Denon AVR-2105 red light flashing

[ElecSeb]

What I am trying to explain, are BCE having the expected signals.
What you could do is solder the toshiba in, but leave E loose. Measure while playing if output is correct.
(put mono signal on FL and FR and compare the signal between the 2 transistors -> should be equal)

Or an other option is to place a known transistor from FR to FL and see what happens (probably it will also go in protect)

[commongrounder]

Something else to consider about the Toshiba transistors.  They could be counterfeit.  A common mistake made by counterfeiters is to fake label no-name conventional transistors with Darlington part numbers. I know, because I’ve had this happen myself. I bought the devices through a reputable distributor, too. Counterfeit semiconductors are a scourge!
By the way, when checking your transistors, be sure to use the diode test mode.  A Darlington will not show the same numbers a regular bipolar transistor will.  Measure a bunch of known good transistors to get familiar with the reading your particular meter gives for a diode or transistor junction. Then you can tell if something isn’t right. I wonder if those Toshibas are not Darlingtons? Just a thought.
Also, I just reread your post about testing the transistors.  A Darlington will have a different reading on the BE pins.  Look at the output transistors on the schematic.  The B to E connection passes through *two* junctions. This will normally give you approximately twice the regular reading on your diode test.  This particular transistor has a resistor across the BE junction of the power transistor section, so the reading will be a bit lower. If you get a single junction reading on BE, it isn’t a Darlington transistor.

[occhio37]

Good afternoon everyone! I have already received Sanken transistors and are already mounted on the amplifier. Everything is ok, all 7 channels working in full, "DENON AVR is alive and in good health"  . These Darlinghton Sanken transistors were measured (diode test) and are actually different from Toshiba (these must be counterfeited). I want to thank all the people who were helping with their tips 

[xoom]

Hello. Im dealing with same beast.. FL Channel have blown output transistors.. i cut legs off to make it work with other channels.. but it still in protect mode.. i see few resistors near blowen.. should i change them to get out of protection mode or they dont needed if i leave this channel dead?

[xoom]

Oh i think i see where its going.. there is like protection indication transistors Q104FL Q104SL Q104C and so on if i cut it out it should release that line.

Already did that and its alive not worth to replace parts as it already in bad condition.. was dumped in sweden and somebody took it from dump
Anyhow Thanks to this thread author to shed some light and god bless service manuals

Cheers.

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Other problem how without remote to turn on Channel B for Tuner?