The guy that brought you the unit is, with street accent, "alriiiight." He likely knew what the issue was and in turn he wanted to make it so the least amount of your time will be required, hence the cover being off. That's my kind of people. Rock on. Awesome videos as always, by the way. Keep the mojo.
Thanks Dave.. I wonder what My Sound effects collection would be worth. I have well over 100 CD's some of which have never been opened. Some are sets of several Disk's. These were protected from the Fire as they were in another room.
Sometimes we get lucky. I like short repairs because i make money. I don't make money on marithon repairs that take hours as i basically charge a flat rate for this stuff. That's the only way to get the work. That rate basically covers about 1 hour. What i would be paid for 1 hour at my day job before taxes. Keep on mind that a 60 minute video probably took 3 or 4 hours to fix start to finish. 30 minute videos are usually a couple hours of my time. Quick ones are always welcome.
After your fight with the Tascam, an easy repair makes a welcome change. These early CD players are still working, later models seemed to be prone to early failures of the laser, which are now getting hard to find. Denon players i have found to be very prone to a short laser life.
Hi Dave, what do you say about the following symptoms: a CD player that played some CDs but not others. The CDs that did not play were not scratched, on contrary most of them were like new. If I were able to skip to the second track, it would play them to the end. So, something with seeking, or reading TOC? Then after sitting on a shelf for a year, it does not play any CD. It is a 1991 Technics model that I bought for $15 on garage sale, but I don't want to trash it. Anything simple that someone without electronic tech education can do? Repair is expensive around here, $80 only to look at it.
Dave, I like the Tascam line. I've had a cassette R/P from them for several years. Never really liked the rather small knobs, I'm like you, rather fat fingers and they don't like small knobs. mine Tascam is like other at this age, speed control is not doing well.
I wonder if cleaning the lens on the laser would help? I've done some of my CD units, car and home, with Q-tip and 91% isopropyl alcohol and it seemed to "fix" some reading issues.
My Pioneer DVL-91 Laserdisc player just wouldn't open the other day when I powered it on. It doesn't make a sound when I press the eject button, just displays "open" but does nothing. It has been hooked up and playing fine for the last 4 years straight. Any ideas on where I should start to diagnose it?
It smells like shit, so you know if you are inhaling it. My work shop is well ventilated. If solder smoke and all the other chemicals I was exposed to didn't kill me in the 20 years i did this 9 hours a day 5 days a week i doubt I have to worry now. Unless it's freezing out there is generally a big door open and fans running. I'm not too concerned about the little bit if solder smoke that might waft by. I don't intentionally sniff it.
I had two of those old Technics/Panasonic CD players and with CD-R is a hit or miss: one would read them, the other one would struggle to read TOC. But both played perfectly stamped CD's . Sold them both with no remorse, they were just mid 80's entry level and not particularly nice looking to my eye.
All the old ones made before cdr are hit and miss. Even players that came out the year that dvdr was released didn't fully support cdr and it was several years before cdrw support was added due to the complexity of cdrw. That works on phase change of the returning light as opposed to off and on of a regular disk. (more accurately in focus or out of focus which resulted in on off pulses of the data train.
@@12voltvids AFAIK stamped discs use the properties of coherent light: lights reflected by the pits has a phase shift of 180 deg and cancel out the light reflected by the surrounding areas causing a decrease in light hitting the photodiodes; CD-R instead has "holes" in place of the pits and light is not reflected back. Theoretically it was designed to be fully back-compatible with any old CD player (and all my 80's CD players reads them with no problems) but in same cases they are not compatible - as that Panasonic CD player or some DVD players. CD-RW is a different story and needs an increase in signal gain to be properly read, so the player needs to be certified with CD-RW to be able to read them. If any old players read CD-RW is just a lucky coincidence, they are not expected to read them.
