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© 2018 Sound City® Amplification. All rights reserved. Specifications subject to change without notice.
TROUBLESHOOTING GUIDE
Product specifications are subject to change without notice.
SPECIFICATIONS
MODEL: SC20 Combo
MODEL NUMBER: SC20C
POWER REQUIREMENT: 100W
POWER OUTPUT:
20W RMS @ 5% THD, 1kHz sine into 8Ω
INPUT IMPEDANCE: 470KΩ
OUTPUT IMPEDANCE: 8Ω
FUSE:
100V UNITS: MAINS
F2.5A, 250V.
120V UNITS:
T2A, 250V.
220V-240V
UNITS: F1A, 250V.
DIMENSIONS:
HEIGHT:
16 ¾ in (42.5 cm)
WIDTH:
20 ½ in (52 cm)
DEPTH:
8 ⅜ in (21 cm)
WEIGHT: 35 lb (16 kg)
WON’T TURN ON
1. Make sure AC cord is securely connected at both
ends.
2. Verify the power source with something you
know works.
3. Check the mains fuse, and replace if necessary. If
it blows again, refer to qualified service personnel.
NO SOUND
1. Check input cable.
2. Make sure the channel volumes are turned up.
3. Check speaker cable to see if it is disconnected
or shorted.
4. Check for a blown speaker.
5. Look at the preamp and power tubes to see if
they are lighting up.
RUNNING HOT
1. Make sure that the unit has adequate ventilation.
2. Make sure that the speaker is plugged in the
correct output jack.
3. Power tubes may be drawing excessive current
(refer to qualified service personnel).
DISTORTION
1. Check the impedance setting.
2. Check the speaker cable for shorts.
3. Check the speaker.
4. Check the signal level at other devices in the
signal path.
5. Power tubes may be weak (refer to qualified
service personnel).
BLOWING MAINS FUSE
1. Bad power tube or other internal power supply
component (refer to qualified service personnel).
