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d770
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Post subject: Re: Yamaha DDP-1 No display need Service manual anyone Posted: 23 Jul 2020, 04:18 |
Serious fan |
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Joined: 19 Aug 2019, 07:23 Posts: 175 Location: Australia Has thanked: 122 times Been thanked: 42 times
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Crystal XL5 has 3 pins!...+2.2 volts to 'gnd' seen on pin 10..nothing on Pin 9!...no oscillation on any pin. I assume the Crystal operates upto 5Volts.....I also assume that supply voltage can be on either pin 1 or 3 and the Crystal will still run!?..question.. which Microcontroller Pin (pin 9 or 10) should be the supply.?! No oscillation seen on the other pins queried...nor Voltage. See Pic of underside of PCB showing XL5 crystal 3 pin connection. Middle Pin is GND. Other two pins directly goto Pin 9 and Pin 10 ...cant see any other connection related to XL5...no capacitors! (see pic)..perhaps not needed in this design?! Attachment:
XL5-crop-under.jpg [ 440.63 KiB | Viewed 3672 times ]
Attachment:
crystall-top-sized.jpg [ 116.76 KiB | Viewed 3672 times ]
Will remove XL5 tomorrow ..will look to try and make it oscillate..never tried to drive a crystal myself before...can I just give it some voltage and ground.?! Stamped on the Crystal is '10.0T' and underneath that lookslike an 'm' not sure if this means 10mhz or ? Pic Example of what XL5 Lookslike Attachment:
crystal-example-red.jpg [ 145.6 KiB | Viewed 3672 times ]
_________________ CLD-D770 OK CLD-2850 FLD,R201 CLD-D780 MHolder, PSU C12 CLD-2290 Digital Prob CLD-2590K Lots issues
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d770
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Post subject: Re: Yamaha DDP-1 No display need Service manual anyone Posted: 23 Jul 2020, 12:56 |
Serious fan |
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Joined: 19 Aug 2019, 07:23 Posts: 175 Location: Australia Has thanked: 122 times Been thanked: 42 times
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Whipped the Crystal out....ramped up slow with the power supply...nothing no oscillations up to 5volts....no output...only signal Im seeing on the scope is a little low frequency ripple from the power supply DC voltage. Don't have a signal generator unfortunately. Wish I had another crystal just to prove my test setup works. Hard to go any further..unless I can find a replacement crystal perhaps. A close up of the actual crystal: Attachment:
Ceramic-Res-sized.jpg [ 150.03 KiB | Viewed 3655 times ]
Dust in Photo .just dust on the PCB tracks...early photo before it was cleaned.
Last edited by d770 on 23 Jul 2020, 15:18, edited 1 time in total.
_________________ CLD-D770 OK CLD-2850 FLD,R201 CLD-D780 MHolder, PSU C12 CLD-2290 Digital Prob CLD-2590K Lots issues
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ldfan
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Post subject: Re: Yamaha DDP-1 No display need Service manual anyone Posted: 25 Jul 2020, 18:20 |
Hardcore fan |
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Joined: 28 Jun 2014, 05:59 Posts: 1463 Location: San Francisco, CA USA Has thanked: 427 times Been thanked: 537 times
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d770 wrote: Yes think it could be the fault as well...no clock running and Display does not go past its power start-up state. Looking forward to seeing if this is the solution. Having a weird issue with my SDP-E800 and starting to look at one or more oscillators that might be an issue or not.
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d770
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Post subject: Re: Yamaha DDP-1 No display need Service manual anyone Posted: 26 Jul 2020, 09:52 |
Serious fan |
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Joined: 19 Aug 2019, 07:23 Posts: 175 Location: Australia Has thanked: 122 times Been thanked: 42 times
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ldfan wrote: Looking forward to seeing if this is the solution. Having a weird issue with my SDP-E800 and starting to look at one or more oscillators that might be an issue or not. Will post the result for sure!...Last couple of fixes needed in my older late 90's audio gear (amplifier and av receiver) have both been Microcontroller related..one fault was one input stopped working...the other was complete internal failure...certainly age is a factor.
_________________ CLD-D770 OK CLD-2850 FLD,R201 CLD-D780 MHolder, PSU C12 CLD-2290 Digital Prob CLD-2590K Lots issues
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ldfan
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Post subject: Re: Yamaha DDP-1 No display need Service manual anyone Posted: 22 Mar 2021, 21:08 |
Hardcore fan |
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Joined: 28 Jun 2014, 05:59 Posts: 1463 Location: San Francisco, CA USA Has thanked: 427 times Been thanked: 537 times
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Good to know you got it working regardless what the solution was. I just replaced a ceramic oscillator in my Sony SDP-E800 just over a week ago and still testing for a glitch. It usually has an issue cutting out sound about every 20 days or so on the six channel output only. I’ll update my posting in about 3 weeks if it keeps going fine.
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ldstl
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Post subject: Re: Yamaha DDP-1 No display need Service manual anyone Posted: 06 Oct 2023, 05:16 |
Honest fan |
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Joined: 23 Jan 2018, 05:28 Posts: 66 Location: United States Has thanked: 10 times Been thanked: 25 times
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Reviving a dead thread, but for good reason. I recently got a Yamaha DDP-1 and it exhibited similar symptoms to OPs. As indicated in the post above, I ordered the micro processor from utsource.com but it didn't make a difference! Read below for the actual fix. BTW, the chip was $5 but shipping was $25, oh well. When I pushed the power button, the display would initially light up YAMAHA DDP-1 etc. but it would not load the second part which would be to indicate no RF signal. I've had a couple other DDP-1 failures before this one and received some good advice from someone over at LDF to check the voltage regulators. IC22 and IC23 were both bad. These are 7805A (similar part https://www.digikey.com/en/products/detail/stmicroelectronics/L7805ACP/1038231) Each time I repaired a DDP-1, it has always been a 7805A voltage regulator. One of the symptoms was the machine would fire up fine but not process an AC-3 signal. I attached a couple images below to illustrate where these are. IC23 is difficult to remove - you need to use a pair of pliers to first remove the set screw, then you can un-solder the part. Board (excuse the dirt, waited to clean it until I knew I could fix) Old voltage regulators
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