Yamaha Electone GX-1 Service Manual page 20

GX-1 (S/# 5030 ~ )
Contents of Circuit Board
Circuit Board Contents Location
'KS
* Key Voltage Ladder Network
* Key Voltage Gate Circuit
* Key Voltage Buffer Circuit
* Tuning Control Circuit for Portamento Keyboard
on the Panel 2
SM
* One Preset Tone Selector Button Selection and
Memory Circuit (One channel 10 pcs.)
* 10.6V DC Supply Control Circuit
* Lamp in the Preset Tone Button Driving Circuit
on the Keybed
PB * UK Sub Oscillator Signal Buffer Amplifier for VCO
in M Circuit Board
* UK Sub Oscillator Signal Buffer Amplifier for VCF
in M Circuit Board
* UK Sub Oscillator Signal Buffer Amplifier for VCA
in M Circuit Board
* LK Sub Oscillator Signal Buffer Amplifier for VCO
in M Circuit Board
* LK Sub Oscillator Signal Buffer Amplifier for VCF
in M Circuit Board
* LK Sub Oscillator Signal Buffer Amplifier for VCA
in M Circuit Board
* UK Sub Oscillator Cancel Circuit with Foot Switch
* LK Sub Oscillator Cancel Circuit with Foot Switch
* Buffer Amplifier for Panel Effect Levers
(15 circuits)
* Single Preset Tone Button Selection and Memory
Circuit for Overtone
on the Keybed