Dual belt drive hi-fi turntable
One of the UK's most popular record decks from the 1980s, the CS505 and its successors (mk2, mk3, mk4) represented excellent value for money. Dual's simple design and mass production made good reproduction fidelity achievable on a modest budget.
of two speeds: 33 or 45 rpm
Replacement drive belt (BELT13) available
for £8.50 + 1.50 (UK p&p) =
Replacement pitch belt (BELT2) available for £8.50 + 1.50 (UK p&p) = £10.00
Or buy both together and save on the postage.
Terms & Conditions of sale.
Turntable Class by GB Audio -
YouTube service tutorials for the Dual CS505.
Please let us know if you find these tutorials useful and support us by subscribing for free to the GB Audio channel.
Basic Service introduction
How to adjust the Transit Screws
How to replace the pitch control belt
How to replace the main drive belt
How to set the tracking weight
how to remove the headshell and
change the stylus
Q1. Just a quick thank you for the quick dispatch and delivery. Both belts fitted perfectly on my DUAL CS 505. Unfortunately it still does not work. Having been in my loft for 20 plus years I wonder if the motor has gone. Such a shame as I was so pleased to rediscover it after all these years. Your videos on You Tube were particularly helpful. Great work and good luck for the future. Thanks again. M. 29/03/19
Answer: If the motor is not running at all, it is probably due to the microswitch beside the motor. This is a common issue on the CS505 as the switch and shunt can get sticky after a period of time. See our YouTube video tutorial https://youtu.be/tlEHLvlQ3Uw to see how to get inside the deck. SWITCH OFF THE POWER and open up the deck as per our video instructions. The photo above shows where the lever from the arm mechanism pushes the shunt and switch. A quick squirt of Servisol switch cleaner spray, WD40 or GT85 lubricating spray should sort it. While you're at it, it is a good idea to clean and lubricate the shunt pivot pin.
Q2. Good morning, sorry to trouble you but the above turntable has stopped working and I noticed that the toothed pitch belt has snapped. I was wondering if a replacement belt was fitted should the turntable continue to work?
Answer: The pitch control does not affect the start/stop function. The unit will actually run without a pitch belt, but the speed will not be accurate. So if the deck does not turn at all, then the most likely cause is a broken main drive belt. If the main drive belt is OK, then either the motor may be dead or the micro switch which turns the motor on and off may be stuck or broken. Here's what you need to do:
Firstly, check our YouTube video tutorial https://youtu.be/qMyGKXlJL4E to see the correct way to take the platter off and check if the main drive belt is in good condition and fitted correctly. Then check if motor runs when the deck is switched on (and the arm engaged to play). If the motor does not run, take the motor spindle between your finger and thumb and feel if it can move round or is it stuck solid? If it is stuck solid, then the motor may be burnt out or faulty. If it turns smoothly, then the fault is most likely to be the micro-switch which is under the sub-chassis, beside the motor (see Q1).
Q3. I saw your YouTube video on removing the headshell and stylus. I experienced some infrequent and intermittent deep buzzing sound and asked the question on the hifiengine.com forum. It was suggested I remove the headshell and clean the 4 pins. In your video you say to first unscrew the locking screw behind the pivot. However, on inspection of my headshell the locking screw is missing. Is this a problem? Could it cause my buzzing issue and where can I get on?
Answer: The locking screw only stops the locking lever from moving back and forth, it would not affect the contacts. Remove the headshell, clean the four contacts with IPA alcohol and cotton buds or contact cleaner eg Servisol. When you replace the headshell, take care not to over tighten the locking screw so that it does not push down on to the cartridge and possibly interfere with the contacts. According to customer Ray Wilkins, the replacement grub screw is a metric 2mm (dia) x 5mm (length).
Q4. Hi, I was wondering if you have a pitch belt for the above deck (the smaller belt) and, if so, how much would it cost?
Answer: As we explain in our YouTube tutorial, the original Dual, fixed length, toothed belt is no longer available so we have tried and tested this practical alternative; BELT2. It is made of synthetic rubber, so it relies on some stretch in order for it to grip properly and drive the speed changer. Yes, this is a different method to the original but it is a practical solution which works.
Q5. Is it still possible to get a replacement stylus for my CS505?
