On Tue, 19 Feb 2008 12:26:46 -0000, "N Cook" put
finger to keyboard and composed:

N Cook wrote in message
...
Franc Zabkar wrote in message
...
On Mon, 18 Feb 2008 15:52:51 -0000, "N Cook" put
finger to keyboard and composed:

or model AD-L528, 2 labels
from cold , a part second, partial feint display on the fluorescent,
then
nothing.
All voltages agree with legends of 3.3,5,12,-20V dc and 4.4V ac to the
display. Standby voltage of 2.1V on switching power on.
Anyone know what the RAT of designator RAT5V stands for as it is only
1.4V
on one of the lines to/from? the ps

Which chipset does it use?

- Franc Zabkar

My measurement at fault RAT5V has 5V to the display/front controls board
with a PT6311 but no bus signals to it from the main board.
Main board main chip has a bonded heatsink over it,
Winbond 130 WG , CS4955 etc, but no activity on the board.
About 60 electrolytics and no IC protectors spied and likes of basic
LM1458
have correct DC.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/




The heatsink will twist off the main chip quite easily.
Crystal CS98010CMEP

Maybe I'm confused, but I think you'll find that's Cirrus Logic. In
1991 Cirrus Logic acquired Crystal Semiconductor.

all electros check out
27MHz oscillation at the crystal oscillator and 5V is passed through the
gatekeeper KIA70 31AP and 3.3V rail is continuous to the Crystal chip

Sorry, I don't have a reference design circuit for that chip. All I
can suggest is to disconnect the IDE cable from the DVD drive to see
if that is hanging up the machine.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.