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Examples of dvd failure overhauls
Example 1: when a new section dvd-8612 is put in a disk, it can't be played
Put it down. The disc exits in a few seconds
Check: this is a human dvd machine
Open the hood. Release the disk
Snippets, loading circuits, disk stowage and loaded, but laser head assembly none
Any follow-up action, and the disc stays. Because of the laser head component with the main
None of the axle motors were moving, and there was a preliminary suspicion that there was a problem with the power supply. Measuring power supply voltage
Normal (see table 1 for normal working voltage for power outlets xp303)
I'm not sure what i'm talking about
Main axis motors, etc., are controlled by work switches, which are carried by loaders
Controlled by connected mechanical poles, i. E., attached poles when loaded in the disk snout
Connecting the work switch to the main axle motors and laser header circuits for normal operation
(see figure 1). Opens the top plate, online measurements are put on the switch, and it's closed
It's got about 90 kl-- it's got no water ethanol
The closed block value is on. Reactivate the retrofit. The retrofit
Strong
5. 6
Five
Serial number
Pressure {v)
5. 6
Example 2: 1 new section dvd-8612, fully visible when activated
Often, but not on disks
Check: because this smoky dvd is loaded in the hangar
Infrared launch receiver control on the warehouse door
It's not gonna affect the normal operation of loading circuits
(see figure 1):
Unload the screws on the top plate, open the panel, install the measuring plate
Infrared control tubes (i. E., infrared a tubes on the plate) have infinity reverse resistance values
Large, indicating that it is no longer valid (the normal open road survey should be 15 okn and infinity inverse)
When the control has failed, due to the loss of the detection signal
The loader was unable to obtain the working voltage, resulting in the loader not working. It's for discs
The process of entry is driven by the loader's gear-to-axis
Senders (see figure 2), loaders and associated axes not working, rendering discs unmanageable
Kilo. The machine returned to normal after the replacement of this infrared tube。
Example 3: a new section, dvd 1 8612, appears in service
The cardboard phenomenon。
Repair: open the hood and observe that the disk is in a semi-departure at this time. Status
State. When the machine goes through the power, loads the motor and turns, and makes the sound of an arctic sound
Wu jinsheng
The position remained unchanged and the disc was caught at the inside door. Lose the power, unload the plate
Fixing screws, removing signal and data control lines (i. E., two flat lines) and removing the plate. Unload
Top panel of the f disk, manually remove the disk, then restore the diskette and re-install it. Okay
Pumpboard, reload the plate back in the machine
The man was still not loaded and again stuck. Keep an eye on the space plate
The process of loading and loading the disk shows that the controls were not in place when the disc entered
Operation is in place and although the loader is working, the transmission component is no longer functional. The original
As a result, there was a problem with the gearing component。
Unload the hood on the left side of the plate, and observe the positions of the gears
The transmission gear has been found to be at the wrong end of the wheel, resulting in a failure to drive control gear
All right. The normal position of the gearing gear group (out of silos) is shown in figure 3。
Reset the gears and manually simulate the move of the disc into and out of the warehouse
See if it works properly. Specific approach: tilt driver with hand-rotation loader teeth
Wheel, clockwise rotates the loader 's gear exits; counterclockwise rotates
Driver to load power
The gear is for discs
Enter. It's a analog cd
Access to the warehouse
After that, move the disk
The gear shield is tight
Electron tester, machine
Get back to normal。
Example 4: while a hale dvd-h2167 video disk presses the warehouse key
"open", but the tray cannot be sent out。
Repairs: the back panel of the electrical power is normal. Open the hood and watch the lead when you press the key
The motor, the laser head, all have normal movements. Only the loader is partially inactive. Make the barn
The door could not be opened, so check loading first
The electrical power supply control component is normal。
Loader working voltage set
Control module 6208 through the plug
L1 is available. Measuring power at the i1 end
Pressure. I1, when we're out
Foot voltage 0v, normal value +5v
See table 2. Measured an integrated block 6208
Work voltage, four feet and eight feet out
It's a zero-v when you're in position
See table 3。
As a result of the integration block
Control, check the command control end six feet, power
Pressure abnormal. Measure pressure-relief on eight feet
R391
1) controlled voltage at front end
Usually, back-end voltage is almost ov
We're on our way
Changed 39, machine
Get back to normal. One
Foot
Outage voltage {v)
Foot number out of silo voltagef
Into storage voltage iv)
2. 5
2. 5
81
Three
Home electrical maintenance, no. 4 of 7th year
29
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