Sony PDW-U4 Service Manual page 35

Professional disc drive unit
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Main
Sub
ERROR/ALARM indicator
Code
Code
Lighting
Switching off
interval
condition
02
0A5
0.25 seconds
Power
0A7
0.25 seconds
Power
0A8
0.25 seconds
Disc/Power
Description
Error remedy method
Optical block assembly
1. Eject the cartridge.
0Bch detected a laser
2. Check laser parameter 0 of hours meter.
output error.
When laser parameter 0 of hours meter has:
• not reached the end of replacement cycle:
There is something wrong with the optical or electrical system in
optical block assembly (OP-0).
Laser drive overcurrent
• reached the end of replacement cycle:
was detected in optical
It is likely laser in optical block assembly (OP-0) reached to the end of
block assembly 0Bch.
its life cycle.
3. Replace optical block assembly (OP-0).
Optical block assembly
1. Eject the cartridge.
0Bch determines that
2. Startup the maintenance menu and display [CHECK] > [LOADER].
there is no cartridge, and
3. Insert the cartridge and check [DOWN SENSOR] and [SENSOR
then the laser output is
HOLE].
stopped.
• when [DOWN SENSOR] is set to [DOWN] and [SENSOR HOLE]
displays "4":
The problem is fixed. Use the unit as it is.
• when [DOWN SENSOR] is set to other than [DOWN] and [SENSOR
HOLE] does not display "4":
There is a possibility that a detection sensor is damaged.
Go to step 4 in the error remedy method.
4. Check the corresponding detection sensors, and then replace the
SE-1004A board or the SE-1005A board.
Refer to section
"2-1-1. Digital Hours Meter"
"2-1-2. Periodic Inspection and
Replacement Parts List"
"4-5. Optical Block Assembly"
"6-4-4. LOADER"
"1-6. Location of Sensors and
Their Functions"
Continued
32

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