Sony KE-42M1 / KE-MV42A1 / KE-MV42M1 / KE-P42M1 Service Manual ▷ View online
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Symptom
Defect
Cause / Description
Combined
cells/Dark dots
Combined cells:
Multiple
cells
combined from side to side, or up and
down.
down.
Dark dots:
A cell not lighting by
receiving signals due to a foreign
material or bubble, or abnormal ITO.
material or bubble, or abnormal ITO.
Bright dots
Bright dots:
A cell lighting
abnormally due to a foreign material or
bubble, color mixture or blur of
phosphor, or rib barrier OPEN.
bubble, color mixture or blur of
phosphor, or rib barrier OPEN.
Phosphor blur
Phosphor blur:
Rib barrier OPEN, or
a cell invaded by another cell.
Phosphor
color mixture
Phosphor color mixture:
A cell with
dried particles given from another cell,
or a cell unable to display original color
due to mask hole.
or a cell unable to display original color
due to mask hole.
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Defect : 6. Address (Vertical Stripe) Open
Defect: 7. Address (Vertical Stripe) Short
Symptom: A line or block does not light up in
Address electrode direction (1 Line open, Block
Open).
Cause :
(1) Manufacturing : Panel electrode single
line/Foreign material/Electrostatic/COF defect
(2) Parts : COF/Board/Connector defect
(3) Operation : Assembling error/Film damage
Symptom: Another color simultaneously appears because
adjacent data recognizes the single pattern signal.
Cause :
(1) Manufacturing : Panel electrode short/Foreign
material/Conductive foreign object inside COF
defect/Lighting electrode cutting defect
(2) Parts : COF/Buffer connector defect
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Defect: 8. Address Output Error
Defect: 9. Sustain (Horizontal Stripe) Open
Symptom: A defect other than Address Open and
Short. Data printout signal error occurring at a certain
gradation or pattern.
Symptom: One or more lines do not light up in
Sustain direction.
Cause :
(1) Cause : Manufacturing: Panel bus electrode single
line/FPC pressure defect
(2) Parts: FPC/Board/Connector defect, or connector
disconnection
(3) Operation: Assembling error
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Defect: 10. Sustain (Horizontal Stripe) Short
Defect: 11. Dielectric material layer damage
Symptom: Combined or adjacent lines are Short in
Sustain direction. The lines appear brighter than
others at Ramp gradation pattern or low gradation
pattern.
Cause:
(1) Manufacturing: Panel electrode short/Foreign
material
(2) Parts: Board/Connector/Pin defect
(3) Operation : Connecter/Assembling error
Symptom: Burn caused by the damage of Address
Bus dielectric layer appears in the panel
discharge/non-discharge area. Also Open/Short
occurs by the damage of Address/Sustain printout.
<Add Block and Line Open>
<Add and Sus Open>
Cause:
Layer uneveny/Abnormal voltage/Foreign material/
Repair failed
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