JVC PD-42DX/K Service Manual

SERVICE MANUAL

PDP COLOUR TELEVISION

200352 90

PD-42DX/K

BASIC CHASSIS

SB3

Supplementary

These models corresponded to the printed circuit board exchange in the PDP panel. Therefore, this service manual describes only the information relevant to it.

For details other than those described in this manual, please refer to the PD-42DX/K service manual (No.YA002 2003/9).

TABLE OF CONTENTS

1.	CONFIRMING THE MODEL NAME, SERIAL NUMBER, ID NUMBER AND CODE NUMBER	2
2.	MAIN PARTS LOCATION	2
3.	INSPECTION OF COMPONENTS ON THE PW BOARD	3
4.	DISASSEMBLY PROCEDURE	6
5.	CONFIRMING REFERENCE VOLTAGE	8
6.	ADJUSTMENTS	9
7.	PARTS LIST	10

NOTES AT THE TIME OF PW BOARD EXCHANGE

It will become the cause of failure if dust adheres to the inside of a connector, or a flat wire and a point-of-contact part.

When the PW board is exchanged , be careful of the dust and dirt of the inside of a connector, or a flat wire and a point-of-contact part enough.

COPYRIGHT © 2004 Victor Company of Japan, Limited	No.YA002B
	2004/6

CONFIRMING MODEL NAME, SERIAL NUMBER, ID NUMBER AND CODE NUMBER

NOTE : The panel's ID number is used when you reference the characteristic voltage value of the panel on web site.

PANEL ID No. 212211041621

(12 figures)

Voltage and CODE No.

Model name and serial No.

SERIAL NO.

211200192

NEC NP42D2MF01AA

Vd=65V

211200192

Vs=190.1V

*******************

CODE AA-01

*******************

*******************

For example

For example

CODE : AA

Model : NP42D2MF01AA

Serial No. : 211200192 (9 figures)

MAIN PARTS LOCATION

Flexible cable Common-side A

Flexible cable Common-side B

Flexible cable Common-side C

			SCAN RELAY PWB(upper)
COMMON PWB							Flexible cable
							Scan-side A

COMMON BRANCH PWB

Flexible cable

HIGH VOLTAGE Scan-side B PWB

	DIGITAL PWB	Flexible cable
		Scan-side C

Flexible cable

Scan-side D

SIGNAL RELAY PWB(left)

SIGNAL RELAY PWB(right)

Heat-sink

SCAN RELAY

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

PWB(lower)

2(No.YA002B)

INSPECTION OF COMPONENTS ON THE PW BOARD

Diagnose the PW board in PDP unit by checking defects based on the following items.

1. Inspection of fuses

Measure the resistance of each fuse with a circuit tester, and check OK or NG.

1.1 Glass fuses (F301, F302) on the HIGH VOLTAGE PWB					1.2 Chip fuse (FU801) on the DIGITAL PWB
			OK: Short					OK: Short
			NG: Open					NG: Open

1.3Fuse resistances (R10, R4, R6) and chip fuse (R20) on the HIGH VOLTAGE PWB

R10

OK: Approx. 2.2

NG: Open

		R4			R4
					OK: Approx. 2.2
R10
				R20
					NG: Open

R6

OK: Approx. 2.2

R6

NG: Open

R20

OK: Approx. 10

NG: Open

1.5 Fuse resistance (R1) on the HIGH VOLTAGE PWB

1.4Fuse resistances (R7, R3) and chip fuse (R9) on the HIGH VOLTAGE PWB

						R7
						OK: Approx. 2.2
				R3
						NG: Open
						R3
						OK: Approx. 2.2
		R7				NG: Open
						R9
R9						OK: Approx. 10
						NG: Open

1.6 Fuse resistance (R2) on the HIGH VOLTAGE PWB

						R2
		R1		R2
						OK: Approx. 2.2
		OK: Approx. 2.2
						NG: Open
R1
		NG: Open

1.7 Fuse resistance (R90) on the HIGH VOLTAGE PWB

		R90
		OK: Approx. 2.2
		NG: Open
R90

(No.YA002B)3

2. Inspection of data ICs

According to the following procedures, measure with a circuit tester and check OK or NG.

Check the pin 1 or pin 2 of the connector [CN12] on the SIGNAL RELAY PWB (right).

OK: Open

NG: Short

Detach the connector [CN12] on the SIGNAL RELAY PWB (right) and check the conductio n between the pin 1 (or pin 2) and the ground.

In case of "short" , one of the data ICs connectin g the SIGNA L RELAY PWB may be defective , and you shoul d check whether there is any trace of damage on the data IC's surface after removing the heat-sink on the data IC.

3. Inspection of power IC

According to the following procedures, measure with a circuit tester and check OK or NG.

The allocation of power IC to be checked is shown below.

HIGHT VOLTAGE PWB

PH2203F

4(No.YA002B)