Video Amplifier Pcbs; Video Amplifier Pcb - Hughes JVC 100 Service Manual

Chapter 4---Maintenance (Removal/Replacement)
3. Remove the three G2 Output cables from connectors CN202 (to the blue
Video Amplifier), CN203 (to the red Video Amplifier), and CN204 (to the
green Video Amplifier).
4. Remove the P10REG cables from connector CN205 and connector
CN206.
5. Remove the white standoff retainer from in front of the PCB.
6. Slide the Regulator PCB out.
7. Replace the PCB in the reverse.
Control Input
and Outputs
(CN
G Supply
2
(from HVPS,
CN201)

4.16 Video Amplifier PCB

On the Model 100, there are three Video Amplifier PCBs, one for each of the 3
CRTs. Each VA PCB is located directly under its respective CRT.
To remove a Video Amplifier PCB:
1. To remove any of the Video Amplifier PCBs it will make the job easier to
remove all the covers from the projector (Section 4.2). To remove the
Video Amplifier for the green CRT, remove the Regulator PCB first
(Section 4.15).
2. Disconnect the Video Input cable from connector CN101.
3. Disconnect the G2 Output connector fron connector CN107.
4. Disconnect the ground connector from connector CN109.
5. Disconnect the G1 Cathode and Filament cable from connector CN108.
6. Disconnect the Power/Control cable from connector CN102 (and
connector CN103 if it is daisy chained).
7. Disconnect the cable from connector CN106.
4-14
Figure 4-13 Regulator PCB.
Model 100 Service Manual
RGB G2 Output
to Video
Amplifier PCBs
(CN202-blu,
CN203-red,
CN204-grn)