Trem - O-Verb

TREM O VERB

FRONT PANEL

CHANNEL 1 (ORANGE) CHANNEL 2 (RED)Control Function Type Mesa Part# Control Function Type Mesa Part#Clean/Vin. Gain Switch 607101 Blues/Mod. Gain Switch 607101Gain Pot 592794 Gain Pot 592794

Knob 408110 Knob 408110Treble Pot 592738 Treble Pot 592738

Knob 408110 Knob 408110Middle Pot 593737 Middle Pot 593737

Knob 408110 Knob 408110Bass Pot 593739 Bass Pot 593739

Knob 408110 Knob 408110Presence Pot 592737 Presence Pot 593737

Knob 408110 Knob 408110Reverb Pot 592151 Reverb Pot 592151

Knob 408110 Knob 408110Master Pot 592739 Master Pot 592792

Knob 408110 Knob 408110Orange LED LED 395530 Red LED LED 395520

MISC PARTSControl Function Type Mesa Part#Input Jack 610120Ftsw Jack 610110Loop Act Mstr

Pot 593148Knob 408121

Loop LED LED 395550Tremolo

Depth Pot 592152Knob 408110

Speed Pot 592151Knob 408110

Orange On/Off Switch 607101Red On/Off Switch 607101

Pilot LightLight 703047Lens 703785

Light Holder 703900Standby Switch 602112Power Switch 602112

TREM O VERB

REAR PANEL

MISC PARTS MISC PARTSControl Function Type Mesa Part# Control Function Type Mesa Part#Channel Select Switch 602112 Bias SelectChannel Cloning Switch 600118 Select Switch 602000External Swtch 6L6 (Green) LED 395550

Channel Jack 610110 EL34 (Red) LED 395520Loop Jack 610110 Ground Switch 605373

Tremolo Jack 610110 Rectifier Select Switch 602222Reverb Jack 610110 Bold/Spongy Switch 600115

Speaker Outs (5) Jack 618100 Fuse HolderSlave Domestic Cap/Holder 790342

Pot 592378 Fuse 790403Knob 408004 Export Cap/Holder 790346Jack 618100 Fuse 795200

FX LoopAssign Rotary Sw 608200

Knob 408111Send Jack 610111

Return Jack 610111Send Level Pot 593736

Knob 408004Mix Level Pot 593736

Knob 408004

TECH BULLETIN: "Tremoverb" Update

*NOTE: This update does not apply to very early unitshaving a 120ohm, 10W sandblock resistor near pwr transformer.

The "Tremoverb" amplifier has two 47-ohm, 1/4-watt resistors(one is located next to the pair of relays and is connected to LDR #3 - Location 26-E on diagram below. The other isnext to and connected to LDR #13 - location 14-B below).

Please replace both of these 47-ohm resistors with 220-ohm, 1/2 watt resistors.

Also, the 68-ohm resistor that is connected to LDR's 11 & 12(location 14-C below) should be increased to 360-ohms .

Finally, please REPLACE LDR's #3 (type 5C4/2), #11 (5C9), #12 (5C9) and #13 (5C4).

*NOTE: LDR's manufactured by "VACTEC"(has 3 lines of print on top) are more reliablethan LDR's made by "SILONIX" (has single 4-digit number). If you encounter an amp havingseveral "SILONIX" LDR's, please callMesa/Boogie to arrange a factory repair.

Update for EARLY Trem-o-Verbsw/ 120ohm 10w resistor

in LDR supply near power transformer

LDR's 1, 2, 3, 11, 12 and 13 can see too much current in some mode settings.

FIX:1. Replace all six LDR's

Replace the folowing resistors:1. 22ohm for LDR #3 -> 68ohm2. 39ohm for LDR #1 & 2 -> 100ohm3. 68ohm for LDR #11 & 12 -> 100ohm4. 47ohm for LDR #13 -> 68ohm