JVC 250 service manual Raster Timing Generator PCB - Remove and Replace

Chapter 5---Electronics

Vertical Deflection PCB to break the range of horizontal scan frequencies into four smaller ranges called bands (see Figure 5-12).

Figure 5-12LEDs on the Raster Timing Generator PCB.

Raster Timing Generator PCB - Remove and Replace

Tools Needed

#1 Pozi-drive Phillips-head screwdriver

Parts Needed

Raster Timing Generator PCB - p/n 105238

To remove the Raster Timing Generator PCB:

1.Power OFF the projector by IR Remote or PC, and allow the cooling fans to run until they shut off automatically.

2.Turn the AC Circuit Breaker to the OFF position and unplug the AC Power Cord.

3.Disconnect all the external source video cables and control cables.

4.Remove the rear cover.

5.Remove the Back Panel. Remove the nine Pozi-drive Phillips-head retaining screws using the #1 Pozi-drive Phillips screwdriver.

6.Pull the black Card Extractor handles back to disconnect the Raster Timing Generator PCB connector and pull the PCB out of the Electronics Module.

7.Reverse the procedure to install the Raster Timing Generator PCB.

5-20 Model 250 Service Manual