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PRODUCT INFORMATION BULLETIN PIB # 351402

PDP- 425CMX – Fan Control

Data provided by James Liu & Jerry Backstrom Page 1 of 2 Updated: 22 May 2006

Pioneer Electronics (USA) Inc. ,Product Management & Technical Support

BACKGROUND:

The fans in the PDP-425CMX professional plasma display panel are designed for a wide range of

environments; from quiet and often cool locations such as museums and corporate conference rooms to

boisterous spots like bars and retail stores. The fans respond to the internal temperature but are heavily

affected by the installation site. In warm locations, the fans turn on frequently to cool the panel’s

electronics while installations with moderate temperatures require less fan activity.

Some factors that influence fan activation are the mounting orientation (vertical or portrait positioning,

angled using a ceiling mount, etc.) and whether a communication card is inserted in a panel slot. The

plasma display readily recognizes cards from Pioneer so these cards have little to no effect on the

panel’s internal temperature. Cards from other manufacturers may raise the temperature. Internal logic

adjusts the automatic fan activation for the various mounting options and card types.

Occasionally, fan sound may change noticeably in pitch. As the internal temperature changes, the fans

slow down or speed up as needed. This pitch fluctuation is normal and part of the 30-second lag between

fan rotation adjustments.

Although the internal temperature may fall below the standard operating range, the fans remain ON,

rotating at a very low speed. Again, this is normal for the panel. Avoid manually turning fans OFF as

unmonitored/uncontrolled internal temperatures can damage the panel or the installation site.

DETAILS:

As an added card increases the panel’s internal temperature, the fans rotate faster and more frequently.

The chart below indicates the affect card types have on fan rotation.

Automatic Fan

Rotation

No Card or a

Pioneer Card

Card From Another

Manufacturer

Fan Off ↔ Low 154° F (68° C) 131° F (55° C)

Fan Low ↔ Medium 158° F (70° C) 149° F (65° C)

Fan Medium ↔ High 165° F (74° C) 156° F (69° C)

Abnormal Temperature*

180° F (82° C) 180° F (82° C)

*Abnormal temperatures cause the panel to automatically shut down.

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Seite 1 - PIB # 351402

PRODUCT INFORMATION BULLETIN PIB # 351402 PDP- 425CMX – Fan Control Data provided by James Liu & Jerry Backstrom Page 1 of 2 Updated: 22 Ma

Seite 2 - ADDITIONAL INFORMATION:

PIB # 351402 Data provided by James Liu & Jerry Backstrom Page 2 of 2 Updated: 22 May 2006 Pioneer Electronics (USA) Inc. ,Product Managemen

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