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L
L
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
c,
Oscilloscope
Probe
Input capacity
: less than 25 pF (10:1)
less than 40 pF (1 :1)
I
Covering frequency
: DC-4OMHZ(1O:1)
DC-30
MHZ (1:1)
Digital Voltmeter
DC range
Alignment
Tape
VHJ-0008 or VHJ-0023
: SP mode, color bar, 1 kHz
I (Color bar signal waveform is described below. Refer to Fig. 2-2-1)
I Adjust Relay Jig
I VHJ-0067
: 12-wire flat cable for VP-1 PWB assembly
ALIGNMENT
TAPE COLOR BAR SIGNAL
WPV-TCS
m
I o.7vp-p
lvp-p
I
Im
n——
----
1
1—
100% White
II-f
'H.Sync Si&al
Color bar signal waveform
(VHJ-0008)
Fig. 2-2-1
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
RJ-PA4HIU
.,,
VP-1 PWB
Assem
Relay Jig
VHJ-0067
FlatCable
CylinderAssembl
Fig. 2-2-3
I
-F
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1
L.1
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—.—- .- —
-11–
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