Barco CVM 2037 Instruction Manual page 4

SERVICE SAFETY PRECAUTIONS
WARNING: X-RADIATION
X-RADIATION CAN BE CAUSED IF CRITICAL
COMPONENTS ARE REPLACED BY NON-CONFORM
COMPONENTS. THESE COMPONENTS ARE MARKED IN
THIS SERVICE MANUAL BY AN * .
1. Comply with all caution and safety-related notes on or inside the
instrument cabinet, on the chassis, or on the picture tube.
2. When service is required, maintain correct lead dress and parts
placement. Extra precaution should be taken to assure proper lead
dress in the High Voltage circuit area.
Where a malfunction has occurred, those components or drcuits that
indicate evidence of abnormality should be replaced or corrected.
Always use the manufacturer's safety specified replacement compo-
nents.
3. Do not remove, install or handle the picture tube in any manner
unless shatter-proof goggles are worn. People not so equipped
should be kept away when picture tubes are handled. Keep the
picture tube away from the body while handling.
4. Protective shields are provided on this chassis for the protection of
both the service technician and the costumer.
Protection shields removed for service convenience must be re-
installed correctly and ANY MISSING SHIELD MUST BE RE-
PLACED. DO NOT OPERATE THIS INSTRUMENT WITHOUT THE
PROTECTIVE SHIELDS IN POSITION AND PROPERLY SE-
CURED.
X-RADIATION AND HIGH-VOLTAGE LIMITS
The primary source of X-radiation in solid state display units is the
picture tube. The picture tube is specially constructed to limit X-
radiation emissions. The shields and mounting hardware for picture
tubes have an X-radiation protection function and must be properly in
place.
For continued X-radiation protection, the replacement tube must be the
s ane type as the original, including suffix letter. High voltage is
—
a ntained within specified limits by the use of dose tolerance safety
.e a:ac erponents/adjustments in the power supply drcuit. Refer to
c an X-radiation warning note on the Chassis Schematic and
Labels in the Basic Service Data for specific high-voltage
-
— • z as: cnassis and X-radiation Protection Circuits. If high voltage
: : s
d limits, check each component spedfied in the
_ diagram and take necessary corrective action.
NOTE FOR USERS IN THE UNITED KINGDOM :
IMPORTANT:
-
T e wires of the mains lead are coloured in accordance with the following code:
As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured
markings identifying the terminals in your plug, proceed as follows:
The wire which is coloured Green and Yellow must be connected to the terminal in the plug which
-
is marked by the letter E of by the safety earth symbol =6 or coloured Green and Yellow.
The wire which is coloured Blue must be connected to the terminal which is marked with the letter
N or coloured Black.
The wire which is coloured Brown must be connected to the terminal which is marked with the
eur L or coloured Red.
WARNING : This apparatus must be earthed.
REPLACE WITH CONFORM TYPES ONLY !
Green and Yellow: EARTH
Blue: LIVE
Brown: NEUTRAL
Plug fusing value: 5 A
WARNING: SAFETY
ELECTRIC SHOCK OR FIRE HAZARD CAN BE
CAUSED IF CRITICAL COMPONENTS ARE REPLACED
BY NON-CONFORM COMPONENTS. THESE
COMPONENTS ARE MARKED IN THIS GUIDE BY A ,L SIGN.
5. After any service intervention, the service technician must be sure
that no protective device built into the instrument by the manufacturer
has become defective, or inadvertently defeated during servicing.
Therefore, the following checks are recommended for the continued
protection of the costumer and service technician.
GROUNDING CONTINUITY TEST
- Remove main plugs from wall outlet.
- With an ohm-meter in its lowest resistance range, measure resistance
between the grounding prong of the mains plug and all accessible
conductive parts.
THE METER MUST BE READ ZERO OHM.
- The mains plug still being removed from the wall outlet, switch on the
instument.
- Switch an ohm-meter in its highest resistance range, measure resis-
tance between the grounding prong of the mains plug and the two other
prongs of the mains plug.
BOTH METER READINGS HAVE TO BE MORE THAN 5 MEGOHM
(5 Mohm).
ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED
ABOVE THE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND
CORRECTIVE ACTION MUST BE TAKEN BEFORE RETURNING
THE INSTRUMENT TO THE COSTUMER.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in display units have special
safety-related characteristics. These characteristics are often not evi-
dent from visual inspection nor can the protection afforded by then
necessarily be obtained by using replacement components rated for
higher voltage, wattage, etc. Replacement parts which have these
spedal safety characteristics are identified in this Data and its Supple-
ments and Bulletins. Electrical components having such features are
A
identified by or * on the schematics and on the parts lists in this
Data and its Supplements and Bulletins. The use of a substitute
replacement which does not have the same safety characteristics as
the recommended replacement part shown in the parts lists in this Data
and its radiation.