Marantz SR-12N1G, Service Manual

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10. UPDATE FIRMWARE
Software for CPU and DSP can be updated.
Have *SR12S1CDR update disc.
There are two mode of download, regarding to the target of software as bellow.
Mode 1: Download DSP’s software to 4M Flash-ROM.
This mode is to update the software for DSP.
The target devise is 4M –Flash ROM (Q671) on P604.
SR-12S1 need to be set download condition, by three front keys.
Mode 2 : Download CPU’s software to internal Flash-ROM.
This mode is to update the software for CPU.
The target devise is internal flash ROM of CPU (QU01) on P604.
The unit needs to be set to writing condition, by pushing internal switch from back-panel.
The following items are required for updating.
RS232C Dsub-9 pin cable (female to female/Straight type)
PC (Windows 98, NT, ME, 2000) with RS-232C port.
Upgrade software to CPU.
Upgrade software to DSP.
Use RS232C Dsub-9 pin cable (female to female/Straight type) to connect PC and the unit.
COM port on PC needs to be set by dialog box for each program. COM port can be set from COM1 to COM5.
Download Firmware for DSP (Mode 1)
1. Put the "DSP upgrade" folder into anywhere on your PC’s hard disc.
2. Connect PC and the unit with the RS-232C cable.
3. Turn on the unit.
4. Press TUNER, AUX1 and MULTI ROOM buttons simultaneously more than 5 seconds to turn the unit into Loading
Mode.
5. "LOADING MODE" will be shown on FLD.
6. Launch "UpgradeDSP.exe" on PC.
7. Set the Baud Rate to 38400 then click Start communication button. If the connection is made successfully, a dialog
box saying "Success to connect" appears and "CONNECTED" is displayed on FLD.
8. Click Send the DSP codes button on the dialog box. Progress status of downloading will be shown on PC and
"LOADING" is displayed on FLD.
9. If downloading is completed successfully, "COMPLETED" is displayed on FLD. And a dialog box saying "Finished the
DSP code transmitting" appears. Click OK and then click CLOSE to close the application.
10. Turn off the unit.
ATTENTION:
The program isn’t written in the ROM of QU01 and Q671.
• When QU01 or Q671 was replaced, Writing of software is necessary.
• Write it with the procedure of UPDATE FIRMWARE