversal Board The Scan Reversal Board (SRB) is mounted vertically on the right side of the card cage. The following functions are provided by the SRB: • Reversal of scan in both horizontal and vertical axes • Horizontal width adjustment for each color...
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Chapter 2---System Description Model 230 Service Manual2-55 Figure 2-16. Scan Reversal Board, Input/Output Diagram. Scan Reversal Board I /O This section describes the inputs to and outputs from the SRB. The I/O descriptions are arranged by the source/destination of the signal. The assembly communicated with is the primary heading of each group of signals. Those signals are subdivided into inputs and outputs. Input refers to an Input to the Scan Reversal Board. Output refers to an output from the Scan...
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Chapter 2---System Description 2-56Model 230 Service Manual Table 2-19. Scan Reversal Board I/O signals HORIZONTAL / VERTICAL DEFLECTION BOARD INPUTS DESCRIPTION H_OUT_ FLYBACKHorizontal 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 +...
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Chapter 2---System Description Model 230 Service Manual2-57 CONVERGENCE/DEFLECTION BOARD INPUTS DESCRIPTION X_RED+ Output of horizontal red convergence amplifier X_GRN+ Output of horizontal green convergence amplifier X_BLU+ Output of horizontal blue convergence amplifier Y_RED+ Output of vertical red convergence amplifier Y_GRN+ Output of vertical green convergence amplifier Y_BLU+ Output of vertical blue convergence amplifier OUTPUTS DESCRIPTION X_RED- Current feedback of horizontal red convergence...
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Chapter 2---System Description 2-58Model 230 Service Manual GREEN YOKE CONNECTOR NAME DESCRIPTION H_GRN_YOK+ Top of green horizontal yoke H_GRN_YOK- Bottom of green horizontal yoke GRN_LOCK+ Interlock for green yoke. 5 V when closed or 15 V when open. GRN_LOCK- Interlock for green yoke . 5 V when closed or 0 V when open. V_GRN_YOK+ Top of green vertical yoke V_GRN_YOK- Bottom of green vertical yoke X_GRN_YOK+ Top of green horizontal convergence yoke X_GRN_YOK- Bottom of green horizontal convergence...