13. Replacement Parts List ................................ 51
14. DC Voltages ................................................. 53
Version 009E-1.4
CH 1
CH 2, CH 3
No.009E-1
SERVICE MANUAL
Caution
Be sure to read this manual before servicing. To assure safety from fi re, electric shock, injury , harmful radiation
and materials, various measures have been provided for in this HITACHI Plasma display service manual.
Be sure to read all cautionary items described in the manual to maintain safety before servicing.
Service Warning
1. Since the Panel Module and front Filter are made of glass, handlea broken Module and/or Filter withsufficient care, in order not to be injured.
2. Repair work should not be started until after the Panel Module and the AC/DC Power supply have cooled
sufficiently.
3. Special care should be exercisedin the proximity of the display area in order not to damage its surface.
4. The Panel Module should not be touched with bare hands, as this will protect its surface from stains.
5. It is recommended to use clean soft gloves during the repair work in order to protect not only the display
area of the Panel Module but also the technician.
6. The Chip Tube of the Panel Module (located in the upper left corner of the back of the glass panel)
is very fragile; as well, the flat cables connecting the Panel to the drive circuit PWBs are very weak. Take
care not to damage these, otherwise, the panel will never light again.
Contents
1. Features ----------------------------------------------- 3
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
August 2004 Digital Media Division
Plasma Display
CMP420V1/CMP420V2/42EDT41 (PW1A)
parts ( ) should be OEM when replaced.
These parts are also safety related, so
electrical shock and/or fire could result
from using generic parts.
CAUTION FOR SAFETY
Please read this page before making repairs to the monitor.
This page explainscertain safety items found in this manual which are intended to ensure thesafety of the technician and to prevent accidents during any repair work.
Warning
Caution
This symbol means "CAUTION"
This symbol means "POSSIBILITY OF
ELECTRIC SHOCK"
Special Instructions
This indicates cabinet, chassis or parts
which require special attention.
Please follow any notesas well as all safety
precautions.
Prevent electrical shock
Please use care and caution when
servicing this product. High voltages
exist in the set which can cause injury
or death.
Please disconnect the AC power
during repair to prevent serious shock
or death.
Use only recommended components.
Please use the same characteristic components, which is same as previous for your
safety. To ensure reliability, specially marked
This symbol means "Personnel Electrical Safety Hazard"
This symbol means "Equipment Operational Hazard"
WARNING
Keep the same wiring dress for boards.
Safety check should be done after finished.
Repair to the HDCP circuit is limited.
This symbol means "DO IT!"
This symbol means "DON'T DO IT!"
This monitor uses insulated spacers
which are intended to isolate metal
parts from electrical components.
Internal wiring is isolated from components by
using clamps, retainers, etc., so please return
to original condition for prevention of electrical
shock or fire.
Every part (removed screws, component
and wiring) should be returned to previous
condition.
Check around the repairedarea for
any damage by mistake. Measure the
insulated impedance of AC by ohm meter.
Confirm that the value of impedance
is greater than 4M ohm.
It is possible for electric shock or fire tooccur if the value is less than 4M ohm.
Never remove the shield case, which is
assembled to code with the HDCP circuit
2
CMP420V1/CMP420V2/42EDT41 (PW1A)
[AV MONITOR model] CMP420V1, CMP420V2
[TELEVISION model] 42EDT41
- One mini D-sub terminal and one DVI-D terminal for RGB input.
(The D-sub terminal can also receive component RGB - selectable via customer OSD.)
- One composite/S-video input terminal and two component video input terminals, added with VIDEO board.
(One of the component inputs has the capability to select RGB via customer OSD.)
- One SCART terminal for European standard, added with VIDEO board.
(It operates as composite/S-video input and RGB input terminal, or composite video output terminal.
-One composite video output terminal as a monitoring output, added with VIDEO board.
-Simple type remote (CP-RD4)
- Various input/output terminals, added with VIDEO board. (same features as above mentioned AV MONITOR)
- Tuner input added with VIDEO board
- Complex type remote (CLU-W900)
PRECAUTIONS
● How to clean the plasma panel screen (front glass) of the monitor
Before cleaning the monitor, turn off the monitor and disconnect the power plug from the power outlet.
To prevent scratching or damaging the plasma screen face, do not wipe the surface with sharp or hard
objects. Clean the screen with a soft cloth moistened with warm water and dry with a soft cloth. If it is not
clean enough, then use a cloth with glass cleaner. Do not use any harsh or abrasive chemicals.
