Tait TM8110 Service Manual

TM8100/TM8200 Service Manual Fault Finding of Control Head with Graphical Display 421
© Tait Electronics Limited June 2006
Several Keys Faulty The keys can be grouped into columns and rows of three or two keys, as
illustrated in Figure 14.11.
If one column of keys is faulty:
1. Visually inspect the associated resistor and diodes for open or shorted
circuits.
If one row of keys is faulty:
1. Visually inspect the associated resistor for open or shorted circuits.
F2 key
F4 key
scroll-up key
R620
D602
F1 key
right selection key
scroll-down key
R621
D620
F3 key
left selection key
R622
D604
F3 key
F4 key
right selection key
R623 scroll-up key
scroll-down key
left selection key
R624 F1 key
F2 key
R625
Figure 14.12 PCB layout of the function, scroll, and selection key circuitry
top side
bottom side

Tait TM8110 Specifications

General

Brand	Tait
Model	TM8110
Category	Radio
Language	English