Pioneer PDP-501MX Manuale di servizio sul campo - Pagina 30

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Symptom: Shuts down after 6 seconds. Gives no display.

Cure: Y Drive B board PD (power down) test point went high just before the unit shut down, but the problem was in one

of the scan boards connected to Y Drive A board. Troubleshoot by unplugging the scan assemblies one at a time. You

must leave power off at least a minute before reconnecting the scan board to allow charge to dissipate.

Models Covered: PDP501MX, PDPV501X

Tip Date: October 10 2000

The Tech Name: Bernie Shelton

Symptom: When replacing the protective panel, page 8, #4,

Cure: you must also replace the "Panel Cushions" and "Shield Gaskets" because the are sticky and can't be removed

from the old protective panel.

Models Covered: PDP501, PDPV501

Tip Date: May 12 2000

The Tech Name: Bernie Shelton

Symptom: Troubleshooting procedure for P.D.

Cure: Check for PD pulse at Power Supply connectors- P4 pin 8 (Temp_PD), P12 pin 5 (X Drv A), P12 pin 7 (X Drv B), P6

pin 8 (Y Drv A), and P6 pin 10 (Y Drv B). (P2 pin 9 is labeled PD AU, but is not connected to anything on the U -CON

Assy.)

Models Covered: PDP501MX, PDPV501X

Tip Date: December 20 1999

The Tech Name: Dennis Walden

Symptom: When replacing the U-Com Assy AWV1689, some original PCB's did not have a connector for E15 (3 wires

from Side Sw Assy). The wires may be soldered to the PCB.

Cure: The new PCB is different. There are 3 solder pads located next to E13 connector labeled Blue Wire, White Wire,

and Red wire.

Models Covered: PDP501MX, PDPV501

Tip Date: December 14 1999

The Tech Name: Dennis Walden

Symptom: Power LED comes on in Green when main pwr is applied, but no video or OSD.

Cure: Listen for noise level of unit to drop after a few seconds. Unit is shutting down. Troubleshooting in s/m is

incorrect. Display LED will not blink. See Diagnosis on page 83 and PD Block on page 85.

Models Covered: PDP501MX, PDPV501X

Tip Date: December 01 1999

The Tech Name: Dennis Walden

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