Doss NF622, Instruction Manual

Your excellent helper in cable test!

08

Master unit loop continuity scan 
testing function

       Note

When performing master unit scan test, sequence of 
LEDs light up as below.LED#1 (Data 2

﹢)

→

 LED#10 

(Clock 

﹢)

→

 LED#S (Shield)

→

 LED#11 (Clock S).

※

Insert one of A type connector of cable to Master 

unit LOOPBACK (A Type) socket and insert the other 
one to Master unit MAIN (A Type) socket for test HDMI 
cable A type to A type.

※

Insert A type connector of cable to Master unit 

LOOPBACK (A Type) socket and insert C type 
connector of cable to Master unit Mini-HDMI (C Type) 
for test HDMI cable A type to Mini-HDMI (C Type).
1.Slide upper left switch to “MASTER” then “POWER” 
LED lights up, Master unit #1~19 and “Shield” LEDs will 
all light up with a long beep sound then all LEDs are off 
except “POWER”LED for saving power and the unit is 
ready for testing.

2

.

Push “TEST” button to perform master unit continuity 

scan test, it will continually scan 1~19 pin and shield 
conductor, Master unit #1~19 and Shield LEDs will light 
up in sequence fast, finally master unit LED will indicate 
testing result with sound as below. The testing result 
will keep 5 second then all LEDs are off except 
“POWER” LED for saving power. Press “TEST” 
button again for test.