Sony LX40, LX70S Mechanical Adjustments, Electrical Adjustments, Preparation Before Adjustment

SLV-LX40/LX50/LX60S/LX70S

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).

6-2. ELECTRICAL ADJUSTMENTS

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.

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

NTSC model

About 0.7 V

About 0.3 V

White (100%)

Red

About 0.3 V

Burst signal

4)	NTSC Pattern generator
5)	Remote commander
6)	Digital voltmeter

Horizontal sync signal

(It must be flat.)

7)	Audio generator
8)	Audio level meter
9)	Audio attenuator
10)	Alignment tapes
	KRV-51N2 (NTSC) Part No. : 8-192-605-32

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
Video output	VIDEO LINE OUT
(75Ω)
	Fig. 6-2-1

Fig. 6-2-2 Color Bar Signals of Pattern Generator

2-1-4. Alignment Tape

•Contents of KRV-51N2

	Mode	Period	Video signal	Audio signal
				Hi-Fi	Normal
1	SP	7 minutes	Color bar
				400Hz
2		3 minutes	Monoscope		400Hz
				(L/R)
3	LP	7 minutes	Color bar
4		3 minutes	Monoscope

6-1