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ellisr63
Sony Enthusiant
Joined: Jan 24, 2006
Posts: 26
From: Concord
 |  Posted: 2006-01-25 00:44
I have searched and found in the threads some info on flashing the eprom and adding rs232 cabability... I need to get more detailed info so I can convert my cx985 changers and gain the rs232 port for control...If anyone has this info please let me know. I think mine is one of the newer cx985 units so I will be replacing the prom with a 777es eprom too (unless that isn't required for the rs232 port to work).
tia,
Ron
followup:
I got into service menu on both changers..
changer #1
rom 1501
version rom check sum=881f
model type=00
eeprom check
nand flash check=inferior block 0050A000
Changer #2
identical except...
nand flash check=no inferior block
I take it that this means that #1 would just require a flash and the serial board mod and #2 would require the 777es eeprom and the serial board mod? Is this correct?
[ This message was edited by: ellisr63 on 2006-01-25 17:19 ]
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jehill
Sony Senior Advisor
Joined: Mar 13, 2003
Posts: 13791
From: Sewell, NJ
 | Posted: 2006-01-25 18:36
Are you talking about a mod that adds an RS-232 connector, because I don't see one on the player. If so, I am unaware of such a mod.
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-John
Sony A/V System: KDL-55XBR8, BDP-S550, AVD-C700ES Super Audio CD/DVD Receiver, 4 SS-LA500ED surround speakers, 1 SS-LAC505ED center channel speaker and 1 SA-WD200 Active Subwoofer
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jehill
Sony Senior Advisor
Joined: Mar 13, 2003
Posts: 13791
From: Sewell, NJ
| Posted: 2006-01-25 19:00
Ok! Now that I have read the other thread, I understand what you want to do. Its a bit pricey, but one option that you have is to purchase the DVP-CX777ES RS-232C BOARD, COMPLETE for $93.11 here. Just search for Part or Accessory Number a4733703a.
-----------------
-John
Sony A/V System: KDL-55XBR8, BDP-S550, AVD-C700ES Super Audio CD/DVD Receiver, 4 SS-LA500ED surround speakers, 1 SS-LAC505ED center channel speaker and 1 SA-WD200 Active Subwoofer
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ellisr63
Sony Enthusiant
Joined: Jan 24, 2006
Posts: 26
From: Concord
| Posted: 2006-01-25 21:21
Thanks for the info..A friend of mine said he would do it for me.....I've been trying to get a hold of Surgeon to find out what the parts list is (from the other thread it appears it's only $10 in parts for each changer). I have the manuals now for both units. From what I understand even once you are done you need a firmware mod (in addition to the flash) to get 100% functionality. Hopefully someone who has done it will respond with the needed info.
Ron
[ This message was edited by: ellisr63 on 2006-01-25 21:22 ]
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jehill
Sony Senior Advisor
Joined: Mar 13, 2003
Posts: 13791
From: Sewell, NJ
| Posted: 2006-01-26 15:04
You probably skipped over it before, but if you start reading here, it appears that the solution is to purchase and install IC106 for the DVP-CX777ES, Part No. 680347701 available for $55.52 here if you live in the US. Just search for Part or Accessory Number 680347701.
-----------------
-John
Sony A/V System: KDL-55XBR8, BDP-S550, AVD-C700ES Super Audio CD/DVD Receiver, 4 SS-LA500ED surround speakers, 1 SS-LAC505ED center channel speaker and 1 SA-WD200 Active Subwoofer
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ellisr63
Sony Enthusiant
Joined: Jan 24, 2006
Posts: 26
From: Concord
| Posted: 2006-01-26 20:55
On 2006-01-26 15:04, jehill wrote:
You probably skipped over it before, but if you start reading here, it appears that the solution is to purchase and install IC106 for the DVP-CX777ES, Part No. 680347701 available for $55.52 here if you live in the US. Just search for Part or Accessory Number 680347701.
