caused by an AC short to case. My bad. Anyway, its appears that it took out some of the esd diode protection packs in the hdmi connector area on the digital board. Based on metering to ground, a number of the data pins are now grounded. :-( Hopefully, that is all that happened. I have tested the other hdmi inputs and they seem to work OK... fingers crossed.
My question is associated with the esd diode package / packaging. The yamaha service manual lists it as part zf358000 description ESD7004MUTAG. Looking for the component on-line, it appears that it is an SMD package... but the component on the board almost looks like it is a form of SOP (with side pins). I don't see any components of this type with side pins. Attached is a picture of some of them on the digital board. Is the "side bulges" just soldering squeezed out from the SMD (ie. solder balls)? Further, my experience with hot air soldering / desoldering is limited. Will I have issues with heating those areas up to remove those little guys ... and will it cause a problem to the components on the reverse side (ie. dropping off / moving)?
I am hoping this will save this avr as the board is fairly expensive. I am waiting on yamaha to indicate if it can even be had.
thanks for any guidance / help on this.
PS... what does the "4M7" on the body of the smd mean. I have a troubled hdmi switch which has similar smd's (ie. esd diodes?) that are 4CL on them. Are they the same?
My question is associated with the esd diode package / packaging. The yamaha service manual lists it as part zf358000 description ESD7004MUTAG. Looking for the component on-line, it appears that it is an SMD package... but the component on the board almost looks like it is a form of SOP (with side pins). I don't see any components of this type with side pins. Attached is a picture of some of them on the digital board. Is the "side bulges" just soldering squeezed out from the SMD (ie. solder balls)? Further, my experience with hot air soldering / desoldering is limited. Will I have issues with heating those areas up to remove those little guys ... and will it cause a problem to the components on the reverse side (ie. dropping off / moving)?
I am hoping this will save this avr as the board is fairly expensive. I am waiting on yamaha to indicate if it can even be had.
thanks for any guidance / help on this.
PS... what does the "4M7" on the body of the smd mean. I have a troubled hdmi switch which has similar smd's (ie. esd diodes?) that are 4CL on them. Are they the same?
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