56FW-53H (serv.man2). IC voltage tables for the DA100 (50Hz) and DA50W chassis - Sharp TV Service Manual (repair manual). Page 6

DA100 (50Hz) and DA50W Chassis – Voltage Tables

Sharp Electronics (UK) Limited - March 2003

This IC is the same type for all FW models.  To date, it has no alternative.

1

-Ve

I

Negative supply

-18.0V

2

-Ve

I

Negative supply

-18.0V

3

-Ve

I

Negative supply

-18.0V

4

Output

O

PWM output

0V

5

Boot Diode

I

Boost diode

-7.0V

6

Boot

I

Boost

10.0V

7

NC

X

Not  connected

0V

8

Feedback C

I

Feedback

0V

9

Frequency C

I

Freq control

-15.0V

10

Ground

X

Signal ground

0V

11

Input

I

Signal input

0V

12

Mute

I

<2.7V mute

5.1V

13

NC

X

Not connected

0.5V

14

+Ve

I

Positive supply

17.2V

15

V reg

I

Reference

-7.0V

16

+Ve

I

Positive supply

17.2V

17

-Ve

I

Negative supply

-18.0V

18

-Ve

I

Negative supply

-18.0V

19

-Ve

I

Negative supply

-18.0V

20

-Ve

I

Negative supply

-18.0V

This IC is the same type for all FW models.  To date, it has no alternative.
Note that the earth connection of the meter has to be taken at the negative end of the main smoothing
block.  A more convenient connection is the chopper transistor heatsink.

1

VDD

I

Supply

5.2V

2

OSCIN

I

Oscillator

2.5V

3

OSCOUT

O

Oscillator

2.5V

4

NMI

I

Remote input

5.0V

5

TEST

X

Grounded

0V

6

RESET

I

From reset

5.2V

7

PB7

I

From processor

5.2V

8

PB6

I

100Hz reference

0.48V

9

PB5

I/O

Key  scan

5.2V

10

PB3

I/O

Key scan

0V

11

PB1

I/O

Key scan

0V

12

PB0

I/O

Key scan

0V

13

PA3

O

To processor

5.2V

14

PA2

O

Degauss

0V

15

PA1

O

Power control

0V

16

VSS

X

Ground

0V