32
Chapter 1
*2. Inverter operating frequency should be within specification (51-59kHz) at max. and min.
brightness load.
*3. INV_PWM enable implies INV_PWM signal is High level (On duty cycle is 100%). It it a square
wave of 150Hz to adjust backlight brightness that is a function of PWM duty cycle. Backlight
brightness is maximum value under INV_PWM at 100% and brightness is minimum under
INV_PWM at 40%.
*4.The system interface signals belong to 3.3V.
*5. Please make sure open lamp output voltage should be within starting voltage specification.
*6. Inverter should pass human body safety test.
*7. Inverter should no smoking by any component open/short test.
*8. Transformer voltage stress should not be over 85% under any condition.
(turn on overshoot transient and line transient.)
*9. Audio noise should be less than 36dB at 10cm distance.
.
Thermal
All components on inverter board should follow below rules:
1. Component using conditions (component stress) must be within component specification
including voltage rating, current rating, temperature etc.
2. Component temperature shold follow below:
!
∆
T <=30 degree C, at 25, 35 degree C.
!
Component temperature should be less than 70 degree C inside system at 35 degree C.
Electrical specification
No
.
Symbol
Min.
Typ.
Max.
Unit
Comment
1
V oper*
--
680
--
V
Il
6.0
6.3
6.6
A
Il
2.7
3.0
3.3
mArms
Enable= H,
PWM Duty = 100%
V
100
mArms
Enable = H,
PWM Duty = 30%
Voltage form Falling
and Rising time
300
Vrms
At IL = 5.5 mArms
f
50
55
60
kHz
*2
η
80%
85%
--
--
LCD
Item
Specification
Vendor & model
name
AU UB
141X03
Samsung
LTN141XF-
L05
Hannstar
HSD150PXII-
B
Hannstar
HSD150PKII-
B
IBM ITUX97C
Mechanical Specifications
LCD display area
(diagonal, inch)
14.1
14.1
15.0
15.0
15.0
Display technology
TFT
TFT
TFT
TFT
TFT
Resolution
XGA
(1024x768)
XGA
(1024x768)
XGA
(1024x768)
SXGA+
(1400x1050)
UXGA
(1600X1200)
Summary of Contents for Aspire 1400
Page 6: ...VIII ...
Page 11: ...Chapter 1 5 System Block Diagram ...
Page 13: ...Chapter 1 7 Bottom View ...
Page 57: ...Chapter 2 51 7 Direct Button Test Run the BUTTON exe to test Audio DJ controls ...
Page 74: ...68 Chapter 3 ...
Page 89: ...Chapter 5 83 Top View Jumper and Connector Locations Chapter 5 ...
Page 91: ...Chapter 5 85 Bottom View ...
Page 94: ...88 Chapter 6 Exploded Diagram THE SYSTEM ...
Page 95: ...Chapter 6 89 LOGIC UPPER ASSY Aspire 1400 Series ...
Page 96: ...90 Chapter 6 LCD 14 1 Model Name Aspire 1400 Series ...
Page 97: ...Chapter 6 91 LCD 15 Aspire 1400 Series ...
Page 99: ...Chapter 6 93 FDD ASSY HDD W O HDD ASSY 02 02 ...
Page 109: ...Chapter 6 103 ...
Page 112: ...Appendix A 106 ...
Page 116: ...110 Appendix C ...