Thanks, Now I just need the firmware update and the mod to the firmware that Surgeon made to get the rs232 port to work. Still no responce from Surgeon yet. Hopefully soon or ...hopefully someone else will have the modded firmware.
Ron
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Surgeon
Sony Devotee
Joined: Jul 07, 2004
Posts: 84
From: USA
 | Posted: 2006-01-27 08:58
The nand flash check/inferior block count has nothing to do with determining if the unit's main system eeprom is flashable or not . The nand refers to a totally separate flash memory chip where the disc title data is kept. An inferior block just means that part of this storage area is marked as bad/unusable, similar to the bad sector marking on a computer's hard disk drive during formatting. Some units have a few of these 'bad sectors' while others don't...
The only real way to tell if CX-985V has a flashable eeprom (aside from trying the flash upgrade procedure and verifying that it has new firmware afterwards) is to remove the main board and look on it's bottom side for IC106 and compare it with the pictures I posted on the bottom of this page (I've updated the links):
http://www.agoraquest.com/viewtopic.php?topic=13878&forum=50&start=90&select_page_number=10
As long as you have a unit with a flashable eeprom it can be mod'ed to the same rs232 abilities as the CX-777ES fairly easilly by someone with moderate electronics soldering skills.
If the rom is of the non-flashable type, your friend must have very advanced skills working with surface-mounted chips... Replacing the IC106 rom chip with the one jehill reported above for the CX-777ES is not for the faint hearted!
In any event the first step is to make sure you can flash upgrade your units as described in the other posts on this board. If you get that step accomplished successfully let me know as it's been a while since I've played with this but I'll dig-up my notes and put something together for you on the rest of the rs232 mod...
-Surgeon-
[ This message was edited by: Surgeon on 2006-01-27 09:21 ]
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ellisr63
Sony Enthusiant
Joined: Jan 24, 2006
Posts: 26
From: Concord
| Posted: 2006-01-27 13:02
Hi Surgeon,
It sounds like chances are all of the units are going to require a 777es chip (mine that is...as I purchased mine in 04..that would be my luck) . when the chip is replaced and the rs232 part built....will the 777es have full functionality or will it require your modded firmware? Also has anyone tried this on a cx995?
tia,
Ron
[ This message was edited by: ellisr63 on 2006-01-27 13:07 ]
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Surgeon
Sony Devotee
Joined: Jul 07, 2004
Posts: 84
From: USA
| Posted: 2006-01-27 14:36
Ron,
Check the build date on the back of your units. Early '04 units should have a flashable chip. Later builds, esp Nov '04 onwards, will probably require a chip replacement in order to be able to flash-reprogram them. Being able to flash the chip with CX-777ES firmware was what got me into developing my add-in rs232 mod in the first place.
After reprogramming a CX-985V unit with the CX-777ES's firmware, the unit will still report that it is a 985 (with additional 777-only setup menu features). That's because the firmware reads a model designation resistor that is factory set to the 985 position. To avoid having to change the resistor to the 777 position, a small 'patch' can be applied to the firmware which forces it to ignore the model resistor and into a full 777 state.
Even without the firmware 'patch' the unit will communicate and work just fine at this point via rs232 commands... with one exception... Unless it is in full 777 mode (either via a firmware 'patch' or actual resistor change) the rs232's direct-disc-play command won't function. All other commands work perfectly: on/off/play/stop/next-disc/previous-disc etc...
That's about all I can remember off hand without checking some of my notes... If you can get your units upgraded to the 777's firmware, I'll be happy to provide you with the rs232 mod info (which is basically a MAX3232 chip).
-Surgeon-
[ This message was edited by: Surgeon on 2006-01-27 14:43 ]
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jehill
Sony Senior Advisor
Joined: Mar 13, 2003
Posts: 13791
From: Sewell, NJ
| Posted: 2006-01-27 15:50
Thanks for your input, Surgeon!
