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15500(N) V1
2-2. VIDEO CIRCUIT ADJUSTMENT
¢
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 (1:1)
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
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.
WPV-TCS
100% White
Burst signal
H. Sync signal
PPV-PP2L/E
Color bar signal waveform (VHJ-0008)
VP-1 PWB Assembly
Fig. 2-2-1
WPV-TCP
Relay Jig
VHJ-0066
Flat Cable
100%
White
Cylinder Assembly
Color bar pattern (VHJ-0008) on monitor TV
Fig. 2-2-2
Fig. 2-2-3
-11—
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