JVC HR-D540EE - Electrical Adjustments; Required Test Equipment

SECTION 2
ELECTRICAL ADJUSTMENTS
2.1 PREPARATION
Electrical
adjustments
are
required
after
replacing
circuit
components
and
certain
mechanical
parts.
It
is
important
to
perform
these
adjustments
only
after
all
repairs
and
replacements
have
been
completed.
Also,
do
not
attempt
these
adjustments
unless
the
proper
equipment
is
available.
2.1.1 Required test equipment
1. Color television or monitor
2.
Oscilloscope:
wide-band,
dual-trace,
triggered
delayed
sweep
3. Frequency counter
4, Audio osciliator
5. Audio voltmeter
6. Digital voltmeter
7. Signal generator: RF/IF sweep/marker
8.
Signal
generator:
PAL
color
bar,
stairstep,
video
sweeper
9.
Signal
generator:
Audio
multiplex
TV
signal
generator
10. Recording tape
11, Alignment tape: MH-2
12. Presetting unit (PTU94008)
Presetting unit
O=LLeUeL> O=LeLeLr lle
UeLi-LI-Linlile
White (100%) signal
aed Burst signal
x, fl ibl
O7”V (as flat as possible)
approx.
approx. 0.3V
0.3 Vp-p
Horizontal
sync signal
Fig. 2-1-1 Color bar signal of pattern generator
White (100%)
Cc
0
>
QO
White (75%)
Horizontal Vv (R-Y)
sync U (B-Y)
Fig. 2-1-2 Color bar signal waveform
(75%)
Fig. 2-1-3 Color bar pattern
2-1