Barco Galaxy WARP Owner's manual

Barco
Brand
Barco
Model
Galaxy WARP
Type
Owner's manual
Barco Presentation and Simulation
SERVICE INFORMATION BULLETIN INFOT
Serial number:552
Date: 12122003
Product: Galaxy Warp
TM
InfoT Priority Code
A
”Must” modification, Barco will provide the necessary components to perform this modification
at no charge.
B
Improves the reliability of the product.
C Improves the general working conditions of the product.
D
For information only.
SMPS ADAPTATION FOR STARTUP ERRORS + ER-
ROR 3003
Introduction
Due to the relative high consumption of the Warp
TM
board, the 3V3 supply stabilization is sometimes
subject to tr
ansients influencing the Power Good line.
Priority as
sessment
Priority
A B
C
D
Symptoms
Power Good failure
The Power Good lineisused to monitorseveralvoltagestoinsure properfunctioningofthe variousboards
(formatter,...). However, some spurious events may trigger a Power Good failure.
What can trigger the Power Good failure ?
1. Spikes on the 3V3 overvoltage circuit may lead to a spurious “overvoltage” status.
Errors during Startup
In some cases I9 can go in latch-up causing the projector to switch off again. this can be solved by con-
necting pin 18 to another ground.
Serial number: 552
1 Printed inBelgium
Solutions
Modification of 3V3 converter
1. An integration capacitor is added across R223, to prevent the voltage spikes to be detected.
2. The 3V3 is lowered by adding a resistor on the output stage of the 3V3 supply.
R235
R
2
1
5
R
2
1
6
R
2
2
3
C223
+3.3V Outpu
t
Image -1
3V3 output stage
C223 : P210178
R235 : P200443
Grounding
Pin 18 of I9 is soldered to the pad of R400.
Mounting the components
PCB view
Image -2
Front view of the PCB
Printed inBelgium 2 Serial number: 552
Image -3
Back view of the PCB
How to mount the capacitor ?
1. Solder the cap
acitor on the existing R223 like shown on the image (image -4)
Image -4
C223 soldered
How to mount the resistor ?
1. Solder the resistor R235 by placing it on the existing R216 like shown on the image (image -5)
Image -5
R235 soldered
Serial number: 552 3 Printed inBelgium
How to fix the IC pin ?
1.Takepin18outofthesocket
2. Use a short wire to solder it to the pad of R400 (image -6)
Image -6
IC9 pin 18 soldering
Printed inBelgium 4 Serial number: 552
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Barco Galaxy WARP Owner's manual

Barco
Brand
Barco
Model
Galaxy WARP
Type
Owner's manual
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