Friday, 27 March 2020

REPAIR / SERVICING TV TOSHIBA 32C3006PR

Technical description and composition of the TOSHIBA 32C3006PR TV, type of panel and applicable modules. The composition of the modules.
Toshiba
Model: 32C3006PR
Panel: LCD PANEL, AX080E002B 75007870 // LCD PANEL, G7LPL32SLA1, LC320W01-SLA1
T-CON: 6870C-0142B (2L) LGDP4801A, TPS65161, M12L16161A
Inverter (backlight): 75012523 HIU-813-M HRevF-7B97-1002 HPC-1655E HIU-813S // 6632L-0458A
PWM Inverter: BD9897, LM2901, LM2904
MOSFET Inverter: 1H335D
Trans Inverter: 700HK
Power Supply (PSU): PE0391A1 75008694 // LOW_B PE0392 75008729
PWM Power: STR-Z2467, STR-W6765, CE-1059
MOSFET Power: F 1H415H
MainBoard: PE0424 A-2, PE0415 V2800052401
IC MainBoard: TA8246AHQ, MSP4410K 07, T5CB5-6UK1, CD4052B, R4580I, FLI8548H-LF, CXB1444R, HY50U281622FTP-4, 39VF3201
Tuner: ENG37E01GF
Control: CT-90288
Specifications 32C3006PR
TOSHIBA 32C3006PR
General recommendations for repairing TV LCD
Repair of the TOSHIBA 32C3006PR TV is better to start with a thorough external inspection and diagnosis of the malfunction. It is advisable to carefully examine the internal and external components. Sometimes, only by some signs can we determine the further direction of the localization of the malfunction. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
Malfunctions of the PC BOARD ASSY, PE0391A1, POWER 75008694 // LOW_B (PE0392) 75008729 power supply module can be expressed in different ways, for example, the TOSHIBA 32C3006PR does not turn on at all and the control lights on its front panel do not light up and do not blink, there are no signs of operability. In this case, the diagnosis and repair of the common power supply should always be started by checking the mains fuse. When it breaks, it is advisable to check for a breakdown, first of all, all power semiconductor elements of the converter and the rectifier diode bridge of the network, as well as the large electrolytic capacitor of the filter of the network rectifier and the key transistor F 1H415H.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip STR-Z2467, STR-W6765,, CE-1059 from the manufacturer.
When using a power factor correction unit (PFC) in the power modules, troubleshooting becomes somewhat more complicated and requires additional experience and knowledge of their operation.
Sometimes the TOSHIBA 32C3006PR 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 of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including in the power supply unit (power supply unit).
When repairing the inverter 75012523 HIU-813-M HRevF-7B97-1002 HPC-1655E HIU-813S // 6632L-0458A, it is often necessary to disable protection for diagnostics, which, for the purpose of fire safety, will disable it in any emergency situation, for example, in case of malfunction or uneven lamp wear, which makes it difficult to find a defect.
Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the inverter power elements. Upon completion of the diagnosis, all regular protection circuits should be restored.
Repair or diagnostics of the PC BOARD ASSY, PE0424A2, FRONT AV 75008775 motherboard must be started by checking the power conditioners. If necessary, you should update the software (software). In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, it may sometimes be necessary to replace its chips TA8246AHQ, MSP4410K 07, T5CB5-6UK1, CD4052B, R4580I, FLI8548H-LF, CXB1444R, HY50U281622FTP-4, 39VF3201, PE041515 V043215, PE041515 other possible defective components.
If you suspect a malfunction of the ENG37E01GF tuner, first of all, you need to make sure that the voltage of the varicaps (30-33V) is on the corresponding output of the tuner, as well as other voltage supplying it.
Owners and users of the TOSHIBA 32C3006PR TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!


SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    Toshiba 32C3006P Service manual and schematic diagram  



The appearance of MainBoard PE0424 is shown in the figure below:
PE0424
PE0424 can be used in TVs:
TOSHIBA 32C3006PR (Panel LCD PANEL AX080E002B 75007870), TOSHIBA 32C3500PR (Panel AX080E002B), TOSHIBA 37C3500PR (Panel LC370WX4 (SL)(C1)), TOSHIBA 42C3500PR (Panel LC420WX8-SLC1 75009814).
Main features of the TOSHIBA 32C3006PR device:
Installed matrix (LCD panel) LCD PANEL, AX080E002B 75007870 or LCD PANEL, G7LPL32SLA1, LC320W01-SLA1.
The matrix control uses the Timing Controller (T-CON) 6870C-0142B (2L).
To power the backlight, an inverter 75012523 is used, it is controlled by the BD9897, LM2901, LM2904 PWM controller. A transformer 700HK is installed in the inverter converter. As power elements of the inverter, keys of the type 1H335D are used.
The necessary supply voltages for all nodes of the TOSHIBA 32C3006PR TV are generated by the PE0391A1 power module or its analogs using the STR-Z2467, STR-W6765, CE-1059 microcircuits and power switches of the F 1H415H type.
MainBoard - the main board (motherboard) is a PE0424 module, using chips TA8246AHQ, MSP4410K 07, T5CB5-6UK1, CD4052B, R4580I, FLI8548H-LF, CXB1444R, HY50U281622FTP-4, 39VF3201 and others.
The ENG37E01GF tuner provides television reception and channel tuning.
Information from an alternative source:
Toshiba 32C3006PR
Motherboard: PE0424, TA8246AHQ, Tuner: ENG37E01GF,
T-con: PE0415, FLI8548H-LF, CXB1444R, HY50U281622FTP-4 x2, 39VF3201,
Invertor: HIU-813M, BD9897FS, LM2901, LM2904
Invertor: HIU-813S, BD9897FS
PSU: PE0391, STR-Z2467, STR-W6765,
PSU: PE0392 Inverter Circuit

TOSHIBA 32C3006PR LCD TV with AX080E002B LCD display, 32 "(81 cm) diagonal size in 16: 9 format. The ratio of maximum brightness to minimum (contrast) is 950: 1. Dynamic contrast 4800: 1 is achieved by special control of the backlight. Possible viewing 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 digital signal generation takes place in standard mouths 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the sound speaker system 20 W (2x10 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x3, component, SCART x2, RGB, VGA, HDMI x2. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024.
The power consumed by the TV in the operating mode from the network is 146 watts.
Overall dimensions: with stand 800x592x284 mm, without stand 800x545x118 mm.
TV Weight: with stand: 16.7 kg, without stand: 14.8 kg.
Attention! The TOSHIBA 32C3006PR LCD TV panel AX080E002B is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!