Question about Yamaha RX-V2400 Receiver
When I connect the power cord to the unit I don't hear the clicking sound to indicate that it went into standby mode, therefore, when I push the standby/poweron switch it will not turn on. Any suggestions?
SOURCE: Not powering on
1. The power cord is not completely insered. 2. the impedance selector switch on the rear panel is not fully set to the upper or lower end - (set it when the unit is in the standby mode) other then that, you will have to call for a service.
Posted on Nov 27, 2005
SOURCE: No Power
in your power board near the back of transformer you have a backup power source of 5volts. that is for the cpu and the power relay swicth. can you check if you have that 5volts present. What i can see only in your unit is a major brekadown of your main amp section, all power transistros must be busted/shorted, and no chance even for a click on the relay. that is also feature of the protection. you wont be able to get the unit started even for a while. the fuses for yamaha do not normally blow and very often only your protection circuits enables. but in your case it is a very bad output stage now that you dont even get the display on to see the trouble in the built in diagnosis.
Posted on May 14, 2008
SOURCE: Yamaha RX-V1 Power
Got the same problem and did some searching.
Strange thing is that next day the amp works fine.
This is what I found on http://www.forums.hcsd.com.au/Blah.pl?m-1210733289/s-8/
SYMPTOM: The power cannot be turned on, or the protection circuit is activated to turn off the power.
CAUSE: Fluid leakage occurs from the backup capacitor C633 0.047F 5.5V (C662 in the case of RX-V3000/DSP-AX2) on the Function PCB and causes a short with the adjacent components and between patterns, resulting in operation of the protection circuit. Fluid leakage tends to occur with this capacitor particularly with high internal cabinet temperatures, with or without the power on. Often, the leakage is only visible with very careful inspection.
SOLUTION: Two types of backup capacitors are now available with a longer expected service life. When servicing, thoroughly clean the leaked fluid from the PCB and from under any nearby components before replacing the capacitor. There are models other than those mentioned above that use the subject backup capacitor. Check them for fluid leakage and replace the capacitor as needed.
Ref. No. Part No. Description Remarks
V3860300 ELECTROLYTIC CAP 0.047F/5.5V Vertical type
* VU545000 ELECTROLYTIC CAP 0.047F/5.5V
Ref. No. Part No. Description Remarks
C662 WD294400 ELECTROLYTIC CAP 0.047F/5.5V Vertical type
* WD292000 ELECTROLYTIC CAP 0.047F/5.5V Horizontal type
Posted on Jun 24, 2008
These units have protection circuits that will prevent the speaker relay from engaging if there is a problem detected. There is also a circuit that causes a delay in the engaging of the relay to allow the amp to "settle in". This prevents the old "thump" that was common in older models when the set was first turned on. In your case, either the RC circuit is faulty causing excessive time to pass before turning on the relay, or there is excessive voltage floating around that the protection circuits are detecting and thus preventing the relay from turning on.
In any case, this will require additional diagnosis using some test equipment. This is not a problem that will be easily resolved remotely. Please bring this unit to a repair shop for an estimate. Once you have that info, we can assist with the actual repair.
Posted on Aug 25, 2009
I am sure you have tried and disconnecting all the speakers and taking the unit to another outlet right? If it works you fried your surge and need to replace it. Otherwise the unit went into that strange power protection mode
Posted on Sep 12, 2010
That your amp does not go into the second stage of powering up indicates a fault which is causing it to sit in non-active mode. This could be due to blown output audio module or transistors or a fault in the safety circuit itself. It is not a fault the non-technician can repair and it would need to be sent to an authorized workshop.
I have seen situations where users unknowingly leave frayed ends of wire shorting across the speaker output terminals which can lead to this sort of fault. You could check this out also.
Posted on Oct 28, 2011
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In some cases, the STANDBY indicator may blink slowly, twice per second. In this case, turn off the unit, unplug the power cord, and check the following points.
Make sure the speaker cables are not reversed and connected to the wrong sides (+ and -) on the unit.
Make sure the speaker cables connected to the unit are not shorted. (Check both the unit end and the speaker end.)
Make sure the volume does not exceed the level that the unit is capable of producing.
When using the unit in a rack or other enclosed space, heat may build up inside the unit and cause a fire. When installing the unit, be sure to leave suffi cient space between the top, back and both sides of the unit and walls or other AV components to prevent the internal temperature from rising.
After checking these points, plug in the power cord and use the remote controller to turn on the unit. Turn down the volume before resuming playback. Confirm that there are no problems with the speaker connections and playback performance.
If this symptom recurs, request service at your nearest service center.
In rare instances, the unit may enter standby mode and the STANDBY indicator may blink rapidly, 8 times per second. In this case, unplug the power cord and request service at your nearest service center.
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