JVC Model 200 service manual Input No. Information Description, ILAFREQN1, ILAFREQN2, ILAFREQN3

Chapter 2---System Description

J32
	1	GND
FROM		IIC_CLK
	2
		IIC_DATA
SCB	3
		/IIC_SINT
	4

	J31
	1		GND
	2	X_RED_CONV
FROM 4
		X_GRN_CONV
SCB	6	X_BLU_CONV
	8	Y_RED_CONV
	10
		Y_GRN_CONV
	12	Y_BLU_CONV
	18	CORR_SYNC
	16			GND
FROM RTG 17		V_DRIVE

J33

FROM HVDB 5 WIDTH_CONTROL

J32
	5	+5.1V
	6
FROM		6ND
	7
		+15V
LVPS
	9	GND
	11	-15V
	13	GND

CONVERGENCE/ DEFLECTION BOARD

RED_ILA+

RED_ILA-

GRN_ILA+

GRN_ILA-

BLU_ILA+

BLU_ILA-

X_RED+

X_RED-

X_GRN+

X_GRN-

X_BLU+

X_BLU-

Y_RED+

Y_RED-

Y_GRN+

Y_GRN-

Y_BLU+

Y_BLU-

GND H_PARABOLA

V_PARABOLA

V_RAMP

V_PARAB

GND

J38

1

2TO

4ILAs

5

7

8

J39

1

2

TO/FROM 34 SRB

5

6

J40

1

2

3TO/FROM

4SRB

5

6

J31

13TO

14HVPS

15

J33

1FROM

32HVDB

Figure 2-15.Convergence/Deflection Board I/O diagram.

IIC interface

Adjustments for this board are performed by the System Controller via the IIC serial bus interface. This three wire bus interface consists of a clock line, a data line and an interrupt line. The C/D Board does not create any IIC interrupt. The following table lists all adjustments performed via the IIC bus interface (I = Input to C/D Board, O = Output from C/D Board):

Table 2-12.		Convergence/Deflection IIC communication
Input/	No. of		Information	Description
Output	bits
I	1		ILA_FREQ_N1	Data for selection of frequency of ILA bias circuit
I	1		ILA_FREQ_N2	Data for selection of frequency of ILA bias circuit
I	1		ILA_FREQ_N3	Data for selection of frequency of ILA bias circuit

2-52 Model 200 Service Manual