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MENU/ENTER DOWN
VOLUME
UP LEFT/- RIGHT/+
INPUT SELECT
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ORDER NO.
ARP3438
PDP-42MXE20

PLASMA DISPLAY

PDP-42MXE20
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model Type Power Requirement Remarks
PDP-42MXE20 TYVXK5 AC100 to 240 V

This service manual should be used together with the following manual(s).
Model No. Order No. Remarks
PDP-425CMX/LUC5, 42MXE10 ARP3340 EXPLODED VIEWS, BLOCK DIAGRAM, PCB PARTS LIST etc.
PDP-425CMX/LUC5, 42MXE10 ARP3341 SCHEMATIC DIAGRAM, PCB CONNECTION DIAGRAM

For details, refer to "Important Check Points for good servicing".

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
PIONEER CORPORATION 2007
T-ZZR JAN. 2007 printed in Japan
1 2 3 4

SAFETY INFORMATION

A
Leakage Current Cold Check PRODUCT SAFETY NOTICE
With the AC plug removed from an AC power source, place a Many electrical and mechanical parts in PIONEER set have
jumper across the two plug prongs. Turn the AC power switch on. special safety related characteristics. These are often not evident
Using an insulation tester (DC 500V), connect one lead to the from visual inspection nor the protection afforded by them
jumpered AC plug and touch the other lead to each exposed metal necessarily can be obtained by using replacement components
part (input/output terminals, screwheads, metal overlays, control rated for higher voltage, wattage, etc. Replacement parts which
shafts, etc.), particularly any exposed metal part having a return have these special safety characteristics are identified in this
path to the chassis. Exposed metal parts having a return path to Service Manual.
the chassis should have a minimum resistor reading of 4M. The Electrical components having such features are identified by
below 4M resistor value indicate an abnormality which require marking with a on the schematics and on the parts list in this
corrective action. Exposed metal parts not having a return path to Service Manual.
B the chassis will indicate an open circuit. The use of a substitute replacement component which dose not
have the same safety characteristics as the PIONEER
Leakage Current Hot Check recommended replacement one, shown in the parts list in this
Plug the AC line cord directly into an AC power source (do not Service Manual, may create shock, fire or other hazards.
use an isolation transformer for this check). Product Safety is continuously under review and new instructions
Turn the AC power switch on. are issued from time to time. For the latest information, always
U s i n g a " L e a k a g e C u r r e n t Te s t e r ( S i m p s o n M o d e l 2 2 9 consult the current PIONEER Service Manual. A subscription to,
equivalent)", measure for current from all exposed metal parts of or additional copies of, PIONEER Service Manual may be
the cabinet (input/output terminals, screwheads, metal overlays, obtained at a nominal charge from PIONEER.
control shaft, etc.), particularly any exposed metal part having a
return path to the chassis, to a known earth ground (water pipe,
conduit, etc.). Any current measured must not exceed 1mA.
C

Reading should
Leakage not be above
Device current 4mA
under tester
test
Test all
exposed metal
surfaces

D

Also test with
plug reversed Earth
(Using AC adapter ground
plug as required)

AC Leakage Test
A N Y M E A S U R E M E N T S N OT W I T H I N T H E L I M I T S
OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL
SHOCK HAZARD AND MUST BE CORRECTED BEFORE
RETURNING THE SET TO THE CUSTOMER.
E

F

2 PDP-42MXE20
1 2 3 4
5 6 7 8

A
[Important Check Points for Good Servicing]
In this manual, procedures that must be performed during repairs are marked with the below symbol.
Please be sure to confirm and follow these procedures.
1. Product safety
Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by
following the safety instructions described in this manual.

1 Use specified parts for repair.

Use genuine parts. Be sure to use important parts for safety.

2 Do not perform modifications without proper instructions.
B
Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as
radio/TV interference and foreign noise.

3 Make sure the soldering of repaired locations is properly performed.

When you solder while repairing, please be sure that there are no cold solder and other debris.
Soldering should be finished with the proper quantity. (Refer to the example)

4 Make sure the screws are tightly fastened.

Please be sure that all screws are fastened, and that there are no loose screws.

5 Make sure each connectors are correctly inserted.

Please be sure that all connectors are inserted, and that there are no imperfect insertion.
C
6 Make sure the wiring cables are set to their original state.

Please replace the wiring and cables to the original state after repairs.
In addition, be sure that there are no pinched wires, etc.

7 Make sure screws and soldering scraps do not remain inside the product.

Please check that neither solder debris nor screws remain inside the product.

8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.

Damaged power cords may lead to fire accidents, so please be sure that there are no damages.
If you find a damaged power cord, please exchange it with a suitable one.

9 There should be no spark traces or similar marks on the power plug.
D
When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure
connections and suitable usage. Please exchange the power cord if necessary.

0 Safe environment should be secured during servicing.

When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries.
Please pay attention to your surroundings and repair safely.

