Re: Denon avr 2802 with no sound on speaker

Thanks for looking into it!!! I'll keep a look out for them. Perhaps I'll just order the ones from China and give them a shot. After all they aren't expensive! Will keep you posted.

Re: Denon avr 2802 with no sound on speaker

Hi sparx_59,

Fortunately I was able to get a couple of these bad boys from a local repair shop. However, I still need 1 of these suckers (for Denon AVR-5700)

Brand: Toshiba
Type: Flash (Top Boot Block)
Marking: TC58FVT800FT
Package: TSOP48

This is the same IC that has been used on AVR-3300 (I believe).

If you were able to find them, please give me a holler!!!

Thanks

Re: Denon avr 2802 with no sound on speaker

Hi Hi sparx_59,

My guess was accurate! Yesterday I decided to do a ROM dump, and both ROMs read and verified OK. A closer look at the chip revealed evidence of oxidation, so I decided to clean them up with ether. After securing them back into the sockets, the receiver works as suppose to. I've spent more than 4 hours testing all functions, using different sources, ie. DD, DTS, 5.1 External Analog, 2CH analog. They all work!!! As this point, I conclude that oxidation to the flash IC has caused problems related to DSP audio...

Re: Denon avr 2802 with no sound on speaker

Hi sparx_59,

Your discovery shed light into the way we troubleshoot such a complex receiver.
What I have in possession is a Denon AVR-5800 which doesn't process DSP but works fine in Pure Direct and Stereo mode. I've checked the unit thoroughly but still can't find the source of the problem. I know the problem has to be related to the DSP ICs but never thought about the possible corrupted firmware.
On AVR-5800, the DSP board has 2 REMOVABLE flash chips "SHARP LH28F800BVE-BTL90". These chips are...