DCinDC
I'm here to fix it
WTH?
I started work on these two today. Look at the bottom pics attached.
The tone board is totally different and they have different filter and or protection boards.
SN 222110187 this is the newer one with the smaller tone board in the pics
has a tone board marked F-6010
has a power filter board marked F-6012
has a phono board marked F-6011
These numbers are not even in the board db and the number is so high you'd think it was either a service replacement or from a much newer unit!
SN 221030054 this is the 54th one made! and has the big board in the pics
has a tone board marked F-1316 this one has had lots of mods with cut traces and jumper wires.
has a power filter board marked F-1317
phono board preamp is incorporated into the tone board.
These numbers are not in the board db either.
These two receivers look identical from the top, but not the bottom! Both work, basically.
Does anyone have any clues? Does anyone have a schematic for the 7000 in electronic form they can send to me?
pics go old/new/old/new left to right below
I started work on these two today. Look at the bottom pics attached.
The tone board is totally different and they have different filter and or protection boards.
SN 222110187 this is the newer one with the smaller tone board in the pics
has a tone board marked F-6010
has a power filter board marked F-6012
has a phono board marked F-6011
These numbers are not even in the board db and the number is so high you'd think it was either a service replacement or from a much newer unit!
SN 221030054 this is the 54th one made! and has the big board in the pics
has a tone board marked F-1316 this one has had lots of mods with cut traces and jumper wires.
has a power filter board marked F-1317
phono board preamp is incorporated into the tone board.
These numbers are not in the board db either.
These two receivers look identical from the top, but not the bottom! Both work, basically.
Does anyone have any clues? Does anyone have a schematic for the 7000 in electronic form they can send to me?
pics go old/new/old/new left to right below
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