opa 627bp in MHZS cd33

hi windwss,

it can be used in our cdp.

Thanks.

Hi superwhite,

I also replace it to Jensen 10uf/150v, sound is very good.
I think if replace to 220uf is no problem, it will be more prowful, but a litte bit affect in high notes.
I suggect to follow same value of 100uf.

I would like to know what the result the cdps meeting today.
how much of the 627au with pcb and black gate ????

Thanks for sharing.

Hi superwhite,

Do you want make your cd 33 have 20% improvement ???

answer is very simply as follow:

Only change the clock to 1ppm la !!!!!!!!!!!!!!!!

Just HK$100
Photo as follow:

Hi superwhite,

Very nice photo.
If you can find the clock in your place, i very recomment to install it.
when installed it, you are un-belive your cdp will provided Hi-end sound.
(solid, clear, background  silent, powful and musical).


Thanks for sharing.

Hi windwss;


The Jensen and solen authorized dealer in Hong Kong as follow web site:
www.soundexplorer.com
other place :
www.vocativeaudio.com
other shops in APLUI STREET,SHUM SHUI PO.KOWLOON Hong Kong
there are many shops can buy the parts.

Hi superwhite,
No model number. you can try to find 1ppm clock in your place. the sales may known what you want. good luck.

Other if windwss's friend go to Hk, may ask him to buy it in this shop :
http://www.diykits.com.hk/

Thanks for sharing.

hi superwhite,

otherwise, you can buy it's kit  from HiFifever. call kk, he will help you to buy install it.
http://www.hififever.com/forum/download.php?id=4516
http://www.hififever.com/forum/download.php?id=4525
http://www.hififever.com/forum/download.php?id=4526

if you add full set of clock kit the costs is high but big improve.
only replace clock is quite good. upto you.


thanks.

Hi superwhite,

1. May be the tube have problem, you can try change it back to 6n3 test????

2.May be the opa627au fixed not well, is it fixed on IC base ???

3.Check all solder point of souns pcb?????

4.Changed back opa 2604 ????????

5. It may be the black gate 0.47uf. because normally use 0.1uf. I am not sure than is it bigger uf will affected the 627au.

I also use 627am metal package with 0.1uf/630v film caps no problem found.

if you changed back opa 2604 and tube 6n3 also got noise, check the ground of outup at RCA with PCB or the black box beside of the RCA outup.

Hope to help you to soft problem.

Thanks.

Hi superwhite,

I have exprience on it in my pocket headphone amp, when i changed it from 627ap to opa627bp the result same to you cdp, when i changed it back, the problem softed.
i check data sheet, the gain have some different. so i think you have same problem, if changed it back to 2604 first, if no problem that the gain of cdp33
not suitable on 627au. or 627au is samll package they will affect by heat.

anyway change it back to opa2604 first.


thanks.

Hi superwhite,

I have try the following opa also no problem.
1.NE5534; singal amp
2.opa2228;
3.opa134; single amp
4.opa797; single amp
5.opa2134;
6.AD827; and
7.opa2111;
8.LT1057;
9.opa2604.

thanks.

hi superwhite,

I suggest you if the problem soft when you changed back to opa2604, you can used OPA627AM or OPA627BP with 0.1uf standard package. same to our cdp33's photo before.


thanks.

Hi superwhite,

the pin 4 & 7 of 627 should be -15 and +15 volts respectively to ground. Check again, may be this is the fault.

TEXAS INTRUMENT opa627 is same as Burr-brown opa627 because BB is belong to TEXAS INTRUMENT.

You sd bypass opm with resistors, it depend on the resistor quailty and are you well in cdp33's  electric layout.
don't try it.  if you are not  really expert on it, it will be burn. becare !!!!!!!!!!!!!!!!!!!!!

Thanks.

hi superwhite,

enclosed my opa627am with 0.1uf/630v film caps.

Hi superwhite,

try again on pin4 n pin7 using your SANWA multimeter,
one point touch pin 4 one point touch ground.
one point touch pin 7 one point touch ground.
the action is separted.
don't one point touch pin4 and one point touch pin7 at the same time.

try again. and let me know.

thanks.

