TallyGenicom 6300 Series Maintenance Manual

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Contents

TallyGenicom 6300 Series Maintenance Manual Manual pdf 47 page image

Chapter 3. Faults and Troubleshooting413.4 Troubleshooting GuidesNot all printer problems are reported by an error message. Malfunctioning hardware can cause awide variety of problems without triggering a fault indication. The troubleshooting procedures inthis section will help you to repair hardware problems.3.4.1 Printer Does Not Power Up When Switched OnThere are four things that can cause this problem.1. A bad connection.2. A malfunctioning On/Off switch.3. Incorrect input power.4. A malfunctioning power supply.CAUTION: Input power voltages can be lethal. Be very careful while performingthese procedures.Step 1. Check all power connections.Is the printer plugged in?Are the connections on the On/Off switch secure?Are the input power connections on the Power Supply secure?Are the Power Supply connections to the Controller Board secure?Step 2. Check the input power supply voltage. Input power should be 90—130 VAC or180—264 VAC, single phase, 50 ± 3—60 ± 3 Hz. Check input power at the plug-in,on the Power Supply side of the On/Off switch, and on the input side of the PowerSupply.If input power at the plug-in is incorrect, either the printer power cord is defective orthe power supply is defective. Check power at the outlet to make sure the powersource voltage is correct. If the power source voltage is OK, the problem is in the cord.If input power at the plug-in is OK, check power from the On/Off switch to the PowerSupply. If there is no power at the back of the On/Off switch when it is switched On,the On/Off switch is defective and should be replaced.If input power is OK on the back of the On/Off switch, check input power on thePower Supply. If there is no input power at the Power Supply, the cabling from theOn/Off switch to the Power Supply is defective.Step 3. If input power to the printer Power Supply is OK, check output voltage of the PowerSupply. Power Supply output voltage should be approximately +48 V DC. If theoutput voltage is incorrect, remove and replace the Power Supply.