DYNACO MARK VI Instructions For Assembly Operation Download Page 14

24 (    ) Select the violet-white lead from the power trans-

 

former,  feed  it  under  T-5,  and  through  the  grom-

meted hole G3. Twist this wire and the black wire fed 

through this hole uniformly together on the top side 

of the chassis for future identification.

 

25 (    ) Select the remaining plastic tie. Group together the

 

green and violet twisted pair, the violet-white, and 

the red-black leads from the power transformer, and 

bind them together with the tie for a neat appearance, 

as shown in the Pictorial Diagram. Cut off the excess 

tie.

 

26(  ) Prepare a 6 1/4" (16 cm) black wire, and connect one 

end to T-4 lug #2 at the base (S). Feed it through 

hole Gl. The other end will be connected later.

 

27(  ) Prepare a 4 1/2" (11.5 cm) yellow wire, and connect 

one end to T-4 lug #6 at the base (S). Feed it also 

through  hole  Gl.  The  other  end  will  be  connected 

later.

 

28(  )  Select  the  2940  ohm, 

1/2

 

watt  resistor  (red-white-

yellow-brown) , bend its leads 90° to its body, and cut 

its leads to 

1/2

(1.3 cm) each. Connect one lead to 

T-4 lug #1 at the tip (S). Connect the other lead to 

T-4 lug #2 at the tip (S).

 

29(  ) Select one of the 5600 ohm, 

1/2

 

watt resistors (green-

blue-red) , bend its leads almost 90° to its body, and 

cut its leads to 

1/2"

(1.3 cm) each. Connect one lead 

to T-4 lug #6 at the tip (S). Connect the other lead 

to T-4 lug #5 at the tip.

 

NOTE: If the alternate (Japanese) unit has been supplied, se-

lect instead one of the 7500 ohm, 1/2

 

watt resistors (violet-green-

red) , and install the part as indicated above. 

30(  ) Select the diode, part #543541, bend its leads 90° to 

its body, and cut its leads to 

1/2

(1.3 cm) each. Do 

not  confuse  it  with  the  #544012  diode,  which  may 

look similar. Connect the lead on the marked end to 

T-4 lug #5 at the tip (S-2). Connect the other lead to 

T-4 lug #4 at the tip.

 

31(    ) Select one of the 50 mfd, 75 volt electrolytic capaci-

 

tors, bend its leads more than 90° to its body, and 

cut its leads to 3/4" (2 cm) each. Before connecting 

this  part  and  a  similar  capacitor  in  another  step, 

notice that they are marked for polarity with a ( + ) 

sign,  a  (  -  )  sign,  or  sometimes  both  symbols.  Con-

nect the ( + ) lead to T-5 lug #12 at the base. Connect 

the other lead to T-5 lug #8 at the base (S).

 

NOTE:  All  components  connected  to  this  terminal  strip 

should be on the left side.

 

      32(    ) Prepare a 5 1/2" (14 cm) black wire, and connect  

one end to T-5 lug #12 at the base (S-2). Connect 

the other end to Cl lug "D".

 

33(    ) Select the remaining 50 mfd, 75 volt electrolytic ca-

 

pacitor, and bend its leads more than 90° to its body. 

Cut the lead on the ( + ) end to 1" (2.5 cm), and cut 

the lead on the other end to 1 1/4" (3.3 cm). Strip 

1"

 

(2.5 cm) of insulation from the roll of yellow wire, 

and slip the insulation on the ( —) lead. Connect the

 

( + ) lead to T-5 lug #12 at the tip. Connect the other 

lead to T-5 lug #9 at the base.

 

34 (    ) Prepare a 6 1/2" (16.5 cm) yellow wire, and connect

 

one  end  to  T-5  lug  #9  at  the  base  (S-2).  Feed  it 

through  hole  G3.  The  other  end  will  be  connected 

later.

 

14

 

35(  ) Prepare a 6 1/2" (16.5 cm) black wire, and connect 

one end to T-5 lug #10 at the base (S). Feed it also 

through  hole  G3.  The  other  end  will  be  connected 

later.

