Denon AVR-2312 Service Manual

Also see for AVR-2312: Owner's manual Protocol guide Getting started

Contents

75TROUBLE SHOOTING1. POWER1.1. Power not turn onYES YESYESNONOYESNONO0.6V or -0.6VWhen the power turned on,does the ON/STANDBYindicator on the front panelflashing green?Is the fuse blown?About 10 seconds later,does the ON/STANDBYindicator on the front panelturn lighting green ?Check voltage of CN704 (1-5PIN) of HDMI B'D while theON/STANDBY indicator isflashing green.Pull out connector (CN781) ofSPK BD, and check "2. Errorschecking mode".(Refer to 20 page.)Power not turn on.Is the fuse blown?When the power turned on,does the ON/STANDBYindicator on the front panelflashing red?Is a DC 5V voltage beingsupplied from the SMPS B'D(BN903) to the HDMI B'D?Refer to 1.2.Fuse is blown.Refer to 1.2. Fuse is blown.Check circuitry and parts from CN704 onthe HDMI B'D to the μ-com for damageand shortcircuits, and replace anydefective parts.Check "2. Errorschecking mode".(Refer to 20page.)Are there any incompleteconnections in the connectorsconnecting between thevarious circuit boards?Is a DC 5V voltage outputwhen the cord supplying thepower from the SMPS B'Dto the HDMI B'D (CN903) isunplugged?Check μ-com peripherycircuitry of HDMI B'D andreplace any defective parts.Check circuitry and parts fromCN903 on the HDMI B'D to theμ-com power supply for damageand shortcircuits, and replaceany defective parts.Connect the connectors properly.To troubleshooting6. SMPS.(Refer to 97page.)NOYESYES0VYES NONO NOCheck for leaks or shortcircuits in the primary sideparts, and replace anydefective parts.Fuse is blownCheck for short circuits in therectifier diodes and circuitry ofthe secondary side rectifyingcircuits, and replace anydefective parts.After repairing, also replace the fuse.Check for short circuits inthe power stabilizer unit'sregulator output terminal andthe ground, and replace anydefective parts.1.2. Fuse is blownYES