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9600 Service Manual - gmecorp-usa.com

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Video Path 12<br />

HARD COPY CAMERA<br />

Video to the internal Hard Copy Camera <strong>com</strong>es from two different sources. The source<br />

depends on whether fluoro x-rays are on or off.<br />

X-Ray Off Condition - In the X-Ray off condition the video signal is supplied by the<br />

Image Processor PCB via D/A converter U2. The video leaves the Image Processor<br />

PCB at P4 pin 9 and is sent to J11 pin 9 on the Video Switching PCB. The video signal<br />

runs through a DC Restoration Clamp (U17) to restore the video sync tips to ground.<br />

The video can be monitored at TP20 (LDAC) on the Video Switching PCB. The video<br />

signal is sent to the video switching matrix where it is routed to mux chip U8 IN2 (pin 9).<br />

The video signal leaves U8 at VOUT (pin 20). See the Video Control Section for more<br />

information on video routing. The video signal from U8 is buffered by amplifier U1 and is<br />

sent to connector J3 pin 9. The video signal can be monitored at TP5 (HCO). The video<br />

signal exits the front of the electronics box at J6 (BNC connector) near the top on the<br />

right side. The video signal runs from J6 on the electronics box to the VIDEO IN BNC<br />

connector located on the front of the Hard Copy Camera. See the Peripherals Section<br />

for more information.<br />

X-Ray On Condition - In the X-Ray on condition the video signal is supplied by the<br />

CCD Camera via the Video Switching PCB (See Figures 5 and 6). The video signal<br />

enters the Video Switching PCB at J6 and is buffered by U4 and runs through a DC<br />

Restoration Clamp (U7) to restore the video sync tips to ground. The video can be<br />

monitored at TP10. The video signal is sent to the video switching matrix where it is<br />

routed to mux chip U8 IN0 (pin 5). The video signal leaves U8 at VOUT (pin 20). See the<br />

Video Control Section for more information on video routing. The video signal from U8<br />

is buffered by amplifier U1 and is sent to connector J3 pin 9. The video signal can be<br />

monitored at TP5 (HCO). The video signal exits the front of the electronics box at J6<br />

(BNC connector) near the top on the right side. The video signal runs from J6 on the<br />

electronics box to the VIDEO IN BNC connector located on the front of the Hard Copy<br />

Camera. See the Peripherals Section for more information.

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