User manual ACER ASPIRE M1641

[. . . ] The blackened pin of a jumper represents pin 1. System Board 1-5 1. 2. 2 Jumper Settings Table 1-1 lists the system board jumpers with their corresponding settings and functions. Table 1-1 System Board Jumper Settings Setting 1-2* 2-3 1-2 2-3* 1-2 2-3* Function For models with Acer BIOS For models with OEM BIOS Check password Bypass password (For Intel 28F001 only) Jumper BIOS Type JP1 Password Check JP2 Boot Block Feature1 JP3 Enable Flash ROM boot block feature Disable Flash ROM boot block feature EPROM Flash ROM (Intel 28F010, 28F001) Flash ROM (SST 29EE010) BIOS ROM Type JP5 1-2 2-3 3-4* CPU Core/Host Bus Frequency JP4 1-4 2-5* 3-6 1-2*, 1-2* 75/50 MHz 90/60, 120/60, 150/60 MHz 100/66, 133/66, 167/66 MHz 256 KB All other setting combinations are reserved. Second-level Cache JP6, JP7 * 1 Default setting The boot block feature works only for Intel 28F001 Flash ROM and requires JP5 to be set to pins 2-3. 1-6 User's Guide Table 1-1 Jumper CPU Type JP8 System Board Jumper Settings (continued) Setting 1-2* 2-3 Function Intel P54C or AMD K5 Cyrix M1 Intel P54C Intel P55C M1 and K5 CPU Core / Local Bus Clock Ratio JP16, JP19 1-2*, 1-2* 1-2, 2-3 2-3, 1-2 2-3, 2-3 3/2 2/1 3/1 5/2 3/1 2/1 3/2, 2/1, 3/1 1/1 CPU Voltage JP21 LED Support JP23 1-2* 2-3 1-2 2-3* 3. 3825V for VR and standard CPU type 3. 5250V for VRE CPU type For IDE and diskette drives For IDE drive only The jumpers JP10 ~ JP15 and JP17 are always closed if there is no voltage regulator module (VRM) present. * Default setting System Board 1-7 1. 2. 3 Connector Functions Table 1-2 lists the different connectors on the system board and their respective functions. Table 1-2 Connector Functions Function Audio-I/O board connector Fax/voice modem connector Video feature connector WaveTable connector CD-audio line-in connector Feature connector for multimedia or Ethernet solution IDE channel 1 IDE channel 2 Diskette drive connector Power connector Standby power connector Multifunction connector IrDA connector Hard disk drive LED connector Hard disk drive LED connector (generic) SMM switch/Reset switch Connector CN1 CN2 CN4 CN5 CN6 CN7 CN8 CN9 CN10 CN11 CN12 CN14 CN15 CN16 CN17 CNX1 1-8 User's Guide The multifunction connector CN14 accommodates the front panel connectors for speaker, LEDs, keylock, reset, and turbo. Figure 1-5 shows the CN14 pin assignments for each of the front panel connectors. Figure 1-5 20-Pin Multifunction Connector (CN14) The connector CNX1 functions as SMM switch, as reset switch, or both, depending on the settings. Figure 1-6 shows the CNX1 settings with their corresponding functions. SMM Switch (1-2) Reset Switch (3-4) SMM Switch (1-2) Reset Switch (3-4) Front Panel Reset Switch Figure 1-6 SMM/Reset Connector (CNX1) System Board 1-9 1. 3 ESD Precautions (ESD) Always observe the following electrostatic discharge precautions before installing a system component: 1. 2. Do not remove a component from its antistatic packaging until you are ready to install it. [. . . ] Wear a wrist grounding strap before handling electronic components. Wrist grounding straps are available at most electronic component stores. Do not attempt the procedures described in the following sections unless you are a qualified technician. 1-10 User's Guide 1. 