Hi superwhite,

try connect gound whith cdp33's ground

Thanks.

hi superwhite,

can you post back side of opa board.

thanks.

Hi superwhite,

one point touch pin 4 and ground connect the white colour area.
pin 7 also.
I think the white colour area is connect with ground from power socket.
please check first.

yours photo enclosed.

thanks.

Hi superwhite,

I very happy to hearing from you. It dosen't matter.
enjoy the music.

Hi superwhite,

I am not expert on tube. so I cannot give you comment. sorry!!!!

anyway "D" or "O" just listen you. belive your ear.

I only belive my ear.

Thanks.

Hi windwss,

I totally agreed with superwhite's comment.

This is diy fun la !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
You can learn much in diy.
If you got diy main point and experience, you will save a lot of money and got very good sound for your tastes.

Thanks for sharing.

Hi superwhite,
HE CAN BUY IT AS FOLLOW WEB SITE:
ADDRESS OF THESE COMAPANY WHICH MENTIONED IN ITS WEB SITE.

www.soundexplorer.com

www.vocativeaudio.com


Thanks for sharing.

hi windwss,

they have modification services, he can ask them.


Thanks.

Hi windwss,

I think anyone who have his taste, I will not gave comment on which tube is the best, I only belive my ear.

I think superwhite's  modified cdp is situable his taste.


Just for sharing.

Hi windwss,

I suggect you to use at lease 40% more volts  of e-cap  is better which measured voltage is 115V.  

You  measure the voltage across my 47uF/160V e-cap & found that the measured voltage is 115V, in this case, use 47uf/160v is save.

have you modified it or consider a DAC??????

thanks for sharing.

hi windwss,

My cd33 also connect with Lite DAC-AH (heavy modified).

sometime listen CD33, sometime listen CD33 with DAC-AH, very enjoy both.

I also have other system:

CD Transport (Audio Alechemly DDR pro)
Diyeden 01 Plus DAC moidified.


Thanks.

Hi windwss,

My LIte DAC-AH's photo which duty heavy modifiacetion.

add clock,
add changed e-cap with flim caps in power supply,
changed all box cap to UCC spp caps.
changed outup caps to ERO MKT 10uf/ with MKP 0.1uf/
changed opa from opa602 to AD797AH (Metal case.)

Thanks.

Hi superwhite,

I only like to coxial outup to DAC. because its sond become solid and 3D and
detail than optical output.

It is the fact of difference between coxial and optical outup.
You may try it. just fun.

I also changed the curists of opa from - input to + input, because china dac like to copy other DAC. so sometime has a problem. when correct that point, the sound is become real and 3D much than original. although the DAC is use Philip TDA 1543  eight pieces in parallel.

thanks.

Hi superwhite and windwss,

It is the original Lite DAC-AH reference photo (red pcb) for sharing:

Thanks.


Windwss,

spp cap is shap than scr solen. but scr solen is musical than it a little bit.

I use spp cap is base on TDA1543 is warm and slow sound, so i use it to let the sound clear.
If use in you CDP i think you can try spp cap will be make the sound clear.
up to your taste.

Thanks.

Hi superwhite,

My lite dac-ah was buy from 2nd hand market in HK at $480.00 only, brand new is HK$780.00  and mofidication cost used around HK$1,500.00.
althought cost is high, but its sound is better than some oversea dac price around $8,000.00 because i do have compare with my friends DAC.
They also buy it and do modifity.

It compare with MHZS CD33 after modified, the result is very very close
Is it can buy in your country ???????

Thanks for sharing.

Hi superwhite,

I have try cdr in cd33, no problem.

but I suggect don't read cdr too much, because read cdr, the leaser light must be high, although the leaser head had auto detect. since then the leaser head's life will short.


Thank for sharing.

