TV-A1419 KE
SERVICE MANUAL
COLOR TELEVISION
•This Service Manual contains the additional information “NOTICES BEFORE REPAIRING”, “DISASSEMBLY INSTRUCTIONS” and “ADJUSTMENT” for the model TV-A1419 (KE).
If requiring the other information, see Service Manual of TV-A1419 (KE), (S/M Code No. 09-99B-420-9R1).
S/M Code No. 09-007-420-9S1
SUPPLEMENTDATA
NOTICES BEFORE REPAIRING
To make the best use of this equipment, make sure to obey the following items when repairing (or mending).
1.Do not damage or melt the tunicate of the leading wire on the AC1 side, including the power supply cord.
2.Do not soil or stain the letters on the spec. inscription plates, notice labels, fuse labels, etc.
3.When repairing the part extracted from the conducted side of the board pattern, fix it firmly with applying bond to the pattern and the part.
4.Restore the following items after repairing.
1)Conditions of soldering of the wires (especially, the distance on the AC1 side).
2)Conditions of wiring, bundling of wires, etc.
3)Types of the wries.
4)Attachment conditions of all types of the insulation.
5.After repairing, always measure the insulation resistance and perform the voltage-withstand test
(See Fig-1).
1)The insulation resistance must be 1 MΩ when applying 500V per second.
2)In the voltage withstand test, apply 1 kV for 1 min and check that the GO lamp lights.
*Breaking current set to 10 mA.
*Connect the safety checker as shown in Fig-1, then measure the resistance and perform the test.
*Do not touch the equipment during testing.
*For details of the safety checker, refer to the supplied Operation manual.
Insulation resistance: 1 MΩ (500 V/s)
Voltage-withstand: 1 kV for 1 min
Safety checker (Model 7110, etc.)
Earth cable |
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AC cable |
Connect the earth cable |
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to the outside metal part |
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terminal. |
Fig-1
When servicing and checking on the TV, note the followings.
1.Keep the notices.
As for the places which need special attentions, they are indicated with labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notices 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 characteristics of incombustibility and withstand voltage for safety.
Therefore, use a part which has the same character as the replaced part. Especially as to the important parts for safety which is indicated in the circuit diagram or the table of parts with 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 so that these parts do not make contact with the printed
board. The inside wiring is designed not to get close to the pyrogenic parts and high voltage parts. Therefore, put these parts in the original positions.
5.Take care of the cathode-ray tube.
By setting an explosion-proof cathode-ray tube in this equipment, safety is secured against implosion. However, when removing it or servicing from the back, it gives out shock that is dangerous. Take enough care to deal with it.
6.Avoid an X-ray.
Safety is secured against an X-ray by giving considerations to the cathode-ray tube and the high voltage peripheral circuit, etc. Therefore, when repairing the high voltage peripheral circuit, use the designated parts and do not change the circuit. Repairing, except indicates, causes rising of high voltage, and the cathode-ray tube emits an X-ray.
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 deteriorated portions around the places serviced.
! Safety Components Symbol
This symbol is given to important parts which serve to maintain the safety of the product, and which are made to confirm to special Safety Specifications.
Therefore, when replacing a component with this symbol make absolutely sure that you use a designated part.
– 2 –
DISASSEMBLY INSTRUCTIONS
1. REAR CABINET REMOVAL
2.HIGH-VOLTAGE CAP (ANODE CAP) REMOVAL 2-1. Cautions before Removing
Discharge the anode voltage
(1)The anode voltage is not discharged completely from the CRT of this unit even after the power is turned off. Be sure to discharge the residual anode voltage before removing the anode cap.
Do not use pliers
(2)Do not use pliers, etc. to remove the anode cap. If you used pliers and bent the hook to remove the cap, the spring characteristics of the hook could be lost, and when reinstalled, the cap would come off from the CRT anode button easily, causing an accident.
Do not turn the anode cap
(3)If the anode cap is turned in the direction of its circumference, the hook is likely to come off.
2-2. Anode Cap Removal
Discharge the anode voltage. (See Figure 2-1)
(1)Connect a flat-bladed screwdriver to the CRT GND via an alligator clip.
(2)Use a tester to check the end of the screwdriver and ground of the TV for continuity.
(3)Touch the hook with the end of the screwdriver. Caution : Be careful not to damage the anode cap.
(4)Turn over the anode cap.
Caution : Be careful not to damage the anode cap.
Figure 1-1
Anode cap
CRT GND
Grip |
Hook |
CRT |
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|
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CRT GND |
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Figure 2-1
Figure 2-2
– 3 –
(5)Push the anode cap with your thumb in the direction of arrow 1 as shown in the figure, then lift the cap in the direction of arrow 2 to release the hook on one side.
(See Figure 2-3)
(6)Turn over the anode cap on the side where the hook was released and pull out the cap in the direction opposite to that on which the cap was pushed. (See Figure 2-4)
Caution : Do not pull out the anode cap straight up.
:Do not pull the cap forcibly. After removing the cap, check that the hook is not deformed.
3. ANODE CAP REINSTALLTION
Observe the cautions carefully so that no accident occurs due to a defect in installing the anode cap and so it does not come off.
3-1. Caution before Reinstalling
Never turn the anode cap after installing it
Never re-use the hook when it has been deformed
(1)If the anode cap is turned after it is installed, it may come off. Therefore, arrange the high-voltage cable before attaching the anode cap. (See Figure 3-1)
(2)If you have attached the anode cap before arranging the high-voltage cable, arrange the cable carefully so the cap does not turn.
3-2. Anode cap reinstallation
(1)Use a clean cloth moistened slightly with alcohol to clean the installation section. (See Figure 3-2)
Caution : Check that the installation section is free from dust, foreign matter, etc.
(2)Coat the anode cap installation circumference with an appropriate amount of the specified silicone grease (KS650N).
Caution : Be careful that silicone grease does not enter the anode button.
Anode cap
CRT |
CRT |
Hook |
Hook
Figure 2-3
Anode cap
CRT
Anode button
Hook
Figure 2-4
Anode cap
Left |
Right |
Figure 3-1
Anode button
Installation section
Figure 3-2
– 4 –
(3)Eliminate twisting, etc. of the high-voltage cable and arrange it so that no twisting occurs. (See Figure 3-3) Caution : If the cable is not arranged correctly, the anode
cap could turn and cause an installation defect.
(4)Turn over the rubber cap symmetrically on the left and right. (See Figure 3-4)
Caution : Take great care not to damage the anode cap.
(5)Fit your forefinger over the projection at the center of the cap and hold the cap between your thumb and middle finger. (See Figure 3-5)
High-voltage cable |
Anode cap |
Figure 3-3
Figure 3-4
Figure 3-5
– 5 –
(6)Apply the hook on one side to the anode button as shown on the figure. (See Figure 3-6)
Caution : Check that the hook is held securely.
(7)Apply the hook on the other side to the anode button as
shown in Figure 3-7. |
Hook |
Anode button
Hook
Anode button
30°
Figure 3-6
Anode button
Hook
Figure 3-7
(8)Pull the anode cap slightly with the rubber cap turned over and visually check that the hook is engaged securely.
(9)Release your hand from the rubber cap of the anode cap. Caution : Cover the anode cap so that it does not lift.
(10) Hold the skirt of the andoe cap slightly to improve the |
Anode button |
close contact between the cap and CRT. |
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(11) Check that the anode cap is in close contact with the CRT. |
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(See Figure 3-8) |
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Skirt
Figure 3-8
– 6 –
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