Lenovo ThinkPad X220 Maintenance Manual

Performoperationalcharging.Ifthebatterystatusindicatororicondoesnotturnon,removethebattery
packandletitreturntoroomtemperature.Reinstallthebatterypack.Ifthechargeindicatororiconstilldoes
notturnon,replacethebatterypack.
Ifthechargeindicatorstilldoesnotturnon,replacethesystemboard.Thenreinstallthebatterypack.Ifitis
stillnotcharged,gotothenextsection.
Checkingthebatterypack
BatterychargingdoesnotstartuntilthePowerManagerBatteryGaugeshowsthatlessthan96%ofthe
totalpowerremains;underthisconditionthebatterypackcanchargeto100%ofitscapacity.Thisprotects
thebatterypackfrombeingoverchargedorfromhavingashortenedlife.
Tocheckyourbattery,moveyourcursortothePowerManagerBatteryGaugeiconintheicontrayofthe
Windowstaskbarandwaitforamoment(butdonotclick),andthepercentageofbatterypowerremaining
isdisplayed.Togetdetailedinformationaboutthebattery,double-clickthePowerManagerBattery
Gaugeicon.
Note:Ifthebatterypackbecomeshot,itmaynotbeabletocharge.Removeitfromthecomputerandleave
itatroomtemperatureforawhile.Afteritcoolsdown,reinstallandrechargeit.
Tocheckthebatterypack,dothefollowing:
1.Poweroffthecomputer.
2.Removethebatterypackandmeasurethevoltagebetweenbatteryterminals1(+)and7(-).Seethe
followinggure:
Terminal
Voltage(Vdc)
1+0to+16.8
7
Ground(-)
1(+)
2(+)
3
4
5
6(-)
7(-)
3.Ifthevoltageislessthan+11.0Vdc,thebatterypackhasbeendischarged.
Note:Rechargingwilltakeatleast3hours,eveniftheindicatordoesnotturnon.
Ifthevoltageisstilllessthan+11.0Vdcafterrecharging,replacethebattery.
4.Ifthevoltageismorethan+11.0Vdc,measuretheresistancebetweenbatteryterminals5and7.
Theresistancemustbe4to30KΩ.Iftheresistanceisnotcorrect,replacethebatterypack.Ifthe
resistanceiscorrect,replacethesystemboard.
Checkingthebackupbattery
Dothefollowing:
1.Poweroffthecomputer,andunplugtheacpoweradapterfromit.
2.Turnthecomputerupsidedown.
3.Removethebatterypack(see“1020Batterypack”onpage61).
4.Removethebackupbattery(see“1080Backupbattery”onpage71).
5.Measurethevoltageofthebackupbattery.Seethefollowinggure.
34HardwareMaintenanceManual

Lenovo ThinkPad X220 Specifications

General

Bus type	DMI
Stepping	J1
Tjunction	100 °C
Processor cache	3 MB
Processor cores	2
Processor model	i5-2520M
System bus rate	5 GT/s
Processor family	Intel® Core™ i5
Processor series	Intel Core i5-2500 Mobile Series
Processor socket	Socket 988
Processor threads	4
Processor codename	Sandy Bridge
Processor frequency	2.5 GHz
Processor cache type	Smart Cache
Processor lithography	32 nm
Processor manufacturer	Intel
Processor front side bus	- MHz
PCI Express slots version	2.0
Processor boost frequency	3.2 GHz
Processor operating modes	64-bit
ECC supported by processor	No
PCI Express configurations	1x16, 2x8, 1x8+2x4
Thermal Design Power (TDP)	35 W
CPU multiplier (bus/core ratio)	25
Maximum number of PCI Express lanes	16
Internal memory	4 GB
Memory clock speed	1333 MHz
Maximum internal memory	8 GB
HDD capacity	160 GB
SSD capacity	The Solid State Drive's storage capacity in Gigabytes.
HDD interface	SATA
Card reader integrated	Yes
Compatible memory cards	SD
Display diagonal	12.5 \
Display resolution	1366 x 768 pixels
Native aspect ratio	16:9
Graphics card	HD Graphics
Power supply type	AC/DC
Wireless technology	802.11a/g/n
Compatible operating systems	Windows 7 Home Basic Windows 7 Home Premium Windows 7 Professional
Charging port type	DC-in jack
USB 2.0 ports quantity	3
Ethernet LAN (RJ-45) ports	1
Operating system installed	Windows 7 Professional
Form factor	Convertible (Swivel)
Product type	Hybrid (2-in-1)
Product color	Black
Processor code	SR048
Processor ARK ID	52229
Processor package size	37.5 x 37.5 (rPGA988B); 31 x 24 (BGA1023) mm
Supported instruction sets	AVX
Intel Identity Protection Technology version	1.00
On-board graphics card ID	0x116
On-board graphics card model	Intel® HD Graphics 3000
On-board graphics card family	Intel® HD Graphics
On-board graphics card base frequency	650 MHz
On-board graphics card dynamic frequency (max)	1300 MHz

Weight and Dimensions

Depth	228.7 mm
Width	305 mm
Height	31.3 mm
Weight	1760 g