Sony KDE-55XBR950 (serv.man2) Service Manual ▷ View online
-5-
(2) Video Signal Definition and Function
The table below summarizes the definitions and functions of input video signals before LVDS
conversion.
conversion.
Item
Signal name
Number
of signals
Input/
output
Signal definition and function
Video signal
(ODD)
(ODD)
DATA-RA
DATA-GA
DATA-BA
DATA-GA
DATA-BA
10
10
10
10
10
Input
Display data signal
RA9/GA9/BA9 is the highest intensity bit.
RA0/GA0/BA0 is the lowest intensity bit.
RA9/GA9/BA9 is the highest intensity bit.
RA0/GA0/BA0 is the lowest intensity bit.
Video signal
(EVEN)
(EVEN)
DATA-RB
DATA-GB
DATA-BB
DATA-GB
DATA-BB
10
10
10
10
10
Input
Display data signal
RB9/GB9/BB9 is the highest intensity bit.
RB0/GB0/BB0 is the lowest intensity bit.
RB9/GB9/BB9 is the highest intensity bit.
RB0/GB0/BB0 is the lowest intensity bit.
Clock
DCLKA
DCLKB
2 Input
Video signal timing: These signals
continuously input are necessary. Data are
read when these signals are fallen.
continuously input are necessary. Data are
read when these signals are fallen.
Horizontal
sync signal
sync signal
Hsync
1 Input
Regulates one horizontal line of data: Begins
control of the next screen when Hsync is
fallen.
control of the next screen when Hsync is
fallen.
Vertical sync
signal
signal
Vsync
1 Input
Screen starts up control timing signal: Begins
control of the next screen when Vsync is
fallen.
Input the same frequency in both
odd-numbered and even-numbered fields.
control of the next screen when Vsync is
fallen.
Input the same frequency in both
odd-numbered and even-numbered fields.
Original
Display signal
(before LVDS
transmittance)
Display signal
(before LVDS
transmittance)
Blanking
signal
signal
BLANKA
BLANKB
2 Input
Display period timing signal.
H indicates the display period and L indicates
the non display period.
Note:
Set this timing properly like followings, as is
used internally for signal processing.
H indicates the display period and L indicates
the non display period.
Note:
Set this timing properly like followings, as is
used internally for signal processing.
・
Set the blanking period so that the number of
effective display data items in one horizontal
period is 1366.
effective display data items in one horizontal
period is 1366.
・
Set the number of blanking signals in one
vertical period to 384, which is one half the
number of effective scan lines.
number of effective scan lines.
If the BLANK changes when the Vsync
frequency is switched, the screen display may
be disturbed or brightness may change.
The screen display is restored to the normal
state later when the BLANK length is
constant again.
frequency is switched, the screen display may
be disturbed or brightness may change.
The screen display is restored to the normal
state later when the BLANK length is
constant again.
-6-
(3) Connector Specification
The connector specification is shown below. Please do not connect anything with the terminal NC.
(3-1) Signal connector [CN1]
Pin No.
Signal name
Pin No.
Signal name
1 RA0- 2
GND(LVDS)
3 RA0+
4 SCL
5 RA1-
6 GND
7 RA1+
8 SDA
9 RA2-
10 GND(LVDS)
11 RA2+
12 CPUGO
13 RACLK-
14 PDPGO
15 RACLK+
16 IRQ
17 RA3-
18 PDWN
19 RA3+
20 GND(LVDS)
21 RA4-
22 GND
23 RA4+
24 GND
25 GND
26 GND
27 GND
28 GND
29 GND
30 GND
DF13-30DP-1.25 V (tin-plated) (Maker: HIROSE DENKI)
[Conforming connector]
Housing: DF13-30DS-1.25C Contact: DF13-2630SCF
(3-2) Signal connector [CN2]
Pin No.
Signal name
Pin No.
Signal name
1 RA0- 2
GND(LVDS)
3 RA0+
4 SCL
5 RA1-
6 GND
7 RA1+
8 SDA
9 RA2-
10 GND(LVDS)
11 RA2+
12 CPUGO
13 RACLK-
14 PDPGO
15 RACLK+
16 IRQ
17 RA3-
18 PDWN
19 RA3+
20 GND(LVDS)
21 RA4-
22 GND
23 RA4+
24 GND
25 GND
26 GND
27 GND
28 GND
29 GND
30 GND
DF13-30DP-1.25 V (tin-plated) (Maker: HIROSE DENKI)
[Conforming connector]
Housing: DF13-30DS-1.25C Contact: DF13-2630SCF
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(3-3) Power Source Connectors (PSU only is used on repair working)
(a) Power input / Signal control connector [CN3]
Pin No.
