Sharp VL-PD1U - Useful Tips; Troubleshooting Common Issues

VL-PDl U
11 m USEFULTIPS (PROBLEMS DIFFER FROM THOSE FOUND ON VHS OR 8MM
DECKS BECAUSE THE SIGNALS ARE DIGITALLY PROCESSED.)
Problems
>amera (EE mode)
Major circuits to be checked
l CCD
l Camera circuits (CDS, ADC, DSP)
. PPW (IC4401)
l LCD_DSP (ICSOO)
l System controller (IC701)
. VI0 (IC1401)
JCR (EE mode)
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/
Blueback fails
to appear.
l Mechanical controller (IC7701)
l LCD_DSP (ICSOO)
l System controller (IC701)
0 Zoom (IC251)
l CLOCK GENERATOR (IC471)
J c
Camera (REC mode)
l Zoom (IC251)
VCR (PB mode)
l CLOCK GENERATOR (IC471)
\
0
Picture fails to
appear when tape
recorded on this
unit or another unit
is played back.
(EE OK)
\
Camera (REC mode)
. PLL (lC3401)
VCR (PB mode)
l ATF (lC3402)
l Head amplifier (IC301)
*
2
/
Dirty or defective video head
Blueback when
tape recorded on
this unit or another
unit is played back.
(EE OK)
/ .
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11-l