● How to clean the cabinet of the monitor
Use a soft cloth to clean the cabinet and control panel of the monitor. When excessively soiled dilute a neutral
detergent in water, wet and wring out the soft cloth and afterward wipe with a dry soft cloth.
Never use acid/alkaline detergent, alcoholic detergent, abrasive cleaner, powder soap, OA cleaner, car wax,
etc. because they could cause discoloration, scratches or cracks.
The 42-inch color plasma display panel, with a resolution of 852 (H) x 480(V) pixels, creates a high-definition, largescreen (aspect ratio : 16:9) and low-profile flat display. Free from electromagnetic interferences from geomagnetic
sources and ambient power lines, the panel produces medium-quality images free from any color misconvergence
or corner focus distortion.
● High Performance Digital Processor
A wide range of personal computer signals can be handled, from 640 x 400, 640 x 480 VGA to 1600 x 1200 UXGA.
(RGB analog input)
● Easy-to-use remote control and on-screen-display system (OSD)
The remote control included eases the setting of display controls. Furthermore, the on-screen-display (OSD),
displays the input status control settings in an easy-to-view fashion.
● Power saving system
The International ENERGY STAR
nals are not available.
When connected to a VESA DPMS-compliant PC, the monitor cuts its power consumption while it is idle.
power saver feature saves power consumption automatically when input sig-
● TruBass
TruBass, SRS and ( ) symbol are trademarks of SRS Labs,Inc.
TruBass technology is incorporated under license from SRS Labs, Inc.
3
2. Specifications
CMP420V1/CMP420V2/42EDT41 (PW1A)
Display
Panel
Net dimensions
(excluding Speakers/Stand)
Net weight
(excluding Speakers/Stand)
Ambient
conditions
Power supply
Power consumption/at standby
Audio output
(RGB input)
Input signals
(Video input)
Input signals
Video output Signal
(RF input)
Input signals
dimensions
Resolution
Temperature
Relative humidity
Input terminals
Video signals
Sync signals
Input terminals
Video signals
Input terminals
RF Video System
Approx. 42 inches (920 (H) x 518 (V) mm, diagonal 1059mm)
852 (H) x 480 (V) pixels
1030 (W) x 636 (H) x 91 (D) mm
CMP420V1/V2:33.2kg 42EDT41:34.2kg
Operating : 5 to 35, Storage : -15 to 60
Operating : 20% to 80%, Storage : 20% to 90% (non-condensing)
AC100 - 240V, 50/60Hz
310W / <3W
12W + 12W (6ǡ)
RGB1 DVI input terminal (DVI-D)
RGB1 audio input terminal (3.5mm Stereo Mini Jack)
RGB2 analog RGB input terminal (D-sub 15-pin)
RGB2 audio input terminal (3.5mm Stereo Mini Jack)
NOTE:
1st number indicates normal button operation
2nd number indicates function during MENU
Rear Label
7654321
-+
OK
2. VOL
2. ADJ
1. SUB POWER
3. VOL
3. ADJ
4. PROGRAM
4. SELECT
5. PROGRAM
5. SELECT
6. INPUT SELECT
6. OK
7. MENU
3. Component names
[Main unit]
Control panel
• Adjustment buttons are located
on the bottom.
• The back cover is provided with
indications to distinguish the
adjustment buttons.
Remote-control
receiver
Indicating lamp
• The main power switch is located at the back, on the
lower surface.
Main power switch
[Remote control]
for
CMP420V1
CMP420V2
for
42EDT41
5
CMP420V1/CMP420V2/42EDT41 (PW1A)
4. Service points
Lead free solder
This product uses lead free solder (unleaded) to help preserve the environment. Please read these
instructions before attempting any soldering work.
Caution: Always wear safety glasses to prevent fumes or molten solder from getting into the eyes. Lead
free solder can splatter at high temperatures (600˚C).
Lead free solder indicator
Printed circuit boards using lead free solder are engraved with an "F."
Properties of lead free solder
The melting point of lead free solder is 40-50˚C higher than leaded solder.
Servicing solder
Solder with an alloy composition of Sn-3.0Ag-0.5Cu or Sn-0.7Cu is recommended.
Although servicing with leaded solder is possible, there are a few precautions that have to be taken. (Not
taking these precautions may cause the solder to not harden properly, and lead to consequent malfunctions.)
Precautions when using leaded solder
Remove all lead free solder from soldered joints when replacing components.
