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Hello, You have a nice piece of Stereo...I believe you have mistakenly selected the" display mode OFF" function..,Here is the info that you can reactivate it.. If you need a soft User Manual here is the link for it too.. Take care and please Remember to rate/vote and give me 4 Thumbs Up for Helping out the Community :)...please insert some words in "My Testimonials
" Hope this helps!
------------------ " display mode OFF"
You can select the display mode for the front display of the SR7001.To select this mode, press the DISPLAYon the remote control or the front panel.When this button is pressed, the display mode is switched in the following sequence.Input Mode?Surround Mode?Auto display OFF?Display OFF?Normal Mode?Input ModeNormal Mode:Displays the selected input function. If the function has been renamed using the Function Rename feature (see page 26), the renamed name appears on the display.Input Mode:Displays the input mode set via the Function Input Setup feature (see page 25).Surround Mode:Displays the status of the selected surround mode.Auto Display Off mode:The display is off. But, if you make a change to the unit such as the input or surround mode, the display will show that change, then go back to off after about 3 seconds. When changing the volume, it is not displayed.Display Off mode:The display is off completely.Note: • Only the DISP indicator will be illuminated on thefront display in display off condition http://www.scribd.com/doc/53431794/Marantz-SR-8001-Owners-Manual
The numbers you list are Marantz numbers. Given this unit's age, there is a possibility that these are germanium transistors which are no longer available. I will look up your specific model's service manual, but it would help to know the location of the transtors in question here.
Check for a stuck/jammed switch, press each switch if one doesn't make a normal click sound or it doesn't move at all that's your problem.
If that's not it check the owners manual for how to reset the receiver (not all manuals will tell you how to reset it) Another way to reset it is to short the memory cap, but that is better left to a tech.
Your unit's micro IC, is in need of a reset.Un-plug the unit and locate the semi large yellow capactor on the main board. (r-h side facing front) Now flip the unit over and look thru the vent holes in that same area and locate the two solder pins. Short them out with a thin metal object, like a straightened out paper clip or wire, and turn it over (just discharge the cap and remove your wire) this will default all settings and restore normal operation.
You have a worn power switch. After 30 years of turning a powerful receiver on and off, the contacts in the power switch become pitted and corroded, and just plain dirty - this is exacerbated in smoking environments. As the resistance in the contacts increases, it takes more "juice" to bridge the contacts, and this takes the form of hissing and sputtering. The best solution is to replace the power switch. These can usually be found on eBay for between $10 to $25 - just search for "Marantz power switch". You'll probably need to disassemble most of the front end of your receiver to get at the switch, and you'll need some soldering experience and tools to remove old and install the new. Once you do the job, however, it should last the rest of the life of the unit.
After 4 years of joy my Marantz SR8200 receiver also shows this message from time to time - after 1h of operation or so. Then it is hanging (like a PC ;o). Taking it of from the electricity network for a moment resolves the problem until the next POW 05 hang usually a fiew days later.
I brought the receiver to an authorized Marantz maintenance and repair center twice now and they were not able to reproduce the error.
They said this has directly or indirectly to do with the power supply unit. They also called marantz.
For me it appears that this is not an internal receiver problem IN MY CASE.
I think I there might be a relationship to zapping on my Topfield SAT receiver via power supply network as the connection is optical. Or my dimmerunit for the light. Unfortunately I do not have a separate electric circuit for Audio/Video and all other electrical devices. and dimmer units are well known to cause problems in the power supply chain - e.g. like noise in your audio package.
Please note: the experts told me: Check POW 05 can have other (receiver internal) causes also. Above is just my suspicion 8as a non-expert) for my case .
It is likely that the PA stage has developed an offset voltage in the output stage. The faulty amplifier channel can be found by progressively disconnecting the collectors of the of the power transistors until the protection fault disappears. Once the faulty channel is found the the cause of the offset has to be traced to the faulty transistor or resistor. Don't forget that if you can smell smoke or burning then there are likely to be components(esp transistors) that have been damaged by the fault. I had a Luxman unit that destroyed 5 transistors in the output stage that was due to an open .5W resistor in the driver stage. Good luck.
You have a problem in the main power supply or the output circuit in this reciver. If you have any solid state repair experience, go inside and unsolder or take out the main output devices, and try to turn on the unit. If it still does not come on, your going to need to troubleshoot the power supply. If it does come on then the output devices you took out are bad. If you have no training in this stuff, seek out a pro to assist you in this repair. There are no user replaceable parts inside these units. Good Luck