-----------------
-John
Sony A/V System: KDL-55XBR8, BDP-S550, AVD-C700ES Super Audio CD/DVD Receiver, 4 SS-LA500ED surround speakers, 1 SS-LAC505ED center channel speaker and 1 SA-WD200 Active Subwoofer
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ellisr63
Sony Enthusiant
Joined: Jan 24, 2006
Posts: 26
From: Concord
| Posted: 2006-01-27 16:15
On 2006-01-27 14:36, Surgeon wrote:
Ron,
Check the build date on the back of your units. Early '04 units should have a flashable chip. Later builds, esp Nov '04 onwards, will probably require a chip replacement in order to be able to flash-reprogram them. Being able to flash the chip with CX-777ES firmware was what got me into developing my add-in rs232 mod in the first place.
After reprogramming a CX-985V unit with the CX-777ES's firmware, the unit will still report that it is a 985 (with additional 777-only setup menu features). That's because the firmware reads a model designation resistor that is factory set to the 985 position. To avoid having to change the resistor to the 777 position, a small 'patch' can be applied to the firmware which forces it to ignore the model resistor and into a full 777 state.
Even without the firmware 'patch' the unit will communicate and work just fine at this point via rs232 commands... with one exception... Unless it is in full 777 mode (either via a firmware 'patch' or actual resistor change) the rs232's direct-disc-play command won't function. All other commands work perfectly: on/off/play/stop/next-disc/previous-disc etc...
That's about all I can remember off hand without checking some of my notes... If you can get your units upgraded to the 777's firmware, I'll be happy to provide you with the rs232 mod info (which is basically a MAX3232 chip).
-Surgeon-
[ This message was edited by: Surgeon on 2006-01-27 14:43 ]
Surgeon,
I just checked and 1 was manufatured in March of 2004 and the other in Jan 2005. I will def need the full function as I need direct access. We are ordering the Max3232 chips today for 3 units (I will purchase 985 #3 after these 2 are modded). Where is this resistor? Maybe we could just change it out? My friend that is doing the mod lives 150 miles from my home so I'm trying to get everything ready for him..so it will go smoothly and turnaround will be faster. i don't like having 700 dvds laying in a pile for long.....too much chance of getting out of order  .
tia,
ron
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Surgeon
Sony Devotee
Joined: Jul 07, 2004
Posts: 84
From: USA
| Posted: 2006-01-27 16:51
On 2006-01-27 15:50, jehill wrote:
Thanks for your input, Surgeon!
Not a problem at all John! I've gleaned a lot of helpful information from all you Sony Pros on these forums over the years and try to drop by a couple times a week to see if I can return the 'bling'...
-Surgeon-
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Surgeon
Sony Devotee
Joined: Jul 07, 2004
Posts: 84
From: USA
| Posted: 2006-01-27 16:58
Ron,
Give me a day or so and I'll get you the exact resistor #'s, locations and some pics if I can find them...
-Surgeon-
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ellisr63
Sony Enthusiant
Joined: Jan 24, 2006
Posts: 26
From: Concord
| Posted: 2006-01-27 21:31
On 2006-01-27 16:58, Surgeon wrote:
Ron,
Give me a day or so and I'll get you the exact resistor #'s, locations and some pics if I can find them...
-Surgeon-
Surgeon,
Thanks
Ron
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Surgeon
Sony Devotee
Joined: Jul 07, 2004
Posts: 84
From: USA
| Posted: 2006-01-30 20:16
Ron,
Changing the Model Desigination Resistor on the CX-985V to the CX-777ES position involves removing the 3.3K resistor from it's position @ R153 and replacing it in the R166 position. This is a very small surface-mount resistor which is located in the lower-right-quarter of the Main Board's Bottom-Side. This is not an easy resistor to fool with, as it is quite small, so great care should be taken during the move.
Remember, this should only be done after you have upgraded your unit's firmware to the CX-777ES firmware...
The following picture shows the R153 resistor and where to move it: (click the image for a large animated view).
