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The On-screen Service Adjustment Menu system employed in the VB7C
chassis replaces the resistors used to change the voltage on the option pins
of the previous CPU. In order to program the CPU for the different options
available for the VB7C chassis, the On-screen Service Adjustment Menu is
used to change the option data in IC802, the EEPROM.
CPU PROGRAMMING
IC801
CPU
R808
IIC
33
SCL
IIC
31
SDA
Memory Control Circuits
The Service Adjustment Menu display shown below and the following table
show the different options available and the necessary data. The option data
shown are for Mode AVM-2780G and include these options: with Clock, with
Surround, with Software for PIP Rating Information Processing, with Color
Enhancer, with Initial Channel, with PIP, with 2 AV Inputs, and with Bass &
Treble controls.
ALWAYS
5V
L801
C801
R807
– 4 –
IC802
EEPROM
6
SCL
5
SDA
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