Sony SLV-286EE - Adjustments; Electrical Adjustments

SLV-286EE/436EE/X311PS/SG/
X7T1IAS/ME/NZ/PS/SG
SECTION 7
ADJUSTMENTS
During the adjustment, see the Parts Arrangement
Diagram for adjustments on Page 7-6.
7-1. MECHANICAL ADJUSTMENTS
Refer to the SERVICE MANUAL of VHS MECHANICAL
ADJUSTMENT I.
7-2. ELECTRICAL ADJUSTMENTS
2-1. PRE-ADJUSTMENT PREPARATIONS
Necessary items and indications for total adjustment of electric
circuit of this machine will be described in this chapter.
2-1-1. Instruments to be Used
1) Color TV
2) Oscilloscope 1 or 2 phenomena, band more than 30 MHz,
delay mode, as provided.
Frequency counter (min. 8 digits)
PAL, SECAM pattern generator
Digital voltmeter
Audio level meter
Audio generator
Attenuator
Alignment tape
Part Code: H7099052H (MH-2)
Extension cables (See page 7-2 for using location)
3)
4)
5)
6)
7)
8)
9)
10)
= _
| it FFC cable 7 I Type @ form
tJ
@_ RV-33 (CNOO1) + MA-203 (CN801)
(14 pins J-6090-044-A)
@ _ RV-33 (CN002) @ MA-203 (CN802)
(20 pins J-6090-043-A)
7-1
2-1-2. Connection
Unless otherwise specified, connect and adjust the measuring
instruments as shown in the following diagram.
VIDEO LINE IN 1
Pattern generator Monitor TV
Video output
(75 Q)
VIDEO LINE OUT
Fig. 7-2-1.
2-1-3. Set-up Adjustment
In this adjustment, PAL pattern generator is connected with LINE
1 input signal terminal. When check to tuner, connected AERIAL
terminal. Check that the amplitudes of video signal SYNC signal,
of picture portions, and of burst signals are flat at approximately
0.3, 0.7 and 0.3 V, respectively, and that the level ratio of the
burst sigal and “red” signal are 0.30 : 0.66. Fig. 7-2-2. shows
video signals (color bars) used in adjusting the video section.
White (approx. 100%)
Burst signal
(To be flat)
Horizontal sync signal
Fig. 7-2-2.
2-1-4. Alignment Tape (MH-2)
[time [Video signal [Audio sal _]
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fe [ Sminues [RF eweep | —