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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Friday, 21 August 2020

REPAIRING / SERVICING TV ROLSEN RL-19B01

Technical description and composition of the ROLSEN RL-19B01 TV, panel type and modules used. The composition of the modules.
ROLSEN
Model: RL-19B01
Chassis / Version: RSAG7.820
Panel: HT190WG1-600
Inverter (backlight): Backlight Inverter-JSI-190411A
PWM Inverter: BIT3105
Power Supply (PSU): JSI-190411 A
PWM Power: SG5841SZ (SO8)
MainBoard: RSAG7.820.1653 VER.A
IC MainBoard: MST9E19B-LF, F40-100GCP (EN25F40), K24C32, ATMLH914 04B (24C04), 24C02, TDA9886TS, CD1517CP, DC-DC - Z1015AI
Tuner: TDQ6FT / W126H / ROH
RL-19B01 Specifications
ROLSEN RL-19B01
General recommendations for TV LCD repair
ROLSEN TV made on the RSAG7.820 chassis, like many other electronic devices, it is advisable to start repairing with an inspection of all external and internal elements. Often, according to certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before taking the necessary measurements, which will make it possible to determine a further algorithm for troubleshooting and localizing a defect. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred layer of paint on the resistors - all this for the repairman can be a significant clue in assumptions about the causes and consequences of a malfunction.
In cases where the ROLSEN RL-19B01 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light or blink, and there are no sounds and no signs of operability when turned on, the JSI-190411A power supply module is most likely faulty or there is no power supply to the processor on the motherboard (a typical defect of some ROLSEN TV models). When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the secondary rectifier filter and check the fuse and, if it is broken, the cause must be identified. Often in such cases an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes and transistors in the primary circuit.
The reasons for the breakdown of the power switch in switching power supplies (SMPS) can be different, for example, a malfunction of semiconductor elements or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of a PWM regulator microcircuit or breaks in resistors in its strapping.
Sometimes the ROLSEN RL-19B01 TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or the lamps themselves, which can be checked by replacing. In such cases, it is necessary to make sure that all electrolytic capacitors of the filter are in good working order for the power supply of the inverter itself, including in the power supply unit (power supply unit). All necessary precautions must be taken when disabling the inverter protection during diagnostics and do not leave it disabled after repair is completed.
Repair of the RSAG7.820.1653 VER.A motherboard must begin with diagnostics and testing of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM. Complicated repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace elements MST9E19B-LF, F40-100GCP (EN25F40), K24C32, ATMLH914 04B (24C04), 24C02, TDA9886TS, CD1517CP, DC-DC - Z1015AI. Malfunctions in BGA chips are usually easy to detect by warm-up.
Attention to users! Self-repair of the ROLSEN RL-19B01 TV without proper qualifications and experience can lead to its complete non-repairability!
DOWNLOAD FIRMWARE FOR SPI FLASH  ----------->   ROLSEN RL-19B01, Main: RSAG7.820.1653 VER.A, Panel: HT190WG1-600

Brand: ROLSEN, Model: RL-19B01.
Briefly from the TV: LCD, 19 ", 1440x900, 720p HD, sound: 4 W.


 The appearance of the MainBoard MST6M182VG-T7S is shown in the figure below:
MST6M182VG-T7S can be used in TVs:
DAEWOO DSL-24L31E (Panel K236WL), ERISSON 23LEK14 (Panel 1080p Full HD 1920x1080), ERISSON 19LEK14 (Panel M185BGE-L22 Rev.C1), HYUNDAI H-LED22V5 (Panel LM215WF4), HYUNDAI H-LED24V11 (Panel LM230WF5 (TL)(D1) ), ROLSEN RL-17L1002U (Panel LTN173KT02 ), RUBIN RB-19SL1U WH (Panel 19 ").
External view of the power supply
The main features of the ROLSEN RL-19B01 device:
Installed matrix (LCD panel) HT190WG1-600.
The backlight inverter is used to power the backlight lamps, controlled by the BIT3105 PWM controller.
The formation of the necessary supply voltages for all nodes of the ROLSEN RL-19B01 TV is carried out by the JSI-190411 power module, or its analogs using SG5841SZ (SO8) microcircuits.
MainBoard - the main board (motherboard) is an RSAG7.820.1653 module, using microcircuits MST9E19B-LF, F40-100GCP (EN25F40), K24C32, ATMLH914 04B (24C04), 24C02, TDA9886TS, CD1517CP, DC-DC - Z1015AI ...
The TDQ6FT / W126H / ROH tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: BOE
Model: HT190WG1-600
Type: a-Si TFT-LCD, Panel
Diagonal size: 19.0 inch
Resolution: 1440x900, WXGA +
Display Mode: TN, Normally White, Transmissive
Active Area: 408.24x255.15 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 1.5 / 3.5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
ROLSEN RL-19B01 TV with LCD display HT190WG1-600, 19 "(48 cm) diagonal, 16:10 aspect ratio. Screen brightness of 300 cd / m² provided by CCFL (EEFL) fluorescent lamps. Contrast as the ratio of maximum brightness to minimum, is 700: 1. It is possible to view images in high quality HD at a resolution of 1440x900 pixels in the standard of graphic decomposition 720p (HD Ready) .Input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and digital signal formation takes place in 480i, 480p, 576i, 576p, 720p, 1080i standards.
Speaker power 4 W (2x2 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x3, S-Video, component, RGB, VGA. A headphone output is provided. To connect a computer or laptop to this TV model, use the VGA (D-Sub 15) connector on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
The power consumed by the TV in operating mode from the mains is 60 W.
Dimensions: with stand 479x392x200 mm, without stand 479x323x90 mm.
TV weight: without stand: 5 kg.
Attention! ROLSEN RL-19B01 LCD TV panel HT190WG1-600 is the most expensive component.
Avoid hitting the glass and putting pressure on the screen surface to avoid irreversible damage to the LCD panel!
Posted By: FRANK at 04:59
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