Safety Precautions; Service Warning - Neotec NT-3500 Service Manual

CAUTION: Before servicing this chassis, it is important that the service technician should read
the "Safety Precaution" and "Product Safety Notice" in this Service Manual.
1.
SAFETY PRECAUTIONS
NOTICE: Comply with all cautions and safety related notes located on or inside the cabinet and
on the chassis or picture tube. The following precautions should be observed:
1. Do not install, remove, or handle the picture tube in any manner unless one wears
shatterproof goggles People not so equipped should be kept away while picture tube is handled
Keep picture tube away from the body while handling.
2. When replacing a chassis in the monitor, all the protective devices, such as, barriers,
non-metallic knobs, adjustment and compartment shields, and isolation resistor-capacitor, must
be put back in place.
3. When service is required, observe the original lead dress. Extra precaution should be
taken to assure correct lead dress in the high voltage circuitry area.
4. Always use the manufacturer's replacement components. Especially critical
components as indicated on the circuit diagram should not be replaced by other manufacturr's.
Furthermore where a short circuit has occurred, replaced those components that indicate evidence
of overheating.
5. Before returning a serviced monitor to the customer, the service technician must
thoroughly test the unit to be certain that it is completely safe to operate without danger of
electrical shock, and be sure that no protective device built into the monitor by the manufacturer
has become defective, or madvertenly defeated during servicing Therefore, the following checks
should be performed for continued protection of the customer and service technician.
ifiGH VOLTAGE
This monitor is provided with a high voltage hold down circuit for clearly indicating that voltage
has increased in excess of a predertermined value. Comply with all notes described in this
Service Manual regarding this hold down circuit when servicing, so that this hold down circuit
may function correctly.
SERVICE WARNING
With minimum Brightness and Contrast the operating high voltage in this display is lower than
30KV.
If any component having influence on the high voltage is replaced, confirm that the high voltage
with minimum Brightness and Contrast is lower than 30KV. To measure high voltage use a high