Morningstar SureSine-300 Setup guide

SureSine-300
Repair Instructions
Synopsis
Due to an issue with manufacturing, some power MOSFETs and/or diodes may be stuck
to the PCB with conformal coating. This prevents a spring from firmly pressing the
components to the heatsink, causing premature component failure. The SureSine must be
disassembled and each of 12 components must be inspected to ensure that they are not
stuck to the PCB. Stuck parts must be broke free of the conformal coating. These
instructions detail the preventative action required to eliminate failure due to this issue.
Tools Required
Flat-head screw driver
#1 Philips screwdriver
#2 Philips screwdriver
Anti-static wrist strap
Contact Information
For questions or concerns please contact:
Morningstar Corporation
1098 Washington Crossing RD
Washington Crossing, PA 18977 USA
Phone: [phone]
Fax: [phone]
Email: [email protected]
WARNING!: USE AN ANTI-STATIC STRAP WHEN HANDLING THE SURESINE PCB. STATIC CAN
DAMAGE SENSITIVE ELECTRONIC COMPONENTS.

UNSCREW
DESAPARAFUSE
DESTORNILLE
(#2 Philips)
Remove the four screws with a #2
Philips screwdriver as shown.
Remove the plastic lid.

UNSCREW
DESAPARAFUSE
DESTORNILLE
(#2 Philips)
UNSCREW
DESAPARAFUSE
DESTORNILLE
(#1 Philips)
Remove the four spring screws with
a #2 Philips screwdriver as shown.
Also remove the grounding screw
with a #1 Philips screwdriver as
shown.

GENTLE
SUAVE
APACIBLE
INSPECT
INSPECIONE
INSPECCIONESlightly wiggle each of the 12
components shown at right with
your finger. Each component
should move freely.
Gently separate the circuit board assembly
from the aluminum body/heatsink. Lift the
circuit board assembly up as shown at left.

STUCK!
¡COLOU!
¡ATASCADO!
FLAT-HEAD
SCREWDRIVER
If one of the 12 components is stuck
(glued down by conformal coating), it
must be pried loose. Place the tip of
a flat blade screwdriver between the
metal tab of the component and the
circuit board as shown below.
Twist the screwdriver gently but
firmly to free the component from the
conformal coating.
Repeat this procedure for each stuck
component.

CLEAN
LIMPE
LIMPIE
Inspect all twelve (12) PCB holes
shown at left. Remove any
conformal coating that may be
clogging the holes.

CLEAN
LIMPE
LIMPIE Inspect all three (3) thermal pads as
shown at left. Remove any dirt,
debris, or metal shards before re-
assembly.

SCREW
PARAFUSO
TORNILLO
(#2 Philips)
SCREW
PARAFUSO
TORNILLO
(#1 Philips)
Re-assemble the springs with four (4) screws and a #2
Philips screwdriver as shown. Insert and secure the
ground screw with a #1 Philips screwdriver. If any screws
are damaged, use replacement screws as needed.

SCREW
PARAFUSO
TORNILLO
(#2 Philips)
Replace and secure the lid with four
screws with a #2 Philips screwdriver
as shown.
Record the SureSine serial number
for reference.