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15500(N)
VI
2-2. VIDEO CIRCUIT ADJUSTMENT
w"
In this model, video circuit adjustments are not performed. To check whether operations are normal, check the AGC level and
PB-Y level using the following method.
.
Use the adjustment relay jig to provide simple repairing of the VP-1 PWB assembly.
2-2-1. TEST EQUIPMENT
AND STANDARDS
REQUIRED
Color Bar Signal Generator
PAL Color bar signel with 100% white level (EBU color bar signel)
Oscilloscope
Vertical sensitivity
:5 mV/DIV, external trigger
Bandwidth
: more than 10 MHz
Oscilloscope Probe
Input capacity
: less than 25 pF (10:1)
less than 40 pF (1:1)
Covering frequency
: DC -40
MHz (10:1)
DC-30
MHZ(I:I)
Digital Voltmeter
DC range
Alignment Tape
VHJ-0008 or VHJ-0023
: SP mode, color bar, 1 kHz
(Color bar signal waveform is described below. Refer to Fig. 2-2-1)
.
Adjustment Relay Jig
VHJ-0066
: 7-wire flat cable for VP-1 PWB assembly
ALIGNMENT
TAPE COLOR BAR SIGNAL
WPV-TCS
J3
$$~gj'$;
White
Iv
Vp-p
'H. Sync signal
Color bar signal waveform
(VHJ-0008)
Fig. 2-2-1
WPV-TCP
m
f g%
s;~gi~:
(75%)
vu
100'?/0
White
Black
Color bar pattern
(VHJ-0008)
on monitor
TV
Fig. 2-2-2
ADJUSTMENT
RELAY JIG
Connect the flat cable end from the cylinder assembly to the
VP-1 PWB assembly using the relay jig to provide simple
repairing or adjustment of the VP-1 PWB assembly, as shown
in
Fig. 2-2-3. Further,
when adjusting the VP-1 PWB assembly,
be sure to make contact an end of shield case with bracket of
the VP-1 PWB assembly to maintain the shield effect. If the
VP-1 PWB assembly does not contact, there is insufficient
ground and no proper play back image can be obtained.
PPVPP2UE
z
VP-1
PWB
Assembly
8=
Relay Jig
u
VHJ-0066
Flat Cable
Cylinder Assembly &
Fig. 2-2-3
'L
–11–
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