Vcm-x component & systems wiring 120, Warning, Figure 94: eprom chip installation instructions – Orion System VCM-X E-BUS Component User Manual

Page 120

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VCM-X Component & Systems Wiring

120

Miscellaneous Diagrams and Technical Information

Chip Installation Procedures

FILENAME

DATE:

B. CREWS

DESCRIPTION:

PAGE

DRAWN BY:

JOB NAME

4 of 4

Small Flathead
Screwdriver

Chip

Chip

Printed Circuit
Board

Printed Circuit
Board

Printed Circuit
Board

Chip

WARNING!

Direction Of Pull

Notch

Dot

Pin1

Be sure the chip you have selected to replace is a
socketed chip. Not all driver chips on the boards
are field replaceable. Only socketed chips may be
removed and replaced in the field. All other chips
that are not socketed will require sending the board
to the WattMaster factory for repair.

Once you have determined that the

chip needing replacement is indeed a socketed chip,
please proceed in the following manner:

Remove the communications loop connector and
then the 24VAC power connector on the controller
before attempting to change any components.

will occur if components are removed or

installed with power applied.

If you are unsure how to safely remove the chip or
have questions about correct pin placement, please
consult the factory before proceeding.

Use extreme care to avoid inserting the screwdriver
or I.C. Puller under the socket. You must insert the tip
of the screwdriver or ends of the I.C. Puller between
the body of the chip and the chip socket.

Each chip

be installed with Pin 1 in the correct

location. Installing the chip “backwards” will in most
cases destroy the device when power is reapplied.

Pin 1 can be located by looking for the notch in the end
of the chip. Pin 1 on "some" chips is identified with a dot.

Be certain that

pins are lined up in the socket

before pressing the chip in. Failure to properly line
up the pins will result in damage to the chip.
This is a

common error -

Only after confirming that the chip has been correctly
installed with Pin 1 in the proper position and that the
pins are lined up and none are bent or out of the socket,
should communication or power wiring be reconnected
to the board. To prevent possible damage, always
reconnect the power wiring first and then the
communication wiring.

If you try to

remove a chip that is not socketed, it will destroy
the circuit board.

DAMAGE

Damage to the board caused by failure to correctly
remove or install the chip is not covered by the
WattMaster warranty.

MUST

ALL

VERY

BE CAREFUL.

Using I.C. Puller To Remove Socketed Chip

Using Screwdriver To Remove Socketed Chip

End View Of Socketed Chip Assembly

Top View Of Socketed Chip Assembly

I.C. Puller

Chip Socket

Chip Socket

Chip Socket

Gently Rock Chip Side To Side And Then
Lift Straight Up To Remove Chip From
Chip Socket.

Gently Lift The Chip On One End And Rock The Chip
Back And Forth With Screwdriver As Shown.Repeat
This Process On The Other End Of The Chip.
Alternate This Process On Both Ends Of The Chip
Until The Chip Is Free From The Chip Socket.

Pin 1

Dot

Socket

Printed

Circuit

Board

Typical RS-485 Communications

Driver Chip Detail

Product Chip Replacement Information

Orion Components VCM-X

10/09/09

DATE:

S. OLSON

BY:

05/20/15

Figure 94: EPROM Chip Installation Instructions

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