Acer Aspire 1800 Service Manual page 34

Keyboard
Windows logo key
Internal & external keyboard work
simultaneously
Battery
Vendor & model name
Battery Type
Pack capacity
Cell voltage
Number of battery cell
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
NOTE: 1. Li-ion Battery: Connect 1K
NOTE: B/I pin: Battery can be Charged/Discharged only while this pin is connected to GND.
LCD Inverter Specification
No. Panel
1 LG
2 Samsung
3 AU
4 LG
There are two control signals that come form system to control lamp brightness. One signal is
named DAC_BRIG, which limits current to meet LCD lamp current specification. Another one is
named PWM, which adjusts lamp brightness. This inverter brightness is adjusted by PWM burst
mode. The PWM burst mode is to turn on and off the lamp at rate of 150Hz. The effective
brightness is varied with the duty cycle.
26
Item
Item
Package configuration
±
5 % ohm resistor to GND in Battery PCB.
Model Type
LP171W0 17" WXGA
1-A4-K2
LTN170W 17"WXGA
X-L01
B170PW0 17"WXGA
1
LP171W0 17"WXGA
2-A3
Yes
Yes
Specification
Panasonic/Sanyo
Li-ion
60Wh
3.7V/cell/2000mAh High discharge rate
8
BATT+: Battery+, Battery Positive Terminal
ID : Identify Pin (Note 1)
B/I : Battery-In Pin
TS : Connect to Thermister
SMD : SMBus data interface I/O pin
SMC : SMBus clock interface I/O pin
GND : Battery Negative Terminal
Frequency Current
(KHz) (mA)
45/60/70 3.5/6/6.5
55/60/65 4/6/6.5
50/60/70 -/6/7
40/60/80 3/6.5/7
Specification
Work
°
VS at 0 C
Voltage
1500Vrms 750 Vrms
at 6mA
1800Vrms 730 Vrms
at 6mA
1500 Vrms 785 Vrms
at 6mA
1560 Vrms 720 Vrms
at 6.5mA
Brightness
130/160
145/170
160/190
145/170
Chapter 1