CDM Building questions

Kip · « **Reply #20 on:** 22 Jan 2005, 07:33 pm »

Hi Steve, Sorry to keep buggin' you.

The diodes are installed correctly. Both black lines installed with the white line on pcb (both facing away from the photo sensor). I since checked all values on the board and compared them to the photo in the manual. All caps are installed correctly as wll as Q5, U7 and the Molex. At the connector on the display pcb, I assume pin 1 (square pad on pcb) is ground and pin2 and pin3 both have +5v. Sensor1 has the markings toward the pcb.

bkloos · « **Reply #21 on:** 22 Jan 2005, 08:46 pm »

Also.... With the diode placement, I believe you are supposed to line up the white line on the diode with the white line in the PCB, correct?

BK

Kip · « **Reply #22 on:** 22 Jan 2005, 09:07 pm »

Hi bkloos,

I have the diodes lined up that way. It is a bummer. I have the Audio Note DAC1.1x and I am dying to try it with the CD-PRO. I have the Audio Note sold and the buyer said I can keep it to try with the new transport, but no luck with a non-working unit. I will have to send the DAC1.1x out on Monday. I am hoping that I can get the transport repaired before then. I am sitting now wondering what to do. I have double and tripple checked all parts on the sensor board and find nothing wrong. I wish there was a way to jumper out the sensor board just to get the transport to read and play a disk. I know it is there to protect the user from the laser, but it would be nice to try as I find out what is wrong with the sensor pcb.

bkloos · « **Reply #23 on:** 22 Jan 2005, 09:10 pm »

Kip,

What does the lowest LED on the VFP board do when you power up the unit both before and after you switch the toggle?

ken_diyzone.net · « **Reply #24 on:** 22 Jan 2005, 10:05 pm »

1. Check Q1 to Q5 on VFD module. Make sure they are in correctly.

2. When you power on, with no CD inside, how many LED is on? Should have only the lower one on.

3. Then when you use the toggle to really power on, still with no CD inside, you should see the top 2 LEDs on, and bottom one flashing.

4. If you pass the two step above, and then insert a CD. Then you should see the top two on, and bottom one off.

5. If you have the CD inside, and all three LEDs are on, that means your detection module is too far away from the CD.
a. Please check to make sure the sensor is perpendicular to the CD.
b. The sensor is no more then 1/2" from the CD.

Let me know..

Thanks
Ken

ken_diyzone.net · « **Reply #25 on:** 22 Jan 2005, 10:11 pm »

Hi Kip,

BTW, does it really say "Open" or "No disc"? I don't thiink I've ever seen an "Open" before.

Thanks
Ken

Kip · « **Reply #26 on:** 22 Jan 2005, 10:34 pm »

Sorry for the delay. I had to snow blow my 300' driveway.

bkloos,

The lowest LED is on before I toggle the switch and flashes after. The two above go constantly on.

Ken,

I don't see a Q5 just Q1 to Q4. All are installed the same oriontation as shown on the pcb.
When I power up only the lower (red) LED is on. When I hit the toggle switch the lower LED blinks and the two above then come on and stay on. The display at this time says "OPEN". It does not say No disk. I have used these sensors before in machinery. I have tried to place an object at all close distances from the sensor and nothing changes. Before when I had the +9 power supply issue and did not install the CD-PRO, I had dashed lines in the center of the display. Now that all power supplies are correct and I installed the CD-PRO the display has read OPEN. This has been the same since before I received the diodes.

Kip · « **Reply #27 on:** 22 Jan 2005, 10:41 pm »

Q2 is A970. Q1,Q3 and Q4 are 8099.
The L shaped mounting brackets do have an insulator behind them and are not shorted.

Before too many of you worry about my skills. I worked as a tech for a government contractor for 7 years. My soldering skills are very good. We had to be tested once a year per the government contract. I always finished class a day earlier then everyone else and at the top of my class. We were also trained in ESD once a year so static issues with the IC should not be an issue I handled them with care. I realize it is very cold outside here in Pa and the air is dry causing much static. I have been very carefull with all componants. Also no pins on any of the ICs are bent. They are all seated correctly in their sockets. I don't have much repair knowlege, but with good direction I can find and repair the problem. As shown with the +9v supply issue (thank you again Steve). At this point I at am at all of the AudioCircle techs mercy.

ken_diyzone.net · « **Reply #28 on:** 22 Jan 2005, 11:33 pm »

Hi Kip,

I was outside pushing snow also.

Yes, only Q1 - Q4, sorry.

