DOWNLOAD Sharp XG-PH70X (serv.man4) Service Manual ↓ Size: 994.37 KB | Pages: 17 in PDF or view online for FREE

Model
XG-PH70X (serv.man4)
Pages
17
Size
994.37 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Troubleshooting Table
File
xg-ph70x-sm4.pdf
Date
PREV: Sharp XG-PH70X (serv.man3) Service Manual

Sharp XG-PH70X (serv.man4) Service Manual ▷ View online

XG-PH70X/XG-PH70X-N
4 – 1
XG-PH70X
Service Manual
 
CHAPTER 4. 
TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
Checking the PWB Performance
                 
                
DVI input in trouble
Video & S-video input in 
trouble
RGB input in trouble
                 
                
Feed the test pattern sig-
nal from PC.
Page 4-2, 4-3 Go to 
"checking the S-Video & 
video circuit".
Feed the test pattern sig-
nal from PC.
                 
                
Is specified cable Con-
nected between Source 
and projector?
NO
Use specified cable.
Is specified cable con-
nected between PC and 
projector?
NO
Use specified cable.
YES
YES
Is supply voltage as spec-
ified?
NO
Power circuit in trouble.
Is supply voltage as spec-
ified?
NO
Power circuit in trouble.
YES
YES
Does image appear?
NO
Check the connectors, 
starting from the Source 
input circuit.
Does image appear?
NO
Check the connectors, start-
ing from the Source input cir-
cuit.
YES
YES
Check the PC I/F unit
Check the PC I/F unit
Checking the PWB Performance
                    
RGB through output in trou-
ble
Remote control in trouble
Audio input in trouble
                    
Through output circuit in 
trouble.
Checking the IR Unit.
Page 4-3, 4-4 Go to "Check-
ing the audio signal".
              
                    
Is specified cable Con-
nected between Source and 
projector?
NO
Use specified cable.
YES
Is supply voltage as speci-
fied?
NO
Power circuit in trouble.
YES
Does sound appear?
NO
Check the connectors, starting 
from the Source input circuit.
XG-PH70X/XG-PH70X-N
4 – 2
Checking the PWB Performance
Audio output in trouble
RGB + HV input in trouble
RS232 channel input in trouble
Page 4-4 Check the audio output circuit 
and its parts.
Feed the pattern signal from source.
Check the RS232 channel input signal from 
source.
              
Is specified cable Connected between 
Source and projector?
NO
Use specified cable.
YES
Is supply voltage as specified?
NO
Power circuit in trouble.
YES
Does image appear?
NO
Check the connectors, starting from the 
Source input circuit.
YES
Check the PC I/F unit
Check S-Video signal input.
Go to "Checking the S-Video signal circuit".
Are there signal "C" at C418 output?
Are there signal "Y" at C419 output?
NO
Check C418, C419 and their peripheral circuits.
YES
Are there signal "C" at emitter of Q414 output?
Are there signal "Y" at emitter of Q415 output?
NO
Check Q414, Q415 and their peripheral circuits.
YES
Are there signal at pin(7) of IC406?
NO
Check IC406 and its peripheral circuits.
YES
CN3001 is not stable or breakdown.
XG-PH70X/XG-PH70X-N
4 – 3
Check Video signal input.
Go to "Checking the Video circuit".
Are there signal at C411 output?
NO
Check C411 and its peripheral circuits.
YES
Are there signal at emitter of Q412 output?
NO
Check Q412 and its peripheral circuits.
YES
Are there signal at pin (5) of IC406?
NO
Check IC406 and its peripheral circuits.
YES
CN3001 is not stable or breakdown.
Check Audio signal input of Video.
Go to "Checking the Audio circuit".
Are there signal at C420 output?
Are there signal at C423 output?
NO
Check C420, C423 and their peripheral circuits.
YES
Are there signal at pin (7) of IC402 and IC404?
NO
Check IC402, IC404 and their peripheral circuits.
YES
Are there signal at C445 output?
Are there signal at C447 output?
NO
Check C445, C447 and their peripheral circuits.
YES
CN3001 is not stable or breakdown.
Check Audio signal input of PC1.
Go to "Checking the Audio circuit".
Are there signal at C412 output?
Are there signal at C413 output?
NO
Check C412, C413 and their peripheral circuits.
YES
Are there signal at pin (7) of IC402 and IC404?
NO
Check IC402, IC404 and their peripheral circuits.
YES
Are there signal at C445 output?
Are there signal at C447 output?
NO
Check C445, C447 and their peripheral circuits.
YES
CN3001 is not stable or breakdown.
XG-PH70X/XG-PH70X-N
4 – 4
Check Audio signal input of PC2.
Go to "Checking the Audio circuit"
Are there signal at C414 output?
Are there signal at C417 output?
NO
Check C414, C417 and their peripheral circuits.
YES
Are there signal at pin (7) of IC402 and IC404?
NO
Check IC402, IC404 and their peripheral circuits.
YES
Are there signal at C445 output?
Are there signal of C447 output?
NO
Check C445, C447 and their peripheral circuits.
YES
CN3001 is not stable or breakdown.
Check Audio output signal.
Go to "Checking the Audio circuit".
Are there signal at C415 output?
Are there signal at C416 output?
NO
Check C415, C416 and their peripheral circuits.
YES
Are there signal at pin (1) of IC401 and IC403?
NO
Check IC401, IC403 and their peripheral circuits.
YES
Are there signal at C446 output?
Are there signal at C448 output?
NO
Check C446, C448 and their peripheral circuits.
YES
CN3001 is not stable or breakdown.
Checking the Main unit.
Check output signal of input1 and 2.
Are there signal at R3045, R3047 and R3049 output?
NO
Check R3045, R3047, R3049 and their peripheral circuits.
YES
Are there signal at pin (2) of FL3006, FL3007 and FL3009 
input?
NO
R3045, R3047 and R3049 are breakdown.
YES
Are there signal at pin (1) of FL3006, FL3007 and FL3009 out-
put?
NO
FL3006, FL3007 and FL3009 are breakdown.
YES
CN3001 is not stable or breakdown.
Page of 17
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  • DOWNLOAD Sharp XG-PH70X (serv.man4) Service Manual ↓ Size: 994.37 KB | Pages: 17 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp XG-PH70X (serv.man4) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp XG-PH70X (serv.man4) Projector. Information contained in Sharp XG-PH70X (serv.man4) 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.

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