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SLV-495/495PX/675HF/675HFPX/676HF/685HF/695HF/L40CS/L40MX/L40PA/L50CS/L50MX/
L50PA/L60HFCS/L60HFMX/L60HFPA/L70HFCS/L70HFMX/L70HFPA/XS5MX/X6HFMX
SECTION 7
ADJUSTMENTS
7-1
MECHANICAL ADJUSTMENTS
For the mechanical adjustments, please refer to the
"VHS MECHANICAL ADJUSTMENT MANUAL IV
(H MECHANISM)" (9-973-623-11).
7-2. ELECTRICAL ADJUSTMENTS
See the adjusting part location diagram from on page 7-8
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.)
Frequency counter
Pattern generator
Digital voltmeter
Audio generator
Audio level meter
Audio distortion meter
Audio attenuator
Alignment tapes
KRV-51N2
Part No. : 8-192-605-32
10)
2-1-2. Equipment Connection
Unless otherwise specified, connect and adjust the measuring
instruments as shown in the following diagram.
VIDEO LINE IN
Monitor TV
VIDEO LINE OUT
Video output
(75Q)
Fig. 7-2-1.
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:
¢
LCHANNEL | switch
a
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. 7-2-2.
White (100%)
Burst signal
Horizontal sync signal
(It must be flat.)
Fig. 7-2-2. Color Bar Signals of Pattern Generator
2-1-4. Alignment Tape
¢ Contents of KRV-51N2
.
Audio signal
eg
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[Audio signal
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|
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