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7-1. MECHANICAL ADJUSTMENTS
7-2. ELECTRICAL ADJUSTMENTS
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 tape
MH-2
Part No. : H7099052H
2-1-2.
Equipment Connection
Unless otherwise specified, connect and adjust the measuring
instruments as shown in the following diagram.
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:
• switch
……………………………LINE
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.
Fig. 7-2-2. Color Bar Signals of Pattern Generator
2-1-4.
Alignment Tape
• Contents of MH-2 (H7099052H)
Mode
Period
Video signal
Audio signal
1
10 minutes
Stair step
7kHz
2
SP
5 minutes
—
3kHz
3
10 minutes
Color bar
1kHz
4
3 minutes
RF sweep
—
CHANNEL
SECTION 7
ADJUSTMENTS
7-1
SLV-E160EE/E290EE/E290EG/E410AP/E410CP
E410EE/E410EX/E410IT/E410UX/E410VP
For the mechanical adjustments, please refer to the
"VHS MECHANICAL ADJUSTMENT MANUAL
"VHS MECHANICAL ADJUSTMENT MANUAL
4
(H MECHANISM)" (9-973-623-11).
See the adjusting part location diagram from on page 7-6
for the adjustment.
for the adjustment.
Pattern generator
Video output
(75
Ω
)
VIDEO LINE IN
VCR
VIDEO LINE OUT
Monitor TV
Approx. 0.7 V
Red
Horizontal sync signal
Burst signal
(Should be flat.)
(Should be flat.)
Approx.
0.3 V
0.3 V
White (Approx. 75%)
Approx. 0.3 V
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