Aiwa TV-AN1410 NH Service Manual

TV-AN1410

NH

SERVICE MANUAL

COLOR TELEVISION

• This Service Manual contains the additional information “NOTICES BEFORE REPAIRING”,
“DISASSEMBLY INSTRUCTIONS” and “ADJUSTMENT” for the model TV-AN1410 (NH).
If requiring the other information, see Service Manual of TV-AN1410 (NH),
(S/M Code No. 09-99B-417-4R1).

S/M Code No. 09-004-417-4S1

SUPPLEMENT

DATA

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 minute and
check that the GO lamp lights.

Insulation resistance: 1 MΩ (500 V/s)
Voltage-withstand: 1 kV for 1 minute

Safety checker (Model 7110, etc.)

Earth cable

AC cable

Connect the earth cable
to the outside metal part
terminal.

* 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.

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.

Fig-1

– 2 –

DISASSEMBLY INSTRUCTIONS

1. REAR CABINET REMOVAL

(1) Remove four screws 1 and three screws 2, then remove

the rear cabinet in the direction of the arrow. (See Fig. 1-1)

2. HIGH-VOLTAGE CAP (ANODE CAP) REMOVAL

2-1. Cautions before Removing

Anode cap

Front cabinet

1

1

Rear cabinet

1

2

2

2

1

Fig. 1-1

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

Grip

CRT GND

Hook

CRT GND

CRT

Fig. 2-1

Anode cap

Discharge the anode voltage. (See Fig. 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.

– 3 –

CRT

Anode button

Hook

Fig. 2-2

(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 Fig. 2-3)

1

Anode cap

2

1

(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 Fig. 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.

2-1. Caution before Reinstalling

CRT

Left

Hook

Hook

CRT

Hook

Fig. 2-3

Anode cap

Pull out

CRT

Anode button

Fig. 2-4

Anode cap

Right

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 Fig. 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 Fig. 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
(KS-650N).
Caution : Be careful that silicone grease does not

enter the anode button.

Fig. 3-1

Anode button

Installation
section

– 4 –

Fig. 3-2

(3) Eliminate twisting, etc. of the high-voltage cable and

arrange it so that no twisting occurs. (See Fig. 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 Fig. 3-4)
Caution : Take great care not to damage the anode cap.

High-voltage cable

Anode cap

Fig. 3-3

(5) Fit your forefinger over the projection at the center of the

cap and hold the cap between your thumb and middle
finger. (See Fig. 3-5)

Fig. 3-4

Fig. 3-5

– 5 –

(6) Apply the hook on one side to the anode button as shown

on the figure. (See Fig. 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 Fig. 3-7.

Anode button

Hook

30˚

Anode button

Hook

Hook

Fig. 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

close contact between the cap and CRT.

(11) Check that the anode cap is in close contact with the CRT.

(See Fig. 3-8)

Anode button

Fig. 3-6

Anode cap

– 6 –

Skirt

Fig. 3-8