 

36(  ) Prepare a 7" (18 cm) black wire, and connect one 

end to T-5 lug #11 at the base (S). Feed it through 

hole  G3  and 

bend  a  hook  at  the  other  end  for  future 

identification. 

The other end will be connected later.

 

37(   ) Select the diode, part #544012, bend its leads 90° to

 

its body, and cut its leads to 

1/2

" (1.3 cm) each. Con-

nect the lead on the marked end to T-5 lug #7 at the 

tip (S). Connect the other end to T-5 lug #8 at 

the tip.

 

38(    ) Select one of the 18,000 ohm, 1 watt resistors (brown-

 

gray-orange) , bend its leads 90° to its body, and cut 

its leads to 

1/2

" (1-3 cm) each. Connect one lead to 

T-5 lug #8 at the tip (S-2). Connect the other lead 

to T-5 lug #10 at the tip (S).

 

39(    ) Select the 10,000 ohm, 1 watt resistor 

(brown-black-

 

orange), bend its leads more than 90°, and cut its 

leads to 5/8" (1.5 cm) each. Connect one lead to T-5 

lug #11 at the tip (S). Connect the other lead to T-5 

lug #12 at the tip.

 

40(  ) Prepare a 6 1/2" (16.5 cm) black wire, and connect 

one  end  to  T-5  lug  #12  at  the  tip  (S-3).  Feed  it 

through hole G2. The other end will be connected 

later.

 

41 (   ) Select the 240,000 ohm, 1 watt resistor (red-yellow-

 

yellow) , bend its leads 90° to its body, and cut its 

leads to 

1/2

(1.3 cm) each. Connect one lead to Cl 

lug "B" (S-2). Connect the other lead to Cl lug #2.

 

42 (  ) Select the remaining 18,000 ohm,  1 watt resistor

 

(brown-gray-orange),  and  cut  its  leads  to  3/4"  (2 

cm) each. Strip 

1/2

(1.3 cm) of insulation from the 

roll  of  yellow  wire,  and  slip the insulation on one 

lead. Feed the insulated-lead end through TD-1 pin 

#3  to  pin  #4,  and  solder  both  pins.  Connect  the 

other lead to Cl lug #2.

 

The connecting pins for the XLR input have an open end 

rather than a hole. Simply insert the wire in the open end. 

When soldering is called for, hold it in place as you solder.

 

43 (   ) Strip the insulation from a 7/8" (2.3 cm) black wire.

 

Bend  the  bare  wire  in  a  1/4"  (1  cm)  wide  "U". 

Insert  one  end  of  the  "U"  into  XLR  input  pin  #1, 

and the other end into XLR pin #2. Solder pin #2 

only. 

44(  ) Prepare a 3" (7.5 cm) black wire, and connect one 

end  to  XLR  input  pin  #1  (S-2).  Connect  the  other 

end to RCA input lug #1.

 

45(  ) Prepare a 1 3/4" (4.5 cm) black wire, and connect 

one  end  to  RCA  input  lug  #1  (S-2).  Connect  the 

other end to RCA input lug #4.

 

46(  ) Select the .05 mfd (or .047 mfd) capacitor, bend its 

leads  90°  to  its  body,  and  cut  its  leads  to  3/4"  (2 

cm)  each.  Connect  one  lead  to  RCA  input  lug  #2 

(S). Connect the other lead to RCA input lug #3.

 

47(    )  Prepare  another  1  3/4"  (4.5  cm)  black  wire,  and 

connect  one  end  to  XLR  pin  #3  (S).  Connect  the 

other end to RCA input lug #3.

 

Summary of Contents for MARK VI

Page 1: ......

Page 2: ......

Page 3: ...of 120 watts with less than 1 total harmonic distortion Frequency Response 0 1 dB 10 Hz to 40 kHz 1 watt Intermodulation Distortion 1 or less at rated power using 60 Hz and 7000 Hz Mixed 4 1 Distorti...

Page 4: ...ent on any flat sur face The amplifier should be installed where the front panel is accessible If the Mark VI is to be mounted near a phono graph check to make sure that the phono cartridge does not p...

