C Check of indoor electronic control P.C. board and indoor fan motor

Turn OFF the power supply.

Remove indoor fan motor connector CN211 and vane motor connector CN151 from the indoor electronic control P.C. board and turn ON the power supply.

Does the unit operate with the remote controller? Does OPERATION INDICATOR lamp light up by pressing EMERGENCY OPERATION switch?

No

Turn OFF the power supply.

Check both “parts side” and “pattern side” of the indoor electronic control P.C. board visually.

Measure the resistance between

 

 

 

 

 

Short/open circuit:

CN211 and of the indoor fan motor

 

 

 

 

Replace the indoor fan motor.

connector.

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

Measure the resistance of the horizon-

 

 

Short/open circuit:

tal vane motor coil.

 

 

Replace the horizontal vane motor and the

 

 

(Refer to 8-5.)

 

 

indoor electronic control P.C. board.

 

 

 

 

Replace the indoor electronic control P.C. board.

Yes

Are the varistor (NR11) burnt and the fuse (F11)

blown?No

Be sure to check both the fuse and the varistor in any case.

Is the fuse (F11) blown

only?No

Yes

Measure the resistance between

(+)and (-) of the indoor fan motor connector (to CN211 on the indoor electronic control P.C. board). 1, 2

Is the resistance 1 MΩ

or more?

No

Yes

1. The fan motor connector's lead wire is red, whereas is black.

2. Connect "+" of the tester to fan motor connector's lead wire, and "-" to lead wire, otherwise the resistance can- not be measured properly.

Replace indoor electronic control P.C. board and the indoor fan motor.

Replace indoor electronic control P.C. board.

Measure the resistance of cement resistor (R111) on the indoor elec-

tronic control P.C. board.

Is the resistance approx.

 

4 Ω?

No

 

Yes

 

 

 

 

 

 

Replace the indoor electronic control P.C. board and the indoor fan motor.

Indoor electronic control P.C.Board

Varistor(NR11)

Fuse(F11)

CN211

Replace the indoor electronic control P.C. board.

20

Page 20
Image 20
Logitech OB450 REVISED EDITION-B, MSZ-A09NA service manual Indoor electronic control P.C.Board

MSZ-A09NA, OB450 REVISED EDITION-B specifications

The Logitech MSZ-A09NA, OB450 Revised Edition-B stands as a testament to professional-grade technology, designed for both home and office productivity. This advanced device combines functionality with sleek design, making it an essential tool for users demanding efficiency and performance.

At its core, the Logitech MSZ-A09NA is equipped with state-of-the-art input technologies that enhance user experience. Whether you are a gamer, an avid typist, or a creative professional, this model caters to diverse needs. The mouse features an ergonomic shape that allows for hours of comfortable use, while the advanced optical sensor ensures precision tracking on various surfaces.

One of its standout features is the customizable button layout. Users can program each of the additional buttons to suit specific tasks, making it an ideal choice for gamers who require quick access to critical commands or professionals who benefit from application shortcuts. The mouse supports multiple profiles, allowing for seamless transitions between different user preferences.

Connectivity is another significant strength of the Logitech MSZ-A09NA. The device offers both wired and wireless options, ensuring versatility for any setup. The wireless connection is powered by Logitech’s advanced technology, providing a reliable link without the clutter of cables. With a battery life that can last weeks on a single charge, this mouse eliminates the need for frequent interruptions.

Moreover, the OB450 Revised Edition-B features RGB lighting that can be customized through Logitech’s software. This not only enhances aesthetic appeal but also allows users to create personalized lighting effects that can match their workspace or reflect their personal style.

Durability is a hallmark of the Logitech MSZ-A09NA, built with high-quality materials that can withstand extensive daily use. The mouse buttons have been rigorously tested to ensure they stand the test of time, making it a worthy investment for any user.

In summary, the Logitech MSZ-A09NA, OB450 Revised Edition-B excels in providing a blend of comfort, customization, and connectivity. Its thoughtful design and advanced technology make it an exceptional choice for anyone looking to enhance their computing experience. Whether for professional work, gaming, or everyday tasks, this mouse is equipped to meet the demands of modern users, offering both reliability and style.