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Mableaudio 5E3, Assembly Manual

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Mableaudio Company limited 

Web: www.mableaudio.com 

Tel:0086-755-83996326 fax:0086-755-83996326 

Contact: Ms Mable   [email protected] 

[

5E3 assembly manual

]

 

 

 

WARNING!    This amp operates at voltages that may exceed 400V!    Use extreme caution 
when building and testing.    If you are not comfortable working with high voltages, refer 
assembly and testing to a qualified technician.     
 
Neither the manufacturer nor the seller of this kit assume any responsibility for damages or 
injuries incurred during assembly, testing, repair, or usage of this device. 

 

 

Note:  

There are some minor variations between this 5E3 kit and the original Fender 5E3.    Most of 

these changes improve the noise and hum characteristics, and do not alter the tone or the sound in 
any way.    We have provided a schematic diagram at the end of this document.    You can find the 
original 5E3 schematic on many websites, if you wish to compare the two.         

 

 

Recommended tools: 

Screwdrivers -- Standard and Philips 
Adjustable wrench (standard pliers will suffice) 
Needle Nose Pliers 
Diagonal Cutters 
Wire Strippers 
Soldering Iron -- 15 to 40 watt or temperature controlled solder station 
High Power Soldering Iron or Gun – 100 watts or more 
Solder 
Multimeter -- AC/DC rated for at least 450V DC, resistance 
Power Drill or Dremel rotary tool with grinder attachment, or a small to medium file 

 

 

Summary of Contents for 5E3

Page 1: ... minor variations between this 5E3 kit and the original Fender 5E3 Most of these changes improve the noise and hum characteristics and do not alter the tone or the sound in any way We have provided a schematic diagram at the end of this document You can find the original 5E3 schematic on many websites if you wish to compare the two Recommended tools Screwdrivers Standard and Philips Adjustable wre...

Page 2: ...Eyelet Board and parts Verify that you have all the necessary parts shown ...

Page 3: ... wires through the eyelets and solder Cut excess wire from the other side of the board To make things easier you can hold off on soldering until the wires are attached in the next step Turret board see third image top row Position each component by running wires through the turrets and bend wires as necessary Remove the component and cut the wires so that only 1 8 1 4in or 3 6mm is inside the turr...

Page 4: ...cut each wire so that it hangs off the board by the specified number of inches 1in 25 4mm It s OK if you cut them longer than specified Excess will be cut off at final assembly If your board has turrets attach the wires on the top of the board component side by stripping 3 8in or 9mm from the end of the wire and then wrap the wire around the turret see image to the right To solder hold your solder...

Page 5: ...Chassis Level assembly Tip Wear white cloth gloves when handling the chassis to avoid getting fingerprints on the chrome surface Check to see that all necessary parts are present ...

Page 6: ...lead to Pin 9 and the other across Pins 4 and 5 of the first preamp tube 12AY7 Your first segment will go from here to Pin 9 and Pins 4 and 5 of the second preamp tube 12AX7 Tip Tight consistent twists will make your amp operate quieter Twist and cut the second segment of green filament wire to go from Pin 9 and Pins 4 and 5 of the second preamp socket 12AX7 to the nearest output tube socket hole ...

Page 7: ... Connect a green wire from Pin 3 on Jack A to Pin 3 on Jack B Install a potentiometer into the first position Pot 1 as shown Take a 0047uf 630V capacitor and bend the leads as shown below Solder one lead to Pin 1 and leave the other lead along the back of the potentiometer to be soldered later Solder a short length of yellow wire to Pin 2 ...

Page 8: ...mel tool with a grinding attachment You can also use a file Install these potentiometers in the two open positions Pot 2 and Pot 3 and solder a 470pf capacitor from Pin 3 on Pot 1 to Pin 2 on Pot 2 Use a small piece of tubing heat shrink or insulation stripped from a wire to insulate the lead that goes to Pot 2 from touching the grounded lead Solder the yellow wire from Pin 2 on Pot 1 to Pin 3 on ...

Page 9: ...ier to complete the next few steps but it will be more difficult to bolt the transformer down if you do it this way Make sure that all the wiring on the back side of the circuit board is correct before proceeding to the next step Any errors made will be extremely difficult to repair after the board is wired in Before installing the circuit board make sure that all of the wires are bent upwards so ...

Page 10: ......

Page 11: ...o Pin 8 Point 2 to Pin 2 Point 3 to Pin 7 Point 4 to Pin 1 and Point 5 to Pin 6 Cut off excess wire as needed Second preamp tube 12AX7 Connect Point 6 to Pin 3 Point 7 to Pin 2 Point 8 to Pin 1 Point 9 to Pin 6 Point 10 to Pin 8 and Point 11 to Pin 7 ...

Page 12: ... helps to remove some of the chrome surface using a drill or Dremel tool with a grinder attachment You can also scrape it off with a screwdriver a knife or the edge of a file Heat the spot with a high power 100 watt soldering gun until solder flows and sticks Then solder the wire down to the spot ...

Page 13: ...A Connect Point 1 to Pin 1 Solder a 1 Meg Ohm resistor between Pin 1 and Pin 2 Connect Pins 2 and 3 together Jack B Connect Point 2 to Pin 1 Connect Pin 3 to Pin 2 on Jack A Leave Pin 2 empty Connect Point 3 to Pin 2 on Pot 3 ...

