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)
3.1 PH2203F on the HIGH VOLTAGE PWB
Turn over the board and check each point of power IC as shown below.
PH2203F
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
U
T
S
R
Check point
Between
A - B
A - U
B - C
B - E
B - M
B - N
Between
C - U
F - U
G - H
H - J
I - J
J - K
Between
J - O
L - M
P - T
Q - T
OK: Over 1kǡ
NG: Short
U
A
B
C
D
E
F
G
H
PH2203F
I
J
K
L
M
N
T
O
S
R
P
Q
4. Inspection of scan IC drivers
According to the following procedures, measure with a circuit tester and check OK or NG.
4.1 Scan IC driver on the SCAN RELAY PWB (upper right) 4.2 Scan IC driver on the SCAN RELAY PWB (lower right)
NEGA 1
POSI 2
POSI 1
NEGA 2
Check point
Between NEGA - POSI
OK: Over 1kǡ
NG: Short
Check point
Between NEGA - POSI
OK: Over 1kǡ
NG: Short
(No.YA002B)5
عDISASSEMBLY PROCEDURE
1. Removing the COMMON PWB
(1) Detach the 3 connectors.
(2) Remove the 8 screws [A].
(3) Remove the COMMON PWB.
(1) Detach the 10 connectors.
(2) Remove the 4 screws [D].
(3) Remove the SIGNAL RELAY PWB (left).
2. Removing the DIGITAL PWB
(1) Detach the 6 connectors.
(2) Remove the 6 screws [B].
(3) Remove the DIGITAL PWB.
3. Removing the HIGH VOLTAGE PWB
(1) Detach the 5 connectors.
(2) Remove the 22 screws [C].
(3) Remove the HIGH VOLTAGE PWB.
4. Removing the SIGNAL RELAY PWB (left)
Note : Removing the heat-sink in advance
is required. Refer to the following page
to remove the heat-sink.
B
COMMON
PWB
A
COMMON BRANCH PWB
5. Removing the SIGNAL RELAY PWB (right)
(1) Detach the 13 connectors.
(2) Remove the 5 screws [E].
(3) Remove the SIGNAL RELAY PWB (right).
6. Removing the SCAN RELAY PWB (upper)
(1) Detach the 5 connectors.
(2) Remove the 8 screws [F].
(3) Remove the SCAN RELAY PWB (upper).
7. Removing the SCAN RELAY PWB (lower)
(1) Detach the 5 connectors.
(2) Remove the 8 screws [G].
(3) Remove the SCAN RELAY PWB (lower).
C
SCAN RELAY PWB (upper)
F
SIGNAL
RELAY
PWB
(left)
HIGH VOLTAGE
PWB
DIGITAL PWB
Heat-sink
: connector
D
SIGNAL RELAY PWB (right)
E
Note : Check the state of the detached cables and connectors.
(1) Check any dirt or peeling in the contact part of the flat cable, and any crack, crease, disconnection
and short-circuit of wires.
(2) Check any foreign substance in the connector's contact .
(3) Check the state of plugging the flat cable into the connector, and confirm it locks completely.
G
SCAN
RELAY
H
PWB
(lower)
6(No.YA002B)
Fig. 1
Fig. 2
Fig. 3
REMOVING THE HEAT SINK
(1) Remove the 11 screws [H] shown in the previou s page .
(2) Slowly, as shown in Fig.1 and Fig.2, shake up and down
repeatedl y and remov e the heat-sin k with care. (Fig.3 )
Note :
(1) The silicon e shee t is stuc k on th e bac k
ޓof the heat-sink, and if it tears off forcibly,
ޓther e i s a possibilit y of damagin g th e
ޓdata TCP tips.
(2) Do not give stres s to the fin of the heat ޓsink and data TCP.
(3) Hol d no t th e fi n of the heat-sin k but the
ޓbase board. (Fig.4)
Fig. 4
(No.YA002B)7
عCONFIRMING REFERENCE VOLTAGE
Each PDP panel has the characteristic voltage value.
In the adjustment after fix or exchange of a PW board,
this voltage value is used as reference.
You can get it from the vendor's web site on the Internet.
