Fender Super Bassman Instrucciones De Funcionamiento página 6

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Please see the block diagram of the Super Bassman amplifier
circuitry on page 6 for reference.
PROBLEM: I cannot hear any sound coming out of my Super
Bassman, but my instrument is plugged in and the power to the
amplifier is turned on and the red jewel (L) on the front is glowing.
SOLUTIONS:
• Make sure the VOLUME knobs (B and G) and MASTER Volume (K)
are set above 1.
• Make sure that the MASTER Volume knob (K) is pressed in (defeat
"MUTE").
• Make sure the STANDBY switch (N) is in the up position.
• Check the position of switch (Q).
• If outboard gear is connected in the effects loop (W) (between
PREAMP OUTPUT and PWR AMP INPUT) make sure it is turned
on and functioning. If unplugging the cable from the PWR AMP
INPUT jack solves the problem, the problem is in the outboard
gear in the effect loop, not with the Super Bassman.
• Check the status of the OUTPUT tubes on the Automatic Bias
panel (T). If there are problems with the output tubes, refer
to the 'Fender Automatic Bias' section for further instructions
troubleshooting tubes.
• Verify that the speaker cable is connected properly between the
MAIN SPEAKER jack (R) and the speaker cabinet.
• Try replacing the speaker and instrument cables.
• Try a different instrument.
If none of these solutions solve the problem, investigate the pre-
amp tubes (see below).
PROBLEM: No sound is coming from the amplifier when the
instrument is connected to INPUT (A), but the amplifier DOES work
when connecting the instrument directly into the POWER AMP
INPUT (W).
SOLUTIONS: One of the preamp tubes V1 or V2 (both 12AX7) is
bad. If the amplifier works normally in the VINTAGE channel, but
does not work properly in the OVERDRIVE channel (unless BLEND
(F) is set to 1), replace preamp tube V2 with a new tube. Otherwise,
replace preamp tube V1 with a new tube.
TYPE PR 1160
PART NUMBERS 2249000000 (120V, 60Hz)
2249005000 (220V, 50Hz) ARG
POWER REQUIREMENTS: 900W
INPUT IMPEDANCES INPUT 1: >820kΩ
OUTPUT IMPEDANCES XLR OUT: 50Ω (balanced)
TONE CONTROLS VINTAGE BASS: 10dB range @ 40Hz (MID: 5, TREBLE: 5)
TONE CONTROLS OVERDRIVE BASS: ±15dB @ 80Hz (Deep: –18dB @ 640Hz)
SPEAKERS (RECOMMENDED)
Bassman 810 (PN: 2249200000)
TUBES Six Matched 6550C (PN: 0048489000);
FUSES 100V–120V VERSIONS: F 10A L, 125V (Main); Three T100mA L, 250V (Power Tubes)
ACCESSORIES (INCLUDED) FOOTSWITCH: 1-button, Vintage (PN: 0057172000)
DIMENSIONS HEIGHT: 10 in (25.4 cm)
Troubleshooting
PROBLEM: Amplifier feeds back creating a loud high-pitched
sound, even when no instrument is connected, and especially when
Volume, Gain, or tone controls are at high settings in either channel.
Or the amplifier creates unintentional ringing noises, which sound
like chimes, while playing certain notes. Or mechanical noises like
tapping on the amplifier chassis (i.e., with a pick or drumstick) are
picked up and amplified through the speakers.
SOLUTIONS: Preamp tubes are becoming microphonic. Replace
V1 and/or V2 (both 12AX7) with a new tube. If the problem only
occurs in the OVERDRIVE channel, try replacing V2 first.
PROBLEM: Signals are present and working normally in the
PREAMP OUT (W) and XLR (PRE or POST position) (AA) jacks and
Automatic Bias display (T) shows all output tubes are good (solid
green LEDs), but the Power amplifier lacks power and punch,
sounds different than normal, or produces no sound from speaker.
SOLUTIONS: Power amp driver tube V3 (12AX7) and/or V4 (12AT7)
has failed. Replace V3 with a new tube. If the amplifier still does not
produce sound, replace V4 with a new tube.
PROBLEM: One or more POWER TUBE SCREEN FUSES (BB) keeps
blowing, even after replacing with the same fuse type and rating
(T100mA L). AUTOMATIC BIAS display (T) indicates the offending
pair of tubes are bad (RED LEDs).
SOLUTIONS: One or both power tubes in the pair have failed.
Replace tubes with the same type and tube rating. Refer to 'Fender
Automatic Bias' section for instructions on on troubleshooting
failed power tubes.
PROBLEM: PRIMARY/MAINS FUSE (P) keeps blowing, even after
replacing with same type and rating.
SOLUTIONS: There is an electrical fault that needs servicing. Refer
amplifier to authorized service center for service by a qualified
technician.
TIP: Try replacing PRIMARY/MAINS FUSE (P) (with correct type and
rating) and turn POWER and STANDBY switches to ON, with all
POWER TUBE SCREEN FUSES (BB) removed. If fault is removed (fuse
does not blow), problem is likely one or more failed power tubes.
Refer to 'Fender Automatic Bias' section for instructions on on
troubleshooting failed power tubes.
Specifications
2249001000 (110V, 60Hz) TW
2249006000 (230V, 50Hz) EUR
OUTPUT: 300W into 8Ω, 4Ω or 2Ω @ <5% THD
INPUT 2: 136kΩ (-6dB)
TUNER: 220Ω (balanced)
MID: 15dB range @ 400Hz (BASS: 5, TREBLE: 5)
MID LEVEL/FREQ: ±18dB @ 200Hz to 3.3kHz
Bassman 610 (PN: 2249300000)
Three 12AX7A (PN: 0013341000);
WIDTH: 24.5 in (62.2 cm)
Product specifications are subject to change without notice.
5
2249003000 (240V, 50Hz) AUS 2249004000 (230V, 50Hz) UK
2249007000 (100V, 50/60Hz) JPN 2249009000 (220V, 60Hz) ROK
POWER AMP: 43kΩ (balanced)
PREAMP: 220Ω (balanced)
TREBLE: 9dB range @ 4kHz (BASS: 5, MID: 5)
TREBLE: ±15dB @ 4kHz (Bright: +10dB @ 6kHz)
Bassman 410 (PN: 2249400000) Bassman 115 (PN: 2249500000)
One 12AT7 (PN: 0023531000);
220V–240V VERSIONS: F 5A L, 250V (Main); Three T100mA L, 250V (Power Tubes)
DEPTH: 13.5 in (34.3 cm) WEIGHT: 65 lb (29.5 kg)