JVC PD-42DX/K Service Manual
52090200303
SERVICE MANUAL
PDP COLOUR TELEVISION
BASIC CHASSIS
PD-42DX
/K
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. MAIN PARTS LOCATION
3. INSPECTION OF COMPONENTS ON THE PW BOARD
4. DISASSEMBLY PROCEDURE
5. CONFIRMING REFERENCE VOLTAGE
6. ADJUSTMENTS
7. PARTS LIST
㨯
SB3
2
2
3
6
8
9
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 connecto r,
or a flat wire and a point-of-contact part enough.
COPYRIGHT © 2004 Victor Company of Japan, Limited
No.YA002B
2004/6
عCONFIRMING 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.
SERIAL NO.
211200192
Vd=65V
Vs=190.1V
CODE AA-01
For example
CODE : AA
Model name and serial No.
NEC NP42D2MF01AA
211200192
*******************
*******************
*******************
For example
Model : NP42D2MF01AA
Serial No. : 211200192 (9 figures)
عMAIN PARTS LOCATION
COMMON PWB
Flexible cable
Common-side A
Flexible cable
Common-side B
Flexible cable
Common-side C
SIGNAL RELAY PWB(left)
ABCDEFGHIJKLMNOP
COMMON BRANCH PWB
DIGITAL PWB
SIGNAL RELAY PWB(right)
Heat-sink
SCAN RELAY PWB(upper)
HIGH VOLTAGE
PWB
Flexible cable
Scan-side A
Flexible cable
Scan-side B
Flexible cable
Scan-side C
Flexible cable
Scan-side D
SCAN RELAY
PWB(lower)
2(No.YA002B)
عINSPECTION 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
㧲
OK: Short
NG: Open
㧲
㧲㨁
OK: Short
NG: Open
1.3 Fuse resistances (R10, R4, R6) and chip fuse (R20)
on the HIGH VOLTAGE PWB
R10
OK: Approx. 2.2ǡ
NG: Open
R10
R4
R20
R4
OK: Approx. 2.2ǡ
NG: Open
R6
R6
OK: Approx. 2.2ǡ
NG: Open
R20
OK: Approx. 10ǡ
NG: Open
R1
OK: Approx. 2.2ǡ
R1
NG: Open
1.4 Fuse resistances (R7, R3) and chip fuse (R9)
on the HIGH VOLTAGE PWB
R7
R3
OK: Approx. 2.2ǡ
NG: Open
R3
OK: Approx. 2.2ǡ
R7
NG: Open
R9
R9
OK: Approx. 10ǡ
NG: Open
1.6 Fuse resistance (R2) on the HIGH VOLTAGE PWB1.5 Fuse resistance (R1) on the HIGH VOLTAGE PWB
R2
R2
OK: Approx. 2.2ǡ
NG: Open
1.7 Fuse resistance (R90) on the HIGH VOLTAGE PWB
R90
OK: Approx. 2.2ǡ
R90
NG: Open
(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 connecto r [CN12] on the SIGNA L RELAY PWB (right ) and check the conductio n between the pin 1 (or
pin 2) and the ground.
In cas e of "short" , on e of the dat a IC s connectin g the SIGNA L REL AY PWB may be defective , and yo u 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)
Loading...