If leaded solder should be added to existing lead free joints, mix in the leaded solder thoroughly after the
lead free solder has been completely melted (do not apply the soldering iron without solder).
Servicing soldering iron
A soldering iron with a temperature setting capability (temperature control function) is recommended.
The melting point of lead free solder is higher than leaded solder. Use a soldering iron that maintains a high
stable temperature (large heat capacity), and that allows temperature adjustment according to the part being
serviced, to avoid poor servicing performance.
Recommended soldering iron:
Soldering iron with temperature control function (temperature range: 320-450˚C)
BURN-IN MODE
When the Burn-in feature is turned ON, the plasma panel operates normally on all inputs that
have a signal. On inputs that do not have a signal, the plasma panel displays a cycling single
color test pattern (see below) which is generated internally. This can be helpful to determine
if the panel is capable of displaying anything.
Rear Label
1. SUB POWER
2. VOL
2. ADJ
3. VOL
3. ADJ
4. PROGRAM
4. SELECT
5. PROGRAM
5. SELECT
6. INPUT SELECT
6. OK
7. MENU
BURN-IN MODE (ON)
With unit in standby mode
(turned off), press and hold: >
-+
NOTE:
1st number indicates normal button operation
2nd number indicates function during MENU
After the unit comes on, continue to hold the
buttons down until the initial OSD goes
away. OSD will then appear indicating that
126
BURN-IN MODE is engaged.
(OSD > Burn In On)
OK
7654321
BURN-IN MODE (OFF)
With unit in standby mode
(turned off), press and hold: >
White Yellow Cyan Green Magenta Red Blue Black
12
After the unit comes on, continue to hold the
buttons down until the initial OSD goes
away. OSD will then appear indicating that
BURN-IN MODE is disengaged.
(OSD > Burn In Off)
7
CMP420V1 / CMP420V2 / 42EDT41 (PW1A)
SERVICE MODE ACCESS
DEMO MODE
DEMO MODE
When the DEMO feature is turned ON, both the remote and the plasma panel front panel
buttons (with the exception of the SUB POWER button) are non-operational. This can be
useful for the Sales / Dealers to prevent anyone from playing with any of the settings.
NOTE: This is the front panel shortcut to parameter #175 in the I2C ADJUSTMENT MODE.
Rear Label
1. SUB POWER
2. VOL
2. ADJ
3. VOL
3. ADJ
4. PROGRAM
4. SELECT
5. PROGRAM
5. SELECT
6. INPUT SELECT
6. OK
7. MENU
DEMO MODE (ON)
With unit in standby mode
(turned off), press and hold: >
-+
NOTE:
1st number indicates normal button operation
2nd number indicates function during MENU
After the unit comes on, continue to hold the
buttons down until the initial OSD goes
away. DEMO MO DE is now engaged, al-
136
though you will not see any OSD confirmation.
OK
7654321
DEMO MODE (OFF)
With unit in standby mode
(turned off), press and hold: >
13
After the unit comes on, continue to hold
the buttons down until the initial OSD goes
away. DEMO MO DE is now disengaged,
although you will not see any OSD confirmation.
8
CMP420V1 / CMP420V2 / 42EDT41 (PW1A)
SERVICE MODE ACCESS
I2C ADJUSTMENT MODE
I2C ADJUSTMENT MODE
When the set is in the I2C Adjustment mode, use the cursor buttons for selecting the
adjustment parameter, and for changing the parameter’s value. Use the OK button to
confirm. After adjustments are complete, press the MENU button to return the set to normal
operating condition.
Rear Label
1. SUB POWER
2. VOL
2. ADJ
3. VOL
3. ADJ
4. PROGRAM
4. SELECT
5. PROGRAM
5. SELECT
6. INPUT SELECT
6. OK
7. MENU
I2C Adjustment Mode
With unit in standby mode
(turned off), press and hold: >
-+
NOTE:
1st number indicates normal button operation
2nd number indicates function during MENU
After the unit comes on, continue to hold the
buttons down until the initial OSD goes
away. OSD will then appear indicating that
146
I2C ADJUSTMENT MODE is engaged.
OK
7654321
MEMORY INIT IALIZATION
Don’t indiscriminately perform this procedure as it can result in a loss of data if the old values were not recorded.
1. Engage I2C Adjustment mode.
2. Select parameter #744. Change the data value from “0” to “1”.
3. Activate MEMORY INITIALIZATION by holding down the OK button for at least
three seconds.