-Surgeon-
[ This message was edited by: Surgeon on 2006-01-30 20:32 ]
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ellisr63
Sony Enthusiant
Joined: Jan 24, 2006
Posts: 26
From: Concord
| Posted: 2006-01-30 22:27
Thanks Surgeon
Ron
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ellisr63
Sony Enthusiant
Joined: Jan 24, 2006
Posts: 26
From: Concord
| Posted: 2006-03-17 19:39
Got 2 up and running now.. The 3rd one is scheduled for this next week. Has anyone had any problems powering up the 985 after serial mod via serial? I am having difficulty powering up but can do everything else even power off via serial. I can't understand why it won't power up via serial only manually.
tia,
Ron
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Surgeon
Sony Devotee
Joined: Jul 07, 2004
Posts: 84
From: USA
| Posted: 2006-03-19 02:10
On 2006-03-17 19:39, ellisr63 wrote:
Got 2 up and running now.. The 3rd one is scheduled for this next week. Has anyone had any problems powering up the 985 after serial mod via serial? I am having difficulty powering up but can do everything else even power off via serial. I can't understand why it won't power up via serial only manually.
tia,
Ron
Ron,
I'm impressed! I assume your friend was able to replace the prom with an eeprom? Good job!
As far as the power-on serial cmd goes -- refer to the Sony technical document on the CX777 RS-232 CIS which reads:
・Host Controller sends POWER ON of POWER_SET command to DVD Player(400Mega) [using the] following transmission control.
STEP 1: After sending POWER ON of POWER_SET, Host controller waits for 100msec.
STEP 2: If there is no response from DVD Player after 100msec, Host Controller sends POWER ON again and waits [for a] response for 100msec.
STEP 3: Host Controller repeatedly sends POWER ON by following STEP 2 until Host Controller receives ACK from DVD Player(400 Mega).
Basically it means that you must send repeated Power-On sequences every 100msecs or so until you receive an ACK back from the unit. Most units usually reply and 'turn-on' on the 2nd sequence, but never on the first...
-Surgeon-
PS: I have one unit with a prom that I'd love to have upgraded to an eeprom. Any idea what your buddy might charge me if I were to send you/him the Main-Board? You have my email address...
[ This message was edited by: Surgeon on 2006-03-19 02:25 ]
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ellisr63
Sony Enthusiant
Joined: Jan 24, 2006
Posts: 26
From: Concord
| Posted: 2006-03-20 21:34
Surgeon,
I sent you an email about getting this done and also I found a place that is doing it. My friend had to use a robotic apparatis to do this job. Very tight job.
Ron
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ellisr63
Sony Enthusiant
Joined: Jan 24, 2006
Posts: 26
From: Concord
| Posted: 2006-03-31 02:28
Surgeon,
I sent you an email... We have troubleshooted the power on command but don't know why it still won't power on via serial.
tia,
Ron
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ellisr63
Sony Enthusiant
Joined: Jan 24, 2006
Posts: 26
From: Concord
| Posted: 2006-04-04 14:38
Thanks Surgeon,
Worksfine now
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Surgeon
Sony Devotee
Joined: Jul 07, 2004
Posts: 84
From: USA
| Posted: 2006-04-04 23:44
Ron,
You had to go through quite a bit, but I'm glad everything is working fine now...
Happy I could help...
-Surgeon-
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miah
Sony Fan
Joined: Apr 18, 2006
Posts: 1
From: Tahoe
 | Posted: 2006-04-18 16:44
Where can I find schematics to add rs232 port to my cx985 after flashing?
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ellisr63
Sony Enthusiant
Joined: Jan 24, 2006
Posts: 26
From: Concord
| Posted: 2006-04-21 23:13
On 2006-04-18 16:44, miah wrote:
Where can I find schematics to add rs232 port to my cx985 after flashing?
I have the electronic version of both manuals but they are over 10 meg each.
