Schematic wanted for SONY's CDP-553ESD RF Amp inside in BU-1C

[tiefbassuebertr]

Who can help me - I need schematic diagram of the rf PCB of BU1C (BU = Base Unit = CD transport mechanism include RF and Servo PCB's)
For this base units Sony must have service manuals - similare like Philips by the CDM1, 2 and CDM3
It should not be confused with the BU-1E, which is identical except the RF PCB and the RF circuit (CXA1081 instead CX20109). Also not with the type "BU-1".
By the way - the Laser Unit (optical pick up) is without type No by all BU1 variations.

I need especially the APC circuit include the P-SUB or N-SUB laser diode. The variable resistor (pot) of APC circuit is integrated on the RF PCB and not - as commonly to observe - on the optical pick up (laser head).

Follow BU1 variantes are inside by follow models:
BU-1 = BU1: CDP102 - CDP302 - CDP502ES - CDP520ES - CDP552ESD - CDP620 - CDP650 (CDP-102 - CDP-302 - CDP-502ES - CDP-520ES - CDP-552ESD - CDP-620 - CDP-650 CDP-502 ES - CDP-520 ES - CDP-552 ESD CDP502 ES - CDP520 ES - CDP552 ESD)
BU-1C = (X49082061) = BU1C: CDP303ES - CDP303ESII - CDP502ESII - CDP552ESDII - CDP553ESD - CDP620ESII - CDP650ESDII (CDP-303ES - CDP-303ESII - CDP-502ESII - CDP-552ESDII - CDP-553ESD - CDP-620ESII - CDP-650ESDII CDP-303 ES - CDP-303 ES-II - CDP-502 ES-II - CDP-552 ESD-II - CDP-553 ESD - CDP-620 ES-II - CDP-650 ESD-II) ACCUPHASE DP-70, DP-80, DP70, DP80
BU-1E = (X49150331) = BU1E: CDP333ESD - CDP555ESD - CDP605ESD - CDP705ESD (CDP-333ESD - CDP-555ESD - CDP-605ESD - CDP-705ESD - CDP333 ESD - CDP555 ESD - CDP605 ESD - CDP705 ESD - CDP-333 ESD - CDP-555 ESD - CDP-605 ESD - CDP-705 ESD) and Onkyo Grand Integra DX-G10

more details you will find there:
BU-1C:
ƒ\ƒj�[�@‚b‚cƒvƒŒ�[ƒ„�[�@‚b‚c‚o�|‚T‚T‚R‚d‚r‚cŒ^�i‚»‚Ì‚P�j
BU-1E:
CDP-555ESD‚̃XƒyƒbƒN‚Æ“à•”ŽÊ�^
1986Äê³ö²úµÄͬÆÚ²úÆ· CDP-555ESD 333ESD ... - ¾°´óÇìµÄÈÕÖ¾ - ÌÔ½*ºþ - ÌÔ±¦Íø
and by the attached photos:

[Salar]

Can I use the CXA1081 with KSS-123A?
On CXA1081, is Pin Nr. 4 a selector for p-sub/n-sub diodes?
(Low: p-sub High: n-sub)
Or has a n-sub diode to be attached to pin 4?
What about APC and current/voltages?
I want to try a (n-sub I guess) KSS-123A with a board with the CXA1081. The board is orignally intended for a KSS-213C. I read 0.6V for the kss-213C laser diode, I assume, voltage for the KSS-123a needs to be higher?

All the best, Sal

[tiefbassuebertr]

You need actually the data sheets both of CXA 1081 and KSS123A
from the CXA1081 you can use the data sheet of Samsung's KA9201 (direct replacement):
KA9201 datasheet pdf datenblatt - Samsung semiconductor - RF AMP FOR CDP ::: ALLDATASHEET :::
the data sheet of KSS-123A isn't to find online. Observe this thread in this case:
Databook about SONY's KSS optical pick up series
as long no data sheet isn't to find, you can only try to find out the cd player models uses both at the same time and then you can order the associated service manual.

[Salar]

Hallo Tiefbassubertragung,
vielen Dank for the link.
The aim is, to run a KSS-123A with a circuitry that was oruginally designed
for the KSS-213C (and probably suitable for many which werde brought ot after the KSS-123A).

One question about the APC:
Should the apc not be linear anyway? So that a designer could use almost any CD-laser-type, as long as it is based on P-sub/n-sub + 6 photodiode array?
All the best,
Sal

[tiefbassuebertr]

Originally Posted by Salar

Hallo Tiefbassubertragung,
vielen Dank for the link.
The aim is, to run a KSS-123A with a circuitry that was oruginally designed
for the KSS-213C (and probably suitable for many which werde brought ot after the KSS-123A).

One question about the APC:
Should the apc not be linear anyway? So that a designer could use almost any CD-laser-type, as long as it is based on P-sub/n-sub + 6 photodiode array?
All the best,
Sal

I don't know, what means exactly "P-Sub" and "N-Sub" Laser diodes consists in general of two diodes (except any modern high power light diodes for burner):
1) the Monitor Diode (also called Photo Diode or PD resp MD)
2) the actually laser diode (LD)
there naturally three legs (3 pin's)
One of the pins is the substrat leg on the enclosure of the cabinet housing from this diode.
follow pin-out is possible:
1) both kathodes on the substrat
2) both Anodes on the substrat
3) K,PD and A,LD on the substrat
4) A,PD and K,LD on the substrat
the terms P-Sub or N-SUB is refer to the LD or MD (PD) - that I don't know.
The detection reference of the APC-Circuit is - as I know - the light value and not the electrical current flow of the laser diode

[Salar]

As far as I understand the KA9201 datasheet , p-sub / n-sub refers always to the laser diode.
And I guess, the detection reference of the APC-Circuit is the electrical current flow from the monitor diode, triggerd by the lasser´s diode light emission...?

[artegagt]

"P-Sub" and "N-Sub"

[Salar]

Thanks!
looking at serveral cd-player´s circuits, the laser diode can be p-sub or n-sub, while the monitor diode stays p-sub...
Anyway, I wll try a KSS123A in a circuitry which is intended for a KSS-213C.When I am lucky, only pin 4 at CX1081 has to be put to "high".
Still, any information if the CX1081 APC circuitry is versatile to drive different types of laser diodes would be helpful...

[tiefbassuebertr]

Originally Posted by Salar

Thanks!
looking at serveral cd-player´s circuits, the laser diode can be p-sub or n-sub, while the monitor diode stays p-sub...
Anyway, I wll try a KSS123A in a circuitry which is intended for a KSS-213C.When I am lucky, only pin 4 at CX1081 has to be put to "high".
Still, any information if the CX1081 APC circuitry is versatile to drive different types of laser diodes would be helpful...

What information you need, which isn't mentioned about the datasheet link about post #3?

[artegagt]

There are circuit difference between kss-123 and kss-213.