Answer: The CS505-1, CS505-2, CS505-3 and CS505-4 all came with a Dual cartridge attached with Dual's unique, low mass mounting system. Different cartridges were used at different times on different models and the most common was a low mass cartridge based on Ortofon's famous Concorde cartridge, specially designed to fit the Dual specific headshell. To identify the correct stylus for your cartridge, we suggest sending in some close-up photos of the existing stylus and cartridge so that we can identify it for you. If you need to change the whole cartridge, it gets more complicated. Other manufacturers' cartridges can be fitted on to the CS505-1 with the special Dual TKS/269-611 adaptor plate (see photos above). The CS505-2 and CS505-4 use a different Dual headshell, which features a threaded collar fitting. The CS505-3 uses yet another specific headshell which clamps on to the end of the tonearm. Original headshell adaptors are now extremely rare and likely to be very expensive but alternative, replacement parts can be found online.
|Useful vinyl and hi-fi accessories:|
|other turntable drive belts|
|Audio-Technica cartridges and styli|
|Cartridge link leads|
|Phono pre-amps to connect your turntable to an amp or PC with a line input|
to digitise your vinyl via your PC or laptop.
Filters, recording and other Hi-Fi accessories
|VIDEO TUTORIAL. Dual CS505 basic service: set the transit screws, remove the headshell, replace the stylus, set tracking weight, replace main belt, replace pitch adjust belt.|
|VIDEO TUTORIAL. How to replace the drive belt on a JVC L-A11 https://youtu.be/vy0i1OsKhRQ|
|VIDEO TUTORIAL. How to align the cartridge, adjust the tracking weight and set the anti-skating on the JVC L-A11 https://youtu.be/q6MSN4Gg_cs|
|VIDEO TUTORIAL. See how quick and easy it is to change a turntable drive belt: https://youtu.be/v23VXCg07HY|
|VIDEO TUTORIAL. See how quick and easy it is to change a turntable stylus: https://youtu.be/zYwmPbTVaQc|
|VIDEO TUTORIAL. See how quick and easy it is to measure and change a turntable drive belt: https://youtu.be/eimUOnn4Q0w|
See how quick and easy it is to measure and change a CD or DVD
tray drive belt:
See how to replace a counter drive belt on a Revox B77
See how to replace a load/eject drive belt on a Hitachi M830 VHS
|Dr Know's helpful advice for diagnosing and servicing your turntable and cartridge.|
|Our cable-making service can build bespoke, specialist audio leads to your specification.|
Buy with confidence. Unsolicited Customer Quotes:
"Hi guys, Just a quick thank you for the timing belt fort the
CS505. It arrived the next day and is now installed and working
(helped by your video!). Thanks again. Cheers",
"Thanks for the advice on the sticky microswitch. It was not engaging properly. Wd 40 sorted it , all good. Thanks again". Lewis Lyell (08/01/2019)
"Dear GBAudio, Just to
say thank you for your prompt help and service. With the help of the DIY
video and your advice as to the right belt for my Dual turntable I was
able to fix it myself (I have never dared fiddle with my Hi-Fi before as
I was afraid of damaging it). Belt fits fine and it plays LPs again. The
best £10 I have spent on audio.
Well done!" A Freer (31/12/2015)
"Thanks very much for this, it's very helpful... I am most grateful for your advice." D Scott (21/02/2014)
"Hi, Many thanks for your excellent efficient service. The replacement belt is working well. Regards" C. Cox (15/06/2012)
"Many thanks for the excellent customer service. I will gladly buy from you again. Best Regards", J Houston (07/04/2012)
"To thank you for the excellent turnaround on the item I purchased on Tuesday January 3rd. - an item which I ordered on your advice. It was delivered on Monday 9th. which, considering that Friday 6th was a national holiday here in Spain was sooner than I expected. The item is working perfectly. Many thanks". E Robinson (11/01/2012)
"I sent off my order form for a replacement turntable drive belt on Tuesday; on Thursday it arrived. Followed very clear instructions to get the right size drive belt; new one works perfectly. An exemplary service. Thanks" J Rizq (14/09/2011)
"That's brilliant! Thank you so much for the excent and speedy service. Best wishes," L. England. (03/09/2011)
"Thanks for the easy to use website" P. Collins (05/07/2011)
"Nice one, left message on Sunday, GB Audio called me back just after 9am on Monday, had drivebelt and turntable up and running on Tuesday. Couldn't have been easier or faster. Loved the Replacement Drive Belt selection table and guide, superb: http://www.gbaudio.co.uk/data/belts.htm H Wood" (12/04/2011)
"Thank you for the speedy service. I ordered the belt yesterday over the telephone and received it this morning. It works and fits well. Regards D Ewers" (22/03/2011)
"Many thanks for your help , the band arrived and fitted perfectly. My elderly father is now happily listening to Bach again! Cheers Ellen" (12/03/2011)
"Thank you GB audio, great service, only a replacement drive belt but arrived first class post next morning, have deck working again after a very long time. Already singing your praises. D Terry" (01/02/2011)
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