Read Sharp PG-M20S (serv.man34) Technical Bulletin online
LV-080
Sharp Electronics (UK) Ltd., Technical Services Group
Model
PG-M20X, PG-M20S, PG-M25X
Phenomenon
• No picture
• Lamp does not light up or it goes off.
• Locks up, etc.
For more details, refer to the flowchart on the page 3 of this technical report.
• Lamp does not light up or it goes off.
• Locks up, etc.
For more details, refer to the flowchart on the page 3 of this technical report.
Servicing
In the above model, the following upgrade has been implemented to improve performance
and reliability. When you service/repair this model, please perform the following
countermeasures to the unit.
countermeasures to the unit.
No
Countermeasure
Take the steps according to
(Effective models)
(Effective models)
1
• Add a 100k. resistor (VRS-CY1JF104J ) in
parallel to R7421.
• Adjust the voltage of 2.5V line to 2.62±0.02
with VR7401.
• Update the firmware of unit
parallel to R7421.
• Adjust the voltage of 2.5V line to 2.62±0.02
with VR7401.
• Update the firmware of unit
*1
Technical report LV-064
Revised
(PG-M20X/S, PGM-25X)
Revised
(PG-M20X/S, PGM-25X)
2
• Check the colour wheel if it is defective. If
so, replace it with the improved type
(RMOTBA002WJZZ)
so, replace it with the improved type
(RMOTBA002WJZZ)
*2
, then
perform the electrical adjustments of CW
index and White balance.
index and White balance.
Technical report LV-075
(PG-M20X/S, PGM-25X)
(PG-M20X/S, PGM-25X)
3
• Change R2009 to 100. (VRS-CY1JF101JY).
• Add 470 pF (VCCCCY1HH471JY) as
C2009.
• Update the firmware of unit
• Add 470 pF (VCCCCY1HH471JY) as
C2009.
• Update the firmware of unit
*1
.
Page 4 of this technical report
(PG-M20X/S, PGM-25X)
(PG-M20X/S, PGM-25X)
4
• Add a jumper (QCNW-1869TAZZ) to the
PC I/F unit.
PC I/F unit.
Page 5 of this technical report
(PG-M20X/S, PGM-25X)
(PG-M20X/S, PGM-25X)
5
• Add a jumper (QCNW-B664WJZZ) to the
power unit.
power unit.
Page 6 of this technical report
(PG-M20X)
(PG-M20X)
6
• Clean the dust from the cooling fan and the
other PWB units.
other PWB units.
(PG-M20X/S, PGM-25X)
7
• Add two lead wires (QCNW-B547WJZZ)
between the input unit and the power unit.
between the input unit and the power unit.
Page 7 of this technical report
(PG-M20X/S, PGM-25X)
(PG-M20X/S, PGM-25X)
8
• Change C9523 to 33 µF
(VCAAPC0GJ336MY).
(VCAAPC0GJ336MY).
Page 8 of this technical report
(PG-M20X/S, PGM-25X)
(PG-M20X/S, PGM-25X)
9
• Add 1k . (VRS-CY1JF102J) in parallel to
C3738.
• Update the firmware of unit
C3738.
• Update the firmware of unit
*1
.
Page 9 of this technical report
(PG-M25X)
(PG-M25X)
10
• Update the firmware of Wireless LAN Card.
Technical reportLV-065
(PG-M25X)
(PG-M25X)
UPGRADE FOR THE IMPROVEMENT OF PERFORMANCE
AND RELIABILITY
TECHNICAL BULLETIN
Date:
15 October 2003
Model: PGM20S
PGM25X
Ref.:
005
Colour: White
Page:
Page:
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