Daewoo DTC-25G1TM, Service Manual

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SAFETY INSTRUCTIONS
B E FO R E S E R VIC IN G TH IS C H A SS IS , R E A D TH E “X-R AY R A D IATIO N P R E C A U TIO N ”,
“S AFE TY P R E C A U TIO N ” A N D “P R O D U C T S AFE TY N O TIC E ” B ELO W.
NOTE
1. Excessive high voltage can produce potentially haz-
ardous X -R AY R A D IATIO N .To avoid such hazards,
the high voltage m ust not exceed the specified lim it.
The nominal value of the high voltage of this receiver is
26.5kv(25”), 29.5kv(29”) at max beam current.
The high voltage must not, under any circumstances,
exceed 29.0kv (25”), 31.5kv(29”).
E ach tim e a receiver requires servicing, the high
voltage should be checked. It is recom m ended the
reading of the high voltage recorded as a part of
the service records. it is im portant to use an accu-
rate and reliable high voltage m eter.
2. The only source of X -R AY R adiation in this T V
receiver is the picture tube.
For continuous R A D IAT IO N protection, the
replacem ent tube m ust be exactly the sam e type
tube as specified in the parts list.
1. P otentials of high voltage are present w hen this receiver
is operating. O peration of the receiver outside the cabi-
net or w ith the back cover rem oved involves a shock
hazard from the receiver.
1) S ervicing should not be attem pted by anyone w ho is
not thoroughly fam iliar w ith the precautions necessary
w hen w orking on highvoltage equipm ent.
2) A lw ays discharge the picture tube to avoid the shock
hazard before rem oving the anode cap.
3) D ischarge the high potential of the picture tube before
handling the tube. T he picture tube is highly evac
uated and if broken, glass fragm ents w ill be violently
expelled.
2. If any F use in this T V receiver is blow n, replace it w ith
the F U S E specified in the R eplacem ent P arts List.
3. W hen replacing a high w attage resistor(oxide m etal film
resistor) in circuit board, keep the resistor 10m m aw ay
from circuit board.
4. K eep w ires aw ay from high voltage or high tem perature
com ponents.
5. T his receiver m ust operate betw een A C 110~250volts,
50H z/60H z. N E V E R connect to D C supply or any other
pow er or frequency.
M any electrical and m echanical parts in this
chassis have special safety-related characteristics.
T hese characteristics are often passed unnoticed by
a visual inspection and the X -R AY R A D IAT IO N
protection afforded by them cannot necessarily be
obtained by using replacem ent com ponents rated for
higher voltage, w attage, etc.
R eplacem ent parts w hich have these special safety
characteristics are identified in this m anual and its supplem ents, electrical com ponents having such fea-
tures are identified by designated sym bol on the parts
list. B efore replacing any of these com ponents, read
the parts list in this m anual carefully.
T he use of substitute replacem ent parts w hich do not
have the sam e safety characteristics as specified in
the parts list m ay created X -R AY R adiation.
X-RAY RADIATION PRECAUTION
SAFETY PRECAUTION
PRODUCT SAFETY NOTICE