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SERVICE MANUAL
COLOR TELEVISION/
VIDEO CASSETTE RECORDER/
DVD VIDEO PLAYER
VTW2187
SERVICING NOTICES ON CHECKING
1. KEEP THE NOTICES 6. AVOID AN X-RAY
As for the places which need special attentions, Safety is secured against an X-ray by consider-
they are indicated with the labels or seals on the ing about the cathode-ray tube and the high
cabinet, chassis and parts. Make sure to keep the voltage peripheral circuit, etc.
indications and notices in the operation manual. Therefore, when repairing the high voltage pe-
ripheral circuit, use the designated parts and
2. AVOID AN ELECTRIC SHOCK
make sure not modify the circuit.
There is a high voltage part inside. Avoid an Repairing except indicates causes rising of high
electric shock while the electric current is voltage, and it emits an X-ray from the cathode-
flowing. ray tube.
3. USE THE DESIGNATED PARTS 7. PERFORM A SAFETY CHECK AFTER
The parts in this equipment have the specific SERVICING
characters of incombustibility and withstand
Confirm that the screws, parts and wiring which
voltage for safety. Therefore, the part which is
were removed in order to service are put in the
replaced should be used the part which has
original positions, or whether there are the
the same character.
portions which are deteriorated around the
Especially as to the important parts for safety
serviced places serviced or not. Check the
which is indicated in the circuit diagram or the
insulation between the antenna terminal or
table of parts as a mark, the designated
external metal and the AC cord plug blades.
parts must be used.
And be sure the safety of that.
4. PUT PARTS AND WIRES IN THE (INSULATION CHECK PROCEDURE)
ORIGINAL POSITION AFTER
1. Unplug the plug from the AC outlet.
ASSEMBLING OR WIRING 2. Remove the antenna terminal on TV and turn
There are parts which use the insulation on the TV.
material such as a tube or tape for safety, or 3. Insulation resistance between the cord plug
which are assembled in the condition that terminals and the eternal exposure metal
these do not contact with the printed board. [Note 2] should be more than 1M ohm by
The inside wiring is designed not to get closer using the 500V insulation resistance meter
to the pyrogenic parts and high voltage parts. [Note 1].
Therefore, put these parts in the original 4. If the insulation resistance is less than 1M
positions. ohm, the inspection repair should be
required.
5. TAKE CARE TO DEAL WITH THE
CATHODE-RAY TUBE [Note 1]
If you have not the 500V insulation
In the condition that an explosion-proof cathode- resistance meter, use a Tester.
ray tube is set in this equipment, safety is
secured against implosion. However, when [Note 2]
removing it or serving from backward, it is External exposure metal: Antenna terminal
dangerous to give a shock. Take enough care to Earphone jack
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.
A1-1
WHEN REPLACING DVD DECK
[ Removing the DVD Deck ]
Before removing Pick Up PCB and DVD PCB connector, short circuit the position shown in Fig. 1 using
a soldering iron. If you remove the DVD Deck with no soldering, the Laser may be damaged.
[ Installing the DVD Deck ]
Remove all the soldering on the short circuit position after the connection of Pick Up PCB and DVD
PCB connector.
NOTE