Important Safety Notice

Special components are used in this television set which are important for safety. These parts are identified on the schematic diagram by the symbol . It is essential that these critical parts are replaced whit the manufacturer’s specified replacement parts to prevent X-ray radiation, shock, fire or other hazards. Do not modify the original design whitout manufacturer’s permission.

TABLE OF CONTENTS
OPERATION GUIDE	03
SERVICE ADJUSTMENTS AND CALIBRATIONS
HOW TO OPERATE THE DAC CONTROLS	06
HOW TO ENTER THE SERVICEMAN MODE	06
HOW TO EXIT THE SERVICEMAN MODE	06
DAC DIRECT TABLE	07
MEMORY - DIRECT ACCESS METHOD	07
EEPROM - MEMORY MAP	07
ELECTRICAL INSPECTION	07
INSPECTION OF THE DEFLECTION CIRCUITS	07
CUT OFF - PRE ADJUSTMENTS	08
CALIBRATION OF VIDEO IF	08
AFT ADJUSTMENTS	09
AGC-RF ADJUSTMENTS	09
NOISE LEVEL ADJUSTMENTS	09
VIDEO OUT ADJUSTMENTS	10
SUB-CONTRAST ADJUSTMENTS	10
COLOUR SATURATION ADJUSTMENTS	10
SHARPNESS ADJUSTMENTS	10
SHUT DOWN SYSTEM COFIRMATION	10
HORIZONTAL WIDTH AND CENTERING ADJUSTMENTS	11
VERTICAL HEIGHT AND CENTERING ADJUSTMENTS	11
WHITE BALANCE PRE ADJUSTMENTS	11
CRT CUT OFF ADJUSTMENTS	11
FOCUS ADJUSTMENTS	12
FRONT PANEL CHECKING	12
AV IN TERMINALS CHECKING	12
AUTOMATIC AND MANUAL MEMORIZATION	13
TUNE CHECKING	13
AUDIO CHECKING	13
PURITY AND CONVERGENCE ADJUSTMENTS	14
SCHEMATICS DIAGRAMS	15
IC601 BLOCK DIAGRAM / PINS AND FUNCTIONS	16
WAVE FORMS	17
CABINET PARTS LOCATION	19
CABINET REPLACEMENT PARTS LIST	20
ELECTRICAL REPLACEMENT PARTS LIST	21

General Guidelines

An Isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. It will also protect the Receiver from being damaged by accidental shorting that may occur during servicing.

When servicing, observe the original lead dress, especially in the high voltage circuit. Replace all damaged parts (also parts that show signs of overheating.)

Always Replace Protective Devices, such as fishpaper, isolation resistors and capacitors, and shields after servicing the Receiver. Use only manufacturer’s recommended rating for fuses, circuit breakers, etc.

High potentials are present when this Receiver is operating. Operation of the Receiver without the rear cover introduces danger from electrical shock. Servicing should not be performed by anyone who is not thoroughly familiar with the necessary precautions when servicing high-voltage equipment.

Extreme care should be practiced when Handling the Picture Tube. Rough handling may cause it to implode due to atmospheric pressure (14.7 lbs per sq. in). Do not sick or scratch the glass or subject it to any undue pressure. When handling, use safety goggles and heavy gloves for protection. Discharge the picture tube by shorting the anode to chassis ground (not to the cabinet or to other mounting hardware). When discharging, connect cold ground (i.e. dag ground lead) to the anode with a well insulated wire or use a grounding probe.

Avoid prolonged exposure at close range to unshielded areas of the picture tube to prevent exposure to X-ray radiation.

The Test Picture Tube used for servicing the chassis at the bench should incorporate safety glass and magnetic shielding. The safety glass provides shieldinf for the tube viewing area against X-ray radiation as well as implosion. The magnetic shield limits X-ray radiation around the bell of the picture tube in addition to restricting magnetic effects. When using a picture tube test jig for service, ensure that the jig is capable of handling 31kV without causing X-ray radiation.

Before returning a serviced receiver to the owner, the service technician must thoroughly test the unit to ensure that is completely safe to operatore. Do not use a line isolation transformer when testing.

Warning !

It is essential that these critical parts are replaced with the manufacturer’s specified replacement parts to prevent X-ray radiation, shock, fire or other hazards.

WARNING !!

Esquema Elétrico do chassi MX5Y

(em anexo)

Conserve-o sempre junto deste manual.

HOW TO OPEN THE CABINET

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