EasyManuals Logo
Home>Tait>Accessories>T855

Tait T855 User Manual

Tait T855
370 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #276 background imageLoading...
Page #276 background image
D4.12
T858/859 Fault Finding
M850-00
31/09/98 Copyright TEL
4.6.5 T859 Fan Control Circuitry
Key transmitter.
Does fan run at
room temperature?
Spray "freeze" on R116
or short R113.
Does the low temperature
inhibit circuit stop the fan?
Spray "freeze" on R116
OR short R113.
Check IC3 pin 14 >11V.
Check Q21 & Q20.
N
N
Y
Y
Check Q20 & Q21 collector
voltages. Check Q17 & Q18.
Check IC3 pin 14 <1V.
Check Q19.
Check Tx-key is low (at ground).
Do not key
transmitter.
Does high temperature control
circuit activate fan?
Heat R72 with tip
of soldering iron.
Check IC3 pin 8 >11V.
Check Q21 & Q20.
Fan control OK.
Heat R72 to >70°C with
tip of soldering iron.
N
Y

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Tait T855 and is the answer not in the manual?

Tait T855 Specifications

General IconGeneral
BrandTait
ModelT855
CategoryAccessories
LanguageEnglish

Related product manuals