TROUBLESHOOTING - HITACHI PLASMA TV - VERTICAL LINE
Symptom was caused by a defective Y-SUS PWB p/n TS05679.
Unit Shuts down after 10~20 seconds. First Power On, 5 sec. later, the Plasma
will click, 5 sec. later shutdown.
Found Va voltage loaded 350 ohms or less to ground.
First removed Fuse on the Z-SUS PWB, measure right side of fuse holder
as shown in the picture, load disappeared.
Unit Shuts down after 10~20 seconds. First Power On, 5 sec. later, the
Plasma will click, 5 sec. later shutdown. Continued…
Traced load out the P1 connector to the Control PWB.
Removed both connector on each side to unload Va. Load disappeared with
left side connector P1 lifted. Load remained with right side connector P2
lifted. Found center connector P110 to Panel had the load. Lifted and load removed.
Bottom line, the Panel was defective with a shorted embedded register on
the ribbon connector.
DVI Doesn't Work
Clean the DVI input contacts with Isopropyl Alcohol using a stiff thin
brush. Sometimes contaminants can cause poor
connections on the DVI and/or HDMI inputs.
Cleaning these contacts should eliminate the problem.
LINES or BARS IN THE PICTURE:
The descriptions below all indicate the particular section which is
involved in the abnormality being displayed. Understand that if these lines
were only a single pixel in width, then the Panel itself is defective. If the
failure is being generated by a PWB and/or a connector, then the line will be
at least 8 pixels wide.
Address open (line off) Vertical Influence from the Control, X-Drive Left
and Right PWBs and COF.(Note: Defect Line shown is on the front Right, so the
X-Drive Left PWB would be involved).
Note: The Screen can be broken down into 7 Vertical Columns. (See the Bottom
PWB layout). Each of the connectors from the Control, X-Drive Left and Right
PWBs controls each column. Try to determine which area of the screen is affected
to determine the PWB involved. Also, if the COF is defective, the panel is
defective and can not be repaired.
Address short (line on) Vertical Influence from the Control, X-Drive Left
and Right PWBs and COF. (Note: Defect Line shown is on the front Right, so the
X-Drive Left PWB would be involved).
Note: The Screen can be broken down into 7 Vertical Columns. (See the Bottom
PWB layout). Each of the connectors from the Control, X-Drive Left and Right
PWBs controls each column. Try to determine which area of the screen is
affected to determine the PWB involved. Also, if the COF is defective, the
panel is defective and can not be repaired.
SUS short (line on) Horizontal Sustain Influence for Z and Y SUS PWBs,
Y Drive Upper and Y Drive Lower PWBs.
(Note: Defect Line shown is on the bottom, so the back X-Drive Left PWB
would be involved or the Z-SUS output from the bottom connector).
Note: The Screen can be broken down into 8 Horizontal Rows. (See the Bottom
PWB layout) from the Drive PWBs (4 from Upper Drive PWB and 4 from Lower Drive
PWB) and 2 Rows from the Z-SUS PWB (Top and Bottom). Each of the connectors
from the Control, X-Drive Left and Right PWBs controls each column. Try to
determine which area of the screen is affected to determine the PWB involved.
SUS open (line off) Horizontal Sustain Influence for Z and Y SUS PWBs,
Y Drive Upper and Y Drive Lower PWBs.
(Note: Defect Line shown is on the bottom, so the back X-Drive Left PWB
would be involved or the Z-SUS output from the bottom connector). Note: The
Screen can be broken down into 8 Horizontal Rows. (See the Bottom PWB layout)
from the Drive PWBs (4 from Upper Drive PWB and 4 from Lower Drive PWB) and 2
Rows from the Z-SUS PWB (Top and Bottom). Each of the connectors from the
Control, X-Drive Left and Right PWBs controls each column. Try to determine
which area of the screen is affected to determine the PWB involved.
CLICK ON THE PICTURES TO ZOOM IN
