REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Thursday, 7 February 2019

MARANTZ SR7005 – 7 CHANNEL SURROUND RECEIVER – HOW TO UPGRADE THE FIRMWARE BY DPMS – AMP-SCHEMATIC

Marantz SR7005 – 7 channel 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.
Posted By: FRANK at 04:46
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