Daewoo DTU-14, Service Manual

Page: 4 / 42

3
2. Safety Instruction
WARNING
: Before servicing this chassis, read the “ X-RAY RADIATION precaution “, “ safety precaution “ and “
product safety notice “ below.
1. Excessive high voltage can prodece potentially haz-
ardous X-RAY RADIATION. To avoid such hazards,
the high voltage must not exceed the specified limit.
The nominal value of the high voltage of this receiver is
23-24kv(14”), 26-27kv(20”, 21”) at max beam current.
The high voltage must not, under any circumstances,
exceed 27.5kv (14”, 20”), 29.0kv(21”).
Each time a receiver require servicing, the high
voltage should be checked. It is recommended the
reading of high voltage recorded as a part of the ser-
vice records. it is important to use an accurate and reli-
able high voltage meter.
2. The only source of X-RAY Radiation in this TV receiver
is the picture tube. For continuous RADIATION protec-
tion, the replacement tube as specified in the part list.
X-RAY RADIATION PRECAUTION
1. Potentials of high voltage are present when this
receiver is operating. Operation of the receiver outside
the cabinet or with the back cover removed involves a
shock hazard from the receiver.
1) Servicing should not be attempted by anyone who is
not thoroughly familiar with the precautions neces-
sary when working on high-voltage equipment.
2) Always discharge the picture tube to avoid the shock
hazard before removing the anode cap.
3) Dischange the high potential of the picture tube
before handling the tube. The picture tube is highly
evacuated and if broken, glass fragments will be
violently expelled.
2. If any Fuse in this TV receiver is blown, replace it with
the FUSE specified in the Replacement Parts List.
3. When replacing a high wattage resistor ( oxide meta
film resistor ) in circuit board, keep the resistor 10mm
away from circuit board.
4. Keep wires away from high voltage or high tempera-
ture components.
5. This receiver must operate under AC260 volts, 50Hz /
60Hz. ( AC 100 ~ 250 volts, 50 / 60 Hz ) NEVER con-
nect to DC supply or any other power or frequency.
SAFETY PRECAUTION
Many electrical and mechanical parts in this chassis
have special safety-related characteristics.
These characteristics are often passed unnoticed by
a visual inspection and the X-RAY RADIATION pro- tection afforded by them cannot necessarily be
obtained by using replacement components reted for
higher voltage, wattage, etc.
PRODUCT SAFETY NOTICE