Yamaha g30 112 series i a service manual
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Extracted text from yamaha g30 112 series i a service manual (Ocr-read)
Page 1
* «use.
630-112 (s/# 4801~l
ISPECIFICATIONS
Output Power 30 Watts RMS @ 3% THD 8 ohms
40 Watts RMS @ 10% THD 8 ohms
Speaker 30 cm (12") x 1 JA3059
Input Sensitivity HIGH : -34 dBm @ 1KHZ (Volume & Tone Controls at max.)
LOW :-28 dBm
Input Impedance HIGH : 1M ohms
LOW : 130K ohms
Head Phone Terminal -7 dBm @ 1KHZ/8 to 150 ohms head phone
Controls Volume
Bass, Treble, Bright
Distortion
Reverb
Foot Switch Jack Distortion
Reverb
Semi-Conductor in use Transistors 14
FET 2
Diodes 9
Rated Voltage AC 100V
Rated Frequency 50/60 Hz
Rated Power Consumption 30 Watts
Dimensions 450 (H) x 500 (W) x 200 (D) m/m
Weight 12.6 kg
Finish Black leatherette
Specifications subject to change without notice.
Name of the Parts
Pilot Lamp
Power Switch
Distortion Control
Reverb Control
Bright Control
Treble Control
Bass Control
3 YAMAHA
Normal Input Jack
High Sensitivity Input Jack
Fuse Holder (1.5A 250V)
Head Phone Connection Terminal
Reverb Foot Switch Connection Terminal
Distortion Foot Switch Connection Terminal
Page 2
T- a-
630112 (S/# 4801~) 2.
IDISASSEMBLY
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Amp. Unit Removal (Used the Figure in this section)
A. Remove the 6 screws (marked 0) and remove the back cover.
B. Remove the 4 screws fixing the Amp. unit (See Fig. 2) and slide out the unit. Before slide
out the unit, disconnect the speaker cord from the speaker terminal.
Fig 2