AV-20F704
SAFETY PRECAUTIONS
SERVICING NOTICES ON CHECKING
1. KEEP THE NOTICES6. AVOID AN X-RAY
As for the places which need special attentions, they areSafety is secured against an X-ray by considering about the
indicated with the labels or seals on the cabinet, chassis andcathode-ray tube and the high voltage peripheral circuit, etc.
parts. Make sure to keep the indications and notices in theTherefore, when repairing the high voltage peripheral circuit,
operation manual.use the designated parts and make sure not modify the
circuit.
2. AVOID AN ELECTRIC SHOCKRepairing except indicates causes rising of high voltage, and
There is a high voltage part inside. Avoid an electric shockit emits an X-ray from the cathoderay tube.
while the electric current is flowing.
7. PERFORM A SAFETY CHECK AFTER SERVICING
3. USE THE DESIGNATED PARTSConfirm that the screws, parts and wiring which were
The parts in this equipment have the specific characters ofremoved in order to service are put in the original positions, or
incombustibility and withstand voltage for safety. Therefore,whether there are the portions which are deteriorated around
the part which is replaced should be used the part which hasthe serviced places serviced or not. Check the insulation
the same character.between the antenna terminal or external metal and the AC
Especially as to the important parts for safety which iscord plug blades. And be sure the safety of that.
indicated in the circuit diagram or the table of parts as a !(INSULATION CHECK PROCEDURE)
mark, the designated parts must be used.1. Unplug the plug from the AC outlet.
2. Remove the antenna terminal on TV and turn on the TV.
4. PUT PARTS AND WIRES IN THE ORIGINAL3. Insulation resistance between the cord plug terminals and
POSITION AFTER ASSEMBLING OR WIRINGthe eternal exposure metal [Note 2] should be more than
There are parts which use the insulation material such as a
1M ohm by using the 500V insulation resistance meter
tube or tape for safety, or which are assembled in the condition[Note 1].
that these do not contact with the printed board. The inside4. If the insulation resistance is less than 1M ohm, the
wiring is designed not to get closer to the pyrogenic parts and
high voltage parts.inspection repair should be required.
[Note 1]
Therefore, put these parts in the original positions.If you have not the 500V insulation resistance meter, use a
Tester.
5. TAKE CARE TO DEAL WITH THE
[Note 2]
CATHODE-RAY TUBEExternal exposure metal:Antenna terminal
In the condition that an explosion-proof cathoderay tube is setEarphone jack
in this equipment, safety is secured against implosion.
However, when removing it or serving from backward, it is
dangerous to give a shock. Take enough care to deal with it.
HOW TO ORDER PARTS
Please include the following informations when you order parts. (Particularly the VERSION LETTER.)
1. MODEL NUMBER and VERSION LETTER
The MODEL NUMBER can be found on the back of each product and the VERSION LETTER can be found at the end of the SERIAL
NUMBER.
2. PART NO. and DESCRIPTION
You can find it in your SERVICE MANUAL.
IMPORTANT
Inferior silicon grease can damage IC's and transistors.
When replacing an IC's or transistors, use only specified silicon grease (YG6260M).
Remove all old silicon before applying new silicon.
No. 521313 |
ACEC
