Sony RMT-V267B, Service Manual

Page: 65 / 91

6-1
SLV-999HF/M11HF/M91HF
SECTION 6
ADJUSTMENTS
6-1. MECHANICAL ADJUSTMENT
For the mechanical adjustments, please refer to the
“VHS MECHANICAL ADJUSTMENT MANUAL
S MECHANISM ” (9-921-647-11).
6-2. ELECTRICAL ADJUSTMENT
See the adjusting part location diagram from on page 6-8 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 above 30 MHz with delay
mode (Unless specified otherwise, use a 10 : 1 probe.)
3) Frequency counter
4) NTSC pattern generator
5) Remote commander
5) Digital voltmeter
6) Audio generator
7) Audio level meter
8) Audio distortion meter
9) Audio attenuator
10) Alignment tape
KRV-51N2 (NTSC) Part No.: 8-192-605-32
11) Camcoder with LASER LINK function
2-1-2. Equipment Connection
Unless specified otherwise, connect the measuring instrument as
shown in the following diagram.
Fig. 6-2-1
LINE-1 IN VIDEO
LINE OUT
Video output
(75
Ω
)
Pattern generator VCR Monitor TV
2-1-3. Setup for adjustment
Because the video signal obtained from the pattern generator is used
as the adjustment signal for adjustments, the video output signal
must satisfy the given specification.
Connect the oscilloscope to VIDEO LINE-1 IN terminal, and check
that the amplitude of sync signal is approximately 0.286 V, the
amplitude of the video section is approximately 0.714 V and the
amplitude of burst signal is approximately 0.286 V.
The video signal used for adjustments is shown in Fig. 6-2-2.
Fig. 6-2-2. Color Bar Signal of Pattern Generator
2-1-4. Alignment Tape
• Contents of KRV-51
1 V
0.714 V
0.286 V
White (75%)
White (100%)
Y
ello
w
Cy
an
Green
Magenta
Red
Blue
Burst signal
0.286 V
Q
I
Horizontal sync signal
1
2
3
4
Mode
SP
LP
Period
7 minuted
3 minuted
7 minuted
3 minuted
Video Signal
Color bar
Monoscope
Color bar
Monoscope
Audio Signal
Hi-Fi Normal
400 Hz 400 Hz
(L/R)