Power Sequence - Akai lct42z6tm Service Manual

3-6. Power Sequence

3-6-1. LCD Driving circuit
Power Supply For LCD
V
LCD
Interface Signal (Tx)
Option Signal
(DCR_Enable)
Power for Lamp
Table 11. POWER SEQUENCE
Parameter
T1
T2
T3
T4
T5
T6
T7
T8
T9
Note : 1. Please avoid floating state of interface signal at invalid period.
2. When the interface signal is invalid, be sure to pull down the power supply V
3. The case when the T2/T5 exceed maximum specification, it operates protection
pattern(Black pattern) till valid signal inputted. There is no reliability problem.
4. The T3/T4 is recommended value, the case when failed to meet a minimum specification,
abnormal display would be shown. There is no reliability problem.
Ver. 1.0
Product Specification
90%
10%
0V
T T
1 2
T
3
T
8
Min
0.5
0.5
200
200
0.5
-
2.0
0 < T8 < T2
0 < T9 < T5
July. 22, 2005
T T
5
Valid Data
T
4
T
9
Lamp ON
Value
Typ Max
- 20
- 50
-
-
- 50
- 100
-
LC420WU1
Liquid Crystal Display
90%
10%
T
6 7
Unit
ms
ms
- ms
- ms
ms
ms
- s
ms
ms
to 0V.
LCD
15 / 30