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15502(N)
V1
2-2. VIDEO CIRCUITADJUSTMENT
\
.
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(IO:l)
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)
L
Adjustment Relay Jig
VHJ-0065
: 5-wire fiat cable for VP-1 PWB assembly
ALIGNMENT
TAPE COLOR BAR SIGNAL
ADJUSTMENT
RELAY JIG
WPV-TCS
"H. Sync signal
Color
bar signal waveform
(VHJ-0008)
Fig. 2-2-1
WPVTCP
m
9
~s
g;~~j$:
(75%)
vu
100%
White
Black
Color bar pattern (VHJ-0008) on monitor
TV
Fig.
2-2-2
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.
PPv-PP2UE
VP-1 PWB Assembly
3
8%
Relay Jig
Q
VHJ-0065
Flat Cable 3
>>~
,
~ Bracket
WinderAssemW%
Fig. 2-2-3
–11–
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