ADSL猫常见故障与修复.doc

ADSL猫常见故障与修复Fame is the best of all. Park in love maple, red in February. The eyes are full of laughter and the six paladins are colorless. The road is not covered by the thread, but the spring and spring are black and yellow. The spring silkworm comes to death, the wax is dry and dry. Common failures and solutions for ADSL catsThe trouble 1 indicator is not brightMaintenanee method: replace the 34063 chip and replace the DBS104G rectifier bridgeReason: the power chip is damagedThe fauIt 2 indicator is all brightMaintenance method: replace the AT45DB161B chip and re-write the softwareReason: Flash chip damageThe fault 3 Lan lamp is not bright, can，t ping through192. 168. 1. 1Maintenance method: replace the RTL8201BL chipReason: the networks chip was struck by lightningFault 4 is often droppedMaintenance: check the software version number and upgrade ifthe version is too lowWhy: the version is too old and the old version is inherently flawedThe fault 5 Lan indicator is normal, can，t ping to 192. 168・ 1. 1, can，t do the web managementMaintenance method: the Modem default parameter is modified to restore the default value of the factoryReason: the parameters are modifiedFailure 6 only power lights, other lamps are not bright, and turn on not self-examinationMaintenance method: the device is not started, and the software is reprogrammed in the Flash chipReason: software damageOne, there are several power test points in MODEM maintenance, so be sure to understandThe main chip，s power supply voltage should be 1. 8 voltsThe network，s chip and FLASE, the power supply voltage of the SDREM is 3. 3 voltsSecond, ADSL MODEM mainLenanee common failureNote: the main cause of the failure of the following statement does not contain the external factors, such as: circuit, noise, electromagnetic interference, the operating system, network CARDS, dial-up software, etc. This is mainly due to the failure caused by the MODEM itself.A. without powerFailure description: all indicator lights are not bright・ The main cause of this failure is:1 because the power supply component or circuit board itself causes the circuit to open, so that no voltage input leads to no electricity・The electrical circuit is short-circuited by the component or circuit board itself, resulting in the absence of electricity・B. the introspection butFailure description: after the power of the device, the normal system self-check process can not be completed, the display status of the visual indicator lamp is very basic, the indicator lamp is in a flash or not flash・ The main cause of this failure is:2 Flash program corruption;The main chip, SDRM, the vibration, and the peripheral resistance container damage or the data line between the peripheral resistance vessels are open;The damage caused by the damage of the network chip and the analog chip is abnorma1.C. to restart again and againFailure description: in the process of electrical self-examination on the device, the system is restarted and re-entered into the self-checking process to repeat the process. The main cause of this failure is:1 Flash program corruption;The working voltage is not stable;Damage of the third reset key;4 main chip damaged・D. shock is not liveFailure description: the Link lamp flashes, cannot be bright, read not to the line of the road, the downward speed, indicates the MODEM and the local party equipment cannot establish the synchronization. The main cause of this failure is:Damage of component parts of the analog part;3 main chip damage or data line between analog and analog chip・4 Flash program damage・Low rate of e.Failure description: the upper and lower rate of the ADSL line is below the standard rate・ The main cause of this failure is:1 power capacitor damage parts to simulate mouth (leakage, filtering performance), make signal distortion, resulting in a loss, descending rate on;2 analog part of the mouth is proposed・ theoretical greaten, overall ring resistance value increases, line signal attenuation, so that the upper and down rate lower;Main chip, analog chip, ADSL coil, due to poor performance, aging, etc・Error code in ADSL dialingError 602 The port is already openProblem: the dial-up network network cannot be connected because of the device installation error or is being usedWhy: RasPPPoE is not fully and properly installedSolution: uninstall any PPPoE software and reinstall itError 605 always set port informationProblem: dial-up network network because device installation error cannot set the usage portWhy: RasPPPoE is not fully and properly installedSolution: uninstall any PPPoE software and reinstall itError 606 The port is not connectedProblem: the dial-up network cannot connect to the required device portReason: RasPPPoE does not have complete and proper installation, connection failure, and ADSL MODEM failureSolution: uninstall any PPPoE sof。