QUAD 606 MK I DIY Manuallines Download Page 3

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Step 1 – The tools & the Components

The tools you need:

A good quality soldering iron with a fine point (max 30) Watt or a 
soldering-station.

A desoldering-pump

A micro cutting nipper, a wire-stripper and a miniature pliers

A Philips n° 2 and n° 1 screwdriver and a small flat screwdriver

Tin/lead solder wire (no unleaded solder!)

A digital multimeter

If you don’t have these tools you can order them iYou should also have the 606 schematic and the corresponding Pcb layout at 
hand. You will find them in the appendix of this document. The versions are 
related to the serial number of the unit, but double check this on the amplifier 
modules themselves! On the Pcb the issue number is marked on the copper 
side. If you wish, you can order the complete Service manual, just send an e-
mail to
and we will reply with the document 

attached. Othe document from our website.

There is one version of the 606 upgrade-kit, and two options. We strongly 
advise to use the basic kit and option 2 as a minimum set. 

1. The 

Basic version

includes the input connectors, internal cabling, 

capacitors for the driver-boards, PCB-connectors and other small 
components.

2. The 

PSU Capacitor option

contains 4x BHC Aerovox 10.000µF 63 V 

capacitors (or 4x BHC Aerovox 15.000µF 63V for the 606 MKII).

3. The 

Power transistor option

contains 12x 2N3773 transistors, four

driver transistors MJE15031 and in total 16 silicon pads. 

The components in the 606

basic upgrade-kit

Cables, connectors & mechanical components:

 4x 1M  flexible 0,75mm² flexible cable for internal wiring (Orange for 

mass,  Yellow for the LS-outputs, Black for – DC-current, Red for + DC 
current).

 Shielded audio-cable, 50cm

12x Silver plated Faston connectors, female  

Thermal insulation-tube, 30cm 

Components to be mounted on the driver-boards: 

2x R 560R 1% for R1 (green-blue-black-black-brown) 

Summary of Contents for 606 MK I DIY

Page 1: ...ity capacitors are replaced by Silvered mica capacitors All the cabling will be replaced by Hi Q cabling in the original colors We will also adapt the input sensitivity as an option by increasing the...

Page 2: ...en there are any problems send an e mail to info dadaelectronics eu with a good description of the problem Some pictures may help us understand the problem better We will do our best to answer within...

Page 3: ...eu and we will reply with the document attached Or download the document from our website There is one version of the 606 upgrade kit and two options We strongly advise to use the basic kit and option...

Page 4: ...C7 Nichicon 4x C 470 F 63V for C9 C11 Nichicon Only needed if you want to change the input sensitivity Separate components and parts you can order these from the Dada Electronics webshop 12x 2N3773 Po...

Page 5: ...wires per board Remove the driver boards 2x 3 screws Remove the 4 PSU capacitors and mounting rings Step 3 Fitting in the Power Supply capacitors and the connectors It is important to do these steps...

Page 6: ...power line This means the power and driver transistors are OK It is a good practice to upgrade the boards one by one So we can compare between the boards if we want to see the polarity of capacitors...

Page 7: ...view as a reference Make notes or pictures for reference information Place new silicon pads and reinstall all the components Check with an ohm meter there is no connection between the heat sink and th...

Page 8: ...es is 120 130 mA Re check both sides of the boards to make sure that the polarity of the electrolytic capacitors is correct and that there are no soldering short circuits between the Pcb tracks Step 7...

Page 9: ...hem or other Heat Shrinkable Tubing for insulating the and output connections as there are large voltages between them Connect the and leads from the power supply to the boards Connect the LS outputs...

Page 10: ...from the rear panel Remove the bottom and the U shaped chassis part The unit will looks like this Remove the amplifier boards with a long Philips posidriv screwdriver be careful not to make contact wi...

Page 11: ...transformer remove those Be careful sometimes they are a little bit covered by the transfo lift the Psu Pcb to loosen those screws Now the Psu caps can be replaced The revision of the amplifier boards...

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