212223242526282927212223242526282927 Chassis Layout Rear 212223242526272829 Fuse and Power Cord – Make sure to replace fuse with same type and rating. Footswitch Jack – The footswitch cable plugs in here. Uses a standard MIDI/sync cable. EFX / RVB Footswitch Jack – A .-inch TRS input that connects to a standard dual latching footswitch such as the Traynor TFS-2. The reverb or the effects in all three channels can be defeated via this footswitch. Send / Rtn Jacks – .-inch phone Input and Output jacks with controllable effects send. The return is controlled by the individual channel returns on the front panel. Amp In / Pre Out Jacks – Can be used as a loop-thru for connecting pedals. D.I. / Headphone Outputs – Outputs with simulated speaker compensation. They can be used for recording or for silent practicing. They remain active when the amplifier is in standby mode. Speaker Outputs / Impedance Selector – Connect your speakers here. Make sure that your speakers are properly connected before operating the amplifier and that the impedance selector is set to the proper position for matching up to the speakers. Amplifier Mode Switch – The YCS100 can be operated in either 100-watt Class AB mode or in 30-watt Class A mode. Tuner Out – This jack provides a buffered output from the guitar and remains active when the tuner mute switch on the front panel is depressed. • QUALITY&INNOVATION• • ESTABLISHED1963• Channel 1 Channel 1 is the lead/overdrive channel and is selected in one of two ways, via the Channel Select switch on the control panel, or via the Channel 1 Select button on the supplied footswitch pedal. The red LED, located next to the Channel 1 Select Switch illuminates when Channel 1 is active. Gain & Volume Controls 4 Channel 1 uses a Gain control in conjunction with a Volume control to control the amount of tube-based overdrive and volume. The Gain control is used to adjust the amount of overdrive, while the Volume control allows you to set the actual volume of the channel. Boost Switch 5 A boost circuit is provided to help achieve more overdrive for leads. The boost can be selected via the front panel switch. A red LED illuminates to indicate when the boost is active. Channel 1 Tone Controls 7 The Treble, Bass, and Middle tone controls help shape your sound. These controls are post-gain and pre- volume and are active only when Channel 1 is selected. Modern Switch 8 The Modern switch controls the frequency range that the tone controls work in. You can choose from a more vintage sound with emphasis on the midrange or a slightly deeper modern sound. The green LED above the switch indicates that you are in modern mode. Scoop Switch 9 The Scoop provides deep midrange cut with a bass boost to get that deep, chunky sound. A yellow LED indicates when you are in the Scoop mode. Reverb Return 11 The Reverb Return controls the amount of reverb return from the internal Accutronics® spring reverb tank. This control is active only when Channel 1 is active. Effects Return 12 This controls the amount of return signal from the external effect plugged into the rear panel EFX RTN jack. This control is active only when Channel 1 is active. Channel 3 Channel 3 is the clean channel; it has one less gain stage available. All of the functions remain the same as Channels 1 and 2 with the exception that the Scoop function has been replaced with a Bright switch to add more sparkle to your clean sound. By incorporating the Boost switch, Channel 3 can also give you a variety of overdrive sounds as well. Master Controls Presence Control 13 The Presence Control shapes the overall brightness of all three channels. Resonance Control 14 The Resonance Control adjusts the damping factor of the speakers in the bass frequencies, helping loosen or tighten the bottom end. Turning the Resonance control up (clockwise) adds more rumble, turning it down (counter-clockwise) tightens up the bottom end. Solo Control 15 The Solo Control adjusts the amount of extra volume you can kick in via the footswitch or the panel mounted control. Master Volume 16 The Master Volume control adjusts the overall level of all three channels. Tuner Mute 17 The Tuner Mute switch cuts the amplifier, D.I. and headphone outputs. The Tuner Out jack will remain active for silent tuning of your guitar. Standby Switch & Indicator 1819 The Standby switch controls the high-voltage power being supplied to the output tubes only. Standby mode keeps the tubes warmed up when the amp is not in use. The large, jewel indicator on the front panel glows red when the amp is fully powered-up and changes to yellow when the high voltage circuit has been turned off (when in Standby mode). Putting the amp into Standby mode (i.e. during set breaks) shuts off the amplifier output stage and effectively increases tube life by reducing wear on the tubes. The pre-amp tubes remain active so that the D.I. and headphone outputs can be used for silent practice or for recording. You do not need to connect s...