4. Select parameter #374. Change the data value from “1” to “0”.
5. Check that the set changes input to AV1, indicating that the preset values have been
loaded.
9
CMP420V1 / CMP420V2 / 42EDT41 (PW1A)
SERVICE MODE ACCESS
FACTORY RESET
FACTORY RESET
Occasionally, it becomes necessary to perform a factory reset. This is different than the
Memory Initialization, only customer settings are affected by Factory Reset.
Rear Label
1. SUB POWER
2. VOL
2. ADJ
3. VOL
3. ADJ
4. PROGRAM
4. SELECT
5. PROGRAM
5. SELECT
6. INPUT SELECT
6. OK
7. MENU
Factory Reset
With unit in standby mode
(turned off), press and hold: >
-+
NOTE:
1st number indicates normal button operation
2nd number indicates function during MENU
After the unit comes on, continue to hold the
buttons down until the initial OSD goes
away. Factory Reset ha s now engaged,
156
although you will not see any OSD confirmation.
OK
7654321
10
CMP420V1 / CMP420V2 / 42EDT41 (PW1A)
SERVICE MODE ACCESS
DIAGNOSIS MODE
DIAGNOSIS MODE
This chassis has a limited self-diagnosis mode. When activated, the microprocessor generates a series
of internal communication checks and outputs the results via OSD, as seen on the table below. Since
it uses the OSD to display the results, any circuit failures which result in a “no display” or “no picture” condition will not be able to be seen, obviously. ANY operation (volume, channel, menu, input,
etc.) will cause the unit to exit from the Diagnosis mode.
Diagnosis Mode
With unit in standby mode
(turned off), press and hold: >
Codes
Most Recent Failure
15
Results
Diagnosis
After the unit comes on, continue to hold the
buttons down until the initial OSD goes
away. OSD will then appear indicating that
the DIAGNOSIS MODE is engaged.
H15: OKH11: OK
H31: OKH16: OK
H33: OKH32: OK
- - -F63F63- - -- - -
Code Problem Phenomenon Cause
H11* Tuner problem Can not receive the main signal from antenna U101 error
H15 Composite video SW IC problem Can not receive picture and audio - can not change input mode I201 error
H16 Component video SW IC problem No component picture - can not change input mode I202 error
H31 Color Demodulator IC problem Abnormal color - dark picture I501 error
H32 Sync separator IC problem Unsynchronized picture I601 error
H33 3D Y/C separator problem Abnormal color - dark picture/no picture I302 error
F63 I2C Bus latch problem Can’t store data settings
11
SDA3/SCL3
latched up
* Only with units having a tuner circuit
CMP420V1/CMP420V2/42EDT41 (PW1A)
j
p
Service
Adj.
No.Adjust ItemsMode
0 R DRIVE1 [TV/VIDEO/DSUB-COMP]COOL255224O
1 G DRIVE1 [TV/VIDEO/DSUB-COMP]COOL255224O
2 B DRIVE1 [TV/VIDEO/DSUB-COMP]COOL255224O
3 R DRIVE2 [TV/VIDEO/DSUB-COMP]NORMAL255224O
4 G DRIVE2 [TV/VIDEO/DSUB-COMP]NORMAL255224O
5 B DRIVE2 [TV/VIDEO/DSUB-COMP]NORMAL255224O
6 R DRIVE3 [TV/VIDEO/DSUB-COMP]WARM255224O
7 G DRIVE3 [TV/VIDEO/DSUB-COMP]WARM255224O
