20 Most Recent GPX HMTU3234 Shelf System Questions & Answers


Hi,

I think that the rubber wheel pushing on the tape and controlling the speed is stuck somewhere and this preventing him to stay on the tape and control its speed


Daniel

https://www.rylwy.com/carbon-antenna

GPX HMTU3234... | Answered on Dec 24, 2017


Actually, you start the turntable by moving the tone arm AWAY from the center.

GPX HMTU3234... | Answered on Dec 12, 2008


It sounds like a mis-aligned laser or faulty laser unit. Either way unless you have experience of fixings cd players yourself its a job for the technicians. Good luck.

GPX HMTU3234... | Answered on Sep 26, 2008


Motor speed needs to be regulated by PWM. Reducing the current (with a resistor) actually lowers the torque - which, with a given load, does result in reduced speed - however, different length tapes (60min vs 90min), as well as different quality, and even current position in the tape, will change the load and hence the speed. You need to regulate the speed via PWM. It's sometimes done on a small board built into the motor, in which case you'd have a round hole into which you could insert an INSULATED screwdriver (tiny flathead wrapped most of the way in electrical tape works). It may be done on the main board, in which case you could find a pot conveniently labeled "motor speed", or perhaps "pulse width" or "pwm" or something to that effect. Find it, mark its current position just in case, and turn it to see if it gets the effect you're after. And there are some tape decks in the world with no speed adjust - they are designed with a specific speed motor and the sizes of the wheels and gears are calculated for that speed. Also there may be a mechanical fault/malfunction causing the speed problem. An initial check and thorough cleaning of the capstan and pinch roller should be done. If there is a buildup of tape oxide or a piece of a broken tape wrapped around the capstan, the tape travel will be too fast (do to the effective increase in capstan shaft diameter). If the pinch roller isn't fully engaging, the tape can be getting pulled onto the takeup spool at a speed faster than the capstan control. A different source of trouble might be a slip clutch (possibly an idler/clutch assembly)which is binding, or otherwise not functioning the way it should. Another type of motor doesn't have it's speed controlled by an internal or external voltage.. instead, the motor has an internal centrifugal speed controller. This type of motor can be found on older tape decks, and might not have been utilized more recently. Good luck

GPX HMTU3234... | Answered on Jul 10, 2008


Most of those types of screws only require a 1/2 turn to unlock.

GPX Audio... | Answered 2 days ago


What happens is that a mechanical system under the turntable pushes on a micro switch to operate the motor. Clearly either the mechanical system has moved out of position or the switch has. You take the bottom off the turntable and see what happens when you move the arm.

GPX Audio... | Answered on Oct 19, 2018


Google (gpx)(sp60)(manual) without parens for instructions.

GPX Audio... | Answered on Sep 10, 2018


Google (GPX)(D606)(manual) without parens.

GPX Audio... | Answered on Sep 01, 2018


Google (gpx)(KC 220s)(manual) without parens.

GPX Audio... | Answered on Aug 11, 2018


First, I'm not a GPX reapresentative.
* Check your warranty. Call for support.
* User instructions; https://images-na.ssl-images-amazon.com/images/I/B1JjZHqCJCS.pdf
* Customer help line; 888-999-4215

*** Following is for information only.***
* Specs; https://www.bestbuy.com/site/gpx-micro-hi-fi-system-black/2878063.p?skuId=2878063
* Amazon also supports this brand; https://www.amazon.com/GPX/b/ref=bl_dp_s_web_2529506011?ie=UTF8&node=2529506011&field-lbr_brands_browse-bin=GPX
* Cnet review; https://www.cnet.com/products/gpx-hm3817dt/specs/
* Another model review; https://www.youtube.com/watch?v=cJIx-x45LYQ

Aloha, ukeboy57

PS; If your using a 3d party remote (that must be GPX compatible)then the codes will be on the (remote)papers.

GPX Audio... | Answered on Aug 03, 2018


Whats rong w it

GPX Audio... | Answered on Jul 29, 2018


First check if the tape is moving during playback. If it is not there could be something wrong with the mechanism, such as a drive belt being off. If it is moving. Then it could be that a tiny leaf switch has become broken or bent cutting the sound off. Other issues include a faulty switch that controls the switching from the radio to tape. Could be just dirt in the switch. Or the pre-amp failure of the cassette player.

GPX Audio... | Answered on Jun 25, 2018

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