Electrical Adjustment; Tft Lcd Adjustment; Power Measuring; Vcom Waveform Adjustment - Sony DVP-FX705 Service Manual

Portable cd/dvd player

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Operating instructions manual (55 pages)

Specifications (2 pages)

Service manual (95 pages)

Table Of Contents

Table of Contents

In making adjustment, refer to 8-3. Adjustment

and Checking Location.

This section describes procedures and instructions necessary for

adjusting electrical circuits in this set.

Instruments required:

1) Color monitor TV

2) Oscilloscope 1 or 2 phenomena, band width over 100 MHz,

with delay mode

3) Frequency counter (over 8 digits)

4) Digital voltmeter

5) Standard commander (RMT-D163A)

6) DVD reference disc

HLX-501 (J-6090-071-A) (dual layer) (NTSC)

HLX-503 (J-6090-069-A) (single layer) (NTSC)

HLX-504 (J-6090-088-A) (single layer) (NTSC)

HLX-505 (J-6090-089-A) (dual layer) (NTSC)

SECTION 8

ELECTRICAL ADJUSTMENT

8-1. TFT LCD ADJUSTMENT

1. POWER MEASURING

Measure each power after power supply

TFT-LCD Board

Measurement point

L807

L806

L810

2. VCOM WAVEFORM ADJUSTMENT

A. Adjust the VCOM Vpp level while changing the VR801 as be-

B. Adjust the VCOM DC Offset level while changing the VR803

Vcom Waveform

GND

3. TFT PANEL CHECK

Check that there is no big difference to color of image between

LCD Screen and TV monitor (LINE output).

And Use the "COLOR" adjustment (On LCD Screen) of "COLOR/

BRIGHT" button on the KEY Board.

Check the color depth of LCD screen is changed.

8-1

Specification

–15V

+17V

+8.25V

low waveform by using the scope in the TP8F2.

as below waveform by using the scope in the TP8F2.

3.8V

-0.8V

Figure 8-1

DVP-FX705

59.0 µs

4.6Vp-p