television 1 jess role @ ueab picture tube. television 1 jess role @ ueab other names crt cathode...
Post on 16-Dec-2015
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Television 1 Jess Role @ UEAB
Picture Tube
Television 1 Jess Role @ UEAB
Other names
• CRT cathode ray tube• Screen• Picture tube• Picture bulb
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Materials used
• Glass• Phosphor• Stainless plate• Steel • Iron• Tungsten• Aluminum
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television Phosphor number designation
• P 22 designated for color• P 4 for black and white• P 7 greenish-yellow light output• P 1 CRT for oscilloscope• P 11 for photographic
application that emit blue light
Television 1 Jess Role @ UEAB
Worldwide type designation system (WTDS)
• Type A – for television• Type M – monitor• AAA-DZZ designation for US tubes• EAA-HZZ – European tubes• JAA-MZZ – Japanese Tubes• X – represent a color picture tube
example of WTDS A6AAAOOX
Television 1 Jess Role @ UEAB
Picture tube length and deflection Angle
• Length 9 – 25 inches• 50- 114 degrees deflection angle• 105 degrees horizontal deflection
angle
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Picture tube bases
Television 1 Jess Role @ UEAB
Picture tube parts
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Electrostatic focus
Television 1 Jess Role @ UEAB
Picture tube PS
Television 1 Jess Role @ UEAB
Flat picture tube
Television 1 Jess Role @ UEAB
Porta TV
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Gun Arrangement
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
Problem and Symptoms
• Low picture clarity• No picture filament light ok high
voltage ok• Picture tube face turn to white• Black spot on the middle of the
picture tube• Low phosphor• Blurred picture
Television 1 Jess Role @ UEAB
Tube testing
• Isolation technique • Picture tube tester• Variable Filament voltage supply• Observation and analysis• Second opinion
Television 1 Jess Role @ UEAB
Picture Tube Replacement
• Cost effectiveness• Availability • Substitution (use tube manual)• Picture tube size• Brand• Model number or serial numbers• Structure and mounting• Make or production code
Television 1 Jess Role @ UEAB
Television 1 Jess Role @ UEAB
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