(At-143 Board) - Sony HDW-750 Maintenance Manual

In the case of ROM on the FP-121 board and SS-92 board:
(1) Check to see that the message "COMPLETE !"
appears indicating that the version indication has
changed.
O
03 ROM VERSION
COMPLETE !
AT : Ver 1.00
→
SS : Ver 1.01
FP : Ver 1.00
EQ : Ver 1.00
7. Turn off the main power and then back on to start the
unit for upgrading of the ROM to take place.
HDW-750/750CE V1
1-24-3. When the ROM-28 Board Is Used for
Version Upgrading (AT-143 Board)
Required tool : ROM-28 board
(Sony part No. : A-8326-017-A)
n
The upgrading program must have already been saved in
the ROMs (IC2 and IC3) on the ROM-28 board before.
(For details of saving the upgrading program, contact your
local Sony Sales Office/Service Center.)
1. Open the inside panel assembly.
(Refer to Section 1-5.)
2. Insert CN1 of the ROM-28 board to CN6 on the AT-
143 board.
3. Set the switch S1 on the ROM-28 board as shown in
the illustration.
4. Turn on the main power. Then the data stored in the
ROM-28 board are transferred to the ROM on the AT-
143 board in 10 and a few seconds.
5. Turn off the main power and remove the ROM-28
board.
6. Close the inside panel assembly.
(Refer to Section 1-5.)
7. Turn on the main power to start the unit for upgrading
of the ROM to take place.
1-24. Upgrading the ROM Version
AT-143 board (CN6)
Switch knob
S1
CN1
ROM-28 board
1-61