It is currently 06 Aug 2020, 20:42




 Page 2 of 2 [ 30 posts ]  Go to page Previous  1, 2
Author Message
 Post subject: Re: Yamaha DDP-1 No display need Service manual anyone
PostPosted: 22 Jul 2020, 22:22 
True fan
True fan
User avatar

Joined: 27 Jul 2014, 20:59
Posts: 277
Location: North London
Has thanked: 70 times
Been thanked: 84 times
I suppose clock/oscillation failure could cause this kind of problem. Its difficult to try and figure out how this chip is implemented without a service manual. Pin 9 and 10 are both inputs. Looking at section 14 (page 223 of pdf) of the spec sheet, these can be wired up to two external clocks with reverse phases. Or have one external clock connected to pin 10 (EXTAL). I think section 14.3 (page 263) is showing what should be on pins 23, 24?

Pin 1 is the input clock for the 16 bit free running timer whereas pins 2 and 3 are the outputs. Pins 17 and 20 are the inputs for the 8 bit timer clock. Pins 19 and 21 are the outputs. Could be worth checking these points for oscillation?

What pins do the XL5 crystal correlate to when you test continuity? It looks like a 2 pin crsytal. So, I'm assuming its +5v on one pin and oscillation with voltage on the other. Are you getting voltage at XL5? You could always take it out and power it externally and test with scope for oscillation. Have you checked the load capacictors?
Offline
 Profile  
 
 Post subject: Re: Yamaha DDP-1 No display need Service manual anyone
PostPosted: 23 Jul 2020, 04:18 
Genuinely interested
Genuinely interested
User avatar

Joined: 19 Aug 2019, 07:23
Posts: 40
Location: Australia
Has thanked: 17 times
Been thanked: 5 times
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
XL5-crop-under.jpg [ 440.63 KiB | Viewed 106 times ]

Attachment:
crystall-top-sized.jpg
crystall-top-sized.jpg [ 116.76 KiB | Viewed 106 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
crystal-example-red.jpg [ 145.6 KiB | Viewed 106 times ]
Offline
 Profile  
 
 Post subject: Re: Yamaha DDP-1 No display need Service manual anyone
PostPosted: 23 Jul 2020, 10:02 
True fan
True fan
User avatar

Joined: 27 Jul 2014, 20:59
Posts: 277
Location: North London
Has thanked: 70 times
Been thanked: 84 times
Okay so it looks like XL5 is a 3 pin ceramic resonator. I believe these have capacitors built in and may not need external components to work. Im sure its voltage on one pin ground to the middle pin and oscillation from the third pin. I would suggest starting low and slowly ramping up voltage until you see it oscillate. Try it out of circuit.

Only having voltage on Pin 10 (Extal) can make sense because it could be the only clock input on the chip. The voltage might be coming through but the resonator could be damaged and not providing the oscillation. Im assuming that '10.0T' is 10Mhz. If you have a frequency generator you could try to pump 10Mhz into the chip externally.

One thing that stands out to me is the picture of the board. Is that damage to the trace near XL5? or is it just a bit of dust?
Offline
 Profile  
 
 Post subject: Re: Yamaha DDP-1 No display need Service manual anyone
PostPosted: 23 Jul 2020, 12:56 
Genuinely interested
Genuinely interested
User avatar

Joined: 19 Aug 2019, 07:23
Posts: 40
Location: Australia
Has thanked: 17 times
Been thanked: 5 times
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
Ceramic-Res-sized.jpg [ 150.03 KiB | Viewed 89 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.
Offline
 Profile  
 
 Post subject: Re: Yamaha DDP-1 No display need Service manual anyone
PostPosted: 23 Jul 2020, 13:35 
Genuinely interested
Genuinely interested
User avatar

Joined: 19 Aug 2019, 07:23
Posts: 40
Location: Australia
Has thanked: 17 times
Been thanked: 5 times
The Brand and manufacturer..CERALOCK by Murata..I think its part number CST10.0MTW! The datasheet for the range in question https://www.rf-microwave.com/resources/products_attachments/5a4386d20b5cc.pdf

Possible source of replacement:
https://www.rf-microwave.com/en/murata/cst10-0mtw/10-mhz-ceramic-resonator/rce-10m/ Wants a minimum of $50 order :o
https://www.lazada.com.my/products/murata-cst100mtw-resonator-crystal-for-micro-controllers-10mhz-i968806300.html Only delivery to Indonesia! Might have to keep looking!

Research says this particular Crystal became obsolete in 2012... perhaps this is the replacment?!

https://www.murata.com/en-us/api/pdfdownloadapi?cate=cgsubResonators&partno=CSTLS10M0G53-A0

Difference I can find between original Resonator CST10.0MTW and CSTLS10M0G53 :
Internal Load Capacitance is 30pF for CST and 15pF for CSTL Resonator...would that matter?!

Looking at the Microcontroller's PDF Datasheet..it specifies Load Capacitance at 15-22pF for an external crystal circuit to be connected... so assuming..CSTLS10M0G53 should be ok.!?

for ref: Another ceramic resonator from Murata has a 47pF Load Capacitance - CSTLS10M0G56
Offline
 Profile  
 
 Post subject: Re: Yamaha DDP-1 No display need Service manual anyone
PostPosted: 25 Jul 2020, 11:30 
True fan
True fan
User avatar

Joined: 27 Jul 2014, 20:59
Posts: 277
Location: North London
Has thanked: 70 times
Been thanked: 84 times
Try it and see. As far as my research goes XL5 should resonate with voltage applied so unless we are missing something, that very well could be the cause of the fault.
Offline
 Profile  
 
 Post subject: Re: Yamaha DDP-1 No display need Service manual anyone
PostPosted: 25 Jul 2020, 14:37 
Genuinely interested
Genuinely interested
User avatar

Joined: 19 Aug 2019, 07:23
Posts: 40
Location: Australia
Has thanked: 17 times
Been thanked: 5 times
Yes think it could be the fault as well...no clock running and Display does not go past its power start-up state.

Ordered a CSTLS10M0G53 3 pin 10mhz crystal from the UK...given the slow delivery at the moment...wont get it until mid August if lucky!....so will have to be patient! Certainly nothing to lose in trying to swap it out.
Offline
 Profile  
 
 Post subject: Re: Yamaha DDP-1 No display need Service manual anyone
PostPosted: 25 Jul 2020, 15:00 
Honest fan
Honest fan
User avatar

Joined: 13 Jul 2012, 10:29
Posts: 79
Location: Japan
Has thanked: 12 times
Been thanked: 21 times
FWIW, the power LED on the Pioneer RFD-1 demodulator I got used for like $30 5 years ago never lit up, but the unit itself always performed flawlessly.
Offline
 Profile  
 
 Post subject: Re: Yamaha DDP-1 No display need Service manual anyone
PostPosted: 25 Jul 2020, 18:20 
Advanced fan
Advanced fan
User avatar

Joined: 28 Jun 2014, 05:59
Posts: 583
Location: San Francisco, CA USA
Has thanked: 65 times
Been thanked: 124 times
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. :|
Offline
 Profile  
 
 Post subject: Re: Yamaha DDP-1 No display need Service manual anyone
PostPosted: 26 Jul 2020, 09:52 
Genuinely interested
Genuinely interested
User avatar

Joined: 19 Aug 2019, 07:23
Posts: 40
Location: Australia
Has thanked: 17 times
Been thanked: 5 times
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.
Offline
 Profile  
 
Display posts from previous:  Sort by  
 Page 2 of 2 [ 30 posts ]  Go to page Previous  1, 2


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: