Adjustments; Mechanical Adjustments; Electrical Adjustments; Pre-Adjustment Preparations - Sony SLV-ED8ME 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) PAL pattern generator
5) Digital voltmeter
6) Audio level meter
7) Audio noise meter
8) Audio generator
9) Attenuator

10) Alignment tape

Part Code: 8-192-605-36 KRV-51P (PAL)
Part Code: 8-192-605-32 KRV-51N2 (NTSC)
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, PAL or 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.
PAL
NTSC
2-1-4. Alignment Tapes
[Alignment Tape (KRV-51N2 / KRV-51P)]
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-ED8/EZ8/EZ9
Fig. 7-2-2
Audio signal
Video signal
(HiFi/Normal)
Color bar
Monoscope
400 Hz
Color bar
Monoscope
: phono jack
: phono jacks