(4/5)
IC1
8J11
MS4559-52H REV.A
MADE IN JAPAN
MCU
No.1 Pin
4. Insertion Direction of MCU and cleaning of IC socket
4.1 Insertion Direction of MCU
When MCU is inserted, No.1 pin of the IC socket on MS4559-52H and MCU’s No.1 pin should be connected.
The wrong insertion would cause a serious breakage of MCU.
Insertion direction of MCU is shown in Fig.4.1.
Fig.4.1 Insertion Direction of MCU
4.2 Cleaning of IC Socket
A contact pin inside of the IC socket of the MCU unit might deteriorate and a contact failure might occur
because of the number of times used and its age of service. As the contact failure may cause incorrect
writing of MCU and malfunction of the writer, please take the below measures.
Though enquiries on contact failures can be made, we regard IC sockets as consumable supplies. We may
recommend you to replace them if a contact failure of IC socket occurs due to its use deterioration.
【Recommended item for cleaning】
About the cleaning of the contact pin in the IC socket, we recommend the use of the nanotech brush (Kita
Mfg Co.,Ltd).
The nanotech brush can remove the dirt which stuck to a contact pin, a very small amount of metastasis of
solder. When a contact poor problem occurred, please try it.
About nanotech brush, please ask us or Kita Mfg.Co.Ltd (refer to the following site).
Nanotech brush (Kita Mfg Co., Ltd.) http://www.kita-mfg.com/pro_nanotech_e.html
(i) Please clean the contact pin surface inside of IC socket with a brush, etc. regularly, depending
on the number of times used.
(ii) If the product is not to be used for a long period, please keep it with less humidity in a
plastic bag, etc.
Measures against IC Socket Contact Failure