Table of Contents
Advertisement
VI 14805 { N) l/4
2-2. VIDEO CIRCUIT ADJUSTMENT
Before making the following adjustments, Section 2-1. SERVO CIRCUIT ADJUSTMENT
should be completed.
.
Use the relay jig to provide simple adjustment 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 barsignel)
Oscilloscope
Vertical sensitivity: 5 mV/DIV, external trigger
Band width: more than 10 MHz
Digital Voltmeter
DC range
Alignment Tape
VHJ-0008 or VHJ-0023: SP mode, color bar, 1kHz
(Color bar signal waveform is described below. Refer to Fig. 2.2.1)
Blank Tape
VHS-type cassette tape
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:I)
Frequency Counter
8 significant digits
Adjustment Relay Jig
VHJ-0067: 12-wire flat cable for VP-1 PWB Assembly
ALIGNMENT
TAPE COLOR BAR SIGNAL
WPV-TCS
I 07WJ-P
lvp-p
I
P
Ill -.
'H.Sync Signal
COLOR
BAR
SIGNAL
WAVEFORM
(VHJ-0008)
Fig. 2.2.1
WPV-TCP
w
m
03
z
.=
so
co~al
3~$gg$:
(75%)
vu
100%
White
Black
COLOR
BAR
PATTERN
(VHJ-0008)
ON
MONITOR
TV
Fig. 2.2.2
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 and 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-TK4HE
Bracket _
T-w7P
v~-1 PWB Assembly
\
F&$
Fig. 2.2.3
–8–
Advertisement
Table of Contents