Page 14: ...esistor between Pin 1 and Pin 2 Connect Pins 2 and 3 together Jack D Connect Point 5 to Pin 1 Connect Pin 3 to Pin 2 on Jack C Leave Pin 2 empty Connect Point 7 to Pin 3 on Pot 3 Connect Pin 3 on Pot 2 to Pin 3 on Pot 3 Connect Point 6 to Pin 2 on Pot 2 ...

Page 15: ...ee potentiometers Tip To get solder to stick to a solid metal surface such as the back of a potentiometer it helps to rough up the surface first You can do this with a power drill or Dremel tool with a grinding attachment or a file Overall view of the front panel wiring ...

Page 16: ...are closest to the output jacks Run the wires through the rubber grommets Install the three octal tube sockets and tube retainers as shown Make sure the sockets are turned so that the key notch on the center hole is towards the open bottom of the chassis as shown Bend the solder lugs on all three sockets outward away from the sockets ...

Page 17: ...Twist the black and green secondary wires from the output transformer Connect the black wire to Pin 2 and the green wire to Pin 3 on Jack A ...

Page 18: ...Output tube wiring Connect the twisted green filament wires from the 12AX7 tube to pins 2 and 7 on the first 6V6 tube socket ...

Page 19: ...f green wires long enough to go from the second 6V6 socket to the pilot light hole on the front panel Connect one end to pins 2 and 7 and leave the other end disconnected for now Connect Point 2 on the circuit board to the Pin 8 on the second 6V6 tube socket Run a yellow wire from Pin 8 on the first 6V6 tube to Pin 8 on the second 6V6 tube socket ...

Page 20: ...cuit board to Pin 1 on the first 6V6 tube socket Connect a red wire from Pin 1 on the first 6V6 tube socket to the Pin 1 on the second 6V6 tube socket Solder a 470 Ohm 1W resistor between Pin 1 and Pin 4 on both 6V6 tube sockets ...

Page 21: ...e second 6V6 tube socket Connect the Brown wire from the OT to Pin 3 on the first 6V6 tube socket Twist the red wire from the Output Transformer with the red wire from Point 3 on the circuit board together and connect them to Pin 8 on the rectifier 5AR4 tube socket ...

Page 22: ... first 6V6 tube socket Solder a 1 5K ohm resistor between Pins 5 and 6 on the first 6V6 tube socket Connect Point 5 on the circuit board to Pin 6 on the second 6V6 tube socket Solder a 1 5K ohm resistor between Pins 5 and 6 on the second 6V6 tube socket ...

Page 23: ...An overall view of the chassis Mount the power transformer as shown below ...

Page 24: ...Connect the Green Yellow wire from Power Transformer to the Green wire from the circuit board See below ...

Page 25: ...Twist the two yellow wires 5V 3A tap from the Power Transformer and connect them to Pin 2 and Pin 8 on the rectifier tube socket See red arrow below ...

Page 26: ...a 5AR4 without the diodes installed Twist the two red wires from the PT together and run one of them to Pin 5 on the rectifier tube socket 5AR4 Solder a BYV26E diode from Pin 5 to Pin 6 The negative lead with the black band goes to pin 6 and the positive lead goes to Pin 5 Connect the other red wire from the PT to Pin 3 on the rectifier tube socket Solder a BYV26E diode from Pin 3 to Pin 4 The neg...

Page 27: ...pade connectors To install these connectors do the following 1 Strip approximately 1 8in or 3mm from the end of the wire 2 Slip the clear insulating cover over the wire 3 Using needle nose pliers bend the two smaller tabs onto the wire and bend the larger tabs onto the insulation Make sure the wire is held in place firmly 4 Solder the wire where it meets the metal on the connector ...

Page 28: ...Connect the black primary wire from the Power transformer to F2 on the fuse holder Connect the white primary wire 230V to P2 on the power switch See the two pictures below ...

Page 29: ...Connect the Red Yellow wire from Power transformer to S2 on the Standby switch See below ...

Page 30: ...Make a short black wire and connect F1 on the fuse holder to P1 on the power switch ...

Page 31: ...Connect the two green wires from the power transformer to the two terminals on the pilot light Connect the two green filament wires from the second 6V6 to the pilot light as well ...

Page 32: ...Power cord wiring Cut the IEC connector off the end of the end of the power cord Strip off outer insulation and install connectors as shown ...

Page 33: ...ace with the plastic strain relief clip Make sure there is enough wire inside to reach the power switch You may need to use a pair of pliers to squeeze the clip together to get it through the hole Connect the brown wire to P3 and the blue wire to P4 on the power switch ...

Page 34: ...Make a short black wire and connect S1 on the Standby switch to the chassis ground Connect the Yellow Green wire from the Power Cord to the same chassis ground point ...

Page 35: ......

Page 36: ...ed wiring the chassis Compare your work to the pictures below and double check all of your wiring Pat yourself on the back have a cup of tea or the beverage of your choice and take a break We ll have your new amp up and jamming in no time ...

Page 37: ...nd then at Pin 5 Both voltages should be around 355VAC If you are using a 5Y3 rectifier without the diodes do this test at pins 4 and 6 instead There is no need to discharge the capacitors at this point without the rectifier tube in place Turn the power off and install the rectifier tube Make sure the key on the middle of the base of the tube matches up with the notch in the socket You may need a ...

Page 38: ... make sure the tone knob does what it should do Troubleshooting If you get no sound at all there are still a few things to try Concentrate on the output tubes and the output transformer wiring Make sure that the green and black wires are connected to the tip and ground tabs on the output jacks respectively Page 17 Go back to the output tube wiring on page 18 and check that you did everything right...

Page 39: ...5E3 Schematic ...

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