DOWNLOAD Sharp DV-RW250H (serv.man5) Service Manual ↓ Size: 4.36 MB | Pages: 117 in PDF or view online for FREE

Model
DV-RW250H (serv.man5)
Pages
117
Size
4.36 MB
Type
PDF
Document
Service Manual
Brand
Device
DVD / Complete
File
dv-rw250h-sm5.pdf
Date
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TROUBLESHOOTING GUIDE
E-7
Check DECK MECHANISM.
CAN NOT FF/REW
YES
NO
At FF/REW, does voltage
at pin 98 of IC3001
change?
Check of IC3001.
TROUBLESHOOTING GUIDE
E-8
Change CYLINDER unit.
TAPE LOADING IS OK, BUT
UNLOADS IMMEDIATELY
Check POWER BLOCK.
Change IC3001.
Check Q3006 and Q3008.
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Does CYLINDER
rotate?
Is there HEAD SW
PULSE at TP3002.
Is the voltage
at pin 2 of CP3001
12V ?
At play, is the voltage
at pin 12 of CP3001 2.6V ?
Is PG PULSE signal
inputted to pin 104
of IC3001 ?
TROUBLESHOOTING GUIDE
E-9
5V
Change
CYLINDER MOTOR.
Change IC3001.
Change CYLINDER MOTOR.
YES
YES
NO
NO
AT PLAY, THE PICTURE
JITTERS VERTICAL MINUTELY
Is FG wave of CP3001
at pin 11 5V ?
Is pin 12 of CP3001 2.6V ?
TROUBLESHOOTING GUIDE
E-10
AUTO TRACKING
DOES NOT OPERATE
2.5Vp-p
YES
YES
NO
NO
In auto tracking, is the
voltage at pin 24 of IC3001
more than DC 0.2V ?
Does the CTL pulse
signal (about 2.5Vp-p)
appear at pin 7 of IC3001.
Check CONTROL HEAD.
Change IC3001.
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