Page 5: ...ble if high signal levels are wanted Lacking more definitive advice a rough test is to place your hand in front of the woofer when playing a loud passage at your antici pated listening level If you ca...

Page 6: ...o cool undisturbed ALL SOLDERING MUST BE DONE WITH A GOOD GRADE OF ROSIN CORE SOLDER Under no circumstances should acid core solder be used Unmarked solder cheap solder or any of doubtful origin shoul...

Page 7: ...ottom edge of the inside surface turns toward you The three parts attached to this bracket will be mounted from the inside 2 Select the 10 000 ohm control part 145103 a 3 8 nut and a 3 8 thin lockwash...

Page 8: ...the remaining eight sets of 4 hardware and install the four capacitor brackets on the top out side of the chassis as shown in the sketch Do not tighten any hardware 20 Select the two 50 mfd 300 v and...

Page 9: ...Connect the corresponding end of the other wire to V3 pin 7 S 2 Connect a wire at the free end to V4 pin 2 Connect the remaining end to V4 pin 7 4 Select the remaining yellow pair and connect the 1 1...

Page 10: ...90 to its body and cut it to 1 cm Connect the bent lead end to V5 pin 4 S Connect the other lead to T 2 lug 3 at the tip 10 27 Select another 22 ohm 2 watt resistor red red black Bend one lead 90 to i...

Page 11: ...under terminal strip T 3 and connect it to power fuse lug 1 S 12 Select the red yellow lead from the power trans former and also feed it under terminal strip T 3 Bend a hook at the free end and connec...

Page 12: ......

Page 13: ...0 ohms 1 2 w 1 130294 D101 Diode 1 a 200 prv 544012 D102 Diode 3 a 1 000 prv 544323 D103 Diode 3 a 1 000 prv 544323 D104 Diode 3 a 1 000 prv 544323 D105 Diode 3 a 1 000 prv 544323 D106 Diode 1N541 Ger...

Page 14: ...T 5 lug 12 at the tip Connect the other lead to T 5 lug 9 at the base 34 Prepare a 6 1 2 16 5 cm yellow wire and connect one end to T 5 lug 9 at the base S 2 Feed it through hole G3 The other end will...

Page 15: ...spacers Insert two of the screws first through the bracket assembly from inside the bend and mount the bracket over the two front holes from outside the chassis between the transformers so that the co...

Page 16: ...V4 pin 6 and V5 pin 6 should be arched in the air away from other components and wires Note however that the shielded cable connected to the input sockets may come in contact with the black wire conn...

Page 17: ...carefully remove the two 1 2 10 black screws which have loosely attached the front panel assem bly to the chassis and allow the speaker fuse and the power switch to support the panel Now select the b...

Page 18: ...the amplifier is used continuously Biaset should be checked at least weekly If the amplifier is in a mobile instal lation we recommend checking the Biaset every time the amplifier is set up in a new...

Page 19: ...n connection from the bias supply to this tube If there is a single glowing tube and no TVM or VTVM is available it is easy to find the fault by interchanging tubes If any tube in the same socket exhi...

Page 20: ...etrimen tal effect on performance Therefore these voltage measure ments are only approximate and may vary widely These bias voltages must be measured with a TVM or VTVM These measurements must be iden...

Page 21: ...nsformer has tapped dual primary windings They are connected in parallel for 100 and 120 volts and in series for 220 and 240 volts The notes to step 11 on page 11 and steps 4 and 7 on page 17 the sket...

Page 22: ...ut for its return The warranty on the transformers is void if the leads have been cut too short for re use Dynaco maintains a Technical Services Department to help you locate the source of and possibl...

Page 23: ...1 Warranty Card kit 1 Instruction Manual DIODE FUSE ASSEMBLY 997163 1 Diode 1N541 543541 1 Diode 1 A 200 PRV 544012 4 Diode 3 A 1 000 PRV 544323 alternate 4 Diode 3 A with red dot 544322 2 Fuse 5 A AG...

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