Technical description and composition of the ROLSEN RL-32B04U TV, panel type and modules used. The composition of the modules.ROLSEN
Model: RL-32B04U
Chassis / Version: LCD32P69R MTK8222
Panel: LC320WXN (SC) (A1)
T-CON: LA723J / 6870C-0313B
Inverter (backlight): LC320WXN 6632L-0624A
Power Supply (PSU): RSAG7.820.1666
PWM Power: NCP1396, NCP33262 (PFC), STR-A6059H (Standby)
MOSFET Power: K3560, K3569 (PFC)
MainBoard: MTK8222
IC MainBoard: CPU: MT8222, SPI Flash: MX25L3205D
Tuner: TDQ-6FT / W126HROH
Control: IR: RSAG7.820.996-ROH Ver.C
RL-32B04U Specifications
ROLSEN RL-32B04U
General recommendations for TV LCD repair
Repair of electronic equipment usually begins with its external examination and diagnosis of a malfunction. In this case, you should inspect all internal chassis elements, as well as external hull ones. It often happens that visible damage to elements or connections helps determine the direction of troubleshooting. 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.
If the power supply module E166702 RSAG7.820.1666 is faulty, external manifestations may be different, for example, ROLSEN RL-32B04U does not turn on at all and there is no indication of control lamps on the front panel. With the same symptoms, the regulator (converter) of the control processor power supply may be faulty. It is advisable to start diagnostics of the power supply module by checking the condition of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. In the event that the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in a breakdown state in such situations.
Power switches in switching power supplies (SMPS) fail for no reason very rarely and, if they break down, it is necessary to look for a malfunction in the stabilization circuits, checking electrolytic capacitors, semiconductor devices and resistors in the primary circuit. The reason may be a malfunction of the PWM regulator microcircuit, which can only be checked by replacing it with a new or known good one.
If when you turn on the ROLSEN RL-32B04U there is no image, or it appears for a second and disappears completely, but there is sound, most likely either the backlight lamps or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the common power supply. When turning off the protection in order to ensure the possibility of diagnosing the malfunction, special care should be taken, and after all repair work is completed, it is imperative to restore the circuits and the operation of the inverter protection for the further safe operation of the TV.
On the LCO32P69R (1) motherboard, in the event of a malfunction, you should first check the operability of all stabilizers or power converters of microcircuits and, if necessary, update the software (software).
Remember! Attempts to repair the ROLSEN RL-32B04U TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
Service Manual with Schematic Diagram 47 pages 2009 on model RL-32B04U
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> ROLSEN RL-32B04U, Main: MTK8222
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> ROLSEN RL-32B04U, HISENSE LCD32W58R, LCD32P69R Chassis MTK8222_SM
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> RSAG7.820.1666
Additionally by PSUThe RL-32B04U TV has an RSAG7.820.1666 power module using a PFC (Power Factor Correction) circuit that acts as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the NCP33262 PWM controller does not allow the electrolytic capacitor of the input rectifier filter to be connected to the network directly through open diodes, when the charge current is determined by its reactance (about 15-30 ohms at a frequency of 50 Hz). As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current follows the phase and shape of the sinusoid of the input voltage. Checking the health of the PFC unit is carried out by measuring the constant voltage across the capacitor of the network rectifier. In working mode it should be about 380V, in standby about 300V.
External view of the power supply
The main features of the ROLSEN RL-32B04U device:
Installed matrix (LCD panel) LC320WXN (SC) (A1).
Matrix control uses the LA723J Timing Controller (T-CON).
An LC320WXN inverter is used to power the backlight lamps.
The formation of the required supply voltages for all nodes of the ROLSEN RL-32B04U TV is carried out by the RSAG7.820.1666 power module, or its analogs using NCP1396, NCP33262 (PFC), STR-A6059H (Standby) chips and power switches of the K3560, K3569 (PFC) type.
MainBoard - the main board (motherboard) is a MTK8222 module, using CPU chips: MT8222, SPI Flash: MX25L3205D and others.
The TDQ-6FT / W126HROH tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG Display
Model: LC320WXN-SCA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
ROLSEN RL-32B04U LCD TV LC320WXN, 32 "(81 cm) 16: 9. Brightness 450 cd / m² backlit by CCFL (EEFL) fluorescent lamps. Dynamic contrast ratio 30000: 1 is provided by special control of operation illumination depending on the illumination of areas in the scene.It is possible to view images in high quality HD at a resolution of 1366x768 pixels in the standard graphic decomposition of 720p (HD Ready) .Input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and shaping digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i Supported media 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 x2, audio x4, S-Video, component, SCART x2, RGB, VGA, HDMI x3, USB x2. 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 network is 160 watts.
Dimensions: with stand 800x599x242 mm, without stand 800x545x107 mm.
TV weight: 14 kg.
Attention! ROLSEN RL-32B04U LCD TV panel LC320WXN (SC) (A1) is its most expensive component.
Avoid hitting the glass and putting pressure on the screen surface to avoid irreversible damage to the LCD panel!