Industrial Data Systems IDS 152 - Manual (Page 34)

5.4.2. MISSING DOT TROUBLESHOOTING.
Missing dots are caused by 1 or more of the following:
1. Broken needle.
2. Blown transistor.
3. Blown drive diode.
4. Blown fuse.
The table below lists the dot driver components in order of
dot position. If a dot is missing, check ALL of the
dot driver components for the missing dot.
DOT POSITION FUSE TXSISTOR DIODE DIODE
. 7 F7 Q7 CR17 CR28
. 6 F6 Q6 CR16 CR27
. 5 F5 Q5 CR15 CR26
. 4 F4 Q4 CR14 CR25
. 3 F3 Q3 CR13 CR24
. 2 F2 Q2 CR12 CR23
. 1 F1 Q1 CR11 CR22