Checking Versions Of Firmware And Updating - Hitachi DZ-HS303A Service Manual

Troubleshooting > Display of Error Codes and Troubleshooting / Checking Versions of Firmware and Updating
Caution
Laser light striking the eye may cause your eyesight to be lost: For safety, be sure to remove any power
supply (AC adapter/charger, battery, etc.) from the DVD video camera/recorder before starting work.
3) Check to see whether the optical pickup is dirty: If it is not dirty, cleaning is not necessary.
If the optical pickup is dirty, use the following procedure to
clean it:
a) Drip one droplet of absolute alcohol on a cotton swab
Lens cleaner liquid for CD/DVD (generally available) is
also usable in place of absolute alcohol.
b) Use the cotton swab to clean the optical pickup in the
direction of the arrow using just enough force that it
lightly goes down: Using undue force or incorrect
cleaning direction could cause a fault.
*1: Use a cotton swab free from any additive or chemical:
Those made by Jhonson&Jhonson are recommended.
Never reuse a used cotton swab.

4-4 Checking Versions of Firmware and Updating

The DVD video camera/recorder stores in fl ash memory the fi ve types of fi rmware program shown in
Table 4-4-1. These fi rmware programs can be updated whenever necessary to improve performance.
Check to see whether any defects in the DVD video camera/recorder can be eliminated by updating
any fi rmware programs: If improvement is likely, update them.
Information:
The information on how to upgrade the fi rmware, obtain fi rmware data and create a disc or card
containing upgraded fi rmware will be reported on service bulletin, etc.
Table 4-4-1 List of DVD video camera/recorder Firmware Programs
Type of fi rmware
System fi rmware
Camera microprocessor fi rmware
Drive main fi rmware
Drive core fi rmware
Loader fi rmware
(*1)
.
Controls the operation of entire system, including recording, playback,
Disc Navigation, connections with external devices, clock, battery,
input/output etc..
Controls the operation of camera block (including optical system).
These programs control the DVD drive system (mechanism block)
Performs settings when the DVD video camera/recorder starts
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Cotton swab
Optical pickup
Fig. 4-3-4 Cleaning Optical Pickup
Description
Turntable