Acer Aspire 5741g Service Guide

							Chapter 5151
USB/B Board
Power Board
ITEMDESCRIPTION
JUSB1/JUSB2 USB Connector
ITEMDESCRIPTIONITEMDESCRIPTION
LED1 For NEW70 ON/OFF LED LED9 For NEW50 WWAN LED
LED2 For NEW80 ON/OFF LED LED10 For NEW70 WLAN LED
LED3 For NEW90 ON/OFF LED LED11 For NEW50 POWER LED
LED4 For NEW70 MEDIA LED LED12 For NEW50/NEW90 WLAN LED
LED5 For NEW80 MEDIA LED SW1 For NEW70 Power BTN
LED6 For NEW50/NEW90 MEDIA LED SW2 For NEW80 Power BTN
LED7 For NEW70 WWAN LED SW3 For NEW90 Power BTN
LED8 For NEW80 WLAN LED 
						

							152Chapter 5
3G/B Board
CR/B Board
ITEMDESCRIPTION
JMINI2 Connect to WWAN
JSIM1 SIM card connector
JP1 Connector to MB (FFC)
ITEMDESCRIPTION
JREAD1 Card reader connector 
						

							Chapter 5153
Clearing Password Check and BIOS Recovery
This section provides you with the standard operating procedures of clearing password and BIOS recovery for 
the Aspire 5741/5741G. The machine provides one Hardware Open Gap on main board for clearing password 
check, and one Hotkey for enabling BIOS Recovery.
Clearing Password Check
Steps for Clearing BIOS Password Check
If users set BIOS Password (Supervisor Password and/or User Password) for a security reason, BIOS will ask 
the password during systems POST or when systems enter to BIOS Setup menu. However, once it is 
necessary to bypass the password check, users need to short the HW Gap to clear the password by the 
following steps:
1.Power Off the system, and remove HDD, AC and Battery from the machine.
2.Disconnect the RTC Battery cable and locate the RTC_RST jumper.
3.Use an electric conductivity tool to short the two points of the HW Gap.
4.Plug in AC, keeping the HW Gap shorted. Press Power Button utill BIOS POST is finished, then remove 
the tool from the HW Gap.
5.Restart the system. Press F2 key to enter BIOS Setup menu.
6.If there is no Password request, BIOS Password is cleared. Otherwise, please follow the steps and try 
again.
NOTE: These steps are only for clearing BIOS Password (Supervisor Password and User Password).
Clear CMOS Jumper
ItemDescription
RTC_RST Clear CMOS Jumper 
						

							154Chapter 5
BIOS Recovery by Crisis Disk
BIOS Recovery Boot Block:
BIOS Recovery Boot Block is a special block of BIOS. It is used to boot up the system with minimum BIOS 
initialization. Users can enable this feature to restore the BIOS firmware to a successful one once the previous 
BIOS flashing process failed.
BIOS Recovery Hotkey:
The system provides a function hotkey: Fn+Esc, for enable BIOS Recovery process when system is powered 
on during BIOS POST. To use this function, it is strongly recommended to have the AC adapter and Battery 
present. If this function is enabled, the system will force the BIOS to enter a special BIOS block, called Boot 
Block.
Steps for BIOS Recovery from USB Storage:
Before doing this, prepare the Crisis USB key. The Crisis USB key could be made by executing the Crisis Disk 
program in another system with Windows XP OS.
Follow the steps below:
1.Format the USB storage disk using the Fast Format option. 
2.Save ROM file (file name: NEW70x64.fd) to the root directory of USB storage. Make sure that there is no 
other BIOS file saved in the same directory.
3.Plug USB storage into USB port.
4.Press Fn + ESC button then plug in AC power.
The Power button flashes once.
5.Press Power button to initiate system CRISIS mode.
When CRISIS is complete, the system auto restarts with a workable BIOS. 
6.Update the latest version BIOS for this machine by regular BIOS flashing process. 
						

