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8-3·5.
Playback SP
/
LP Adjustment
(SV-35
Board)
Mode
Various playback
(CUE)
Signal
Measurement Point
Measuring Instrument
Adjusting Element
Specified Value
Adjusting method :
Alignment tape
for operation
check
(SP
mode : WR5-3CSP)
(LP
mode
:
WR5-3CL)
TP202
Digital voltmeter
RV201
Vs+
VL
2
------~
1)
Connect
Pins
@
(TEST A)
and@
(COM) of CN017
with a jumper
wire
(TEST
1
MODE).
2) Set S602 (SP
/
LP)
to the LP position, then play
back the
SP
mode tape
(WR5-3CSP)
in
CUE mode.
3)
Measure the present
voltage (Vs)
at
Pin
@
(TP201) of
IC201 with a digital
voltmeter
and
record it.
(Vs)
4) Set S602
(SP
/
LP) to the
SP
position, then
play
back
the LP mode tape
(WR5-3CL)
in
CUE
mode.
5) Measure the present voltage (VL) at Pin
@
(TP201)
of IC201 with a digital voltmeter and
record it.
(VL)
6) Adjust
voltage
at TP202 to (Vs;
VL)
with
RV201.
7) Remove the jumper wire
attached
in
step
1).
-
155
-
8-4.
VIDEO ADJUSTMENT
As a rule.
follow
the
order below for adjustment of
the
video
system.
ThP.
color
video signal supplied by the pattern
generator is used as input video
signal
for video
system
adjustment in
the recording
mode. Confirm
that the
sync
and
color
burst
components
meet
the
specifications
in Fig. 8-2
of
the
"Setup
for
Adjustmentw section.
(Adjustment
order)
1)
Playback frequency characteristic adjustment
2)
Flying erase check
3) Crystal oscillator
Co
adjustment
4)
Y
/
C
separation
adjustment
5)
IR
2 adjustment
6) Emphasis
input level adjustment
7)
Sync
AGC adjustment
8)
PB
Y
level 1 adjustment
9)
PB
Y
level 2 adjustment
10)
Y
FM
carrier
frequency adjustment
11) Y
FM deviation adjustment
12)
AC
clip check
13)
Chroma
emphasis fo adjustment
14) REC Y recording current adjustment
15)
REC C recording
current
adjustment
16)
REC AFM recording
current
adjustment
17) REC AFT recording
current adjustment
18)
Delay
chroma
gain adjustment
19)
Quasi burst phase adjustment
20)
Delay burst
phase adjustment
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