Heathkit SB-104 User Manual

A
Counter Circuit Board
TROUBLESHOOTING CHART
SYMPTOM
Readout of preset frequencies
incorrect
(6606.4.6603.6.6604.3)
One digit incorrect.
Will not count (preset
frequency display OK).
POSSIBLE
CAUSE
1. Time base not running.
2. IC-112 thru IC-119.
3. 5V missing.
1. Associated counter IC.
2. Associated memory IC.
3. Display board connections.
~ ~
4. Chassis wiring.
1. Premix signal missing or
low in voltage.
2. Q101.
3. IC101.

Heathkit SB-104 Specifications

General

Brand	Heathkit
Model	SB-104
Category	Transceiver
Language	English