Why this modification ?

Lapwing

Member

Join Date: Feb 2015

Posts: 40

Country: UK
#1

Why this modification ?

04-18-2016, 09:36 AM

Iam a newbie when it comes to this electronics stuff.

Now i have two radio/cd players that are the exact same model but have different revisions for the PCB.

I just wondered what the thinking was for the extra Diode on the newer pcb ?
Tags: None
mariushm

Badcaps Legend

Join Date: May 2011

Posts: 3799
#2

04-18-2016, 09:58 AM

Re: Why this modification ?

Higher voltage drop, more surface to dissipate heat on , that's pretty much it.
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budm

Badcaps Legend

Join Date: Feb 2010

Posts: 40746

Country: USA
#3

04-18-2016, 10:30 AM

Re: Why this modification ?

It looks like the board lay out has D14 and D15 connected in series and someone put a solder bridge to bypass D14, so basically right now D14 is not used, but D15 is used as the same function as D14 in the original board.

Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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Why this modification ?

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