6
Model No: 21LAS1Bn
Version 2.0
SAFETY INSTRUCTION
WARNING: BEFORE EXAMINING AND SERVICING THIS CHASSIS,
READ CAREFULLY THE FOLLOWING SAFETY INSTRUCTIONS.
X-RAY RADIATION PRECAUTION
1. The EHT must be checked every time the receiver is serviced to ensure that the CRT does not emit
X-ray radiation as result of excessive EHT voltage. The nominal EHT for this receiver is 22KV at
zero beam current (minimum brightness) operating at AC 220V. The maximum EHT voltage
permissible in any operating circumstances must not exceed 25KV. When checking the EHT, use
the High Voltage Check procedure in this manual using an accurate EHT voltmeter.
2. The only source of X-RAY radiation in this receiver is the CRT. To prevent X-ray radiation, you
should use the same type of CRT when replacing it.
3. Some components used in this receiver have safety-related characteristics preventing the CRT
from emitting X-ray radiation. For continued safety, replacement component should only be made
after referring the Product Safety notice below.
SAFETY PRECAUTION
1. The high voltage in the TV reaches to 22KV when the TV is in operation. Be more careful during
opening the back cover.
a. The high voltage existing in the TV is very dangerous. Refer servicing to qualified personnel
only.
b. Before removing the high voltage cap. Discharge the anode of the CRT and the chassis in
case of electric shock.
c. Wear a pair of goggles when handling the CRT to avoid broken pieces damaging your eyes.
d. Do not hold the CRT neck in case of causing damage to the CRT.
2. When the power cord needs replacing, use the same one as that provided by AKIRA factory.
3. Voltage exists between the hot and cold ground when TV is in operation. Install a separation
transformer during repairing or connecting to any tester for the sake of safety. The power of the
separation transformer should be beyond rated overall power.
4. When replacing a burnout fuse, use the one with the same specifications as the original.
5. When replacing old wire, wind new one round the shaft to weld. When replacing components with
safety in performance, use the same type as that specified by AKIRA and install it in the former
way.
6. Never place wire near high-temperature or high-voltage components.
SAFETY CAUTIONS FOR PRODUCTS
Many electric and mechanical components in AKTP01 /02 chassis have special safety performances,
which are always neglected. Even if replacing them with some components with the same voltage and
power, you can not get effective protection to X-ray. In the circuit diagram, these special electric
components are indicated by the special mark and on the shadow. When replacing any of them,
use the one with the same specifications as the original’s. Otherwise, it may cause X-ray radiation and
damage to overall safety.
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