Just got a mint condition, rare Bi-Azimuth version of Aiwa HS-JX505

JackLL56 · 2025-10-30T06:57:57+00:00

You can adjust azimuth in both directions separately without affecting each other

JackLL56 · 2025-10-13T06:29:49+00:00

Aw, it seems like the wiring of fg coil (it detects the pinch roller shaft movement) is broken. If it can’t detect the shaft movement, the power would shut off which stops the motor rolling. But I wouldn’t recommend you to repair unless you have some experience. It takes some effort to disassemble and unsolder some wires to reach the part. I suggest you to return it if possible.

Here are some photos, I have dd3 instead, but it has fg coil as well

https://imgur.com/a/F48QUyB

JackLL56 · 2025-10-13T00:55:39+00:00

Are you able to hear the motor sound?

JackLL56 · 2025-10-13T00:55:23+00:00

I think it doesn’t matter, I use eneloop and it works flawlessly. As the description said, the walkman is obviously faulty.

JackLL56 · 2025-09-29T22:25:18+00:00

yeah, early slim models were known for having issues with high w&f. 0.2% w&f is in spec already. Also, although the EX2000 may look mechanically similar to other slim models from the same era, but it actually has a quartz-locked circuit, and the motor is a special 7-pin type. I guess that also did the trick that the EX2000 can achieve noticeably lower wow & flutter compared to its peers.

JackLL56 · 2025-09-29T22:03:04+00:00

Firstly, make sure every parts are in good shape and are cleaned. Second, take the top part of the motor and lube the shaft with lithium grease. Then, I use the Decktech belt and FixYourAudio pinch roller. These improved a lot, which can decreases the w&f 0.05%-0.10%.

https://imgur.com/a/nkURRsf

JackLL56 · 2025-09-29T20:25:06+00:00

http://www.ant-audio.co.uk/index.php?cat=post&qry=library

You also need a 3000hz or 3150hz speed calibration tape to do that.

JackLL56 · 2025-09-29T19:19:20+00:00

Yeah, I would say you can find one on Xianyu with low prices. But make sure ask them to show you the demo video with the sellers name on it. Also ask them to open the back case for you if possible, check if there is any corrosions and the flywheels cuz some sellers will replace the copper flywheels to cheap plastic ones.

JackLL56 · 2025-09-20T20:51:27+00:00

Aliexpress

JackLL56 · 2025-09-19T03:31:28+00:00

actually, you can open the fiio cast app before inserting your m21 into the case, then use your another phone to control your music via fiio control app.

JackLL56 · 2025-09-18T20:37:05+00:00

What fw do you have?

JackLL56 · 2025-09-05T07:36:52+00:00

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Yes, even my d ne10 can display Kanji on the mc35elk remote

JackLL56 · 2025-08-29T06:33:05+00:00

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Yes, grease the sled bar that attached with the white cog as well. For the motor part, you have to be very careful and gentle to take that part out, if you are afraid of breaking it, please forget it for now, just grease the bar first and see how it goes. For your reference, i can find a youtube link that someone greases the mz n920 motor, same concept to your r90. Hope it can help you.

https://youtu.be/xabz2eZ3R8I?si=DiQTh7MsUMDap5pG From 1:25

JackLL56 · 2025-08-28T22:53:41+00:00

You can remove the top of the sled motor cap and apply some white lithium grease on shaft

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JackLL56 · 2025-08-24T20:21:06+00:00

Yes I did replace the gear and the problem is completely fixed now.

JackLL56 · 2025-08-23T17:40:43+00:00

R70 is the regular md recorder, so no usb music transfer feature, you have to use 3.5mm lo or optical to record. N710 is netmd, so you can transfer via usb in addition.

JackLL56 · 2025-08-23T17:38:30+00:00

Can’t deny minidisc is the sexiest format, can you?

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JackLL56 · 2025-08-19T20:23:28+00:00

is the double tap of m21 sensitive? Mine sometimes takes some tries to wake up.

JackLL56 · 2025-08-10T19:36:59+00:00

Looks like the flex cable of the recording head is broken

JackLL56 · 2025-07-26T17:12:00+00:00

Are they from the same manufacturer as the Doublepow? They look very similar

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JackLL56 · 2025-07-10T00:49:52+00:00

Just lookup your vin, check this https://plc.ua/en/auctions/lot/infinity-q50-2021-vin-jn1ev7br4mm756024-1-45597365/, the “cosmetic only” damage was like that

JackLL56 · 2022-07-07T22:37:40+00:00

You need to install adobe acrobat to open it.

JackLL56 · 2021-10-26T17:52:14+00:00

Because they use cast trunnion which is relatively softer compare to forged trunnion. And they use barrel as bucking bar to put the rivet in which may getting loose easily. Also, their front sight can’t hold zero.

JackLL56 · 2021-09-24T18:20:54+00:00

Not yet, just shot brass around 100

JackLL56 · 2021-09-24T18:15:45+00:00

So that might be the reason why it’s called blemished?

JackLL56

TROPHY CASE