Fender Bassman 100T Instrucciones De Funcionamiento página 10

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Please see the block diagram of the Bassman 100T amplifier
circuitry on page 11 for reference.
PROBLEM: I cannot hear any sound coming out of my Bassman®
100T, 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 Bassman 100T.
• 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 1210
PART NUMBERS: 2249100000 (120V, 60Hz)
2249105000 (220V, 50Hz) ARG
POWER: REQUIREMENTS: 350W
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 (P/N: 2249200000)
TUBES: Four 6L6GC (P/N: 0072929000);
FUSES: 100V–120V VERSIONS: F 8A L, 125V (Main); Two T100mA L, 250V (Power Tubes)
ACCESSORIES (INCLUDED): FOOTSWITCH: 1-button, Vintage (P/N: 0057172000)
DIMENSIONS: HEIGHT: 10 in (25.4 cm)
10 10
Troubleshooting 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 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 or no signal is present
from XLR (POST position) jack {AA} in 'SILENT RECORD' mode.
SOLUTIONS: Power amp driver tube V3 (12AT7) has failed. Replace
V3 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.
TIP: 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
2249101000 (110V, 60Hz) TW
2249106000 (230V, 50Hz) EUR
OUTPUT: 100W 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 (P/N: 2249300000)
One 12AT7 (P/N: 0023531000);
WIDTH: 24.5 in (62.2 cm)
Product specifications are subject to change without notice.
fender.com
2249103000 (240V, 50Hz) AUS 2249104000 (230V, 50Hz) UK
2249107000 (100V, 50/60Hz) JPN 2249109000 (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 (P/N: 2249400000) Bassman 115 (P/N: 2249500000)
Two 12AX7A (P/N: 0013341000);
220V–240V VERSIONS: F 4A L, 250V (Main); Two T100mA L, 250V (Power Tubes)
DEPTH: 10.63 in (27 cm) WEIGHT: 48.5 lb (22 kg)