akira 21WHP3/BN, Руководство по обслуживанию

Страница: 9 / 59

9
Model No: 21WHS3-Bn
Version 1.0
SAFETY CAUTIONS FOR PRODUCTS
Many electric and mechanical components in AKPH01 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.
CIRCUIT ADJUSTMENTS
GENERAL INFORMATIONS
All adjustment are thoroughly checked and corrected when the receiver leaves the
factory. Therefore the receiver should operate normally and produce proper color and
B/W pictures upon installation. However, several minor adjustments may be required
depending on the particular location in which the receiver is operated.
This receiver is shipped completely in carton. Carefully draw out the receiver from
the carton and remove all packing materials. Power cord into a convenient 220 volts
50 Hz AC two pin power outlet. Turn the receiver ON. Check and adjust all the
customer controls such as BRIGHTNESS, CONTRAST and COLOUR Controls to
obtain natural color or B/W picture.
AUTOMATIC DEGAUSSING
A degaussing coil is mounted around the picture tube so that external degaussing after
moving the receiver is normally unnecessary, providing the receiver is properly
degaussed upon installation. The degaussing coil operates for about 1 second after the
power to the receiver is switched ON. If the set is moved or faced in a different
direction, the power switch must be switched off at least 30 minutes in order that the
automatic degaussing circuit operates properly. Should the chassis or parts of the
cabinet become magnetized to cause poor color purity, use an external-degaussing
coil. Slowly move the degaussing coil around the faceplate of the picture tube, the
side and front of the receiver and slowly withdraw the coil to a distance of about 2m
before disconnecting it from AC source. If color shading still persists, perform the
COLOUR PURITY ADJUSTMENT and CONVERGENCE ADJUSTMENTS
procedures.