RPM HHV-448/458 High Voltage Board Replacement

Use orange safety (traffic control) cones or equivalent per site-specific safety practices. 

Move LD-260 switch to OFF position. The PWR ON LED will turn off.

Connectors are disconnected by turning lock ring multiple times and then pulling straight down.

Normally the cover screws are “captured” and should not come out of the cover.

To prevent breaking the hinge on the module / door, once the retainer screws are loosened, take care to gently pull the bottom of the cover away from the module approximately ¼” before letting the door open.

The screws to be removed are located in the bottom of the irregularly shaped hole next to the round hole. Insert the long shaft small Phillips screwdriver into each of the four corner pockets and loosen/remove screws.

J8 and J11 should be labeled; write J6 and J10 on the appropriate connector in permanent marker.

J8 and J11 should be easily removed by grasping the connector and pulling it out with a gentle rocking motion.

J10 is locked in place by the position of J6; remove J6 first.

BNC connectors are attached to the SCA-774 board and easily slide down then out of the SCA-775 box. 

Using a small Phillips screwdriver, remove screws at four corners.

Etiket veya bant kullanın. Çıkarıldığı tarihi, arıza belirtilerinin açıklamasını, ülkeyi, sahayı ve şerit numarasını ekleyin. Nükleer Kaçakçılık Tespiti ve Caydırıcılık (NSDD) kılavuzuna veya sözleşme gereksinimlerine göre imha edin.

Do not twist wires by hand

Match wires and splice (intermingle) wire strands to form butt joint.

Starting at center, gently distribute heat to ends until the inner tube is fully reduced and the rest of the tube fits to the wire. 

Pull on wires to verify good connection.

Use screws previously removed.

Ensure all pins are engaged. It is easy to install the connectors one pin off in either direction. 

Install all screws loosely at first to facilitate easy mounting, then carefully but firmly tighten all four screws. 

The cable connectors are different sizes and keyed so they cannot be reinstalled incorrectly. 

Move LD-260 switch to ON position. The LED PWR ON will illuminate.

RPM will perform a power on self-test (POST) and collect a background radiation measurement.

Enter Program Mode by pressing "0"

Press 01234#

Then, press 2: GAMMA > 2: FUNCTIONS > 1:SHOW COUNTS

On SC-770, press 01234#

Then, press 2: NEUTRON > 2: FUNCTIONS > 1: SHOW COUNTS.

DET-RPM-RAP-CM01, RPM Electronic Alignment Procedure.

Düzeltici Bakım Raporu için gözlemleri, zamanları ve sonuçları kaydedin.

As specified by management or contractual obligations.