Servicing Notices On Checking - THOMSON CR14300 Basic Service Data

SERVICING NOTICES ON CHECKING

1. Keep the notices
As for the places which need special attentions, they are indicated with the labels or seals on
the cabinet, chassis and parts. Make sure to keep the indications and notice in the operation
manual.
2. Avoid an electric shock
There is a high voltage part inside. Avoid an electric shock while the electric current is
flowing.
3. Use the designated parts
The parts in this equipment have the specific characters of incombustibility and withstand
voltage for safety. Therefore, the part which is replaced should be used the part which has
same character. Specially as to the important parts for safety which is indicated in the circuit
diagram or the table of parts as a mark, the designated parts must be used.
4. Put parts and wires in the original position after assembling or wiring
There are parts which use the insulation material such as a tube or tape for safety, or which
are assembled in the condition that these do not contact with the printed board. The inside
wiring is designed not to get closer to the pyrogenic parts and high voltage parts. Therefore,
put these parts in the original positions.
5. Take care to deal with the cathode-ray tube
In the condition that an explosion-proof cathode-ray tube is set 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.
6. Avoid an X-Ray
Safety is secured against an X-ray by considering about the cathode-ray tube and the high
voltage peripheral circuit, etc. Therefore, when repairing the high voltage peripheral circuit,
use the designated parts and make sure not modify the circuit. Repairing except indicates
causes rising of high voltage, and it emits an X-ray from the cathode-ray tube.
7. Perform a safety check after servicing
Confirm that the screws, parts and wiring which were removed in order to service are put in
the original positions, or whether there are the portions which are deteriorated around the
service places or not. Check the insulation between the antenna terminal or external metal
and the AC cord plug blades. And be sure the safety of that.
(Insulation Check procedure)
1. Unplug the plug from the AC outlet
2. Remove the antenna terminal on TV and turn on the TV
3. Insulation resistance between the cord plug terminals and the external exposure metal (note
2) should be more than 1M ohm by using the 500V insulation resistance meter (note 1)
4. If the insulation resistance is less than 1M ohm, the inspection repair should be required.
Note 1: If you have not the 500V insulation resistance meter, use a Tester.
Note 2: External exposure metal: antenna terminal, A/V terminal.
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