SONY SLVN70
Manual de Servicio

SECTION 6 ADJUSTMENTS
6-1 MECHANICAL ADJUSTMENTS
For the mechanical adjustments, please refer to the �VHS MECHANICAL ADJUSTMENT MANUAL (S MECHANISM)� (9-921-647-11).

SLV-AX10/AX20/N50/N60/N70/N80/ LX4/LX5/LX6S/LX7S/LX8S

2-1-3. Set-up of Adjustment In this adjustment, NTSC pattern generator is connected with LINE input terminal. When check to tuner, connected AERIAL terminal. Check that the synchronizing signal of the Y signal has an amplitude of approximately 0.7 V and that the burst signal has an amplitude of approximately 0.3 V and its waveform is flat. And check that the level ratio of burst signal to �red� signal is 0.30 : 0.66. The video signal (color bar) used for electrical aligning this unit is shown in Fig. 6-2-2.

6-2. ELECTRICAL ADJUSTMENTS
See the adjusting part location diagram from on page 6-6 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 of 30 MHz or more, with delay mode (A probe 10:1 should be used unless otherwise specified.) 3) Frequency counter 4) NTSC Pattern generator 5) 6) 7) 8) 9) 10) Remote commander Digital voltmeter Audio generator Audio level meter Audio attenuator Alignment tapes KRV-51N2 (NTSC) Part No. : 8-192-605-32

NTSC model

White (100%)

About 0.7 V About 0.3 V Red Horizontal sync signal Burst signal (It must be flat.)

About 0.3 V

Fig. 6-2-2 Color Bar Signals of Pattern Generator
2-1-4. Alignment Tape � Contents of KRV-51N2 Audio signal Mode Period 7 minutes 3 minutes 7 minutes 3 minutes Video signal Color bar Monoscope Color bar Monoscope Hi-Fi 400Hz (L/R) Normal 400Hz 1 2 3 4

2-1-2. Equipment Connection Unless otherwise specified, connect and adjust the measuring instruments as shown in the following diagram.
VIDEO LINE IN Pattern generator VCR Monitor TV

SP LP

Video output (75�)

VIDEO LINE OUT

Fig. 6-2-1

6-1