CCTV board cameras denoted "1043" contain B/W Sony HAD CCD sensor with 752x582 resolution, CXD2463R CCD timing control chip and CXA1310AQ CCD signal processing chip. The board modification described here allows the control of the CCD vertical register pulses by the external circuit with a possibility of long exposures.
The design principle is based on Jon Grove's 1004X camera modification. Read a detailed description on his pages. The "1043" camera PCB layout is slightly different from "1004" and my control algorithm implemented in MCU uses more signals from the camera. So here is a brief description of particular steps of the "1043" camera board adaptation.
The +15V voltage is generated on the camera board and it is used as the CCD power supply and CXD2463R vertical driver positive ( VH ) supply. We need to control these power inputs separately so we have to isolate them on the board and connect wires to them.
The power track is routed on the bottom side of the PCB to the CCD pin 9 and then on the top side to CXD2463R pin 5. It is easy to cut the track between the source and CCD pin 9. Wires can be soldered to the decoupling capacitor and to the CCD pin.
The track between the CCD pin 9 and CXD2463R pin 5 must be cutted on the top side of the PCB because it is routed to the bottom side under the CXD2463R package. Most of the track is hidden under the CCD but there is a short visible section. Check with a multimeter if it is really connected to the CCD pin 9 before you cut it because there are some simmilar tracks around.
It is a bit tricky to solder the wire to the CXD2463R pin 5 because it is easy to short the pin with the surrounding ones. I used a single 0.1mm wire. After soldering it to the pin I cutted it to approx. 10mm length and soldered a flexible multicore wire to it. Then I attached the junction to the top of the CXD2463R package with epoxy.
Pins 20 and 21 of CXD2463R are pulled down by on-chip resistors and we need to connect a wire for +5V signal to them. There are no solder pads like on the "1004" board so we must solder a wire directly to the pins. At my board both pins were already soldered together so it was quite easy to add a thin wire. I used the same method as with the pin 5 : thin wire, multicore wire and epoxy.
This signal runs from CXD2463R pin 4 to CCD pin 2. The wire can be easily soldered to the CCD pin at the bottom side of the PCB.
SYNC and BLK signals from CXD2463R pins 25 and 26 go to CXA1310AQ pins 4 and 29. Near CXA1310AQ chip both signals are connected to pull-up resistors and it is easy to solder wires there.
If you want to control the gain of CXA1310AQ amplifier you have to disconnect ( lift ) the CXA1310AQ pin 16 from the board and solder a wire to it. If you want to switch between manual and automatic gain control you have to solder another wire to CXA1310AQ pin 17.
Now if you have tracks cutted and wires soldered then connect together wires from +15V power supply, CXD2463R pin 5 and CCD pin 9, then connect together wires from CXA1310AQ pins 16 and 17, leave the other wires floating ( don't short them to anything ! ) and switch the camera on. It should work without any changes in "normal" autoexposure mode.
If it still works you will need a daughterboard with the control circuit to be able to experiment with long exposures.
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