JVC 250 ユーザーズマニュアル

Chapter 5---Electronics

5-16

Model 250 Service Manual

Pull the black card extractor handles back to disconnect the Video
Processor PCB connector and pull the PCB out of the Electronics Module.

Reverse the procedure to install the Video Processor PCB.

5.5 Raster Timing Generator PCB

Raster Timing Generator PCB - Main Functions

Generates an internal sync pulse

Detects and selects sync pulses

Generates a phase locked sync

Generates blanking pulse

Provides horizontal and vertical phase adjustments

Detects interlaced and generates odd field pulse

Selects horizontal frequency band

Generates horizontal line count and vertical count

Provides IIC interface

Generates clamp pulse

Detects changes in source

Generates HVPS_SYNC signal

Enables horizontal deflection (/H_ENA) circuitry

Figure 5-10

Raster Timing Generator I/O diagram for Power Supplies.