Procedure To Rewrite Doctor Program - JVC GR-DVA10 Technical Manual

1. Specification of Doctor Program area
If there is a Doctor Program area in the EEPROM data, the area is specified by coloring (gray) the cell on
the EEPROM utility map.
2. Deletion of Data Editing Function in Doctor Program Area
To avoid trouble caused by data editing in the Doctor Program area, data editing is disabled for the
colored cell (Doctor Program area).
3. Addition of Data Rewriting Function in Doctor Program Area Only
If there is a need of rewriting of the Doctor Program in the field, the manufacturer announces it through the
MCI or Service Bulletin and supplies an EEPROM initial data file including revised Doctor Program data to
the dealers, service stations and others concerned. For rewriting the Doctor Program data, it is required to
use the "Doctor Load" (refer to "Procedure to Rewrite Doctor Program" to be mentioned later) that is the
special function to renew the Doctor Program area only without disturbing other data such as adjustment
data, fixed data and so on. In other words, this special function secures the productivity of the camcorder.
4. Deletion of Doctor Program from Initial Data File
Every service support system software is supplied together with the initial data file. The initial data file to
be used for servicing the model that is designed to be doctored by the Doctor Program from the first stage
of the production should contain the Doctor Program. However, the initial data file for service use is
supplied without the Doctor Program in order to avoid possible trouble caused by mismatching of the
Doctor Program with the microcomputer program as mentioned previously, because the initial data file is
prepared based on the initial data at the beginning of the production. Such being the case, the service
support system software may not demonstrate full of the original function in doctoring the product with the
Doctor Program, however, this demerit is ignored from a viewpoint that doctoring with the Doctor Program
is a simple and easy measures against trouble. In the case the microcomputer is replaced with new one
and it is programmed by the backup data, pay heed the Doctor Program whether it matches the
microcomputer program or not, because the aforementioned way of thinking does not apply to backup
data.

4.1.4 Procedure to Rewrite Doctor Program

The special function "Doctor Load" is newly added to the service support system software. The "Doctor
Load" function facilitates renewal of data in the Doctor Program area only and deletion of the Doctor
Program.
1. Data Renewal in Doctor Program Area Only
In case of necessity of field service to revise the Doctor Program, the manufacturer supplies a data file
necessary for the service. The revision data file is the same format as the initial data file supplied with the
service support system software. If the initial data is rewritten in the EEPROM in the usual manner when
revising the Doctor Program, it brings about such a trouble as other data, for example adjustment data and
data to be fixed, are also rewritten at the same time. To avoid such a trouble, the new function "Doctor
Load" can be used.
1. Read out the EEPROM data.
2. Open the supplied data file (including Doctor Program data) using the "Doctor Load" function
After the data file is loaded, data only in the Doctor Program area is read in the map on the EEPROM
utility (data stored in the EEPROM of the camcorder is not yet rewritten at this stage).
3. Confirm that the Doctor data is read in the map.
4. Write the data in the EEPROM in the usual way.
It is possible that the data only in the Doctor Program is rewritten with this process.
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