DYNACO MARK VI Instructions For Assembly Operation Download Page 22

SERVICE POLICY AND LIMITED WARRANTY 

The  Mark  VI  has  been  carefully  engineered  to  provide 

many  years  of  musical  enjoyment  without  difficulty.  Each 

factory-assembled  Mark  VI  has  been  subjected  to  a  full 

complement of performance tests prior to shipment. Never-

theless,  through  damage  in  transit,  faulty  kit  assembly,  or 

human error, service may sometimes be required.

 

To provide rapid and reliable service, Dynaco has autho-

rized  competent,  well-equipped  service  facilities  in  several 

localities in the United States and Canada, in addition to 

its service facility at the factory. These stations are autho-

rized to make repairs in and out of warranty under the terms 

listed below. Service is always available at the factory, but 

you will often find a more convenient facility locally. A cur-

rent list of these facilities is enclosed. Write to Dynaco for 

the name of the service station nearest you.

 

It  is  the  owner's  responsibility  to 

take  or  send  the  unit 

freight prepaid to the service facility. A dated bill of sale must 

be  submitted. 

In  the  event  that  you  incorrectly  diagnose 

which  unit  is  faulty,  please  understand  that  you  will  be 

responsible for a check-out charge on any properly perform-

ing kit or factory-assembled unit submitted for testing.

 

Shipment should be made via motor freight, REA Express 

(CN or CP Express in Canada), or Bus Package Express.

 

DO NOT USE PARCEL POST FOR IT IS NOT A SAFE METHOD OF

 

SHIPPING ELECTRONIC EQUIPMENT

. Should damage occur due 

to unauthorized parcel post shipment of the complete ampli-

fier, repairs will be made at the owner's expense, as neither 

the  factory  nor  the  service  stations  has  the  facilities  to 

process  parcel  post  claims.  Be  sure  the  shipment  is  fully 

insured (note Bus Express limitations).

 

When shipping the amplifier, use the original carton with 

all the styrofoam inserts. Include with the returned unit the 

following information:

 

1.  Your name and complete shipping address (Post Office 

box numbers are not suitable); 

2.  The serial number  (from the cover of this manual), 

together with a copy of your dated bill of sale;

 

3.  The symptoms, complete, but preferably brief. If the 

problem is intermittent, this 

must 

be noted. 

Once service work has been performed, an additional 90 

day warranty on the service work is provided.

 

Warranties apply to the original purchaser only; they are 

not transferable. They do not apply to units which have been 

physically  or  electrically  abused,  or  to  units  which  have 

been  modified  without  prior  written  factory  authorization. 

The use of non-Dynaco replacement parts may in some in-

stances  void  the  warranty.  If  you  suspect  a  defect  in  a 

transformer,  the  leads  must  be  unsoldered,  not  cut  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 possibly correct a problem 

yourself.  When  writing,  mention  the  serial  number  of  the 

Mark VI and any tests you have performed.

 

WARRANTY FOR KIT-BUILT UNITS

 

The components in a Mark VI kit are warranted for a 

full year from the purchase date. If a defective component is 

found  in  a  completed  circuit  board  module,  or  kit,  simply 

return that individual part to the 

factory 

prepaid, and it will 

be replaced at no charge. Local service stations are not obli-

gated to supply separate parts.

 

If you cannot locate the source of the difficulty, ship the 

entire Mark VI to the nearest authorized service station or 

to the factory for service. A dated bill of sale must be sub-

mitted.  In-warranty  parts  will  be  replaced  at  no  charge, 

although a service fee will be charged for the labor to diag-

nose, correct, and test the unit to ensure that it meets factory 

specifications.  Shipping  charges  to  and  from  the  service 

facility are the owner's responsibility. Units will be returned 

on a COD basis via motor freight wherever possible.

 

The  return  of  the  PC-44  circuit  board  for  service  to  the 

factory or to an authorized service station is not adequate 

to  assure  proper  operation,  and  a  single  circuit  board  sub-

mitted for repair will be returned unserviced.

 

This warranty is void if the kit has not been completely 

assembled, or if other than rosin core solder has been used. 

Units assembled with acid core solder or paste flux will be 

returned unserviced.

 

WARRANTY FOR FACTORY ASSEMBLED UNITS

 

The Mark VI is warranted for a full year from the pur-

chase date, including parts and labor, and shipment costs 

from 

the  service  facility  to  the  owner  (within  the  U.S.  or 

Canada).  The  owner  is  responsible  for  shipment 

to 

the 

service facility, and must submit a copy of the dated bill 

of sale.

 

SERVICE BEYOND THE WARRANTY PERIOD

 

Dynaco  establishes  maximum  labor  fees  which  may  be 

charged by its service facilities (plus the cost of parts, and 

shipping charges) without prior approval by the owner. 

A  current  list  of authorized service stations, and the cur-

rent established fee for any unit will be supplied by Dynaco 

on request. Dynaco cannot assume responsibility for ser-

vice at other than 

Dynaco authorized service stations.

 

Dynaco reserves the right to limit the service facility or 

the established fees to two years from the date of purchase. 

Dynaco assumes no liability or responsibility for injury or 

damages  sustained  in  the  assembly  or  operation  of  this 

equipment, or for damages to other equipment connected to 

it. Dynaco reserves the right to make design changes with-

out the obligation to revise prior versions. Prices and speci-

fications subject to change without notice.

 

22

 

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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