15JF-25H (serv.man14) - Sharp TV Service Manual (repair manual). Page 15

      PURPOSE:                         The led indicates the power mode,ocurred I

2

C error and On timer

INPUT:

- Current power mode
- I

2

C Errors

- On timer

Processing:

- If in STAND-BY mode and On timer in-active then switch LED off.
- If in STAND-BY and On timer active
     set LED to blinking, (switch on and off at 1 Hz with a 50 % duty cycle).
- If in POWER-ON mode, switch LED on.
- If an I

2

C error occurred, let the LED blink at 1 Hz, 50 % duty cycle.

  For the blinking times see the Table below.

Note:

Only when an I

2

C error occurs for a number of times, or for a number of seconds,

the I

2

C error is handled by the system (that is ,only then the set will go to stand-by,

the led starts blinking).

Table Error LED blinking times

0

1

2

3

4

5

6

Y

X

10

1

2

3

4

5

6

7

8

9

7

M24C04 or M24C08

A0,A2

2

512x8 EEPROM or 1024x8 EEPROM IC1002

TDA935x/6x/8x

8A

3

Address of internal TV processor

IC801

VTST6HD64 or

C0

6

PLL Tuner

TU201

CTF551

C0

6