Pioneer PDP-5050SX Service Manual page 141

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[Clearing the data in the ROM of the DIGITAL VIDEO Assy]
After either YES or NO is selected on the display shown above, the indication shown below is automatically displayed. Move the cursor to
YES then press the Enter key. The data in the ROM of the DIGITAL VIDEO Assy become those for a service part (not adjusted).
Notes: • Use this operation after the DIGITAL VIDEO Assy in failure is repaired and is to be reused as a service part.
• In normal replacement of the Assy with a new service part, this operation is not required. Select NO after replacement with a
service part.
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I N F O R M A T I O N
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D I G I T A L
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When either YES or NO is selected on the above display, the display will automatically return to that for status
confirmation shown above.
Miscellaneous
If the white balance (W/B) value is largely shifted because of aging, etc., W/B adjustment is required. (As this may be a rare
case, the adjustment procedures are described below, just for your reference.)
[ W/B-adjustment procedures ]
The W/B adjustment can be performed with the RS-232C commands. The Minolta CA-100 color difference meter is required.
1 Set the keyword for the DIGITAL VIDEO Assy to "not adjusted" with the "UAJ" RS-232C command.
2 Obtain the current adjustment values in the two adjustment tables (see "6.7 List of RS-232C commands").
• Shifting to Table 1: Send the "MSK S51" and "F60" commands. Obtaining the adjustment values: Send the "GPW"
command.
3 Make settings for various functions.
Send the "PPN," "SDN," "SPN," and "WAY" commands.
Note: After adjustment, when the POWER switch is set to OFF, these settings will be reset to the initial values.
4 For each table, set the brightness.
• Adjustment in Table 1: After sending the "F60" command, perform adjustment.
For each table, change the RGB parameters so that the values measured using a Minolta color difference meter (CA-100)
become as indicated below. In this case, any one of PRH, PGH, or PBH must be set to 256.
Right side of Mask H
x 285
y 289
5 Check after adjustment
• Shifting to Table 1: Send the "F60" command. Obtaining the adjustment values: Send the "GPW" command.
Check that the adjustment data have been changed.
6 Change the keyword for the DIGITAL VIDEO Assy to "adjusted" by sending the "FAJ" RS-232C command.
Note: Use a Minolta CA-100 color difference meter or the equivalent for measurement. Otherwise, the specifications of the product cannot be
assured.
Note: To cancel adjusted data and return to the values before adjustment, send the "BCP" RS-232C command. Turn the AC
power off then turn it back on before setting the unit to Standby OFF. The backup values are then retrieved.
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V D 1 – 1 3 1 – N T V – A T O
E E P R OM
S E R V I C E P A R T S ?
Y E S N O
"PRH***" : 000 - 511
"PGH***" : 000 - 511
"PBH***" : 000 - 511
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