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6

3.  Shading

To correct variations in the left and right shading due to
differences in the positions of the projection tubes, to
correct gamma and to blank the final sweep interval.

Horizontal parabola wave is made by horizontal plus via
Q7741-Q7744 and Q7745-7747.  H.SAW wave and

H.PARA wave is input to Pin No. 2 and 5 of IC7704, then
they are mixed in the IC7704 and then it is output from pin
No. 7 o IC7704.
The correction wave-form output from IC7704 is input to
pins 10 and 8 of IC7703, the R and B gain is adjusted, and
then the left and right brightness are varied to correct any
lack of colour uniformity on the screen.

4.  Prevention of projection tube burn-out

This feature operates to prevent burn-out from occurring in
the phosphor substance of the projection tube when the
picture is stopped for an extended period.

Each time the power is turned off, the channel is changed,
or AV input switching is performed, the screen display
position is moved and rotated horizontally and vertically
approximately 3 mm in a clockwise direction.
The MPU sends a command to move the screen display
position horizontally and vertically, to IC9601, through the
I²C Bus, for an input from the button on the TV, or from the
remote control, to turn the power on or off, or change the
channel, or switch the AV input.

A3

W2

7

H.SAW

Q7741

|

Q7744

HP-BLK

H.PARA

Q7745

|

Q7747

ADJ.

2

Q7748

7

5

10

8

19

18

20

R-gain

B-gain

TPW101

TPW117

6

TPW2

+12V

R-out

G-out

B-out

(H.V)

(H+1.V)

(H.V+1)

(H+1.V+1)

7

5.  Single colour mode

During the service mode, each colour (R,G and B) can be
displayed by “HELP” key of remote control.
Command data is sent to IC7707(DAC) from IC1101(MPU)
via IIC bus line.
Then the voltage is output from pin No.1, 2 and 9 of IC7707
as follows.

IC7707 Pin No.

1

2

9

B

H

L

H

G

L

H

H

R

H

H

L

R+G+B

L

L

L

Above voltage are applied to Q7718, Q7717 and Q7715 as
blanking plus though Q7728-30.

69

70

CLK

DATA

16

1

2

B BLK

9

G BLK

R BLK

14

15

+9V

+9V

Q7730

Q7729

Q7728

1

2

B

9

G

R

Q7718

Q7717

Q7715

8

6.  Protection

To prevent smoke, fire and the radiation of X-rays due to

abnormally high voltages by using detection circuits (listed

below) to instantly turn off the power in the event of a

problem. Also, depending on the circuit, the projection

tubes can be damaged in the event of a problem; therefore,

there is also a circuit that informs the blanking circuit when

a problem arises so that the video signals to the cathodes

can be blanked.

There is a circuit that prevents the power being turned on by

remote control once a problem is detected.

EURO5VP chassis has protection management IC which is

IC1103 (SOS) on A board.

Protection line of each circuit is connected to IC1103 pin

No.5-7 and 9-11.

When some of these pins go to “H”, this abnormal

information is informed to IC1101 (MPU) via IIC bus line.

Then pin No.52 of IC1101 voltage to “H”, Q1101 turns ON,

Q6751 base voltage drops to LOW and trips the RL6701.

D1111

69

70

A2/W1

7

ETC.

6

7

9

10

11

5

D1105

D1104

75

Q1109

Q1109

+35V

Q1110

+12V

Q1108

+5V

EHT.

NECK

CONV.

+.- 15V

EHT.

14

15

CLK

DATA

TPF51

D400/Q400

<VERTICAL>

TPF41

D500/Q503

D514/Q511

<EHT DET.>

D7560

<+22V/-22V>

52

Q7115 <R>

Q7117 <G>

Q7118 <B>

CRT STOP

D869

<+130V>

D861

<+15V/-15V>

Q1101

RL6701

P11/D4

4

Q6751

9

7.  Digital convergence

IC7103

JLC1562BF

IC7103

JLC1562BF

IC7103

JLC1562BF

IC7106

SC430409CFC

IC7106

SC430409CFC

IC7106

SC430409CFC

IC7107

TVSA0030

IC7107

TVSA0030

IC7107

TVSA0030

IC7109

M62354FP

IC7109

M62354FP

IC7109

M62354FP

IC7110

TVSA0036

IC7110

TVSA0036

IC7110

TVSA0036

IC7108

IC7108

IC7108

IC7409

IC7409

IC7409

IC7101

IC7101

IC7101

IC7104

IC7104

IC7104

IC7102

IC7102

IC7102

IC7401

LC78815M

IC7402

LC78815M

IC7403

LC78815M

DYNAMIC DAC

ARRAY-1

IC7401

LC78815M

IC7402

LC78815M

IC7403

LC78815M

DYNAMIC DAC

ARRAY-1

IC7401

LC78815M

IC7402

LC78815M

IC7403

LC78815M

DYNAMIC DAC

ARRAY-1

IC7111

LC78815M

IC7112

LC78815M

IC7113

LC78815M

DYNAMIC DAC

ARRAY-0

IC7111

LC78815M

IC7112

LC78815M

IC7113

LC78815M

DYNAMIC DAC

ARRAY-0

IC7111

LC78815M

IC7112

LC78815M

IC7113

LC78815M

DYNAMIC DAC

ARRAY-0

CONVER
-GENCE
AMP

CONVER
-GENCE
AMP

CONVER
-GENCE
AMP

R-V
R-H

R-V
R-H

R-V
R-H

G-V
G-H

G-V
G-H

G-V
G-H

B-V
B-H

B-V
B-H

B-V
B-H

IC7404

IC7404

IC7404

IC7116

UPC4570G2

IC7117

UPC4570G2

IC7118

UPC4570G2

ACTIVE

LPF

IC7116

UPC4570G2

IC7117

UPC4570G2

IC7118

UPC4570G2

ACTIVE

LPF

IC7116

UPC4570G2

IC7117

UPC4570G2

IC7118

UPC4570G2

R-V0

R-V0

R-V0

G-V0

G-V0

G-V0

B-V0

B-V0

B-V0

R-H0

R-H0

R-H0

G-H0

G-H0

G-H0

G-H0

G-H0

G-H0

R-V1

R-V1

R-V1

R-V

R-V

R-V

R-H1

R-H1

R-H1

G-V1

G-V1

G-V1

G-H1

G-H1

G-H1

B-V1

B-V1

B-V1

B-H1

B-H1

B-H1

G-V

G-V

G-V

B-V

B-V

B-V

R-H

R-H

R-H

G-H

G-H

G-H

B-H

B-H

B-H

OSD
RGBYs In

OSD
RGBYs In

OSD
RGBYs In

OSD
RGBYs Out

OSD
RGBYs Out

OSD
RGBYs Out

IIC Bus

IIC Bus

Remote
Control In

Remote
Control Out

VP

HP

CLK

CLK

HPOUT

NRHP