Yamaha Electone GX-1 Service Manual page 2

INTRODUCTION |
This manual contains service information for the Synthesizer
Electone GX-1.
This model is the fully using sillicon transistors (NPN and PNP
type) and Integrated Circuits (and or LSI). Take special care to the
following points before making any service:
1) Check the main voltage and cycles of the organ and ascertain
if they are correctly adjusted to the electric power supply in
the area where the organ is used.
\f higher voltage is applied to the organ by mistake, transis-
tors and or ICs will be inevitable distroyed.
2) Correct voltage and polarity should be observed when using a
tester (VOM) in order to avoid damage to transistors, ICs and
FETs:
3) Turn the organ off during disassembly and parts replacement.
Recheck all work before applying power.
Transistors and ICs are very unforgiving and destruction is
immediate.
4) When replacing Integrated Circuit be very careful not to
apply excessive heat, proper heat sinking devices should be
used.
5) Before replacing an Integrated circuit, always disconnect its
output connections and recheck for a signal.