WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise
Any attempt to service or repair the product deal with in this service information by anyone could result in serious injury or death.
Contents | General Guidelines |
General Guidelines | 02 |
Operation Guide | 03 |
IC 601 - Pins and Functions | 15 |
IC601 and IC451 Voltage Table | 17 |
IC601 - Block Diagram | 18 |
General Summary | 19 |
Service Adjustments and Calibrations |
|
Service Mode | 20 |
How to operate the DAC controls | 20 |
EQUIPMENT REQUIRED | 21 |
AGC RF CALIBRATION | 21 |
BUZZ (SOUND CIRCUIT) | 21 |
ANODE AND HEATER VOLTAGE CONFIRMATION | 21 |
PAL COLOR OUTPUT SIGNAL ADJUSTMENT | 21 |
NTSC | 22 |
PROTECTION CIRCUIT (SHUTDOWN) | 22 |
CONFIRMATION OF OPERATION | 22 |
WHITE QUALITY CALIBRATION | 22 |
VERTICAL DEFLECTION | 22 |
CALIBRATION AND CONFIRMATION | 22 |
CRT CUT OFF CALIBRATION | 23 |
WHITE BALANCE CALIBRATION | 23 |
23 | |
FOCUS CALIBRATION | 23 |
COLOR PURITY ADJUSTMENT | 24 |
CONVERGENCE CALIBRATION | 24 |
EEPROM - Memory Maps | 25 |
Power Source Voltages | 25 |
Main Board Schematic Diagram | 26 |
CRT Board Schematic Diagram | 27 |
Main Board Conductor view | 28 |
Waveform | 32 |
Parts Location | 35 |
Packing and Acessories | 36 |
Replacement Mechanical Parts List | 36 |
Replacement Electrical Parts List | 37 |
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
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
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
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.
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