OK, Now on to VFD debugging

1. Check to see Jumper 1 and Jumper 2 are set properly.
2. D1, D2, D6 and D7 diodes need to be in the right direction.
3. R1 and R7 resistor network. R1 is a 7 pin resistors network,
R7 is a 8 pin resistors network. Make sure both R1 and R7’s common ground (marked by a gray dot) are inside the drawn box on the PCB.
4. There are 5 ICs on the board, two are 20 pins IC, but they are different ICs. Please check against the parts list to make sure they are properly inserted.
7. R12, R16, R38, R39 are shorted, make sure is this done.

Lets see if these will do the trick.

Regards,
Ken

ken_diyzone.net · « **Reply #29 on:** 22 Jan 2005, 11:44 pm »

Kip,

One more thing,

The crystal oscillator Y1 and Y2, the metal shell need to solder to the GND point.

Regards,
Ken

Kip · « **Reply #30 on:** 22 Jan 2005, 11:47 pm »

Everything you stated above is correctly installed and soldered.

I am only an hour and a half from you. We have at least 10" of snow so far.

ken_diyzone.net · « **Reply #31 on:** 23 Jan 2005, 12:00 am »

Hi Kip,

Well, this is the end of my debugging ability. I have sent this issue to our guys in Taiwan, will let you know at once when they write back.

Thanks
Ken

Kip · « **Reply #32 on:** 23 Jan 2005, 12:11 am »

Thanks for the help. Hopefully they will have a solution. I have checked over the board 3 times against the parts list and assembly procedure.

ken_diyzone.net · « **Reply #33 on:** 23 Jan 2005, 01:16 pm »

Hi Kip,

1. On the sensor board, please check OPB743 and PS8099's direction.
2. If still not working, might need to send you some IC's to swap out.

Let me know.

Thanks
Ken

Kip · « **Reply #34 on:** 23 Jan 2005, 01:32 pm »

Good morning Ken,

There are 3 8099's and all are in the correct orientation as shown on the pcb. I don't know where the OPB743 is or what it is.

ken_diyzone.net · « **Reply #35 on:** 23 Jan 2005, 03:32 pm »

Hi Kip,

When I say sensor board, I was referring to CDPRO_OPT_PCB. The PCB that is mounted next to the CD-PRO2 module. It detects CD’s existence.

Please check:

1. When OPB743 (the actual sensor, the pyramid looking one, with the 2 LEDs inside), is properly mounted, the “white lettering” side should be against the PCB board AFTER bending.
2. On Q5 (next to the Molex position), the edge on the PCB drawing is reversed. The flat edge of Q5 should be parallel to the edge PCB board.
3. The Molex socket on this board should follow page 16 of the installation manual.

Off to clearing snow.

Will check later here later..

Regards,
Ken

Kip · « **Reply #36 on:** 23 Jan 2005, 03:39 pm »

Sorry about that Ken,

The optical sensor is installed with the white lettering toward the pcb. Q5 is installed with it's flat edge toward the top edge of the pcb and the Molex connector is installed with the slots facing the outside edge of the pcb. I have tested the OPB743 and find 5v on the LED side and .87 volts on the receiver side. I do have a cheap 5mhz Philips scope. I put it on the output (I think the two pins away from the connector) and see the .87v, but when I put my hand infront of the sensor nothing changes on the scope.

How will this fix the OPEN displayed when it should read No Disk? If I unplug the cd sensor pcb the display doesn't change. If you unplugged your cd sensor board does it display OPEN?

ken_diyzone.net · « **Reply #37 on:** 23 Jan 2005, 04:51 pm »

Kip,

You are right, when I unplug the Molex from the sensor board, it says "No Disc", not open. So the issue is probably on the VFD\Control board.

I think we are getting down to bad ICs, I'll send you a new set of IC's for the VFD\Control board on Monday, lets swap them and see if that solve the issue.

Sorry for the issues, but hey, fun of the DIY world.

Regards,
Ken

Kip · « **Reply #38 on:** 23 Jan 2005, 05:52 pm »

Hi Ken,

As long as I have help to resolve the issue, I am happy. Yes I wish it was up and running, but like you stated "hey, fun of the DIY world".
This transport/cd player should be awesome when finished. Separate transformers for each power supply and parts quality is great. Plus I can't leave out the support and the many possible tweaks.

I do have a question if anybody can answer. Should I see some sort of an output change from the photo sensor when using the scope?

Kip · « **Reply #39 on:** 24 Jan 2005, 02:17 pm »

Ok. I have found the problem. One of the wires connecting the display/control board to the CD-PRO had a bad crimp. I now get No disk, but the cd sensor still does not see a disk. If I install a disk in the player before I power it up, it will read the disk and play, but the bottom LED (red) still blinks telling me the sensor part is not working. When I change disks I must use the change button on the remote or toggle power and it will then read the new disk info, but the bottom LED still blinks. Placing a cd in the player when No disk is displayed forces me to push the change cd button on the remote or toggle power for the player to work. This is my last issue. Any help will be appriciated.