Pioneer PDP-501MX 현장 서비스 매뉴얼 - 페이지 23

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Procedure

Adjusting Item

, V

SUS

OFS

ADR

, V

voltage

CSP

adjustment

If the U-COM assembly has been replaced, mount the former EEPROM (IC3704 24LC64 (I) SN) in the new U-COM assembly.

Note: CSP, GNDH_A, and GNDH_B differ from the GND potential in the unit. The GND potentials are also different each other.

• The adjustment tolerance of the drive voltage label is

• The adjustments of the ANALOG VIDEO ASSEMBLY (step 1), (step 2), (step 3), (step 4), (step 5), and (step 6) is not necessary when

replacing this assembly.

• Adjusting points which need not be adjusted again in the unit after replacing other assemblies are as follows.

SW power supply

• If the above adjustment controls are rotated by mistake, adjust to the following values;

RV8 (+5V): Adjust the DC voltage between TP CH16 (5V) and TP CH19 (5V GND) to 5.0V

RV6 (+3.3V): Adjust the DC voltage between TP CH17 (3.3V) and TP CH19 (5V GND) to 3.3V

RV2 (+12V): Adjust the DC voltage between TP CH18 (12V) and TP CH19 (5V GND) to 12.0V

RV1 (+5VSTB): Adjust the DC voltage between TP CH4 (5V) and TP CH19 (5V GND) to 5.0V

White Balance Adjustment

Set COLOUR to minimum and the other video settings to the

standard setting in the following measurements.

1. Black level adjustment

1) Input the RAMP signal.

2) Monitor the output TP terminals of the RGB assembly (R:P5802,

G:P5801, B:P5803), and adjust R,G,B LOW LIGHT so that the

black level (0IRE) becomes 2.6V.

2. LOW LIGHT adjustment

Input the RAMP signal, and adjust R, G, B:LOW LIGHT so that

the point which starts to light up becomes gray.

3. HIGH LIGHT adjustment

1) Input the RAMP signal.

2) Monitor the TP terminals of the RGB assembly (R:P5802,

G:P5801, B:P5803), and adjust R,G,B HIGH LIGHT so that the

white level (100IRE) becomes 4.4V.

3) Input the white signal (80IRE).

4) Adjust R,G,B HIGH LIGHT so that the screen becomes reddish

white (T=7200K, dev=0.000uv).

4. Adjusting voltage check

Input the RAMP signal, monitor the TP terminals of the RGB

assembly (R:P5802, G:P5801, B:P5803), and check that the black

level (0IRE) is 2.6V

0.1. The white level (100IRE) value is not

specified.

Input Signal

Adjusting Point

RV7, RV5,

RV3, RV4,

100% white signal

RV9 (

0.5V.

RV8 (+5V)

RV6 (+3.3V)

RV2 (+12V)

RV1 (+5VSTB)

(Sustain power supply voltage)

SUS

Check the drive voltage label value at the upper left side of the

unit inside, and adjust RV7 so that the value between TP CH24

(175V) and TP-CH25 (175 GND) becomes that value.

(Offset power supply voltage)

OFS

Check the drive voltage label value at the upper left side of the

unit inside, and adjust RV5 so that the value between Pin 1 of

CN3106 (150V) and Pin 4 of CN3105 (SUS, GND) inside the Y

drive assembly becomes that value.

(Address power supply voltage)

ADR

)

Check the drive voltage label value at the upper left side of the

unit inside, and adjust RV3 so that the value between TP CH22

(30V) and TP-CH23 (30V GND) becomes that value.

(CSP power supply voltage)

CSP

Check the drive voltage label value at the upper left side of the unit

inside, and adjust RV4 so that the potential between Pin 4 (CSP)

and Pin 1 (150V) of CN3106 of the Y drive assembly becomes

that value.

(Minus reset power supply voltage)

Check the drive voltage label value at the upper left side of the

unit inside, and adjust RV9 so that the value between TP CH26

(190V) and TP CH25 (175 GND) becomes that value.

(Reference)

Adjustment values using the Minolta colour-difference meter

CA-100

80% window step 0dB

[NTSC] [HDTV]

x=300

y=315

Y=58

15cd/m

20% 4.0cd/m

(NTSC)

3.0cd/m

(HDTV)

Checking picture quality

1. Face colour check (Colour balance check)

After adjusting the white balance, check the face colour of figures

in LD still pictures.

If the colour is not natural, adjust COLOUR and TINT and

memorize the value.

2. Picture quality check

Set the sharpness to 120 for both NTSC and HDTV, and the detail

setting to 70 for NTSC and 65 for HDTV, and check the picture

quality.

Note: Adjust the white balance and check the picture quality in each

NTSC screen mode (natural wide, zoom, etc.) and HDTV

(MUSE).

PDP-501MX

Adjusting Method

0.1V.

0.066V.

0.24V.

0.1V.

[RGB]

x=290

y=315

Y=35

10cd/m

(20% 2.5cd/m

)