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DTQ-20V4FC 데이터시트, 핀배열, 회로
www.DataSheet4U.com
S/M No. : CN001A-020
Service Manual
Color Television
CHASSIS : CN-001A
Model :
DTQ-14V1FC/20V1FC
DTQ-14V5FC/20V4FC
DTQ-14V1FS/20V1FS
DTQ-14V5FS/20V4FS
DTQ-14V3FS/20V3FS
DTQ-14U1FS/20U1FS
DTQ-14V1FSP/20V1FSP
DTQ-14V5FSP/20V4FSP
DTQ-14U1FSP/20U1FSP
U.S.A
Canada
Middle America
(AC 110V)
Mexico,Chile,
Peru (AC 220V)
DTQ-14V1FC
DTQ-14V3FC
DTQ-20V4FC
MUTE
POWER
CH
VOL VOL
CH
DISPLAY INPUT
VIDEO
123
456
789
SLEEP
0 PREVIOUS
DTQ-14V5FC
DTQ-14U1FS
R-38T01
 Caution
: In this Manual, some parts can be changed for improving, their
performance without notice in the parts list. So, if you need the
latest parts information,please refer to PPL(Parts Price List) in
Service Information Center (http://svc.dwe.co.kr).
DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr
Aug. 1999




DTQ-20V4FC pdf, 반도체, 판매, 대치품
PRODUCT SAFETY SERVICING GUIDELINES FOR COLOR TELEVISION RECEIVERS
CAUTION : Do not attempt to modify this product in any way. Unau-
thorized modifications will not only void the warranty, but may lead to
your being liable for any resulting property damage or user injury.
Service work should be performed only after you are thoroughly
familiar with all of the following safety checks and servicing guide-
lines. To do otherwise, increases the risk of potential hazards and
injury to the user.
SAFETY CHECKS
After the original service problem has been corrected, a check should
be made of the following:
SUBJECT : FIRE & SHOCK HAZARD
1. Be sure that all components are positioned in such a way as to
avoid possibility of adjacent component shorts. This is especially
important on those chassis which are transported to and from the
repair shop.
2. Never release a repair unless all protective devices such as insula-
tors, barriers, covers, shields, strain reliefs, and other hardware
have been reinstalled per original design.
3. Soldering must be inspected to discover possible cold solder joints,
frayed leads, damaged insulation (including A.C. cord), solder
splashes or sharp solder points. Be certain to remove all loose for-
eign particals.
4. Check for physical evidence of damage or deterioration to parts
and components, and replace if necessary follow original layout,
lead length and dress.
5. No leads or components should touch a receiving tube or a resistor
rated at 1 watt or more. Lead tension around protruding metal sur-
faces must be avoided.
6. All critical components such as fuses, flameproof resistors, capaci-
tors, etc. must be replaced with exact factory types. Do not use
replacement components other than those specified or make
unrecommended circuit modifications.
7. After re-assembly of the set always perform an A.C. leakage test
on all exposed metallic parts of the cabinet, (the channel selector
knob, antenna terminals, handle and screws) to be sure the set is
www.DataSslihnaeefeeitst4ooUlao.ctpiooemnrattreanwsiftohromuet rdadnugrienrg
of electrical shock. Do
this test. Use an A.C.
not use a
voltmeter,
having 5000 ohms per volt or more sensitivity, in the following
manner : connect a 1500 ohm 10 watt resistor, paralleled by a 15
mfd. 150V A.C. type capacitor between a known good earth
ground (9water pipe, conduit, etc.) and the exposed metallic parts,
one at a time. Measure the A.C. voltage across the combination of
1500 ohm resistor and 0.15 MFD capacitor. Reverse the A.C. plug
and repeat A.C. voltage measurements for each exposed metallic
part. Voltage measured must not exceed 0.75 volts R.M.S. This
corresponds to 0.5 milliamp A.C. Any value exceeding this limit
constitutes a potential shock hazard and must be corrected imme-
diately.
A.C. VOLTMETER
GRAPHIC SYMBOLS :
The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to alert
the service personnel to the presence of uninsu-
lated “dangerous voltage”that may be of suffi-
cienty magnitude to constitute a risk of electric
shock.
The exclamation point within an equilateral tri-
angle is intended to alert the service personnel
to the presence of important safety information
in service literature.
Fuse symbol is printed on pcb adjacent to the
fuse, with “RISK OF FIRE REPLACE FUSE AS
MARKED”. The symbol is explained in the ser-
vice manual with the following wording or equiv-
alent.
“CAUTION : FOR CONTINUED PROTECTION AGAINST FIRE
HAZARD, REPLACE ONLY WITH SAME TYPE (4A, 125V)” and
ATTENTION: AFIN D’ASSU UNE PROTECTION PERMANENTE
CONTRE LES RISQUES D’INCENDIE, REMPLACER UNIQUE-
MENT PAR UN FUSIBLE DE MEME TYPE ET DE ”4A, 125V”.
SUBJECT : X-RADIATION
1. Be sure procedures and instructions to all service personnel cover
the subject of X-rays in current T.V. receivers is the picture tube.
However, this tube does not emit X-rays when the high voltage is
at the factory specified level. The proper value is given in the appli-
cable schematic. Operation at higher voltages may cause a failure
of the picture tube or high voltage supply and, under certain cir-
cumstances, may produce radiation in excess of desirable levels.
2. Only factory specified C.R.T. anode connectors must be used.
Degaussing shields also serve as X-ray shield in color sets.
Always re-install them.
3. It is essential that the serviceman has available an accurate and
reliable high voltage meter. The calibration of the meter should be
checked perio - dically against a reference standard. Such as the
one available at your distributor.
4. When the high voltage circuitry is operating properly there is no
possibility of an X-radiation problem. Every time a color chassis is
serviced, the brightness should be run up and down while monitor-
ing the high voltage with a meter to be certain that the high voltage
does not exceed the specified value and that it is regulating cor-
rectly. We suggest that you and your service organization review
test procedures so that voltage regulation is always checked as a
standard servicing procedure. And that the high voltage reading be
recorded on each customer’s invoice.
5. When troubleshooting and making test measurements in a receiver
with a problem of excessive high voltage, avoid being unnecessarily
close to the picture tub eand the high voltage compartment.
Do not operate the chassis longer than is necessary to locate the
cause of excessive voltage.
6. Refer to HV, B+and Shutdown adjustment procedures described in
the appropriate schematic and diagrams(where used).
Good earth ground,
such as the water
pipe, conduit, etc.
0.15 uF
1500 OHM
10WATT
Place this probe
on each exposed
metal part.
3

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관련 데이터시트

부품번호상세설명 및 기능제조사
DTQ-20V4FC

Service Manual

Daewoo
Daewoo
DTQ-20V4FCN

Color Television Service Manual

DAEWOO ELECTRONICS
DAEWOO ELECTRONICS

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