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This monitor has been designed and manufactured to deliver high performance video. For continued peak
performance use and safe operation, it is recommended to use only high quality Happ Controls replacement parts
or their exact specified equivalent when servicing.
SAFETY PRECAUTIONS AND WARNINGS
Service Warning
The display contains HIGH VOLTAGE capable of
delivering LETHAL levels of energy. Service should
only be attempted by trained personnel familiar with
the potential dangers inherent with high voltage
equipment.
Safety Related Component Warning
Certain components used in Happ Controls color
monitors are critical for safe operation of the display.
These part numbers are marked by (
) on the
schematic diagram. It is essential that these safety
critical components be replaced only with exact
manufacturer specified components to prevent the
possibility of excessive X-radiation emission, electrical
shock, fire or premature component failure. Modifying
the original design without written approval from Happ
Controls is expressly forbidden, will void the original
parts and labor warranty, and may result in creating a
hazardous situation.
X-Radiation Warning
COMPONENTS WHICH MAY AFFECT POTENTIAL
EXCESS EMMISSION OF X-RADIATION IN THE
HORIZONTAL DEFLECTION AND HIGH VOLTAGE
CIRCUITS(INCLUDING THE PICTURE TUBE) ARE
INDICATED ON THE SCHEMATIC DIAGRAM BY A(
★
).
USE ONLY TYPE AND RATING OF REPLACEMENT
COMPONENT AS SHOWN IN THE PARTS LIST.
1. The only potential source of X-radiation emission
is the picture tube. When the high voltage and
horizontal deflection circuits are operating correctly
there is no possibility of excess X- radiation
emission. NEVER attempt to modify these circuits.
2. Periodically check the high voltage with a reliably
calibrated meter for values not in excess of
manufacture recommendations. See High Voltage
Shut-down Circuit, page 4 for further details.
CRT Warning
All picture tubes used in Happ Controls monitors are
quipped with an integral implosion protection system.
The picture tube is, however, a highly evacuated
component which outside surfaces are subject to
strong external forces. Care must be exercised so as
not to bump or scratch the tube during installation or
servicing as this may cause the tube to implode,
resulting in possible personal injury and property
damage. Shatter-proof goggles must be worn by
individuals while handling the CRT or installing the
display in the cabinet. Do not handle the CRT by neck.
1. Always ensure the high voltage at the anode cap
is fully discharged prior to handling or service.
2. Replace picture tube only with same type and
number.
Product Safety and Service Guidelines
1. Service should be performed only after reading
all of the warnings and precautions in the manual
and as labeled on the CRT and chassis.
2. Where a short circuit has occurred, replace all
components that indicate evidence of overheating.
Also check for evidence of overheating or poor
connection on all plastic connectors.
3. Inspect wiring for frayed leads and damaged
insulation. When service is required, observe
original lead dress, assume lead dress is followed
as from the factory, especially in the high voltage
circuitry area.
4. Do not expose this display to rain or place in areas
where the potential for exposure tomoisture is high.
Additionally, do not mount the removed VR PCB if
so equipped outside the cabinet or in areas where
there is a possibility of exposure to moisture.
5. All protective devices must be reinstalled per
original design.