Hi superwhite,

Panasonic FC e-cap is quit good (musical) sound. which is for audio use.
other ELan for audio, Nichicon muse, EOR, Rifa is ok.
remark Rifa e-cap is high cost but lower than black gate e-cap.
Nichicon muse 90% same as Black gate stardard type.
Eor is very sweet and warm sound.
Rifa for high notes, very clear sound.
I also put psnasonic FC e-cap in my poocket headphone amp, it provide sweet and musial sound. it is 70% same to black gate. I think is situbale your cd 33. or Nichicon muse.
because you used M-cap it can make it soft.
black gate stardard e-cap provided powful than it.
black gate N type for outup.
Black gate FK and Stardard for power supply.
FK is high costs.
Just my view.

Thanks for sharing.

Hi superwhite,
psnasonic FC e-cap is good for audio must better Robyon stardard style.
I think when you replace it, your cdp's sound will be muscial than now much.

I am wait for your modification.

Thanks.

Hi windwss,

Wima black box 0.1uf/400v costs HK$20 each.
I think wima box is not suitable with ucc spp cap, because ucc spp cap's sound is same as wima black box, if parallel with it the sound will very bright.
it better parallel with scr solen.

PB-MKP-FC  this is the old type of solen not good
The SCR is film & foil. normally the coloue of the side should be red in HK.
But also have black, gery coloue upon the dealer request. But the main body must be black colour, expect the high grade tin foil cap is white colour with black colour words for main body.

Thanks.

windwss

solen scr +0.1wima black box is better.


thanks.

windwss,

ok la.......


thanks.

hi superwhite,

Focal audio FS78s. very good sound.
price around HK$20,000.00


Thanks.

Hi superwhite,

Others

1. PaoAc Response 1.5 or 2.5; made in England.
2. Sonus faber concerto grand pinao; made in italy
3. Sonus faber grand piano home, Made in italy
4. Monitor Audio; made in England.


Thanks.

Hi superwhite,

If changed to Jensen caps can help the bass.
what speaker are you used ???????????

Thanks.

Hi windwss,

run in cap around 30 hours to 50 hours.
it must better than roybon stardand type.


Thanks.

Hi windwss,

Elna duorex  is better than FC much, no need to changed la !!!!!!!!!!!!!!!!!
because Elan Duorex is best of Elna.

Thanks.

Hi superwhite,

If the sound no different, just the cap still good condition.

Thanks

hi windwsss,

1.Try to add oil between wheel and wheel of the leaser haed machine. it make it smooth. "click" sound may be occurred by this problem,
2.clean the leaser head may be dusty and dirty.

upon the above causes, the leaser cannot move at the right postion to read the cd.
If both cannot soft the problem. May be the control IC down.
SO must repair.
good luck!!!!!!!!!!!!!!!!!!!!!!!!

Thanks for sharing.

Hi windwss,

Have you try my suggection and KK Ho's suggection?????

have you test the cap is under working or damaged?????
have you try to replace the new cap ????
This cap i think is for power supply.
I have this problem. when add oil and check the wheels and clean the leaser head, it is fine.
Also check all the cables connection.
Have you release the electricity from the new caps. because it may got the electricity, when you haven't release it, it may attacked the IC.

Thanks for sharing.

hi windwss,

MCU is the Philip marked at you photo.


Thanks for sharing.

Hi windwss,

If checked overall is fine, that the problem occurred by the leaser head,
you may consider replace the leaser head or the motor of leaser head's machine or the wheel may broken.


Thanks for sharing.

HI WINDWSS,

You sd the cdp can play the cd now but no sound,  Is it correct???

I think the 2 small transistor were problem.

Thanks

Hi superwhite,

Sorry I have no experience on relay.

You can ask K.K.HO. who is expert in this.
If relay no sorting it is no problem.
Have you have the cables (ground) connected with pcb's RCA outup is well or not.

THanks

Hi windwss,

I think your cdp's VDF was burn. call k.k.sir to help you.

Clean lease head:

use 火洒加水.塗在 cotton and clean the head

thanks.

Hi superwhite,

I think the problem is caused by the relay, you try to replace it.



Thanks.

Hi windwss,

It is true, but I suggest add water not oly 火洒.

Thanks.

Hi superwhite,
i measure the relay voltage also 5.6V.

From your photd, I foumd that the silver cable which connected with the grounding on the pcb is look like not fixed.

I would like to know what modification before the cd33 no sound.

Thanks for sharing.