Sony RM-PJAW10 / VPL-BW7 Service Manual ▷ View online
1-11
VPL-BW7
1-6. Circuit
Description
Main Board:
Video input block
The video input has two channels: Composite video and S-Video. The 2-channel inputs are sent directly to
the video processor, and converted to the digital data by the built-in AD converter of the video processor.
The video input has two channels: Composite video and S-Video. The 2-channel inputs are sent directly to
the video processor, and converted to the digital data by the built-in AD converter of the video processor.
PC input block
The Input A signal is input to the video processor and the video buffer. At the video processor, the signal
is converted to the digital data by the built-in AD converter. The signal input to the video buffer is output
as a monitor out.
To Input A, PC signals, component signals, and video GBR signals can be input.
The Input A signal is input to the video processor and the video buffer. At the video processor, the signal
is converted to the digital data by the built-in AD converter. The signal input to the video buffer is output
as a monitor out.
To Input A, PC signals, component signals, and video GBR signals can be input.
Monitor output block (PC)
The signals input to Input A is output. The signal of the channel that is selected with the input toggle
switch is output. No output is made if Video or S-Video is selected.
The signals input to Input A is output. The signal of the channel that is selected with the input toggle
switch is output. No output is made if Video or S-Video is selected.
Video processor & System control block
PW-190 made by Pixelworks Inc. is used. This IC performs pixel number conversion, aspect conversion,
and OSD addition to the input signals. This IC also controls brightness, sharpness, chroma, and hue.
In addition, the built-in CPU controls the system.
Control target: Control panel, OSD display, lamp cover switch, fi lter door switch, LED control, serial
control
PW-190 made by Pixelworks Inc. is used. This IC performs pixel number conversion, aspect conversion,
and OSD addition to the input signals. This IC also controls brightness, sharpness, chroma, and hue.
In addition, the built-in CPU controls the system.
Control target: Control panel, OSD display, lamp cover switch, fi lter door switch, LED control, serial
control
LCD timing generator (DSD) block
The IC for LCD panel made by Sony is used. This IC generates the timing for driving the LCD panel.
This uses the method that inverts the driving direction for each frame. In addition to timing generation,
this IC performs white balance adjustment, gamma adjustment, and color shading adjustment.
The IC for LCD panel made by Sony is used. This IC generates the timing for driving the LCD panel.
This uses the method that inverts the driving direction for each frame. In addition to timing generation,
this IC performs white balance adjustment, gamma adjustment, and color shading adjustment.
LCD driver block
The drive IC for LCD panel made by Sony is used. This drives the LCD panel in a 12-phase drive method
at the timing generated by the timing generator IC. The GBR and the circuit for three channels are
equipped.
The drive IC for LCD panel made by Sony is used. This drives the LCD panel in a 12-phase drive method
at the timing generated by the timing generator IC. The GBR and the circuit for three channels are
equipped.
FAN control, Thermal sensor block
The IC with the built-in FAN control and thermal sensor function is used.
. FAN control
This detects the FG of the FAN, and controls the number of rotations. The number of rotations is set in
The IC with the built-in FAN control and thermal sensor function is used.
. FAN control
This detects the FG of the FAN, and controls the number of rotations. The number of rotations is set in
accordance with the internal temperature.
. Thermal sensor
The thermal sensor is placed at the lower part of the power board, and the internal temperature is mea-
The thermal sensor is placed at the lower part of the power board, and the internal temperature is mea-
sured.
1-12
VPL-BW7
Ballast drive block
This drives the ballast in synchronization with the input signal. The synchronous circuit is formed by the
microprocessor.
When the lamp mode is standard, ballast is driven in synchronization with the frequency 1.5 times higher
than that of the input signal. When the lamp mode is high, the ballast is driven in synchronization with the
input signal.
This drives the ballast in synchronization with the input signal. The synchronous circuit is formed by the
microprocessor.
When the lamp mode is standard, ballast is driven in synchronization with the frequency 1.5 times higher
than that of the input signal. When the lamp mode is high, the ballast is driven in synchronization with the
input signal.