Symbol
1 N.C.
2 VSAGO
3 VCEGO
4 Vrs
5 Vra
6 GND
7 GND
8 GND
9 Vpr2
10 Vcc
11 Vcc
B11B-PH-SM3-TB (Maker: JST)
[Conforming connector]
Housing: PHR-11
Contact: SPH-002T-P0.5L
Contact: SPH-002T-P0.5L
(b) Power supply output connector for system [CN21]
Pin No.
Symbol
1 Va
2 Va
3 Vcc
4 Vcc
5 Vcc
6 GND
7 GND
8 GND
9 Vs
10 Vs
11 Vs
B10P-VH (Maker: JST)
[Conforming connector]
Housing: VHR-10N
Contact: SVH-21T-P1.1
Contact: SVH-21T-P1.1
-8-
2 SAFETY HANDLING of THE PLASMA DISPLAY
2.1 NOTES TO FOLLOW DURING SERVICING
The work procedures shown with the Note indication are important for ensuring the
safety of the product and the servicing work. Be sure to follow these instructions.
safety of the product and the servicing work. Be sure to follow these instructions.
Before starting the work, secure a sufficient working space.
At all times other than when adjusting and checking the product, be sure to turn OFF the
main POWER switch and disconnect the power cable from the power source of the display
(jig or the display itself) during servicing.
main POWER switch and disconnect the power cable from the power source of the display
(jig or the display itself) during servicing.
To prevent electric shock and breakage of PC board, start the servicing work at least 30
seconds after the main power has been turned off. Especially when installing and removing
the power supply PC board and the SUS PC board in which high voltages are applied, start
servicing at least 4 minutes after the main power has been turned off.
seconds after the main power has been turned off. Especially when installing and removing
the power supply PC board and the SUS PC board in which high voltages are applied, start
servicing at least 4 minutes after the main power has been turned off.
While the main power is on, do not touch any parts or circuits other than the ones specified.
The high voltage power supply block within the PDP module has a floating ground. If any
connection other than the one specified is made between the measuring equipment and
the high voltage power supply block, it can result in electric shock or activation of the
leakage-detection circuit breaker.
The high voltage power supply block within the PDP module has a floating ground. If any
connection other than the one specified is made between the measuring equipment and
the high voltage power supply block, it can result in electric shock or activation of the
leakage-detection circuit breaker.
When installing the PDP module in, and removing it from the packing carton, be sure to
have at least two persons perform the work while being careful to ensure that the flexible
printed-circuit cable of the PDP module does not get caught by the packing carton.
have at least two persons perform the work while being careful to ensure that the flexible
printed-circuit cable of the PDP module does not get caught by the packing carton.
When the surface of the panel comes into contact with the cushioning materials, be sure to
confirm that there is no foreign matter on top of the cushioning materials before the surface
of the panel comes into contact with the cushioning materials. Failure to observe this
precaution may result in the surface of the panel being scratched by foreign matter.
confirm that there is no foreign matter on top of the cushioning materials before the surface
of the panel comes into contact with the cushioning materials. Failure to observe this
precaution may result in the surface of the panel being scratched by foreign matter.
When handling the circuit PC board, be sure to remove static electricity from your body
before handling the circuit PC board.
before handling the circuit PC board.
Be sure to handle the circuit PC board by holding the such large parts as the heat sink or
transformer. Failure to observe this precaution may result in the occurrence of an
abnormality in the soldered areas.
transformer. Failure to observe this precaution may result in the occurrence of an
abnormality in the soldered areas.
Do not stack the circuit PC boards.
Failure to observe this precaution may result in problems resulting from scratches on the
parts, the deformation of parts, and short-circuits due to residual electric charge.
Failure to observe this precaution may result in problems resulting from scratches on the
parts, the deformation of parts, and short-circuits due to residual electric charge.
Routing of the wires and fixing them in position must be done in accordance with the
original routing and fixing configuration when servicing is completed.
All the wires are routed far away from the areas that become hot (such as the heat sink).
These wires are fixed in position with the wire clamps so that the wires do not move,
thereby ensuring that they are not damaged and their materials do not deteriorate over
long periods of time. Therefore, route the cables and fix the cables to the original position
and states using the wire clamps.
original routing and fixing configuration when servicing is completed.
All the wires are routed far away from the areas that become hot (such as the heat sink).
These wires are fixed in position with the wire clamps so that the wires do not move,
thereby ensuring that they are not damaged and their materials do not deteriorate over
long periods of time. Therefore, route the cables and fix the cables to the original position
and states using the wire clamps.
Perform a safety check when servicing is completed.
Verify that the peripherals of the serviced points have not undergone any deterioration
during servicing. Also verify that the screws, parts and cables removed for servicing
purposes have all been returned to their proper locations in accordance with the original
setup.
Verify that the peripherals of the serviced points have not undergone any deterioration
during servicing. Also verify that the screws, parts and cables removed for servicing
purposes have all been returned to their proper locations in accordance with the original
setup.
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