1. Getting the characteristic voltage value of the PDP panel
1.1 Access the following address by the Web browser of
ޓyour PC.
http://203.126.119.92/necpd/
1.2 After [NEC-ITLS] screen is displayed, click "Click here
ޓto log on to NPD". (Fig. 1)
1.3 Type the following user name and password into the
ޓdialog box and click "Enter" button. (Fig. 2)
Username: JVCJPN01
Password: jvckoseki (lower-case)
1.4 After [WELCOME TO NEC-ITLS] is displayed (Fig. 3),
ޓޓclick the "Voltage" icon in the "Enquiry" holder on the
ޓupper left part of the window. (Fig. 4)
1.5 After [VOLTAGE ENQUIRY] is displayed (Fig. 5), enter
ޓޓthe panel ID number, which is shown on the panel
ޓޓ(refer to page 2), into the dialog box and click "GO".
Fig. 1
1.6 Then, the characteristic voltage value will be displayed.
ޓޓ(Fig. 6)
Fig. 5
Fig. 2
Fig. 3
8(No.YA002B)
Fig. 6
Fig. 4
عADJUSTMENTS
Item
Vsw / -Vw
VOLTAGE
ADJUSTMENT
Measuring
instrument
Test point Adjustment part Description
DC voltmeter TP328 (Vsw)
TP330 (-Vw)
GND
[HIGH VOLTAGE
PWB]
VR2 (Vsw)
VR4 (-Vw)
[HIGH VOLTAGE
PWB]
VR4(-Vw)
(1) Measure the voltage between TP328 and
GND on the HIGH VOLTAGE PWB.
(2) Adjust the voltage same as the reference
data of Vsw shown in web site by VR2.
The adjustment accuracy is within r0.5V.
(3) Measure the voltage between TP330 and
GND on the HIGH VOLTAGE PWB.
(4) Adjust the voltage same as the reference
data of -Vw shown in web site by VR4.
The adjustment accuracy is within r0.5V.
VR2(Vsw)
TP328(Vsw)
TP330(-Vw)
Vbw / Vp
VOLTAGE
ADJUSTMENT
DC voltmeter TP327 (Vbw)
TP329 (Vp)
TP330
GND
[HIGH VOLTAGE
PWB]
VR1 (Vbw)
VR3 (Vp)
[HIGH VOLTAGE
PWB]
VR3 (Vbw)
(1) Measure the voltage between TP329 and
TP330 on the HIGH VOLTAGE PWB.
(2) Adjust the voltage same as the reference
data of Vbw shown in web site by VR3.
The adjustment accuracy is within r0.5V.
(3) Measure the voltage between TP327 and
GND on the HIGH VOLTAGE PWB.
(4) Adjust the voltage same as the reference
data of Vp shown in web site by VR1.
The adjustment accuracy is within r1.5V.
VR1 (Vp)
TP327(Vp)
TP329(Vbw)
TP330
(No.YA002B)9
عPARTS LIST
5
PDP UNIT
2
1
6
Ref No. CODE
1
2
3
4
5
6
7
8
8
AA, CA, DA
AA, CA, DA
AA, CA, DA
AA, CA, DA
AA, CA, DA
AA, CA, DA
AA, CA, DA
AA, CA
#$%&'()* +,-./0 12
Parts No.
NE-9S899452
NE-9S899418
NE-9S899597
NE-9S899269
NE-9S899271
NE-9S899358
NE-9S899276
NE-9S899281
NE-9S899619
NE-9S899412
NE-9S899620
NE-9S899260
Heat-sink
3
Parts name
HIGH VOLTAGE PWB
COMMON BRANCH PWB
SIGNAL RELAY PWB
SIGNAL RELAY PWB
COMMON PWB
SCAN RELAY PWB
SCAN RELAY PWB
DIGITAL PWB
4
Latest version
01C
03A
01B
01B
01B
01A
01E
01E
08A-02
08A-04
08A-06
02A-02
7
Compatible version
01A
(left)
(right)
(upper)
(lower)
08A-00, 08A-01
01A-01, 01A-02, 02A-01
DA
NOTE(1)Please check a code number with the seal stuck on the rear side
of the PDP panel.
(2)Version is indicated by the seal stuck on each PW board.
ޓ
NE-9S899436
NE-9S899493
NOTES AT THE TIME OF PW BOARD EXCHANGE
It will becom e the cause of failure if dust adhere s to the inside of a connecto r, 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.
10(No.YA002B)
02A-05
02A-06
01A
FK2600686
The written example of
the seal on a PWB
Indication of Version
(No.YA002B)11
Victor Company of Japan, Limited
AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEG ORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan
(No.YA002B)
Printed in Japan
WPC
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