Yamaha RX-V671 Service Manual page 66

RX-V671/HTR-6064/RX-A710
S4. ROM VERSION/CHECKSUM
The firmware version and checksum values are displayed.
The checksum is obtained by adding the data at every 8-bit and expressing the result as a 4-figure hexadecimal
notation.
*
Numeric values in the figure are given as reference only.
66
S4-1. SYSTEM VERSION
The firmware version is displayed.
S4-2. MICROPROCESSOR VERSION
The firmware version of MICROPROCESSOR (IC81 on DIGITAL P.C.B.) is displayed.
S4-3. MICROPROCESSOR CHECKSUM
The checksum value of MICROPROCESSOR (IC81 on DIGITAL P.C.B.) is displayed.
S4-4. FLASH ROM VERSION
The firmware version of FLASH ROM (IC82 on DIGITAL P.C.B.) is displayed.
S4-5. FLASH ROM CHECKSUM
The checksum value of FLASH ROM (IC82 on DIGITAL P.C.B.) is displayed.
S4-6. BF (NETWORK microprocessor) VERSION
The firmware version of BF (NETWORK microprocessor, IC901 on DIGITAL P.C.B.) is displayed.
S4-7. BF (NETWORK microprocessor) CHECKSUM
The checksum value of BF (NETWORK microprocessor, IC901 on DIGITAL P.C.B.) is displayed.
S4-8. DSP1 VERSION
The firmware version of DSP1 (IC921 on DIGITAL P.C.B.) is displayed.
S4-9. DSP1 CHECKSUM
The checksum value of DSP1 (IC921 on DIGITAL P.C.B.) is displayed.
S4-10. INVALID ITEM
Not for service.