Hitachi pw1 schematic
February 2006 (ver a)
HITACHI
PLASMA
TELEVISION
PW1 MODEL LIST
Model Chassis Remote P/N
42EDT41
42EDT41A
CMP420V1
CMP420V1A
CMP420V2
CMP420V2A
PW1-A CLU-W900 HL02042
PW1-A CLU-W900 HL02042
PW1-A CP-RD4 HL01903
PW1-A CP-RD4 HL01903
PW1-BA CP-RD4 HL01903
PW1-BA CP-RD4 HL01903
Service Web Site
CONTENTS... 2006 PW1 Chassis Plasma Television Information
http://www.hitachiserviceusa.com
Materials Prepared by… Alvie Rodgers C.E.T. (Chamblee, GA.)
PW1 BLANK PAGE “USE FOR NOTES”
BLANK PAGE
February 2006 (ver a)
TOPICS PAGE
PW1 TABLE OF CONTENTS
SECTION (1) PRODUCT INFORMATION:
• Product Pictures --------------------------------------------------------------------- 01-01
• Remote Control ----------------------------------------------------------------------- 01-01
• Rear A/V Inputs on the AV Unit -------------------------------------------------- 01-01
• Product Description and Features ---------------------------------------------- 01-01
• Product Dimensions ---------------------------------------------------------------- 01-03
SECTION (2) PWB LAYOUT AND PART NUMBERS:
• Top Layer PWBs and their Part Numbers ------------------------------------ 02-01
• Bottom Layer PWBs and their Part Numbers -------------------------------- 02-02
SECTION (3) TROUBLESHOOTING:
GENERAL INFORMATION:
• Plasma Panel and COF General Information -------------------------------- 03-01
• Horizontal Address Control ------------------------------------------------------- 03-02
• Flat Flexible Cables (FFC) -------------------------------------------------------- 03-02
• Voltage Label Explanation -------------------------------------------------------- 03-03
• Defect Terms Explanation -------------------------------------------------------- 03-03
• X Drive PWB Information ---------------------------------------------------------- 03-05
• Disconnecting COF Connector -------------------------------------------------- 03-05
• Control PWB Description ---------------------------------------------------------- 03-05
• Z-SUS PWB Description ---------------------------------------------------------- 03-06
• Y-SUS PWB Description ---------------------------------------------------------- 03-07
• IPM (Intelligent Power Supply) Description ----------------------------------- 03-09
NO PICTURE CHECKS:
• Checking connections between PWBs --------------------------------------- 03-10
• Checking the Gas Port ------------------------------------------------------------- 03-10
• Checking the Power Supply PWB ---------------------------------------------- 03-11
• Checking the Control PWB ------------------------------------------------------ 03-12
• Checking the Y-SUS and Y-Drive PWB --------------------------------------- 03-13
• Checking the Intelligent Power Supply on the Y and X SUS PWB ----- 03-14
• Checking the Z-SUS PWB and Flexible Cables ----------------------------- 03-15
VERTICAL BAR or LINE DEFECT CHECKS:
• Checking the COF (Chip On Film) Connector ------------------------------ 03-16
• Checking the Control PWB Signal Flow --------------------------------------- 03-17
• Single Vertical Line Defect Check ---------------------------------------------- 03-18
• Multiple Evenly Spaced Vertical Line Defect Check ------------------------ 03-19
HORIZONTAL BAR or LINE DEFECT CHECKS:
• Checking the Flexible Cable Connectors ------------------------------------- 03-19
• Y-Drive Upper or Lower PWB Scan IC Check ------------------------------- 03-20
• Negative Picture (Mis-Discharge) Check -------------------------------------- 03-21
Materials prepared by
Alvie Rodgers C.E.T.
Table of Contents Page 1
Materials prepared by
Alvie Rodgers C.E.T.
PW1 TABLE OF CONTENTS
TOPICS PAGE
February 2006 (ver a)
SECTION (3) TROUBLESHOOTING (Continued):
FLOW CHARTS:
• Fast Check Flow Chart ------------------------------------------------------------ 03-22
• Logical Judgment Flow Chart ---------- ------------------------------------------ 03-23
• Won’t Come On— No Sound Flow Chart ------------------------------------ 03-24
• No Picture LED Lighting Flow Chart ------------------------------------------- 03-25
• Power PWB Dead No Picture/Sound Flow Chart -------------------------- 03-26
SECTION (4) ADJUSTMENTS:
• Vs and Va Adjustments ------------------------------------------------------------ 04-01
• Vsetup, -Vy and Vsc Adjustments ---------------------------------------------- 04-02
SECTION (5) THINGS YOU SHOULD KNOW:
• See the index for this section after the Section 5 Divider. ---------------- 05-00
Table of Contents Page 2
PRODUCT
INFORMATION
SECTION 1
PW1 BLANK PAGE “USE FOR NOTES”
BLANK PAGE
PW1 CHASSIS PRODUCT INFORMATION
Remote Control CLU-W900
p/n HL02042
Rear Inputs
42EDT41 Overview
Sculpted lines and striking styling highlight the Hitachi 42” enhanced definition plasma
television. Designed for a depth of about four inches for convenient installation on almost
any wall or with the convenient table top swivel stand.
The 42EDT41 features a bright detailed EDTV Monitor image and includes Hitachi’s most
advanced video and graphics processor for great images from any source.
Convenience features include a wide variety of inputs including a DVI-HDTV (HDCP)
digital video input for compatibility with the latest digital video sources. Experience sharp,
accurate images from Hitachi’s new plasma television.
