Re: WRT54G fried - plugged AC into a DC device. D'oh. Any suggestions?

On Thu, 24 May 2007 02:32:41 GMT, Kim Clay <kimclay@xxxxxxxxxxxxx>
wrote:
<snip>
Here is a partial schematic I had made (ascii art)

+------>7705 chip
|
Jack1(+)--L2---F1---+-----+-----+-----+-----|>|--->SMPS
(-) | | | | 0.188V
| +-----+ | | |
| 1000uF| _|_ --- --- ---
L1 16V --- /_\ --- --- ---
| 105° --- | | | |
_|_ _|_ _|_ _|_ _|_ _|_
- - - - - -
ID= DS1 CK1 CA3 C3 D1

Device Zss smt smt smt Zss
ID 33 chip chip chip 33

"F1" is the yellow thing directly behind the pwr input jack.

I found a detailed pic of the Version 1 and 2 routers side by side at...
<http://seattlewireless.net/~mattw/gallery/gear/IMG_5059?full=1>
~1.8M

Directly below the yellow "F1" PolySwitch device are the devices I
mention on the schematic...
DS1 (slightly offset to the pcb edge)
CK1
CA3
C3
D1

Next to D1 is the RT9202 switch regulator

<snip>

What I did discover is that the +5V also goes to a TI 7705AC chip at the
front edge of the main pcb & under the radio card. Its a "Supply Voltage
Supervisor" chip monitoring the health of the +5V line.

The 7705 chip pdf shows...
Vcc: 3.5-18 V
Vsense: Recommended Max= 10V

<snip>

The above pic also clearly shows the location of the TI 7705AC chip, as
the radio card has been removed.
It is at the front edge of the pcb directly inline with the front
"guide/retainer" for the radio card.

Another set of good pics can be found at...
<http://web.archive.org/web/20040630152956/seattlewireless.net/~mattw/photos/linksyswrt54g/gallery/>

including this pic of the FCCID tag on the bottom of the V1 unit
<http://web.archive.org/web/20040912091710/seattlewireless.net/~mattw/photos/linksyswrt54g/gallery/fullsize/IMG_3392.JPG>

kc
.

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