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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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pioneer laser disc player inoperative
pioneer CLD-D702
the front panel display works.the tray drawer opens and closes,loads a cd/laserdisc but the disc never spins. w/o any disc i can clearly see the laser assy hunting,trying to focus and a dim laser light. acccess to the power supply and boards are difficult so my question is where can i get advice/tute needed to narrow down the steps needed to locate the source of my problem. even test points to check the power supply board would be helpfull barry a retired tech. |
#2
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pioneer laser disc player inoperative
"71chevyvan" wrote in message ... pioneer CLD-D702 the front panel display works.the tray drawer opens and closes,loads a cd/laserdisc but the disc never spins. w/o any disc i can clearly see the laser assy hunting,trying to focus and a dim laser light. acccess to the power supply and boards are difficult so my question is where can i get advice/tute needed to narrow down the steps needed to locate the source of my problem. even test points to check the power supply board would be helpfull barry a retired tech. I would first check the spindle motor. Try giving the disk a spin manually and see if it runs. David |
#3
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pioneer laser disc player inoperative
I don't remember if this is the same model, but one of the early players
with a laser diode had a problem with the switch that determined whether an LV or CD was inserted. If you played a CD, the unit would then refuse to play an LV, until you took off the cover and manually reset the mechanism (flipped the tray). |
#4
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pioneer laser disc player inoperative
71chevyvan wrote:
pioneer CLD-D702 the front panel display works.the tray drawer opens and closes,loads a cd/laserdisc but the disc never spins. w/o any disc i can clearly see the laser assy hunting,trying to focus and a dim laser light. acccess to the power supply and boards are difficult so my question is where can i get advice/tute needed to narrow down the steps needed to locate the source of my problem. even test points to check the power supply board would be helpfull barry a retired tech. Try cleaning the laser lens. Many (most?) CD/DVD players won't spin up unless they get an initial reflection from the disk. jak |
#5
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pioneer laser disc player inoperative
jakdedert wrote: 71chevyvan wrote: pioneer CLD-D702 the front panel display works.the tray drawer opens and closes,loads a cd/laserdisc but the disc never spins. w/o any disc i can clearly see the laser assy hunting,trying to focus and a dim laser light. acccess to the power supply and boards are difficult so my question is where can i get advice/tute needed to narrow down the steps needed to locate the source of my problem. even test points to check the power supply board would be helpfull barry a retired tech. Try cleaning the laser lens. Many (most?) CD/DVD players won't spin up unless they get an initial reflection from the disk. jak tried cleaning with no results. however the laser does glow while searching for focus etc. |
#6
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pioneer laser disc player inoperative
I would first check the spindle motor. Try giving the disk a spin manually and see if it runs. David nope.tried that when i tested to see if motor froze up. |
#7
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pioneer laser disc player inoperative
William Sommerwerck wrote: I don't remember if this is the same model, but one of the early players with a laser diode had a problem with the switch that determined whether an LV or CD was inserted. If you played a CD, the unit would then refuse to play an LV, until you took off the cover and manually reset the mechanism (flipped the tray). good thought. i believe i am on side #1. w/a laser disc installed pressing button for side#2 lights the indicator but nothing happens mechanically. both lights remain lit. i wonder which screws i need to remove to seperate the mechanical assembly from the top of the boards. thats because there's no removeable bottom plate under the boards for me to take voltage readings. |
#8
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pioneer laser disc player inoperative
I don't remember if this is the same model, but one of the early players
with a laser diode had a problem with the switch that determined whether an LV or CD was inserted. If you played a CD, the unit would then refuse to play an LV, until you took off the cover and manually reset the mechanism (flipped the tray). good thought. i believe i am on side #1. w/a laser disc installed pressing button for side#2 lights the indicator but nothing happens mechanically. both lights remain lit. i wonder which screws i need to remove to seperate the mechanical assembly from the top of the boards. thats because there's no removeable bottom plate under the boards for me to take voltage readings. For what I suggest, you need only remove the top cover. |
#9
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pioneer laser disc player inoperative
71chevyvan writes:
jakdedert wrote: 71chevyvan wrote: pioneer CLD-D702 the front panel display works.the tray drawer opens and closes,loads a cd/laserdisc but the disc never spins. w/o any disc i can clearly see the laser assy hunting,trying to focus and a dim laser light. acccess to the power supply and boards are difficult so my question is where can i get advice/tute needed to narrow down the steps needed to locate the source of my problem. even test points to check the power supply board would be helpfull barry a retired tech. Try cleaning the laser lens. Many (most?) CD/DVD players won't spin up unless they get an initial reflection from the disk. jak tried cleaning with no results. however the laser does glow while searching for focus etc. Does it actually achieve focus lock? I.e., the lens should pop up once and stay fixed, not repeatedly move up and down trying to find focus. -- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/ +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html Important: Anything sent to the email address in the message header above is ignored unless my full name AND either lasers or electronics is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
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