							Chapter 6155
FRU (Field Replaceable Unit) List
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of Aspire 5741/5741G. Refer to this 
chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization).
Please note that WHEN ORDERING FRU PARTS, you should check the most up-to-date information available on your 
regional web or channel. For whatever reasons a part number change is made, it will not be noted on the printed Service 
Guide. For ACER AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT part number code from 
those given in the FRU list of this printed Service Guide. You MUST use the local FRU list provided by your regional Acer 
office to order FRU parts for repair and service of customer machines.
NOTE: To scrap or to return the defective parts, you should follow the local government ordinance or regulations on how to 
dispose it properly, or follow the rules set by your regional Acer office on how to return it.
Chapter 6 
						

							156Chapter 6
Aspire 5741/5741G Exploded Diagrams
Main Assembly
No.DescriptionAcer P/N
1 Keyboard KB.I170A.056
2 Upper Cover 60.PSV02.001
3 CPU KC.52001.DMP
4 USB Board 55.PSV02.003
5 Card Reader Board 55.PSV02.002
6 Thermal Module 60.PSV02.005
7 Mainboard MB.PSV02.001
8 Lower Cover 60.PSV02.002
1
2
3
4
56
7
8 
						

							Chapter 6157
Upper Assembly
No.DescriptionAcer P/N
1 Touchpad Bracket 33.PSV02.001
2 Touchpad Cable 50.PSV02.004
3 Touchpad board TBD
4 Touchpad Assy TBD
5 Powerboard Cable TBD
Speaker Right 23.PSV02.002
Speaker Left 23.PSV02.003
Upper Cover 60.PSV02.001
1
2
3
4
5
6
7
8 
						

							158Chapter 6
LCD Assembly
No.DescriptionAcer P/N
1 LCD Bracket (L) 33.PSV02.004
2 LVDS Cable 50.PSW02.002
3 ANTENNA WLAN-
MAIN50.PSV02.005
4 Microphone Cable 23.PSV02.001
5 LCD Bezel 60.PSW02.001
6 LCD Bracket (R) 33.PSV02.004
7 LCD Panel LK.15605.010
8 ANTENNA WLAN-
AUX50.PSV02.006
9 Web Camera Module 57.PSV02.001
1
2
3
456
7
8
9
10 
						

							Chapter 6159
10 LCD Cover 60.PSV02.003
No.DescriptionAcer P/N 
						

							160Chapter 6
Aspire 5741/5741G FRU List
CATEGORYAcer Description AcerPN
BOARD
FOXCONN BLUETOOTH BRM 2046 BT2.1 (T60H928.33) 
F/W:861BH.21100.004
TBD
FOXCONN BLUETOOTH ATH AR3011 BH.21100.005
POWER BOARD FOR 3G 55.PSV02.001
POWER BOARD FOR W/O 3G 55.PSV02.006
CARD READER BOARD 55.PSV02.002
USB BOARD 55.PSV02.003
3G BOARD 55.PSV02.004
FOXCONN WIRELESS LAN ATHEROS HB93 2X2 BGN 
(HM)NI.23600.062
QMI WIRELESS LAN ATHEROS HB93 2X2 BGN (HM) 
EM306NI.23600.064
 TBD
FOXCONN WIRELSS LAN ATHEROS HB95 1X1 BG (HM) NI.23600.047
FOXCONN WIRELESS LAN BROADCOMM 43225 2X2 
BGN (HM) T77H103.00NI.23600.066
3G CARD HUAWEI EM770W LC.21300.008
CABLE
BLUE TOOTH CABLE-8PIN 50.PSV02.001
BLUE TOOTH CABLE-6PIN 50.PSV02.002
3G CABLE 50.PSV02.003
TP FFC 50.PSV02.004
DC-IN CABLE-65W 50.PSV02.011
DC-IN CABLE-90W 50.PTD02.001