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v1-14s01 (N)
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2-2. VIDEO CIRCUIT ADJUSTMENT
.
Before making the following
adjustments,
Section 2-1. SERVO CIRCLJiTADJUSTMENT
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 barsignel
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, lkHz
(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)
Iessthan
40 pF (1:1)
Covering
frequency:
DC -40
MHz (10:1)
DC-30
MHZ(1:1)
Frequency
Counter
8 significant
digits
Adjustment
Relay Jig
VHJ-0065: 5-wire flat cable for VP-1 PWB Assembly
ALIGNMENT
TAPE COLOR BAR SIGNAL
'H.Sync Sl&al
COLOR
BAR SIGNAL
WAVEFORM
(VHJ-0008)
Fig. 2.2.1
W W-TCP
m
m
gs
z
co
COgg
3:~6;g:
(75%)
Yu
Iw?fe
White
Black
COLOR
BAR PAITERN
(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
insut%cient
ground
and no proper
play back image can be
obtained.
WPV-TK2UE
VP- I Pwn
*'
u
Assemb
Bracket
Relay Jig
'm
(VHJ-0065)
"
\
o
Flat Cable
~
!
\
,,
I
Ifs'
L4
"':''y-fel%?
""
Ily
Fig. 2.2.3
–8–
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