8 B DRIVE3 [TV/VIDEO/DSUB-COMP]WARM255224O
9 R DRIVE4 [TV/VIDEO/DSUB-COMP]BLACK & WHITE255224O
10 G DRIVE4 [TV/VIDEO/DSUB-COMP]BLACK & WHITE255224O
11 B DRIVE4 [TV/VIDEO/DSUB-COMP]BLACK & WHITE255224O
12 R DRIVE1 [DVI-PC/DVI-STB/DSUB-RGB]COOL255224O
13 G DRIVE1 [DVI-PC/DVI-STB/DSUB-RGB]COOL255224O
14 B DRIVE1 [DVI-PC/DVI-STB/DSUB-RGB]COOL255224O
15 R DRIVE2 [DVI-PC/DVI-STB/DSUB-RGB]NORMAL255224O
16 G DRIVE2 [DVI-PC/DVI-STB/DSUB-RGB]NORMAL255224O
17 B DRIVE2 [DVI-PC/DVI-STB/DSUB-RGB]NORMAL255224O
18 R DRIVE3 [DVI-PC/DVI-STB/DSUB-RGB]WARM255224O
19 G DRIVE3 [DVI-PC/DVI-STB/DSUB-RGB]WARM255224O
20 B DRIVE3 [DVI-PC/DVI-STB/DSUB-RGB]WARM255224O
21 R DRIVE4 [DVI-PC/DVI-STB/DSUB-RGB]BLACK & WHITE255224O
22 G DRIVE4 [DVI-PC/DVI-STB/DSUB-RGB]BLACK & WHITE255224O
23 B DRIVE4 [DVI-PC/DVI-STB/DSUB-RGB]BLACK & WHITE255224O
24 Black Level(RGB_AMP)TV/VIDEO254127
25 Black Level(RGB_AMP)PC254127
26 Reference Amplitude(RGB_AMP)TV/VIDEO254127
27 Reference Amplitude(RGB_AMP)PC254127
28 Display for Max. Amplitude LevelMain--
29 Display for Max. Amplitude LevelSUB--
30 SUB_CONTRAST(RF)MAIN157
31 SUB_CONTRAST (AV1)MAIN/SUB COMPOSITE mode157
32 SUB_CONTRAST(RF)SUB157
33 SUB_CONTRAST (AV4)MAIN/SUB COMPOSITE mode157
34 SUB_COLOR(VIDEO-PAL/SECAM)MAIN1510
35 SUB_COLOR(RF-PAL/SECAM)MAIN38
36 SUB_COLOR(VIDEO-NTSC)MAIN1510
37 SUB_COLOR(RF-NTSC)MAIN156
38 SUB_COLOR(VIDEO-PAL/SECAM)SUB1510
39 SUB_COLOR(RF-PAL/SECAM)SUB38
40 SUB_COLOR(VIDEO-NTSC)SUB1510
41 SUB_COLOR(RF-NTSC)SUB158
42 TINT(VIDEO)MAIN6333O
43 TINT(RF)MAIN6333O
44 TINT(VIDEO)SUB6333O
45 TINT(RF)SUB6333O
46 S_B-Y_ADJMAIN158
47 S_R-Y_ADJMAIN158
48 S_B-Y_ADJSUB158
49 S_R-Y_ADJSUB158
50 BPF_Q (4.43MHz)MAIN33
51 BPF_f0 (4.43MHz)MAIN31
52 Y_DL (4.5MHz) For AsiaMAIN105
53 Y_DL (5.5MHz PAL/NTSC4.43) For AsiaMAIN103
54 Y_DL (5.5MHz SECAM) For AsiaMAIN100
55 Y_DL (6.0PAL/NTSC4.43) For AsiaMAIN109
56 Y_DL (6.0SECAM) For AsiaMAIN109
57 Y_DL (VIDEO PAL/NTSC4.43)MAIN106
58 Y_DL (VIDEO SECAM)MAIN108
59 Y_DL (VIDEO NTSC)MAIN106
60 BELL_f0MAIN10
61 Y_OUT_LEVEL (VIDEO)MAIN6313
62 Initialize function for EEPROM of Video PWB board10
63 Y_OUT_LEVEL (TEXT)MAIN630
64 C_OUT_LEVEL (VIDEO)MAIN637
65 Check condition of EEPROM of Video PWB board0:Normal, 1:Abnormal(Fail or no assembly)1-
66 C_OUT_LEVEL (TEXT)MAIN630
67 Y_OUT_LEVEL (TEXT)SUB6312
adjustment items by I
2
C-bus control
Function
Maximum
Value
O : Should be ad
: Should be followed
Default
Formatter
usted
Changed Component
VIDEO
PWB
PWB
revious data
TUNER
PWB
PDP
PANEL
12
CMP420V1/CMP420V2/42EDT41 (PW1A)
j
p
Adj.
Function
No.Adjust ItemsMode
Maximum
Value
Default
68 Y_OUT_LEVEL (VIDEO)SUB6313
69 Dispersion Time of Sustain current 0: 2 Times, 1: 4 timesFor Dynamic (Day) mode10
70 C_OUT_LEVEL (TEXT)SUB637
71 C_OUT_LEVEL (VIDEO)SUB637
72 Dispersion Time of Sustain current 0: 2 Times, 1: 4 timesFor Natural (Night) mode11