Useful Tips (Problems Differ From Those Found On Vhs Or 8Mm Decks Because The Signals Are Digitally Processed.) - Sharp VL-PD3U Service Manual

VL-PD3U
11. USEFUL TIPS (PROBLEMS DIFFER FROM THOSE FOUND ON VHS OR
8MM DECKS BECAUSE THE SIGNALS ARE DIGITALLY PROCESSED.)
Camera (EE mode)
VCR (EE mode)
Camera (REC mode)
VCR (PB mode)
Major circuits to be checked
l
CCD
0 Camera circuits (CDS, ADC, DSP)
. PPW (lC4453)
l
LCD-DECODER (IC802)
l
System controller (IC701)
. VI0 (IC1401)
Major circuits to be checked
l
Mechanical controller (IC7701)
l
LCD-DECODER (lC802)
l
System controller (IC701)
l
Zoom (IC251)
l
CLOCK GENERATOR (IC451)
Major circuits to be checked
l
Zoom (IC251)
l
CLOCK GENERATOR (IC451)
Camera (REC mode)
VCR (PB mode)
Camera (REC mode)
VCR (PB mode)
tape recorded on
this unit or another
unit is played back.
recorded on this or
unit or another
unit is played back.
unit or another
Major circuits to be checked
. PLL (IC3401)
l
ATF (lC3402)
l
Head amplifier (IC301)
* Dirty or defective video head
Major circuits to be checked
. PLL (IC3401)
l
ATF (163402)
l
Head amplifier (IC301)
* Dirty or defective video head
VCR (PB mode) + color bar
VCR (PB mode) + color bar
Camera (EE mode)
There is considerable
randam block noise.
Major circuits to be checked
l
Zoom (IC251)
Major circuits to be checked
Major circuits to be checked
l
Adjustment of the electromagnetic
l
Y data between camera DSP (IC201)
conversion circuit system.
and LCD DECODER (IC802) is
-
missing.
II-I