Technical description and composition of the DAEWOO DLP-32C7 TV, panel type and applicable modules. The composition of the modules.DAEWOO
Model: DLP-32C7
Panel: LC320W01 (SL) (A1)
Inverter (backlight): KLS-EE32HK14A rev02
PWM Inverter: OZ9666SN (24)
MOSFET Inverter: K4075 (3)
Trans Inverter: IT-255-077C
Power Supply (PSU): FEL-3226H ver-01
PWM Power: A6252 (8), L6598 (PWM Resonant 16pin), L6562 (PFC)
MOSFET Power: P13NK60ZFP, P6NK60ZFP, STR-A6252, L6562N
MainBoard: DLP-32C6 4859814993-02
IC MainBoard: MST96889LD-LF, V58C2128164SB15, TDA9886T, TDA8931T, 24C64A
Tuner: 4 UV1316 / A I H-4
Control: R55G10
Technical Specifications DLP-32C7
DAEWOO DLP-32C7
General recommendations for repairing TV LCD
Possible malfunctions
- The DAEWOO DLP-32C7 TV does not turn on and does not show any signs of turning on at all. There are no reactions to the control buttons or the remote control.
In most of these cases, the FEL-3226H main switching power supply is faulty. It is necessary to measure its secondary output voltage, and in case of their absence, check the health of the power switches (P13NK60ZFP, P6NK60ZFP, STR-A6252, L6562N) of the 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) A6252 (8), L6598 (PWM Resonant 16pin), L6562 (PFC). It is checked only by replacement with a known good one.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
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 inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- 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 4859814993 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). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - MST96889LD-LF, V58C2128164SB15, TDA9886T, TDA8931T, 24C64A which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
Before replacing the tuner 4 UV1316 / A I H-4, if there is no tuning for the channels, first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
Once again, remind users! Attempts to self-repair a DAEWOO DLP-32C7 TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> DAEWOO DLP-26C2, DLP-26C3, DLP-32C1, DLP-32C2, DLP-32C3, DLP-32C5, DLP-32C6, DLP-32C7, DLP-37C3, DLP-37C7 chassis SL-500P
The appearance of the MainBoard DLP-32C6 is shown in the figure below:DLP-32C6
PSU Advanced
The DLP-32C7 model uses the FEL-3226H power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a boost converter based on the L6562 PWM controller, which eliminates the charge current of the electrolytic capacitor of the rectifier filter directly from the network through open diodes, when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
The appearance of the power supply
Main features of the DAEWOO DLP-32C7 device:
Installed matrix (LCD panel) LC320W01 (SL) (A1).
To power the backlight, an inverter KLS-EE32HK14A is used, it is controlled by the PWM controller OZ9666SN (24). The transformer IT-255-077C is installed in the inverter converter. As power elements of the inverter, keys of the K4075 type (3) are used.
The necessary supply voltages for all nodes of the DAEWOO DLP-32C7 TV are generated by the FEL-3226H power module or its analogs using A6252 (8), L6598 (PWM Resonant 16pin), L6562 (PFC) microcircuits and power switches of the type P13NK60ZFP, P6NK60ZFP, STR -A6252, L6562N.
MainBoard - the main board (motherboard) is a DLP-32C6 module, using microcircuits MST96889LD-LF, V58C2128164SB15, TDA9886T, TDA8931T, 24C64A and others.
Tuner 4 UV1316 / A I H-4 provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC320W01-SLA1
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, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8/10 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 14 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Brand: DAEWOO, Model: DLP-32C7.
Briefly from the TV: LCD, 32 ", 1366x768, 720p HD, there is PIP, sound: 20W, HDMI: 2.
The composition uses MainBoard 4859814993-02 DLP-32C6 and LCD panel (matrix) LC320W01 (SL) (A1).
Power Supply Unit (PSU) FEL-3226H ver-01 Power Supply.
DAEWOO DLP-32C7 LCD TV with LC320W01 (SL) (A1) LCD, 32 "(81 cm) diagonal size in 16: 9 format. 500 cd / m² screen brightness is provided by CCFL (EEFL) lamps. Dynamic contrast 5000: 1 is achieved by special control of the backlight operation. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and generation digital signal occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i.
The power of the sound system 20 W (2x10 W) provides two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, S-Video, component, SCART x2, RGB, VGA, HDMI x2. An output for connecting headphones is provided. A VGA (D-Sub 15) connector is used to connect a computer or laptop. This interface supports resolutions: 640x480, 800x600, 1024x768.
Overall dimensions: With stand 476x402x190 mm, Without stand 1060x758x133 mm.
Attention! The LC320W01 (SL) (A1) panel of a DAEWOO DLP-32C7 LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!