SYMPHONIC CST274FE
Instrukcja Serwisowa

soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6) (5) Release the flat pack-IC from the CBA using tweezers. (Fig. S-1-6) Note: When using a soldering iron, care must be taken to ensure that the flat pack-IC is not being held by glue. When the flat pack-IC is removed from the CBA, handle it gently because it may be damaged if force is applied.

2. Installation
(1) Using desoldering braid, remove the solder from the foil of each pin of the flat pack-IC on the CBA so you can install a replacement flat pack-IC more easily. (2) The "I" mark on the flat pack-IC indicates pin 1. (See Fig. S-1-7.) Be sure this mark matches the 1 on the PCB when positioning for installation. Then pre- solder the four corners of the flat pack-IC. (See Fig. S-1-8.) (3) Solder all pins of the flat pack-IC. Be sure that none of the pins have solder bridges.

Hot Air Blower

Example :
or Iron Wire

Soldering Iron To Solid Mounting Point Pin 1 of the Flat Pack-IC is indicated by a " " mark.

Fig. S-1-5

Fig. S-1-7

Presolder CBA Fine Tip Soldering Iron

Flat Pack-IC Tweezers CBA Fig. S-1-6 Fig. S-1-8 Flat Pack-IC

3-3

L14STA