Topic: iriver H1xx Tapers FAQ (beta)

[hyperplane]

i just thought of another couple of tidbits that would be useful for someone performing the battery upgrade/replacement...

- not shown in the pictures at the previously mentioned site with iriver battery replacement instructions, is this: the top of the hard drive in the iriver has a type of rubber on the top (i presume to help with shock absorption). on my H140, this rubber shock piece has "glue" at two ends, so it's prudent to pull off this foam piece SLOWLY.

- there are some small parts that can (and DID, for me) fall out of the iriver once you have it opened up... for instance, when you look at your iriver from the front on the outside (as if you were looking at the LCD screen), notice the two lights around the "joystick" (one is green, when the iriver is charging up, and the other light is red). on the inside of the iriver, when you open it up, right around those green and red lights are small rubber pieces... those fell out when i replaced my battery. they are SMALL, like everything else in the iriver, so be careful not to lose them.

i suggest doing the battery replacement at a kitchen/work table with plenty of room all around. that way if something comes out, it's more likely to stay on the table.

happy modding! 

[tod3sschu3tze]

in fact very nice, thx!

[shaggy]

Mistic River's Detailed Instructions on how to remove the H1XX battery (includes photos).

http://www.misticriver.net/wiki/index.php/H1xx_Internal_Battery_Replacement

If people have success, could they please report which ebay vendor they used and the general description of the battery they purchased?

[joolz]

Aye, success here with a 2200mAh Ipod battery. I am in the UK, so. probably not much use to you shaggy, but here goes...

"APPLE IPOD 1G+2G HIGH CAPACITY REPLACEMENT BATTERY KIT!"

http://stores.ebay.co.uk/THINK-MOBILE_APPLE-IPOD-BATTERIES_W0QQcolZ4QQdirZ1QQfsubZ4QQftidZ2QQtZkm

The battery part number is UP325385A4H   (3.7V/2200mAh)

I'm sure you can get cheaper in NA, you usually can...

[George]

Very nice.  I'll keep this in mind once the battery in my H140 starts to lose its charge.

[whatboutbob]

You may be waiting a while George. Those batts have a pretty decent life.  Used mine for about 2 hrs/day for a year with minimal impact.

Just a quick update on rockbox. The 3.0 release is delayed indefinitely.  There are some critical outstanding bugs (not recording related) that they're working through. I'd say if you've got a stable build, stick with it.  My guess is they'll have 3.0 out in the next couple of weeks...but that really is just a guesstimate.

Petur's also got me testing a patch which lowers boosting during recording.  If it works it'll increase battery life.

I hope it goes without saying, but if anyone has any probs with rockbox recording, please speak up, otherwise I'll assume its all hunky-dory and feed that back to the developers.

oh...and stay away from the plugins...those stupid games are ridiculously addictive.

[Gawain]

now recording with rockbox decreses the battery to half size than playing files, am I right? (more or less: 6-8 hours)...so what is expected after the developers improve it? close to 10 hours maybe?

and well, 3.0 will be just like a daily built, as I've read, so I'm not in a hurry  I'm running 12th of May one and I'm happy 

and thanks for all the tips concerning replacing batteries!!

[gmm6797]

I won this yesterday: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=9733423014

One for my iriver and one for the wife's  (read as: I have 2 of these, just in case something happens to the 1st one, my MT or my R1).

They shipped today, so I expect to have them on Sat, so I will keep everyone posted.

[whatboutbob]

Any respectable taper needs his backup(s).

[gmm6797]

respectable

Not sure I fall into that category 

[whatboutbob]

I've got one if you can't find one for cheaper than $10 (cost of shipping from Australia).

[whatboutbob]

crap crap crappety crap.

I just did some tests on 'remote interference'.  Can't believe I haven't noticed it before.  I just wrote the noise off to mic shortcomings...how wrong I was.

I set source to line in, didn't plug a mic in, then recorded w/ a varety of gain, then measured noise floor (in dB):

First with no gain (left channel, right channel):
           
w/ remote: -84, -81
w/o rem:    -84, -84

20dB gain:
w/ remote: -72, -63
w/o rem:    -81, -81

48dB gain:
w/ remote: -42, -36
w/o rem:    -52, -52

I repeat: crap crap crappety crap.

LinusN (one of the lead rockbox developers) is convinced that the main iriver units aren't grounded properly...some worse than others.  As soon as he said that, the penny dropped for me...I think I know now what the damn source is of cell phone interference I've encountered in some of my recordings.  Unless I'm mistaken (and that's entirely possible) the remote is essentially acting like a giant antenna.

So, now all we need is one of you electronics gurus on here to confirm that this is the issue, and figure out a way to fix it! (please!). :-)

edit: According to Linus: 'the problem is that the analog and digital ground are connected on the ticking units...most likely a mistake, since there is still a resistance.'

I gotta go eat humble pie in another thread now (apologies to chinarider).

[Sanjay]

well with an external pre the noise floor issue is essentially a moot point.

shielding the remote might help some if you managed to take it apart and maybe replace the wire with a better shielded version. 

[hyperplane]

Just ran my own tests, whataboutbob, and below are my results.


First with no gain (left channel, right channel):

w/ remote: -96.1 / -95.97
w/o rem:    -95.05 / -96.05

24dB gain:
w/ remote: -64.37 / -65.37
w/o rem:    -87.71 / -87.9

48dB gain:
w/ remote: -59.87 / -56.78
w/o rem:    -64.56 / -64.64


Based on my findings, mentioned in another thread, these results will need to be double-checked... i.e. the results I list above are Maxmum RMS Values reported by Adobe Audition. There is apparently HDD noise, therefore said HDD noise would affect the values.

[hyperplane]

Sorry for being a post-whore, but I double-checked the results. Here was my process: I boosted the Waveforms by 30 dB to spot where the HDD noise (HDD spinning?) was located, then used the UNDO function to get the WAV back to its original volume level... then selected a section *without* the HDD noise and used the "Statistics..." function in Adobe Audition to get the following Maximum RMS Values:

0 dB gain

w/ remote: -96.10 / -95.96
w/o rem:    -96.10/-96.08


24 dB gain

w/ remote: -85.16 / -81.51
w/o rem:    -87.20 / -87.27


48 dB gain

w/ remote: -59.87 / -56.78
w/o rem:    -63.27 / -63.11


At the shows I've recorded, I've only added a maximum of +17 dB of analog gain using the iriver (at 3 shows thus far, all moderately loud... not quite as loud as an arena show, though). This is using the 3-wire powering for AT831s (which do not put out a hot signal at all, compared to 2-wire powered AT831s, IME). So is the approximate 6 dB of noise floor added going to make a big difference??? Anyone?