Marantz SR7005 – 7channel Surround Receiver – how to upgrade the firmware by DPMS – amp-schematic

marantz -SR7005 /N1SG/N1B/U1B/K1Bs AV Surround Receiver – Firmware update – idling current adjustment

Power amplifier Rated output
Front : 
125 W + 125 W (8 Ω, 20 Hz – 20 kHz with 0.08 % T.H.D.)
Center :

125 W (8 Ω, 20 Hz – 20 kHz with 0.08 % T.H.D.)
Surround :125 W + 125 W (8 Ω, 20 Hz – 20 kHz with 0.08 % T.H.D.)
Surround back / Front height / Front wide: 125 W + 125 W (8 Ω, 20 Hz – 20 kHz with 0.08 % T.H.D.)
Maximum effective output power 
Front : 195 W + 195 W (6 Ω, 1 kHz with 10 % T.H.D.)
Center : 195 W (6 Ω, 1 kHz with 10 % T.H.D.)
Surround : 195 W + 195 W (6 Ω, 1 kHz with 10 % T.H.D.)
Surround back / Front height / Front wide: 195 W + 195 W (6 Ω, 1 kHz with 10 % T.H.D.)

Idling Current

Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room temperature 15 °C ~ 30 °C (59 °F ~ 86 °F).
Presetting
• POWER (Power source switch) STANDBY
• SPEAKER (Speaker terminal) No load  (Do not connect speaker, dummy resistor, etc.)

Remove top cover and set VR401, VR402, VR403, VR404, VR405, VR406, VR407 on 7CH AMP UNIT at fully counterclockwise (c) position.
(2) Connect DC Voltmeter to test points (FRONT-Lch: TP401, FRONT-Rch: TP402, CENTER ch: TP403, SURROUNDLch: TP404, SURROUND-Rch: TP405, SURROUND-BACK Lch: TP406, SURROUND-BACK Rch: TP407.
(3) Connect power cord to AC Line, and turn power switch "ON".
(4) Presetting.
MASTER VOLUME : "---" counterclockwise (c min.)
SPEAKER (Speaker terminal) : No load
(Do not connect speaker, dummy resistor, etc.)
MODE : MULTI CH STEREO
FUNCTION : DVD
(5) Within 2 minutes after the power on, turn VR401 clockwise (x) to adjust the TEST POINT voltage to 8 mV ± 0.5 mV DC.
(6) After 10 minutes from the preset above, turn VR401 to set the voltage to 8 mV ± 0.5 mV DC.
(7) Adjust the Variable Resistors of other channels in the same way.

Main amplifier and SMPS circuit diagram

How to update by DPMS

Connecting to the Network
(1) System Requirement
・ Internet Connection by Broadband Circuit
・ Modem
・ Router
・ Ethernet cable (CAT-5 or greater recommended)
(2) Setting

Check for Update and Update

Check if the latest firmware exists. You can also check approximately how long it will take to complete an update.

(1) Press the MENU button on the remote control to display the GUI menu.

(2) Use the cursor buttons to select "Manual Setup" → "Option Setup" → "Firmware Update" → "Update Check".

(3) Press the ENTER buttom.

・ The latest version of the firmware uploaded to the web is displayed.

・ If the latest firmware version is on the web, proceed to (4).

・ If the latest firmware is already installed, press the MENU button to close the menu.

(4) Use the cursor buttons to select "Update", then press the ENTER button.

・ During update, the power indicator lights red and the GUI screen is shut down. And a rough remaining time is indicated on the display.

・ When updating is complete the power indicator turns off and normal status is resumed.

(5) Press the MENU button to close the menu.