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3 7 63 1515 0
6-1 MECHANICAL ADJUSTMENTS
For the mechanical adjustments, please refer to the
"VHS MECHANICAL ADJUSTMENT MANUAL
(S MECHANISM)" (9-921-647-11).
6-2. ELECTRICAL ADJUSTMENTS
See the adjusting part location diagram from on page 6-6
for the adjustment.
2-1.
PREPARATION BEFORE ADJUSTMENT
2-1-1.
Equipment Required
The measuring instruments used for this alignment include:
1)
Monitor TV
2)
Oscilloscope, dual-trace, bandwidth of 30 MHz or more, with
delay mode (A probe 10:1 should be used unless otherwise
specified.)
3)
Frequency counter
4)
NTSC Pattern generator
5)
PAL Pattern generator
6)
Digital voltmeter
7)
Audio generator
8)
Audio level meter
9)
Audio attenuator
10) Alignment tapes
KRV-51P (PAL)
KRV-51N2 (NTSC) Part No. : 8-192-605-32
2-1-2.
Equipment Connection
TE
L 13942296513
Unless otherwise specified, connect and adjust the measuring
instruments as shown in the following diagram.
VIDEO LINE IN
Pattern generator
Video output
(75 Ω )
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SLV-GA30/GA50/GA66/GA70K/GA77K/GF80/GF90K/GF99K/P66/PH99
Part No. : 8-192-605-36
Monitor TV
VCR
VIDEO LINE OUT
Fig. 6-2-1
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SECTION 6
2 9
8
ADJUSTMENTS
2-1-3.
Set-up of Adjustment
In this adjustment, PAL or NTSC pattern generator is connected
with LINE input terminal. When check to tuner, connected AERIAL
terminal. Check that the synchronizing signal of the Y signal has
an amplitude of approximately 0.7 V and that the burst signal has
an amplitude of approximately 0.3 V and its waveform is flat. And
check that the level ratio of burst signal to "red" signal is 0.30 :
0.66. The video signal (color bar) used for electrical aligning this
unit is shown in Fig. 6-2-2.
PAL model
Approx. 0.7 V
Approx. 0.3 V
Horizontal sync signal
NTSC model
About 0.7 V
Q Q
3
6 7
1 3
About
0.3 V
Horizontal sync signal
Fig. 6-2-2 Color Bar Signals of Pattern Generator
2-1-4.
Alignment Tape
• Contents of KRV-51N2/51P
Mode
1
7 minutes
SP
2
3 minutes
3
7 minutes
LP
4
3 minutes
.
6-1
9 4
2 8
White (Approx. 75%)
Red
White (100%)
1 5
0 5
8
2 9
9 4
Red
Period
Video signal
Hi-Fi
Color bar
Monoscope
400Hz
Color bar
(L/R)
Monoscope
m
co
9 9
Approx.
0.3 V
Burst signal
(It must be flat.)
About
2 8
9 9
0.3 V
Burst signal
(It must be flat.)
Audio signal
Normal
400Hz