From what I remember when I took the CD course back in the early 80s the way the stamp this works is the laser is focused on and it doesn't matter whether it focuses on the pits or on the lands but the focus is very precise and the difference in distance between the pit and the land is enough to cause a focus change which in turn causes the light level to dip which results in a level shift which then is turned into a one or a zero by the comparator. CDR works similarly where the dye is burned you get a reflection and where the dye is not burned the light is partially blocked which again results in the level shift. Different types of dye have different properties depending on the wavelength from the laser. Not every CD laser was the same wavelength they were all close but individual manufacturers use a slightly different wavelength. Cdrw on the other hand used a physical change to the metal recording layer due to how the recording layer was heated during the burning process this caused phase change on the returning light as opposed to a level change and required pick up specifically designed to detect the phase change. One thing that is interesting is that the early DVD players that use the single wavelength red laser for DVDs could not read any CDR media because the light was not blocked by the dye there however these early DVD players could play audio CDs on stamped discs and they could also play cdrw with no problem because the laser pickups could detect that phase shift. The shorter wavelength of the red laser as opposed to the infrared could detect the slight changes in the phase of the light being returned. I still find optical media fascinating. Everything from the old LaserDisc right through the Blu-ray I'm just completely fascinated by recording audio and video or data using a laser. Everything else is pretty boring by comparison magnetic tape and heads boring. Recording information with a laser that's cool. One of my favorite video cameras that I own is the little HD camera that records onto DVD or DVD RW or + RW for that matter discs in the AVCHD format. I can pop a disk in that camera make a recording take that disc out and put it in my Blu-ray player and have a full HD disc. Now that's cool that's even cooler than writing data to memory chips.
Took tenacity with the Tascam! Great it's fixed. Nice CD player repair, too.
The guy that brought you the unit is, with street accent, "alriiiight." He likely knew what the issue was and in turn he wanted to make it so the least amount of your time will be required, hence the cover being off. That's my kind of people. Rock on. Awesome videos as always, by the way. Keep the mojo.
More like too lazy to put them in.
@@12voltvidshahaha ok :)
Thanks Dave..
I wonder what My Sound effects collection would be worth. I have well over 100 CD's some of which have never been opened. Some are sets of several Disk's. These were protected from the Fire as they were in another room.
Good short video, which is what i was looking for
Sometimes we get lucky. I like short repairs because i make money. I don't make money on marithon repairs that take hours as i basically charge a flat rate for this stuff. That's the only way to get the work. That rate basically covers about 1 hour. What i would be paid for 1 hour at my day job before taxes. Keep on mind that a 60 minute video probably took 3 or 4 hours to fix start to finish. 30 minute videos are usually a couple hours of my time. Quick ones are always welcome.
@@12voltvidshopefully some of these videos get you so rolling in money it comes out your nose😂
Excellent. Both are fixed!
After your fight with the Tascam, an easy repair makes a welcome change.
These early CD players are still working, later models seemed to be prone to
early failures of the laser, which are now getting hard to find.
Denon players i have found to be very prone to a short laser life.
Hi Dave, what do you say about the following symptoms: a CD player that played some CDs but not others. The CDs that did not play were not scratched, on contrary most of them were like new. If I were able to skip to the second track, it would play them to the end. So, something with seeking, or reading TOC? Then after sitting on a shelf for a year, it does not play any CD. It is a 1991 Technics model that I bought for $15 on garage sale, but I don't want to trash it. Anything simple that someone without electronic tech education can do? Repair is expensive around here, $80 only to look at it.
Dave, I like the Tascam line. I've had a cassette R/P from them for several years. Never really liked the rather small knobs, I'm like you, rather fat fingers and they don't like small knobs. mine Tascam is like other at this age, speed control is not doing well.
that was a very fast fix
I wonder if cleaning the lens on the laser would help? I've done some of my CD units, car and home, with Q-tip and 91% isopropyl alcohol and it seemed to "fix" some reading issues.
I wouldn't use alcohol on lens. Most have a coating on them that alcohol can damage. Wipe it with a dry q-tip
@@12voltvids Thanks!
@@12voltvids What about the slightest amount of window cleaner? Is that also dangerous?
My Pioneer DVL-91 Laserdisc player just wouldn't open the other day when I powered it on. It doesn't make a sound when I press the eject button, just displays "open" but does nothing. It has been hooked up and playing fine for the last 4 years straight. Any ideas on where I should start to diagnose it?
