Sony SLV-ED1PL - SECTION 7 ADJUSTMENTS; 7-1. MECHANICAL ADJUSTMENTS; 7-2. ELECTRICAL ADJUSTMENTS

7-1
SECTION 7
ADJUSTMENTS
1
2
3
4
Mode
SP
SP
EP
EP
Video signal
Color bar
Monoscope
Color bar
Monoscope
Audio signal
(HiFi/Normal)
400 Hz
Time
Seven minutes
Three minutes
Seven minutes
Three minutes
7-1. MECHANICAL ADJUSTMENTS
Refer to the SERVICE MANUAL of VHS MECHANICAL AD-
JUSTMENT VI.
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, de-
lay mode, as provided.
3) NTSC pattern generator
4) Digital voltmeter
5) Audio level meter
6) Audio noise meter
7) Audio generator
8) Attenuator
9) Alignment tape
Part Code: 8-192-605-32 KRV-51N2
2-1-2. Connection
Unless otherwise specified, connect and adjust the measuring in-
struments as shown in the following diagram.
During the adjustment, see the Parts Arrangement
Diagram for Adjustments on Page 7-6.
Fig. 7-2-2
2-1-4. Alignment Tapes
[Alignment Tape (KRV-51N2)]
2-1-3. Set-up of Adjustment
In this adjustment, NTSC pattern generator is connected with LINE
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
signal and “red” signal are 0.30: 0.66. Fig. 7-2-2. shows video signals
(color bars) used in adjusting the video section.
Video output
(75 Ω)
Pattern generator VCR
VIDEO LINE IN
Monitor TV
VIDEO LINE OUT
SLV-ED1/ED4/ED7/ED8
2-1-5. Specified I/O Level and Impedance
Input/output terminal
Video inputs LINE IN : phono jack
1 Vp-p, 75 Ω, unbalanced, sync negative
Audio inputs LINE IN : phono jacks
47 kW, –7.5 dBs (0 dBs = 0.775 Vrms)
More than 10 kW, –4 dBs
Video outputs LINE OUT: phono jack
1 Vp-p, 75 Ω, unbalanced, sync negative
Audio outputs LINE OUT: phono jacks
–7.5 dBs at load impedance 47 kΩ
Output impedance : less than 10 Ω
Fig. 7-2-1