M
Madness
I've got an Apex 660 DVD player that I'm trying to repair. It's has very
low analog sound output (that is, you have to turn the TV all the way up
just to hear the sound). There's a separate circuit board that contains
the A/V outputs and associated circuitry.
I'm pretty sure that the two little JRC4580 op-amps on the board are the
problem. Trouble is: They're these little 4x4 SOIC chips soldered to the
BOTTOM of the board (whereas everything else on the top are conventional
through-board components). I found out via Mouser that the LM833 is an
equivelent that can replace the 4580.
My question is: How exactly does one desolder these things? Should I put
the board in the oven like that dude about a dozen posts up did w/ a
video card (I did get a bit of a laugh out of that)? Currently, I've
replaced all the electrolytics and a few transistors (S8050, 9014,
9015), but the problem still remains, which leads me to suspect the chips.
low analog sound output (that is, you have to turn the TV all the way up
just to hear the sound). There's a separate circuit board that contains
the A/V outputs and associated circuitry.
I'm pretty sure that the two little JRC4580 op-amps on the board are the
problem. Trouble is: They're these little 4x4 SOIC chips soldered to the
BOTTOM of the board (whereas everything else on the top are conventional
through-board components). I found out via Mouser that the LM833 is an
equivelent that can replace the 4580.
My question is: How exactly does one desolder these things? Should I put
the board in the oven like that dude about a dozen posts up did w/ a
video card (I did get a bit of a laugh out of that)? Currently, I've
replaced all the electrolytics and a few transistors (S8050, 9014,
9015), but the problem still remains, which leads me to suspect the chips.