Service manual

21HT-15C
21HT-16C
15
LED FLASHING CODE
PURPOSE: The led indicates the power mode, occurred I
2
C error and On timer
INPUT: Current power mode
- I
2
C Errors
- On timer
Processing: - If in STANDBY mode and On timer inactive then switch LED off.
- If in STANDBY 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 standby, the led starts blinking).
PRINTED WIRING BOARDS
F 7341N0 PWB. Components side.
0
1
2
3
4
5
6
Y
X
101
2
3
4
56 78
9
IC/Module Name Slave Address Bus Error LED Remarks Ref. No.
Blinking Time
M24C04, M24C08 A0,A2 2 512x8 EEPROM,1024x8 EEPROM IC1002
TDA935x/6x/8x 8A 3 Address of internal TV processor IC801
VTST6HD64 or C0 6 PLL Tuner TU201
CTF551 C0 6
Table Error LED blinking times