How to RS232 A5S
Step 1：Connect RS232 cable with PC and A5S.

A5S
RS232

DB-9
RXD ②
TXD ③
SGND ⑤

DB-9
RXD ②
TXD ③
SGND ⑤

Warning：No power When you do this.
Step2：Open STBTool_1.8

Step3：Select Port

Step 4：Press

PC

Step 5：Press

to select ri ght software

Select the right
*.bin

file

from

your disk

Step 6：Press

, Power On A5S now and waiting until finish.

Notice：
ONLY RED LIGHT WILL SHOW IN BOX WHEN UPGRADING.

POWER ON NOW WHEN
CONNECTION READY

A5S will AUTO-RESTART when finish.

Notice：
1.Shut Down Anti-Virus when u using RS232 tools.
2.Do it again if not success.