JVC Model 200 service manual System Controller Board, Block Diagram

Chapter 2---System Description

P11

TO PROJ B23 LENS B24

B28 FROM B29 LVPS B27

FROMHVPS B26

FROM B31 ALPS B30B32

B9

FROM B10 RTG

B2

B1

B3

P10

B31

B30

A32

A31

A30

A B 20 -20

FROM 21 -21 LVPS 22 -22 23 -23

24 -24

25 -25

26 -26

27 -27

28 -28

29 -29

Lens Zoom Lens Focus

/LV_ENA /FAN_ENA /LV_OK

/HV_OK

/LAMP_OK /LAMP_LIT

/LAMP_ENA

ODD_FIELD SRC_VALID H_DRIVE_SC V_DRIVE

H_F2V

IIC_DATA

IIC_CLK

IIC_CLK1

IIC_CLK2

IIC_CLK3

+5 .1V stby +5 .1V

+15V

-15V

G N D

SYSTEM CONTROLLER BOARD

RED_OVER

GRN_OVER

BLU_OVER

Y_RED_CONV

Y_GRN_CONV

Y_BLU_CONV

X_RED_CONV

X_GRN_CONV

X_BLU_CONV

BLU_THRES

GRN_THRES

RED_THRES

BLU_SENS

GRN_SENS

RED_SENS

P10

B18

B17 TOVPB

B16

B4

B5 TO

B6 CDB

B1

B2

B3

B8

B9

B10B11 TOVPB

B12

B13

Figure 2-12. System Controller Board, Block Diagram.

IIC Interface

Communications are performed through the IIC bus to the other PCBs in the system.This three wire bus interface consists of clock line, data line and interrupt line. Data transferred over the IIC bus is listed in Table 2-9 (I/O signals).

System Controller Board Input/Output

This section provides a description of the inputs to and outputs from the SCB. The I/O descriptions are arranged by the source/destination of the signal. The format used is such that the assembly communicated with is used as the primary heading of each output. Input refers to an input to the SCB, output refers to an output from the SCB.

Table 2-9.System Controller Board I/O signals

Video Processor Board

I/O

DESCRIPTION

IIC_CLK

IIC clock line. Clock line for control of synchronous data transfer over the IIC bus interface.

Model 200 Service Manual 2-35