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cplusplus
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Post subject: Re: Pioneer CLD-D770 (703) Wont Turn On Posted: 16 Jun 2022, 14:38 |
Hardcore fan |
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Joined: 13 Aug 2018, 03:18 Posts: 1520 Has thanked: 449 times Been thanked: 588 times
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Unplug it from wall and turn the voltage selector each way a few times to make sure it is making a good connection. I doubt this is the issue, but it is easy enough to try. Sounds like a bad cap somewhere to me. In the past I have repaired no standby by replacing a small capacitor on the primary side of power supply. I have repaired stuck in standby by replacing a small capacitor on board with display on it. d770 wrote: no matter what I try I cannot get the LD tray to come out - something binding or the belt is slipping (trying to manually turn the mechanism after removing the Video Board Belt slipping will not be an issue as long as you are turning the white plastic pulley. Just don't force anything. Make sure pickup is near spindle.
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sonicboom
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Post subject: Re: Pioneer CLD-D770 (703) Wont Turn On Posted: 19 Jun 2022, 15:08 |
Serious fan |
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Joined: 26 May 2014, 19:25 Posts: 236 Location: United States Has thanked: 65 times Been thanked: 92 times
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d770 wrote: The Power Supply Board is removed and I can see the Primary side Cap C14 does indeed get very Toasty! it sits far too close to a Hot Heatsink! Ive ordered a 200V 1uF 105 degree Electrolytic Cap and will hopefully get that on Monday and Install the same day to try....will post back the result. Any updates on the cap? I may need to do this soon on a new to me CLD-99.
_________________ Kevin LD-S2|CLD-D704|CLD-D406|DVL-V888|LX-900U|Crystalio II|Yamaha APD-1|Sony XBR55X810C
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d770
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Post subject: Re: Pioneer CLD-D770 (703) Wont Turn On Posted: 20 Jun 2022, 01:51 |
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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sonicboom wrote: d770 wrote: The Power Supply Board is removed and I can see the Primary side Cap C14 does indeed get very Toasty! it sits far too close to a Hot Heatsink! Ive ordered a 200V 1uF 105 degree Electrolytic Cap and will hopefully get that on Monday and Install the same day to try....will post back the result. Any updates on the cap? I may need to do this soon on a new to me CLD-99. Marked as out for Delivery - so should be trying this either today or tomorrow - will be posting back here the result soon for sure! Other options - there are a few 2nd hand boards on Ebay for a price!
_________________ 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: [CLD-D770] Won't Turn On Posted: 22 Jun 2022, 14:32 |
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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cplusplus wrote: That is the other board I mentioned to check caps on. C101, C104, C105 and anything else you see. I would do all of this with player unplugged from wall because you will need to measure ESR/capacitance rather than voltage.
A bad Mode Control IC would be so rare that you would have to rule out everything else first. C104 ! 10uF 16Volt Thankyou C++! Luckily I had a spare cap. Was heading for bed but saw your post ...thought lets test and see ! Was thinking originally if I could see +5V where I should on that Chip then Caps maybe not the issue - but it was indeed - thanks again ! The Loading Belt is now slipping - will have to get a new one..then to see if we have a Spindle Motor Issue - but thats for another thread and another day! Cheers
_________________ CLD-D770 OK CLD-2850 FLD,R201 CLD-D780 MHolder, PSU C12 CLD-2290 Digital Prob CLD-2590K Lots issues
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sonicboom
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Post subject: Re: [CLD-D770] Won't Turn On Posted: 24 Jun 2022, 15:28 |
Serious fan |
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Joined: 26 May 2014, 19:25 Posts: 236 Location: United States Has thanked: 65 times Been thanked: 92 times
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cplusplus wrote: That is the other board I mentioned to check caps on. C101, C104, C105 and anything else you see. I would do all of this with player unplugged from wall because you will need to measure ESR/capacitance rather than voltage.
A bad Mode Control IC would be so rare that you would have to rule out everything else first. So these caps are located on the front panel assembly right? What is the actual issue? They have gone bad and now are shorting out power getting to the IC to begin the start up sequence? I just want to understand the issue more than just replacing parts. My 99 will show the red standby light then it will fade out when I push the power button. The standby light will always come back after I pull power then plug it back in. PS board looks ok. Thx.
_________________ Kevin LD-S2|CLD-D704|CLD-D406|DVL-V888|LX-900U|Crystalio II|Yamaha APD-1|Sony XBR55X810C
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sonicboom
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Post subject: Re: [CLD-D770] Won't Turn On Posted: 25 Jun 2022, 23:14 |
Serious fan |
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Joined: 26 May 2014, 19:25 Posts: 236 Location: United States Has thanked: 65 times Been thanked: 92 times
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D770 & C++ thanks you two! I learned that a player not powering on is not always the actual power supply going bad... cplusplus wrote: The other two caps I mentioned are also on this "always on" +5V supply. One is in the Mode Control IC's watchdog circuit and one is for the remote receiver (the remote receiver has to always be on so the player can be powered on via remote). So, then is it possible a player could power on via remote but not via the front panel power switch? Also, do either of you have the values for all those caps mentioned? I know you mentioned C104. The SM doesn't state the values, only the part number. Not all of them are coming up in searches. It would be nice to have them ready when I open the thing up again. Thanks again!
_________________ Kevin LD-S2|CLD-D704|CLD-D406|DVL-V888|LX-900U|Crystalio II|Yamaha APD-1|Sony XBR55X810C
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