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SLV-E850B/E850UX/E880EG/F900B/F900NP/F900UX/F900VC/F990B/F990NP/F990UX/F990VC
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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 adjustment parts location diagram 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 30MHz or more, with
delay mode (A probe 10:1 should be used unless otherwise
specified.)
3)
Frequency counter
4)
Pattern generator
5)
Digital voltmeter
6)
Audio generator
7)
Audio level meter
8)
Audio distortion meter
9)
Audio attenuator
10) Alignment tapes
KRV-51P
Part No. : 8-192-605-36
2-1-2.
Equipment Connection
Unless otherwise specified, connect and adjust the measuring
TE
L 13942296513
instruments as shown in the following diagram.
EURO : CN540
VIDEO LINE IN
Pattern generator
Video output
(75 Ω )
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Monitor TV
VCR
EURO : CN540
VIDEO LINE OUT
Fig. 6-2-1
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SECTION 6
2 9
8
ADJUSTMENTS
2-1-3.
Input Signal Check
Video signal produced by a pattern generator is used as an adjustment
signal to perform electrical alignment for this unit. This video signal
must satisfy the specification.
Unless otherwise specified, place the switches and controls of this
unit in the following positions:
• INPUT SELECT switch ................................................. LINE 1
Connect an oscilloscope to the Video Input terminal. Check that the
synchronizing signal of the Y signal has an amplitude of
approximately 0.7V and that the burst signal has an amplitude of
approximately 0.3V 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.
Approx. 0.7 V
Approx. 0.3 V
Horizontal sync signal
Fig. 6-2-2 Color Bar Signals of Pattern Generator
Q Q
3
6 7
1 3
2-1-4.
Alignment Tape
• Contents of KRV-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
1 5
0 5
8
2 9
9 4
Period
Video signal
Hi-Fi
Color bar
Monoscope
400Hz
Color bar
(L/R)
Monoscope
m
co
9 9
Approx.
0.3 V
Burst signal
(Should be flat)
2 8
9 9
Audio signal
Normal
400Hz
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