RS232C block
This is used to connect the PW-190 via the RS232C driver/receiver IC. Because the number of serial ports
is limited on the PW-190, the RS232C and network cannot be used at the same time. The RS232C block
is equipped with the circuit that switches them.
This is used to connect the PW-190 via the RS232C driver/receiver IC. Because the number of serial ports
is limited on the PW-190, the RS232C and network cannot be used at the same time. The RS232C block
is equipped with the circuit that switches them.
Sensor Board:
The sensor boards include the thermal sensor board, lamp cover switch board, fi lter door switch board,
and IR sensor board.
and IR sensor board.
Power Board:
This supplies the lamp power and the system power. For the system power,
+15.25 V, +12 V, and +5 V
are output, and the circuit power is generated on the main board.
1-13
VPL-BW7
1-7. Replacing
Fuse
w
The fuse is essential parts for safe operation.
Replace the components with Sony parts whose part numbers appear in the manual published by Sony. If
the components are replaced with any parts other than the specifi ed ones, this may cause a fi re or electric
shock.
The fuse is essential parts for safe operation.
Replace the components with Sony parts whose part numbers appear in the manual published by Sony. If
the components are replaced with any parts other than the specifi ed ones, this may cause a fi re or electric
shock.
c
If the fuse is replaced while the main power is kept on, this may cause electric shock.
Before replacing the fuse, not only turn off the POWER switch but also disconnect the AC power cord
that is connected to the AC IN connector.
If the fuse is replaced while the main power is kept on, this may cause electric shock.
Before replacing the fuse, not only turn off the POWER switch but also disconnect the AC power cord
that is connected to the AC IN connector.
This unit is equipped with fuses.
The fuses blow if an excessive current fl ows due to abnormality inside the equipment. If fuses blow, turn
off the main power of the equipment once, and inspect inside of the equipment and remove the cause of
excessive current. After that, replace the fuses. (Refer to Section 1-3-4.)
The fuses blow if an excessive current fl ows due to abnormality inside the equipment. If fuses blow, turn
off the main power of the equipment once, and inspect inside of the equipment and remove the cause of
excessive current. After that, replace the fuses. (Refer to Section 1-3-4.)
Board
Ref. No. (Address)
Part No./Name
POWER F601
! 1-576-233-51 Fuse 6.3 A, 250 V
F602
! 1-576-973-11 Fuse 2 A, 600 V
Fuse (H.B.C.)
(F601)
(F601)
Miniature fuse-links (F602)
Power board
1-14
VPL-BW7
1-8. Connecting/Disconnecting the Flexible Card Wire
m
. Be very careful not to fold the fl exible card wire. Life of fl exible card wire will be signifi cantly short-
. Be very careful not to fold the fl exible card wire. Life of fl exible card wire will be signifi cantly short-
ened if it is folded.
. The fl exible card wire has the conduction side and the insulation side. If the conduction side and the
insulation side are connected in the wrong direction, the circuit will not function.
. Insert the fl exible card wire straight.
. Ensure that the conduction surface of the fl exible card wire is not contaminated.
. Ensure that the conduction surface of the fl exible card wire is not contaminated.
Disconnecting
Life portions A of the connector to unlock, and disconnect the fl exible card wire.
Connecting
1. Insert
the
fl exible card wire fi rmly as far as it will go, with the conduction side up.
2. Push portions A of the connector to lock.
1-9. Lead-free
Solder
Boards requiring use of lead-free solder are printed with a lead free mark (LF) indicating the solder
contains no lead.
(Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular
size.)
contains no lead.
(Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular
size.)
: LEAD FREE MARK
m
. Be sure to use the lead-free solder for the printed circuit board printed with the lead free mark.
. The lead-free solder melts at a temperature about 40 dC higher than the ordinary solder, therefore, it is
. Be sure to use the lead-free solder for the printed circuit board printed with the lead free mark.
. The lead-free solder melts at a temperature about 40 dC higher than the ordinary solder, therefore, it is
recommended to use the soldering iron having a temperature regulator.
. The ordinary soldering iron can be used but the iron tip has to be applied to the solder joint for a slightly
longer time. The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so
be careful.
be careful.
Connector
Disconnecting
Conduction
side
side
Portion A
Portion A
Flexible card wire
Connector
Flexible card wire
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