Sony VPLL-CT10, Service Manual

Page: 96 / 196

3-12
VPL-PS10/PX10/PX15
3-6. Memory
Memory structure of PX10 and PS10 consists of the
following memory blocks.
1. Set memory
2. Status memory
3. Channel memory
4. Chroma memory
5. W/B memory
6. Installation memory
CPU internal ROM : 256 Kbyte Flash Memory
CPU internal RAM : 16 Kbyte
External NVM memory : 8 Kbyte EEPROM
The gamma mode function is realized adding offset to the
Contrast output value and the Brightness output value to
the devices. The conventional gamma memory is not used
in this machine.
Outline of the data flow is described as follows. When the
AC power plug is inserted to the wall outlet (Standby
state), all of the data stored in the internal ROM are written
into the NVM (non-volatile memory). When the POWER
switch is turned on afterward, all the data such as status
memory data and others that are required for the present
video image are selected from each memory block and are
expanded in the internal RAM.
When any adjustment is executed, the result adjustment
data are saved automatically (when the adjustment is made
on the User mode item) or saved as triggered by the
memory operation (when the adjustment is made on the
Service/Factory mode item) in the NVM.
Note that the data of the adjustment items (W/B and device
adjust) that can be adjusted by the Service mode or Factory
mode, are saved in the NVM after the memory operation is
performed upon completion of the adjustment by user.
Note that the default factory adjustment data are lost at this
moment.