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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Saturday, 15 August 2020

REPAIRING / SERVICING TV ROLSEN RL-32L1001U

Technical description and composition of the ROLSEN RL-32L1001U TV, panel type and modules used. The composition of the modules.
ROLSEN LED
Model: RL-32L1001U
Chassis / Version: RSAG.820.2076
Panel: HE315BH-D01 // HI315BT-C01 // HE315CH-D21
LED driver (backlight): integrated into PSU
PWM LED driver: MAC6PVAGN
MOSFET LED driver: 3N40
Power Supply (PSU): RSAG7.820.1947 / ROH VER.G
PWM Power: NCP33262 (PFC), A6059H (Stb), NCP1396
MOSFET Power: 10N60
MainBoard: RSAG7.820.2076 / VER.B
IC MainBoard: MX25L3205D
Control: EN-31603R
RL-32L1001U Specifications
ROLSEN RL-32L1001U
General recommendations for TV LCD LED repair
Possible malfunctions
- The ROLSEN RL-32L1001U TV does not turn on and does not show any signs of operability at all. No response to the remote control and front panel control buttons.
In some of these cases, the fault is detected in the power supply module RSAG7.820.1947. It is necessary to make sure that its output voltages are present and, if they are completely absent, check the power switches (10N60) and rectifier diodes for a possible short circuit.
In case of breakdowns in the secondary circuits of the converter, it can usually work in an emergency mode in a short-circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse or current sensor in the source of the key most often breaks off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) NCP33262 (PFC), A6059H (Stb), NCP1396, in the absence of external damage and short circuit between the terminals, are checked by replacing them with known good ones.
- There is no image, there is sound, it reacts to the remote control. Or, immediately after switching on for a second, the image may appear and immediately disappear.
The most likely problem in these cases is a malfunction of the LED backlight. The reason may be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to identify an open circuit in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and a voltage of several tens of volts is required to open their junctions. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Usually, Chinese multimeters lightly light up one 3-volt LED if you connect the probes to it in the forward direction (red probe to the anode, black to the cathode). For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of LED health. In the event of a malfunction of the LED, its zener diode will either be cut off, or broken through in the K / Z.
- The TV does not turn on, the indicator signals standby or operating mode, or blinks.
Repair or diagnostics of the RSAG7.820.2076 motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) elements of the MainBoard - MX25L3205D. In cases where a BGA processor is used, its malfunction is usually detected by a local warm-up method.
Attention to users! Self-repair of the ROLSEN RL-32L1001U TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!


DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    RSAG7.820.1947 Power supply 


 DOWNLOAD FIRMWARE FOR SPI FLASH  ----------->   ROLSEN RL-32L1001U, Main: RSAG7.820.2076 / VER.B, Panel: HI315BT-C01


External view of the power supply
The main features of the ROLSEN RL-32L1001U device:
Installed matrix (LED panel) HE315BH-D01 or HI315BT-C01 or HE315CH-D21.
To power the backlight LEDs, a converter combined with a power supply is used, which is controlled by the MAC6PVAGN PWM controller. The keys of the 3N40 type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the ROLSEN RL-32L1001U TV is carried out by the RSAG7.820.1947 power module, or its analogs using NCP33262 (PFC), A6059H (Stb), NCP1396 power switches and 10N60 type power switches.
MainBoard - the main board (motherboard) is an RSAG7.820.2076 module, using MX25L3205D microcircuits and others.
ROLSEN RL-32L1001U TV with LCD HE315BH-D01, 32 "(81 cm) 16: 9 diagonal. The required screen brightness of 480 cd / m² is provided by LED backlighting. Contrast, as the ratio of maximum brightness to minimum, is 3000: 1 Dynamic contrast ratio 120000: 1 is achieved by special control of LED operation.The technology of production of the screen of this TV model is realized with LED backlighting.It is possible to view images in high quality HD at a resolution of 1366x768 pixels in the standard graphic resolution 720p (HD Ready). or the video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal formation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported multimedia file formats: MP3, JPEG.
Speaker power 12 W (2x6 W) is provided by two speakers. Uses NICAM stereo processing system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART x2, RGB, VGA, HDMI x3, USB x2. A headphone output is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector on the TV case is used, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
The power consumed by the TV in operating mode from the network is 80 watts.
Dimensions: with stand 797x573x230 mm, without stand 797x524x37 mm.
TV weight: 12.5 kg.
Attention! The HE315BH-D01 panel of the ROLSEN RL-32L1001U LED TV is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.


Posted By: FRANK at 04:21
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