Denon AVR-1508 Service Manual

Also see for AVR-1708: Specifications Comparison chart Specifications Service manual Service manual

Contents

Denon AVR-1508 Service Manual Manual pdf 10 page image

10AVR-1708/1508/688/588/488 AVC-1508TROUBLE SHOOTING1. POWER1.1. Power not turn on1.2. Fuse is blownPower not turn onIs the ON/STANDBY indicatoron the front panel flashing red?YESAre there any incomplete con-nections in the connectors con-necting between the variouscircuit boards?NO Is there a short circuit betweenthe speaker terminals and theground?YES Correct the short circuitbetween the speaker and theground.YES NONO Connect the connectors prop-erly.Check for damage in the poweramplifier circuitry parts andreplace any defective parts.Is the fuse blown? NO Refer to Fuse is blownYESDoes the power turn on whenthe POWER switch is turned offthen back on?NOIs a DC 6V voltage being sup-plied from the POWER B’d(CN505 pins 3 and 4) to themicroprocessor?NOIs a DC 6V voltage output whenthe cord supplying the powerfrom the SUPPLY B’d to themicroprocessor (CN511) isunplugged?NO Check the parts from IC807 tothe primary circuitry andreplace any defective parts.YES YES YESCheck the primary circuitryparts including the POWERswitch (for poor contacts, etc.),and replace any defectiveparts.Check the microprocessorperiphery circuitry and replaceany defective parts.Check the circuitry and partsfrom CN511 on the SUPPLYB’d to the microprocessor fordamage and short-circuits, andreplace any defective parts.Fuse is blownCheck for leaks or short circuitsin the primary side parts, andreplace any defective parts.Check for short circuits in therectifier diodes and circuitry ofthe secondary side rectifyingcircuits, and replace any defec-tive parts.Check for short circuits in thepower stabilizer unit's regula-tor output terminal and theground, and replace any defec-tive parts.After repairing, also replace the fuse.YES NO YESYES NONONOYESNO NO NOYES YES YES