The drawer belt?
send it in with Canada moneys
What amp and speakers are you using in your workshop to test with? Sounds good.
I miss the kitty.
Kitty is sitting with me watching TV right now.
@@12voltvids I keep expecting the meowing kitty every time I see the internet now.
Do you use a fume extractor while soldering?
No why should I? A little rosin smoke never hurt anyone.
@@12voltvids Oh, rosin, yeah, I heard it's not harmful and smells good.
It smells like shit, so you know if you are inhaling it. My work shop is well ventilated. If solder smoke and all the other chemicals I was exposed to didn't kill me in the 20 years i did this 9 hours a day 5 days a week i doubt I have to worry now. Unless it's freezing out there is generally a big door open and fans running. I'm not too concerned about the little bit if solder smoke that might waft by. I don't intentionally sniff it.
Very well done whats the name of the first track on the cd?
Which CD?
@@12voltvids the very first one that u tried to play
I had two of those old Technics/Panasonic CD players and with CD-R is a hit or miss: one would read them, the other one would struggle to read TOC. But both played perfectly stamped CD's . Sold them both with no remorse, they were just mid 80's entry level and not particularly nice looking to my eye.
All the old ones made before cdr are hit and miss. Even players that came out the year that dvdr was released didn't fully support cdr and it was several years before cdrw support was added due to the complexity of cdrw. That works on phase change of the returning light as opposed to off and on of a regular disk. (more accurately in focus or out of focus which resulted in on off pulses of the data train.
@@12voltvids AFAIK stamped discs use the properties of coherent light: lights reflected by the pits has a phase shift of 180 deg and cancel out the light reflected by the surrounding areas causing a decrease in light hitting the photodiodes; CD-R instead has "holes" in place of the pits and light is not reflected back. Theoretically it was designed to be fully back-compatible with any old CD player (and all my 80's CD players reads them with no problems) but in same cases they are not compatible - as that Panasonic CD player or some DVD players. CD-RW is a different story and needs an increase in signal gain to be properly read, so the player needs to be certified with CD-RW to be able to read them. If any old players read CD-RW is just a lucky coincidence, they are not expected to read them.
From what I remember when I took the CD course back in the early 80s the way the stamp this works is the laser is focused on and it doesn't matter whether it focuses on the pits or on the lands but the focus is very precise and the difference in distance between the pit and the land is enough to cause a focus change which in turn causes the light level to dip which results in a level shift which then is turned into a one or a zero by the comparator. CDR works similarly where the dye is burned you get a reflection and where the dye is not burned the light is partially blocked which again results in the level shift. Different types of dye have different properties depending on the wavelength from the laser. Not every CD laser was the same wavelength they were all close but individual manufacturers use a slightly different wavelength. Cdrw on the other hand used a physical change to the metal recording layer due to how the recording layer was heated during the burning process this caused phase change on the returning light as opposed to a level change and required pick up specifically designed to detect the phase change. One thing that is interesting is that the early DVD players that use the single wavelength red laser for DVDs could not read any CDR media because the light was not blocked by the dye there however these early DVD players could play audio CDs on stamped discs and they could also play cdrw with no problem because the laser pickups could detect that phase shift. The shorter wavelength of the red laser as opposed to the infrared could detect the slight changes in the phase of the light being returned. I still find optical media fascinating. Everything from the old LaserDisc right through the Blu-ray I'm just completely fascinated by recording audio and video or data using a laser. Everything else is pretty boring by comparison magnetic tape and heads boring. Recording information with a laser that's cool. One of my favorite video cameras that I own is the little HD camera that records onto DVD or DVD RW or + RW for that matter discs in the AVCHD format. I can pop a disk in that camera make a recording take that disc out and put it in my Blu-ray player and have a full HD disc. Now that's cool that's even cooler than writing data to memory chips.
Surprisingly empty inside for such an old unit. If it weren't for the non-switching power supply, I'd think it was from the 2000s.
They did have portable units in this era.
Same CD-player as around three months ago..?
I have seen similar models.