4 Memory Upgrade The system board comes with four 72-pin SIMM sockets that support 4-MB and 16-MB single-density SIMMs and 8-MB and 32-MB doubledensity SIMMs. Table 1-3 lists the possible memory configurations. Table 1-3 Memory Configurations Bank 0 Bank 1 SIMM-3 4 MB SIMM-4 4 MB 8 MB 4 MB 8 MB 4 MB 8 MB 16 MB 16 MB 4 MB 16 MB 8 MB 16 MB 32 MB 32 MB 4 MB 32 MB 8 MB 32 MB 16 MB 32 MB 4 MB 8 MB 4 MB 4 MB 8 MB 8 MB 16 MB 4 MB 16 MB 8 MB 16 MB 16 MB 32 MB 4 MB 32 MB 8 MB 32 MB 16 MB 32 MB 32 MB 8 MB 4 MB 8 MB 4 MB 8 MB 16 MB 16 MB 4 MB 16 MB 8 MB 16 MB 32 MB 32 MB 4 MB 32 MB 8 MB 32 MB 16 MB 32 MB Total Memory 8 MB 8 MB 16 MB 16 MB 16 MB 24 MB 24 MB 32 MB 32 MB 32 MB 40 MB 40 MB 48 MB 48 MB 64 MB 64 MB 64 MB 72 MB 72 MB 80 MB 80 MB 96 MB 96 MB 128 MB SIMM-1 4 MB 8 MB 4 MB 4 MB 8 MB 8 MB 16 MB 4 MB 16 MB 8 MB 16 MB 16 MB 32 MB 4 MB 32 MB 8 MB 32 MB 16 MB 32 MB 32 MB SIMM-2 System Board 1-11 1. 4. 1 Installing a SIMM Follow these steps to install a SIMM: 1. Slip a SIMM at a 45° angle with the component side facing down into the socket labeled SIMM-1. Be careful when inserting SIMMs to avoid damaging the SIMM or the socket. 2. Gently press the SIMM up until the pegs of the socket fit into the holes on the SIMM and the holding clips lock the SIMM into position. The SIMM should be at a 90° angle when installed. Hole Peg Clip Figure 1-7 Installing a SIMM 1-12 User's Guide 1. 4. 2 Removing a SIMM Follow these steps to remove a SIMM: 1. Press the holding clips on both sides of the SIMM outward to release it. Figure 1-8 2. 3. Removing a SIMM Move the SIMM to a 45° angle. Pull the SIMM out of the socket. Always remove SIMMs from the socket labeled SIMM-4, then SIMM-3, and so on. System Board 1-13 1. 4. 3 Reconfiguring the System You must enter Setup after installing or removing SIMMs to reconfigure the system. Follow these steps to reconfigure the system: 1. A memory error message appears, indicating that the total memory does not match the value stored in CMOS. Since external speakers, microphone, and other audio devices give better sound quality, the external audio ports take higher priority than the internal connectors. When you attach external audio devices to the ports, the internal audio devices are automatically disabled. System Board 1-19 1. 8. 2 Audio-I/O Devices Figure 1-14 shows the various devices that you can connect to the audio-I/O board. Microphone Synthesizer CD Player Stereo Amplifier Head phones Joystick Speakers MIDI Adapter Figure 1-14 Audio I/O External Devices 1-20 User's Guide 1. 9 Error Messages Do not continue using the computer if you receive an error message of any type. Note the message and take corrective action. This section explains the different types of error messages and corresponding corrective measures. There are two general types of error messages: · · Software System 1. 9. 1 Software Error Messages Software error messages are returned by your operating system or application. These messages typically occur after you boot the operating system or when you run your applications. If you receive this type of message, consult your application or operating system manual for help. 1. 9. 2 System Error Messages A system error message indicates a problem with the computer itself. A message of this type normally appears during the power-on self-test, before the operating system prompt appears. Table 1-5 lists the system error messages. System Board 1-21 Table 1-5 System Error Messages Message Action Replace the RTC chip or contact your dealer. Check the RTC chip and the necessary jumper. [. . . ] Table 1-5 lists the system error messages. System Board 1-21 Table 1-5 System Error Messages Message Action Replace the RTC chip or contact your dealer. Check the RTC chip and the necessary jumper. If the battery is still good, run Setup. Run Setup Check and connect the control cable to the diskette controller. [. . . ]