Marantz AV7005/N1B, Service Manual

Page: 6 / 199

6
CAUTION IN SERVICING
Firmware update
• When you replace the DIGITAL UNIT ASSY (8U-310051E), you need software updates.
Refer to "VERSION UPGRADE PROCEDURE OF FIRMWARE (26 - 36 page) .
Please update the following procedure.
1. First, Please update by DFW (33 - 36 page).
2. Next, Please update the latest
fi rmware by DPMS (26 - 32 page).
Initializing AV Pre Tuner
AV Pre Tuner initialization should be performed when the μ com, peripheral parts of μ com, and Digital P.W.B. are
replaced.
1. Turn off the power using ON/STANDBY button.
2.
Press ON/STANDBY button while simultaneously pressing SURROUND MODE and AUTO buttons.
3. Check that the entire display is fl ashing with an interval of about 1 second, and release your fi ngers from the 2
buttons and the microprocessor will be initialized.
Service Jigs
When you repair the printing board, you can use the following JIG (Extension cable kit).
Please order to marantz Of
fi cial Service Distributor in your region if necessary.
8U-110084S : EXTENSION UNIT KIT : 1 Set
(Refer to "JIG FOR SERVICING".)
Note:
•
If step 3 does not work, start over from step 1.
•
All user settings will be lost and this factory setting will be recovered when this initialization mode.
So make sure to memorize your setting for restoring after the initialization.
ON/STANDBY
SURROUND MODE
AUTO