Adjustments; Mechanical Adjustments; Electrical Adjustments; Pre-Adjustment Preparations - Sony SLV-ED1PL Service Manual

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 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.
VIDEO LINE IN
Pattern generator
Video output
(75 Ω)
Fig. 7-2-1
SECTION 7

ADJUSTMENTS

VCR Monitor TV
VIDEO LINE OUT

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.
2-1-4. Alignment Tapes
[Alignment Tape (KRV-51N2)]
Mode Time
1 SP Seven minutes
2 SP Three minutes
3 EP Seven minutes
4 EP Three minutes
2-1-5.

Specified I/O Level and Impedance

Input/output terminal
Video inputs LINE IN
1 Vp-p, 75 Ω, unbalanced, sync negative
Audio inputs LINE IN
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
7-1
SLV-ED1/ED4/ED7/ED8
Fig. 7-2-2
Audio signal
Video signal
(HiFi/Normal)
Color bar
Monoscope
400 Hz
Color bar
Monoscope
: phono jack
: phono jacks