SONY tci-270 Service Manual
Plasma Monitors
Plasma Display Panel (PDP)
• Introduced to North
America in 1997.
• The two main attraction
to PDP are:
– They look very good and
– They allow for a large
screen into a relatively
small space.
1
Plasma Display Panel
• PDP looks like a CRT monitor but works like a fluorescent
lamp.
• Plasma monitors look different from CRT or LCD because
their phosphors are different.
– CRT excite their phosphors with thousands of volts of
energy while
– the gap between 2-thin pieces of glass barely allow for
230 volts.
• This lower voltage use to excite the phosphor creates colour
characteristics which are much different from those of the
CRT.
Plasma Display Panel
• The benefits of gas
plasma are as follows:
– Wide viewing angle
– Perfect linearity
– Lightweight & compact
– Resistance to magnetic
influence
– The display has more
depth, texture and
warmth.
2
Plasma Display Panel
• One downside is that they are not as bright
as other types of displays
• They usually make up for it with better
contrast ratio and colour saturation.
• Static image left on a glass plasma screen
for too long will burn the phosphor, leaving
a “ghost”.
PFM B Series Network Adapter
PFM B Series Network Adapter
PFM B Series Network Adapter
Features
Features
Features
- Geode 300MHz CPU incorporated
- Windows CE 3.0
- Built-in flash memory 48 MB
- Ethernet/Wireless LAN
- USB key board Mouse
- e-conference compatibility
- Various presentations possible
on single PFM display
- PowerPoint/Excel Viewer
- Internet Browsing
- Image Viewer
- Memory Stick capability
3
3.
BKM-B30NW
BKM-B30NW
BKM-B30NW
D
BKM-B30NW,BKM-B30NWJ
BKM-30NW
PFM-42B1 Side View
Wireless Application
Wireless Application
Wireless Application
Video Input Connector
- S terminal
-Composite - RCA Pin
PC Card Slot
Compact Flash Card
Ethernet Connector
USB Connector( x 2 )
Wireless - LAN
Network adapter
WirelessLAN card
Peer to Peer connection
VAIO Note
Wireless Card
IEEE802.11b
4
Product Concept
Product Concept
Product Concept
• From Simple Display unit to Network Display System
• Windows-CE Incorporated
- Presentation Viewer
- Image Viewer
- Internet Browser
How PDP Works
• Gas plasma monitors use a
lightweight, flat surface
covered with a matrix of tiny
glass bubbles.
• Every glass bubble is filled
with neon and xenon gases.
• When electricity flows
through the bubble matrix, the
gases give off ultraviolet rays.
• These rays makes the
phosphors glow.
5
How PDP Works
• Step 1: Address electrode
causes gas to charge to plasma
state.
• Step 2: Gas in plasma state
reacts with phosphors in
discharge region.
• Step 3: Reaction causes each
subpixel to produce Red,
Green, and Blue light
1
2
R
3
3
G B
B
Plasma Display Panel
Neon Gas
Y
R G
Phosphor
Ultra
Violet
When we want an ignition, we apply Va (60V) + Vs (180V) = 240V
Without A we have no ignition (UV).
A
Va = (60V)
GND
A = Address
B
X
VS
GND
6
Plasma Display Panel
Display Glass
X
SUS
ACOM
L A BUS L A BUS
LOGIC Board
DC-DC
CONV
ACOM
Y1
Y2
Y480
Y
COM
SUS
Y
16.7msec. (60 Hz.)
1 2 3 4 5 6 7 8
Reset Address Sustain
X,Y A,Y X,Y
Y1
Y2
A
X
Y
Electrodes
Plasma Monitor
1 Frame
-VY (-170V)
H. Sync
V. Sync
Sub Frames #
Sub Frames
GND
VSC -70V
-Va =60V
GND
Vs
GND
Vs
Signal Processing
PDP Unit
Power Supply
Signal Inputs
&
RGB Switching
7
Servicing the PDP
PDP Boards
8
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