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stakh
Sony Fan
Joined: Mar 20, 2005
Posts: 9
From: Moscow
 | Posted: 2006-04-22 03:15
ellisr63
You can fill in Servise Manual DVP-CX777 on http://www.rapidshare.de?>
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jehill
Sony Senior Advisor
Joined: Mar 13, 2003
Posts: 13791
From: Sewell, NJ
| Posted: 2006-04-22 11:15
On 2006-04-21 23:13, ellisr63 wrote:
I have the electronic version of both manuals but they are over 10 meg each.
If you wish, you may send those manuals via yousendit.com. You upload a file to them and they send a link to the e-mail address that you specify. This is a very helpful service!
-----------------
-John
Sony A/V System: KDL-55XBR8, BDP-S550, AVD-C700ES Super Audio CD/DVD Receiver, 4 SS-LA500ED surround speakers, 1 SS-LAC505ED center channel speaker and 1 SA-WD200 Active Subwoofer
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miloc
Sony Fan
Joined: Jun 06, 2006
Posts: 4
From: New York City
 | Posted: 2006-06-10 14:01
Quit question: Is it possible to upgrade the firmware in a july/2003 985V? I'm getting the message "no audio data"
Thanks.
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pro-synch
Sony Fan
Joined: Sep 11, 2006
Posts: 1
From: Northern California
| Posted: 2006-09-11 17:47
On 2006-03-17 19:39, ellisr63 wrote:
Got 2 up and running now.. The 3rd one is scheduled for this next week. Has anyone had any problems powering up the 985 after serial mod via serial? I am having difficulty powering up but can do everything else even power off via serial. I can't understand why it won't power up via serial only manually.
tia,
Ron
Do you have the full procedure and parts list for doing this? I have a MArch 04 985V and am looking for Serial capability. Can you just purchase a CX777ES RS232C board and upgrade the firmware or do you have to do a bunch of other mods?
THX,
Drew
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thedishking
Sony Fan
Joined: Jun 20, 2005
Posts: 3
From: Minnesota
 | Posted: 2012-05-07 07:58
Hello Surgeon,
I am ready to upgrade the firmware on my 985, and would like to plan for the next step.
Could you please point me in the direction of the next step with adding the max232 chip etc.?
Thanks!!
Travis
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thedishking
Sony Fan
Joined: Jun 20, 2005
Posts: 3
From: Minnesota
| Posted: 2012-05-22 09:42
Hello, I have a few other questions on this topic.
I have successfully updated the firmware on one old 985, and thanks to Surgeon's memory fix, I now have audio/video, along with RS232 control.
Prior to the memory fix, I did not have any audio, and could not get to some of the menu functions via the remote control.
Question 1:
I am unable to see the image that Surgeon referenced, regarding the resistor change.
Is this truly necessary? I do have RS232 control of the 985, while I do have Rom Mismatch in the service menu. Should I care about this?
Question 2:
I swapped a board from a 777 to a 985.
While I did have RS232 control of the changer, it was acting really weird. What I mean by this is upon power up, the changer will spin the tray around and look to see what discs are installed.
The error I was experiencing was almost like a play button was stuck. It would try to play disc 1, then disc 2, etc. It would keep trying every slot, even though there was no discs in the tray.
I ended up putting the 985 board back in the unit, and it resolved the issue.
The only challenge to this is this 985 board is with the ROM, and not the eprom that is able to be upgraded.
Question 3:
I did purchase the eprom, and am ready to dive in swapping it out. Is there code on this chip, or do I need to program it prior to soldering into the circuit?
I am concerned that if I do swap it out, (and should my results be successful), I will be back to the "load every disc" even though no discs have been installed into the tray.
Thank you for any input you may provide!
Travis
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thedishking
Sony Fan
Joined: Jun 20, 2005
Posts: 3
From: Minnesota
| Posted: 2012-07-02 13:40
It is clear nobody is following these forums any longer. I now understand why.
These changers are obsolete in terms of today's technology, and are a complete waste of time.
I've had a few discs get scratched inside of these changers, and am officially done with these products.
Have a nice day!
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