Cautions For Handling The Hdd - Sony RDR-HXD790 Service Manual

HDD Information (Simplified measurement mode)
1) Turn on the main power.
2) Press "ESC".
3) Press "DISP".
4) Press "DIG/ANA" three times.
HDD Info
Life Time : --h --m --s
[Tips]
• How the cumulative HDD-on time data is processed in memory
Storage place:
FLASH ROM
Timing for referring to the cumulative HDD-on time data:
If the power attempts to turn on but fails, the unit refers to the FLASH ROM.
Timing for updating the cumulative HDD-on time data:
While the HDD is on, the cumulative HDD-on time data in the RAM is updated every 3 seconds, and the data is stored in the Backu p
SRAM every update. When the power is turned off, the data is stored in the FLASH ROM.
• How to clear the cumulative HDD-on time data
FLASH ROM:
When the HDD Identification Setting is configured, the cumulative HDD-on time data is automatically cleared.
The HDD Identification Setting is automatically configured when the CPRM setting is configured on the CPRM setting screen.
(To display the CPRM setting screen, press the "ESC" key, then the "STEREO" key.)
Note: The cumulative HDD-on time data is not cleared when resetting to default values.
The cumulative HDD-on time data is not cleared when the system-control computer software is downloaded.
5) Press "ESC". (Returns to the original screen)

6-2-6. Cautions for handling the HDD

(1) Cautions for handling the HDD
• The HDD is very sensitive to shocks and vibrations. Care must be taken especially during operation (when the power is on).
• The HDD is very sensitive to electrostatic charges.
• Rapid change in temperature or humidity may cause deterioration of the HDD.
Note: After receiving damage caused by any above-mentioned factors, the HDD may operate normally for dozens or hundreds of hours, but then suddenly
crash. If you are certain you have damaged a new repair part (HDD) while making repairs, do not use the part.
Reference: Main specifications for damage to the HDD
During operation
Shock G
Approx. 20 G or more
(acceleration)
Temperature change 15 °C/hour or more
Moisture change 20%/hour or more
Reference: Estimated value of falling distance vs. shock (G) when the HDD is dropped without protection
Landing
Falling surface
distance
0.5 inch / 12.7 mm
1.0 inch / 25.4 mm
2.0 inch / 50.8 mm
4.0 inch / 101.6 mm
During
nonoperation
Approx. 200 G or more
Granite Concrete
surface floor
387 217
595 457
1133 600
1795 1040
* Checks the HDD power-on time.
The HDD is about 10 times as sensitive to shock during
T
operation compared to nonoperation.
Synthetic-resin- Antistatic
coated table sponge
200 26
310 37
680 70
1050 267
6-7