Lenovo 3000 N500 User Manual

Power system checkout
To verify a symptom, do the following:
1. Turn off the computer.
2. Remove the battery pack.
3. Connect the ac adapter.
4. Check that power is supplied when you turn on the computer.
5. Turn off the computer.
6. Disconnect the ac adapter and install the charged battery pack.
7. Check that the battery pack supplies power when you turn on the computer.
If
you suspect a power problem, see the appropriate one of the following power
supply checkouts:
v “Checking the AC adapter”
v “Checking operational charging”
v “Checking the battery pack” on page 30
Checking the AC adapter
You are here because the computer fails only when the AC adapter is used.
v If the power-on indicator does not turn on, check the power cord of the AC
adapter for correct continuity and installation.
v If the computer does not charge during operation, go to “Checking operational
charging”
To
check the AC adapter, do the following:
1. Unplug the AC adapter cable from the computer.
2. Measure the output voltage at the plug of the AC adapter cable. See the
following figure:
2
1
(20V)
3
Pin Voltage (V dc)
1 +19
2 0
3 Ground
Note: Output voltage of pin no.2 of the AC adapter may different from the one
you are servicing.
3. If the voltage is not correct, replace the AC adapter.
4. If the voltage is acceptable, do the following:
v Replace the system board.
v If the problem persists, go to “Lenovo 3000 N500” on page 43.
Note:
Noise from the AC adapter does not always indicate a defect.
Checking operational charging
To check whether the battery charges properly during operation, use a discharged
battery pack or a battery pack that has less than 50% of the total power remaining
when installed in the computer.
General checkout 29

Lenovo 3000 N500 Specifications

General

Bus type	FSB
Stepping	M0
Tjunction	100 °C
Processor cache	1 MB
Processor cores	2
System bus rate	- GT/s
Processor family	Intel Pentium Mobile
Processor series	Intel Pentium T3000 Series for Mobile
Processor socket	Socket 478
Processor codename	Merom
Processing Die size	143 mm²
Processor frequency	2.16 GHz
Processor cache type	L2
Processor lithography	65 nm
Processor manufacturer	Intel
Processor front side bus	667 MHz
Processor operating modes	64-bit
ECC supported by processor	No
Thermal Design Power (TDP)	35 W
CPU multiplier (bus/core ratio)	13
Number of Processing Die Transistors	291 M
HDD speed	5400 RPM
HDD interface	SATA
Card reader integrated	Yes
Total storage capacity	250 GB
Display surface	Matt
Display diagonal	15.4 \
Display resolution	1280 x 800 pixels
Native aspect ratio	16:10
Type	PC
Modem speed	56 Kbit/s
Wireless technology	IEEE 802.11a/g/n
Memory slots	2x SO-DIMM
Internal memory	2 GB
Internal memory type	DDR2-SDRAM
Maximum internal memory	4 GB
Memory layout (slots x size)	2 x 1 GB
Audio system	Conexant CX20561-12Z
Speaker power	2 W
Networking features	Ethernet/Fast Ethernet
Operating system installed	Windows Vista Business
Number of battery cells	6
Charging port type	DC-in jack
Serial ports quantity	0
USB 2.0 ports quantity	4
Cable lock slot type	IBM
Pointing device	Touchpad
Discrete graphics card model	Intel® GMA 4500MHD
Processor code	SLB3P
Processor ARK ID	35583

Weight and Dimensions

Depth	256.5 mm
Width	358.5 mm
Height	37 mm
Weight	2740 g