DOWNLOAD Sharp PG-M20S (serv.man11) Service Manual ↓ Size: 48.71 KB | Pages: 21 in PDF or view online for FREE

Model
PG-M20S (serv.man11)
Pages
21
Size
48.71 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Troubleshooting tables
File
pg-m20s-sm11.pdf
Date

Sharp PG-M20S (serv.man11) Service Manual ▷ View online

28
PG-M20S
PG-M20X
TROUBLE SHOOTING TABLE
Yes
No
Checking of Basic Operation
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
No
Does the video input operate 
normally?
Does the DVI input operate 
normally?
Do the component input/DVI input 
operate normally?
Does the RGB input operate 
normally?
Is the user menu displayed?
Does the cooling fan rotate and 
does the lamp light up?
Go to "Checking of Power Unit".
Go to "Checking of Sub-microcomputer 
and Its Periphery"
Go to "Checking of Lamp Lighting-up"
Check the formatter circuit and 
its periphery.
Check IC8013 (AD) and go to 
"Checking of RGB Input".
Is there input signal at pins 
(8), (17) and (23) of IC8013?
Check IC8015 and peripheral 
circuit.
Go to "Checking of Video 
Input". Is there input signal at 
the emitter of Q8002?
Check IC8015 and its 
peripheral circuit.
No
Check IC3852 and its 
peripheral circuit.
No
Check IC3852 and its 
peripheral circuit.
Does the POWER LED light up or 
flicker in red or green?
End
Does the set operate by the set's 
key or the remote controller's 
power key?
29
PG-M20S
PG-M20X
Yes
No
Checking of Power Unit
Are connectors in the power unit 
completely inserted?
Yes
No
Is the lamp door closed 
completely?
Close the lamp door completely by 
screws.
Yes
No
Does the temperature
fuse function?
Replace the fuse as well as its
harness.
Yes
No
Is AC voltage applied across relay 
RL701?
Replace F701.
Yes
No
Is there DC voltage of about 6V at 
pin (1) of CN7002?
Check Q7501, Q7502 and Q7503 
and their peripheral circuits. If any 
circuit is damaged, replace it.
Yes
No
Is there DC voltage of about 370V 
across CN702?
Check the circuits connected to the 
primary side of T701. If any circuit 
is damaged, replace it.
Yes
No
Is there rated voltage at the output 
terminals of CN702 and CN7102?
Check the circuits connected to the 
secondary side of T701. If any 
circuit is damaged, replace it.
Check the PWB circuits of relevant 
output sides.
Insert the connectors CN702, 
CN704, CN7003, CN7001, 
CN7004 and CN7101 completely.
30
PG-M20S
PG-M20X
No
Lamp failure to light up 
(formatter unit)
Yes
Is there the specified voltage at
pin (15) of SC9002?
No
Is there the 180-Hz pulse signal at 
pin (1) of P9002?
Is any of the SC9001, SC9002,
P9002 and P9003 connectors
disconnected or in poor contact?
Yes
Insert the connectors completely.
No
Is there the specified voltage at
pin (11) of P3002?
No
Check the fan circuit
(near IC2101) on the
KEY PWB.
No
Check the power unit.
Are there the specified voltages
at pins (23) and (24) of P3003 on
the input PWB?
Go to "Checking of PC I/F unit"
Yes
Yes
Check the lamp and ballast unit.
Yes
Is the signal at pin (10) of IC9101 
at High level?
No
Are the signals at pins (69) and 
(70) of SC9001 at High level?
Yes
No
Yes
Is the signal at pin (9) of IC9101 
at High level?
No
Trouble with IC9003.
Trouble with IC9101 or its 
peripheral part.
Yes
Is there the 180-Hz pulse signal at 
pin (2) of P9003 when no input 
signal is given?
No
Yes
31
PG-M20S
PG-M20X
Lamp does not light up.
Yes
Yes
Is the cooling fan rotating?
Check the socket
Check the power circuit.
No
Check the power circuit or the fan 
circuit on the key/input PWB.
Yes
Is the color wheel rotating sound 
heard?
No
Check IC3101, the motor driver 
circuit and their periphery. 
Check the waveform of SC3101.
No
Normal
Abnormal
Is the lamp discharging sound 
heard?
Yes
Yes
Is DC 340V voltage applied across 
the ballast power?
Go to "Lamp failure to light up
(formatter unit)".
No
Replace the color 
wheel.
Check the 
formatter PWB.
No
Replace the lamp.
Page of 21
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Sharp PG-M20S (serv.man11) Service Manual ▷ Download

  • DOWNLOAD Sharp PG-M20S (serv.man11) Service Manual ↓ Size: 48.71 KB | Pages: 21 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp PG-M20S (serv.man11) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp PG-M20S (serv.man11) Projector. Information contained in Sharp PG-M20S (serv.man11) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.