Chapter
4
Module
Removal
and
Renlacement
SCHILLER
AT-I 3-Chnnel
ECG
Unit
SERVICE
HANDBOOK
Issue
3
September
I999
Warnings
and
Cautions
BEFORECOMMENCINGANYREMOVAL.
OR REPLACE"TPR0CEDURES
ENSURE
THAT THE
MAINS
POWER SUPPLY
IS
SWITCHED
OFF
AND THAT THE
MAINS
CABLE
IS
REMOVED.
CERTAIN CHECKS
AND
ADJUSTMEjS
CAN ONLY BE CARRIED
OUT
WITH
THE
TOP
ASSEMBLY
REMOVED
AND
WJTH
MAINS
CONNECTED.
WHEW
CARRYING
OUT
THESE PROCEDURES BEWARE THAT POTENTIALLY
LETHAL
VOLTAGES
ARE
PRESENT.
CAUTIONS
THE AT-
1
CONTAINS STATIC
SENSITIVE
CMOS
COMPONENTS;
OBSERVE
ANTISTATIC PRECAUTIONS:
0
WHEN
CARRYING
OUT
ANY
MAINTENANCE PROCEDURES ALWAYS PLACE
THE
UNlT
ON
AN
EARTHED A"ISTATIC MAT.
0
PERSONNEL MUST BE EARTHED
WHEN
HANDLING
ANY
BOARDS
OR
COMPONENTS
0
ALWAYS USE
AN
ANTISTATIC BAG
WHEN
TRANSPORTING BOARDS
OR
COMPONENTS
THE
UNlT
IS
SUSCEPTIBLE TO ABRASION DAMAGE. TO
PREVENT
SCRATCHING.
OUT
MVIAINTENt-WCE PROCEDURES.
TAKE
CARE
NOT
TO PLACE hNY
STRAIN
ON THE CONNECTING RIBBON CABLE
REMOVING THE TOP ASSEMBLY.
ENSURE
THAT THE CABLE ASSEMBLY
ISNOTCIUMPED
ORTWISTED
ANDTHATTHETOP hSSEMBLY ISNOTPLACEDON
THE CABLE ASSEMBLY.
CARE MUST BE TAKEN
WHEX
REMOVING
.W
REPLACING CONNECTORS.
ALWAYS
PLACETHE~ONASOFT,~ON-ABRASIVECLOTHWHENC.RRMNG
NEVER USE FORCE.
INEVER
STRAIN
THE CABLE ASSEZUIBLIES.
THE PROCEDURAL
STEPS
GIVEN
FOR
EACH MODULE MUST
BE
FOLLOWED
LN
THE
ORDER
GTVM.
I
Page
4.4
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