2. Adjustments
To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.
Adjustments should be performed in accordance with the procedures/instructions described in this manual.

3. Lubricants, Glues, and Replacement parts E

Use grease and adhesives that are equal to the specified substance.
Make sure the proper amount is applied.

4. Cleaning
For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper
cleaning should be performed to restore their performances.

5. Shipping mode and Shipping screws
To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be
installed before shipment. Please be sure to follow this method especially if it is specified in this manual. F

PDP-42MXE20 3
5 6 7 8
1 2 3 4

CONTENTS
1. CONTRAST OF MISCELLANEOUS PARTS .................................................................................................... 5
1.1 CONTRAST TABLE.................................................................................................................................... 5
A
1.2 CONTRAST OF PCB ASSEMBLIES ......................................................................................................... 8
2. BLOCK DIAGRAM .......................................................................................................................................... 16
2.1 OVERALL CONNECTION DIAGRAM (1/2) ............................................................................................. 16
2.2 OVERALL CONNECTION DIAGRAM (2/2) ............................................................................................. 18
3. DIAGNOSIS INFORMATION .......................................................................................................................... 20
3.1 THE FLOW OF DIAGNOSIS .................................................................................................................... 20
4. GENERAL INFORMATION ............................................................................................................................. 21
4.1 DIAGNOSIS ............................................................................................................................................. 21
5. ADJUSTMENT ............................................................................................................................................... 22
5.1 ADJUSTMENT REQUIRED WHEN THE SET IS REPAIRED OR REPLACED ....................................... 22
5.2 SERVICE MENU LIST ............................................................................................................................. 23
5.3 SERVICE MENU ...................................................................................................................................... 24
B 5.4 FACTORY MODE..................................................................................................................................... 26
6. SPECIFICATIONS .......................................................................................................................................... 28
7. SCHEMATIC DIAGRAM ................................................................................................................................. 30
7.1 MAIN ASSY [CPU BLOCK] (1/13) ........................................................................................................... 30
7.2 MAIN ASSY [Interface BLOCK] (2/13) ..................................................................................................... 32
7.3 MAIN ASSY [Interface B BLOCK] (3/13).................................................................................................. 34
7.4 MAIN ASSY [RGB H/V select A BLOCK] (4/13) ...................................................................................... 36
7.5 MAIN ASSY [RGB H/V select B BLOCK] (5/13) ...................................................................................... 38
7.6 MAIN ASSY [VIDEO SLOT OE BLOCK] (6/13) ....................................................................................... 40
7.7 MAIN ASSY [A/D A BLOCK] (7/13) ......................................................................................................... 42
7.8 MAIN ASSY [A/D B BLOCK] (8/13) ......................................................................................................... 44
7.9 MAIN ASSY [DVI Receiver BLOCK] (9/13) .............................................................................................. 46
C 7.10 MAIN ASSY [Pastel BLOCK] (10/13) ..................................................................................................... 48
7.11 MAIN ASSY [SDRAM OSD BLOCK] (11/13) ......................................................................................... 52
7.12 MAIN ASSY [LVDS Transmitter BLOCK] (12/13) ................................................................................... 54
7.13 MAIN ASSY [FAN Control etc. BLOCK] (13/13)..................................................................................... 56
7.14 VSIF ASSY............................................................................................................................................. 58
7.15 AUDIO ASSY ......................................................................................................................................... 60
7.16 SENB ASSY........................................................................................................................................... 62
7.17 SENC ASSY .......................................................................................................................................... 63
7.18 SEND ASSY .......................................................................................................................................... 64
7.19 COMM SLOT ASSY............................................................................................................................... 66
8. PCB CONNECTION DIAGRM ........................................................................................................................ 68
8.1 MAIN ASSY ............................................................................................................................................ 68
D

E

F

4 PDP-42MXE20
1 2 3 4
5 6 7 8

1. CONTRAST OF MISCELLANEOUS PARTS
NOTES: Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List.
The mark found on some component parts indicates the importance of the safety factor of the part. A
Therefore, when replacing, be sure to use parts of identical designation.
Screws adjacent to mark on product are used for disassembly.
Reference jNos. indicate the pages and Nos. in the service manual for the base model.
p f y
For the applying amount of lubricants or glue, follow the instructions in this manual.
(In the case of no amount instructions, apply as you think it appropriate.)
When ordering resistors, first convert resistance values into code form as shown in the following examples.
Ex.1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J=5%,
and K=10%).
560 56 101 561 ........................................................ RD1/4PU 5 6 1 J
47k 47 103 473 ........................................................ RD1/4PU 4 7 3 J
0.5 R50 ..................................................................................... RN2H R 5 0 K
1 1R0 ..................................................................................... RS1P 1 R 0 K
Ex.2 When there are 3 effective digits (such as in high precision metal film resistors). B
5.62k 562 10 1 5621 ...................................................... RN1/4PC 5 6 2 1 F

1.1 CONTRAST TABLE