Pioneer PDP-434CMX Service Manual page 5

5
Charged Section
The places where the commercial AC power is used without
passing through the power supply transformer.
If the places are touched, there is a risk of electric shock. In
addition, the measuring equipment can be damaged if it is
connected to the GND of the charged section and the GND of the
non-charged section while connecting the set directly to the
commercial AC power supply. Therefore, be sure to connect the
set via an insulated transformer and supply the current.
1. Power Cord
2. AC Inlet with Filter
3. Power Switch (S1)
4. Fuse (In the POWER SUPPLY Unit)
5. STB Transformer and Converter Transformer
(In the POWER SUPPLY Unit)
6. Other primary side of the POWER SUPPLY Unit
50 inch model
: Part is Charged Section.
: Part is the High Voltage Generating Points
other than the Charged Section.
50 SCAN B Assy 50 Y DRIVE Assy
50 SCAN A Assy
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6
Fig.1 Charged Section and High Voltage Generating Point (Rear view)
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7
High Voltage Generating Point
The places where voltage is 100 V or more besides the live parts
are described above. You must not touch them, since there is risk
of electric shock.
The VSUS voltage remains for several minutes after the power to
the unit is turned off. These places must not be touched until
about 10 minutes after the power is turned off, or it is confirmed
with a tester that there is no residual VSUS voltage.
1. POWER SUPPLY Unit.....................................................(223V)
2. 50 X DRIVE Assy ...........................................(–230V to 223V)
3. 50 Y DRIVE Assy ...........................................................(353V)
4. 50 SCAN A Assy ............................................................ (353V)
5. 50 SCAN B Assy ............................................................ (353V)
6. X CONNECTOR A Assy ................................(–230V to 223V)
7. X CONNECTOR B Assy ............................... (–230V to 223V)
Discharge the VSUS voltage, as shown below:
[Method for discharging the VSUS voltage]
1. Set DRF_SW on the DIGITAL VIDEO Assy to ON (Drive
OFF status). ∗1, ∗2
2. Leave the switch at that position for about 20-30 seconds.
3. If the power is on, turn it off. Then return DRF_SW to the OFF
position. ∗3
Notes
∗1: You can also set the unit to "Drive OFF status" by sending the
"DRF" RS232C command from the PC.
∗2: DRF_SW can be switched whether the power is on or off.
∗3: Power-down will occur if DRF_SW is set to OFF while the
power is on. (See "7.1.5 POWER ON/OFF FUNCTION FOR
THE LARGE-SIGNAL SYSTEM".)
POWER SUPPLY Unit
Power Switch
AC Inlet with Filter
(S1)
PDP-504CMX/1
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8
X CONNECTOR B
50 X DRIVE Assy
Assy
X CONNECTOR A
Assy
Power Cord
8
A
B
C
D
E
F
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