Technical description and composition of the DAEWOO DLP-26H1C TV, panel type and applicable modules. The composition of the modules.DAEWOO
Model: DLP-26H1C
Chassis / Version: RSAG7.820.1037
Panel: V260B1-L02
T-CON: RSAG7.820.1330 LCD26W19NEUROH CM1671A-KQ
Inverter (backlight): integrated into PSU
PWM Inverter: FAN7313
Trans Inverter: BCQ-EEA17-H
Power Supply (PSU): HLP-20A11
PWM Power: FAN7602, FAN7530 (PFC), FAN7382 (Standby)
MOSFET Power: FQPF3N80C, FQPF10N60C, FQPF7N60U
MainBoard: RSAG7.820.1037 - LCD26W19NEU (0) / 115780
IC MainBoard: TDA9886TS, TPA3101D2, MST9E88L-LF, 24C32AN, A25L40PUO, HY5DU281622FTP-5, TMDS341A
Tuner: TDQ-6FT / N126H / ROH
Control: EN-31906D
Appearance
DAEWOO DLP-26H1C
General recommendations for repairing TV LCD
Possible malfunctions
- DAEWOO DLP-26H1C TV does not turn on, does not respond to the remote control and control panel buttons, indicators do not light up and do not blink.
In the vast majority of such cases, a malfunction is detected in the HLP-20A11 power module. It is necessary to measure its secondary output voltages, and in case of their absence, check the serviceability of the power switches (FQPF3N80C, FQPF10N60C, FQPF7N60U) of converters and rectifier diodes for a short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power key can be PWM (PWM) FAN7602, FAN7530 (PFC), FAN7382 (Standby). It is checked only by replacement with a known good one.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply to the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after their completion it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the RSAG7.820.1037 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements TDA9886TS, TPA3101D2, MST9E88L-LF, 24C32AN, A25L40PUO, HY5DU281622FTP-5, TMDS341A. BGA chip malfunctions are usually easy to detect by warming up.
If the TV works normally from external devices, but does not tune into television channels, the TDQ-6FT / N126H / ROH tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> DAEWOO DLP-26H1, DLP-32H1 chassis MST9E88
The appearance of the MainBoard RSAG7.820.1037 is shown in the figure below:RSAG7.820.1037
RSAG7.820.1037 can be used in TVs:
BBK LT2614S (Panel V260B1-L02), BBK LT3214S (Panel LC320W01 (SL)(A1)), BBK LT4214S (Panel LC420WX7 Sl A1), BBK LT3215S (Panel LC320WX3 (SL)(C1)), BBK LT4014S (Panel LTA400WT-L17), DAEWOO DLP-26H1C (Panel V260B1-L02).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the HLP-20A11 module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the FAN7530 PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the DAEWOO DLP-26H1C device:
Installed matrix (LCD panel) V260B1-L02.
The matrix control uses the Timing Controller (T-CON) RSAG7.820.1330.
To power the backlight, a converter is used, combined with the power supply, controlled by the FAN7313 PWM controller. A transformer BCQ-EEA17-H is installed in the inverter converter.
The necessary supply voltages for all nodes of the DAEWOO DLP-26H1C TV are generated by the HLP-20A11 power module or its analogs using FAN7602, FAN7530 (PFC), FAN7382 (Standby) microchips and power switches of the type FQPF3N80C, FQPF10N60C, FQPF7N60U.
MainBoard - the main board (motherboard) is an RSAG7.820.1037 module, using TDA9886TS, TPA3101D2, MST9E88L-LF, 24C32AN, A25L40PUO, HY5DU281622FTP-5, TMDS341A and others microcircuits.
The TDQ-6FT / N126H / ROH tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CMO
Model: V260B1-L02
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 575.769x323.712 mm
Brightness: 450 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 72%
Response Time: 3/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: RSDS (1 Channel), 45 pins
Voltage: 5.3.3 / 5.0V (VDD / VIN5)