PAGE 01-01
PW1 CHASSIS PRODUCT INFORMATION
Product Highlights
Sleek, slim design:
Less than 4” thin, more picture in less space.
Wide Viewing Angle:
Plasma technology makes every seat in the house a clear, color accurate experience.
EDTV Monitor:
Enjoy 480 progressive scan resolution – an excellent match for DVD content
NTSC Tuner:
A built-in TV tuner makes it easy to tune into analog terrestrial or cable broadcasts
(un-scrambled cable)
16:9 aspect ratio:
For cinematic widescreen viewing.
New VirtualHD™ 1080p Digital Video Processor:
The 1080p digital video processor converts incoming non-480p signals to 1080p prior to the
480 progressive display to deliver smooth, sharp and accurate images.
New Automatic 3:2 film Correction/26-point Motion Adaptive Interpolation:
Ensures smooth, seamless display of both film and video-originated programming.
Multiple screen modes:
A wide range of options for viewing standard 4:3 programming on the 16:9 widescreen
display.
DVI-HDTV Digital Video Input:
This digital video input provides compatibility with the latest generation of HDTV Tuners
and DVD players.
Anti-reflective shield:
Uses a special coating on the protective shield that minimizes ambient room light reflections.
ENERGY STAR Compliant
PAGE 01-02
PW1 CHASSIS PRODUCT INFORMATION
Product Dimensions
42EDT41 42" Plasma EDTV
Inches 48-1/2 4/9/16 4 40-5/8 28 2/5/08 21-15/16 37-5/8 27-9/16 15-3/8 3/9/16 13/16 11/13/16
mm 1232 116 102 1032 711 67 557 956 700 391 90 21 300
A B C D E F G H I J K L M
PAGE 01-03
PW1 BLANK PAGE “USE FOR NOTES”
BLANK PAGE
PWB LAYOUT and
PART NUMBER
INFORMATION
SECTION 2
PW1 BLANK PAGE “USE FOR NOTES”
BLANK PAGE
PW1 CHASSIS PWB LAYOUT AND PART NUMBERS
PWB LAYOUT TOP LAYER
1. Filter PWB p/n TS05423 4. Joint PWB p/n TS05428
2. Power PWB p/n HA01361 5. Formatter PWB p/n TS05429
3. Video Card p/n TS05267 (with Tuner) 6. Audio PWB p/n TS05263
3a. Tuner PWB p/n HC00494 (Not Shown Located Inside Video Card) can be replaced separately.
PAGE 02-01
PW1 CHASSIS PWB LAYOUT AND PART NUMBERS
PWB LAYOUT BOTTOM LAYER
7. Y-Drive Upper p/n TS05672 11. Control (LVDS) PWB p/n TS05678
8. Y-Drive Lower p/n TS05673 12. X-Drive Right p/n TS05682
9. **Y-SUS PWB p/n TS05679 13. **Z-SUS PWB p/n TS05681
10. X-Drive Left p/n TS05683
** The Y-SUS and Z-SUS PWB must have Technical Services Authorization before ordering.
PAGE 02-02
TROUBLE
SHOOTING
SECTION 3
PW1 BLANK PAGE “USE FOR NOTES”
BLANK PAGE
PW1 CHASSIS TROUBLESHOOTING SECTION
PRELIMINARY INFORMATION:
The figure on the right shows a back
view of the Panel.
VERTICAL ADDRESS:
Vertical Addresses is controlled by the COF cables. COF stands for Chip On Film. This means
that the Ribbon Cable has imbedded IC and
resistors.
Note: There are 7 total COF cables controlling
the Vertical Addresses. They are broken down
into 2, 3, 2. The 2 on the left are controlled by the X-Drive Left PWB, the 3 in the middle are controlled by the
Control (LVDS) PWB and the 2 on the right are controlled by the X-Drive Right PWB.
The Figure below shows one of the COF cables. Note the chips, capacitors and resistors mounted on the flexible
ribbon cables.
Also note there are 4 COF per cable. (4 X 7 = 24 COFs). 4 Per cable, 7 Cables.
COF
(Chip On Film Cable):
Supplies a waveform which
was generated from the
Control PWB to the panel
and selects a output pin that
is controlled by COF (Chip
On Film) when it will be on
or off.
96 output pin per COF IC.
• The higher the resolution, the less spare
space where an IC can
be placed on the PWB
without using IC
PACKAGE, so a
BARE IC is used embedded right on the
cable.
• Because IC is not soldered on PWB directly, soldering defect rate is decreased.
• COF failure requires Panel replacement.
* Composition
1. FPC + Heat /Sink FPC for COF must have a Low Specification decline with getting damp
2. CHIP resistor + CHIP Capacitor
3. BARE IC (STV7610A/WAF) + Gold and Aluminum Wire
4. EPOXY Molding
PAGE 03-01
PW1 CHASSIS TROUBLESHOOTING SECTION
PRELIMINARY INFORMATION (Continued):
HORIZONTAL ADDRESS:
Horizontal Address is controlled by 6 Printed Circuit Cables.
Supplies a driving waveform to PANEL by connecting a PAD electrode of PANEL with PCB
(Y Drive and Z SUS).
• There are two types of this for Y Drive PWB. One is single-sided, another is
double-side. These have a pattern on it
• For Z SUS PWB, there is no pattern , single-sided and Beta type
(all of copper surface).
CONNECTIONS BETWEEN PWBs:
FFC (Flat Flexible Cable):
For connecting a Logic signal between PWBs. The one shown here is P101 from the Control PWB to the Y SUS
PWB.
• There is 0.5mm pitch, 50 pin type and
• 1mm pitch , 30 pin type.
PAGE 03-02
Loading...