Technical description and composition of the SONY KDL-32R303C TV, panel type and applicable modules. The composition of the modules.SONY LED
Model: KDL-32R303C
Panel: IS4S320DND11
LED backlight: 3228 8 LEDs REV1.2, 1-893-801-11 (173522511)
T-CON: 320KSB_S2LV0.3 (LSY320AN02-101)
LED driver (backlight): integrated into MainBoard
Power Supply (PSU): ACDP-045S02 Adapter 19.5V 2.35A
MainBoard: 1-894-867-11 - 173568511 BE2
IC MainBoard: Mediatek MT5565 CQYG
Tuner: DE241TP
Control: RM-ED062, IR: 1-893-522-11 (173510611)
Technical Specifications KDL-32R303C
SONY KDL-32R303C
General repair guidelines for TV LCD LED
Possible manifestations of defects
- SONY KDL-32R303C does not turn on at all and does not show any signs of operability. Does not blink indicators and does not respond to control buttons.
Typically, with such manifestations, the defect is caused by faulty elements in the ACDP-045S02 main power module.
The owner of a TV can purchase an external power supply unit such as ACDP-045S02 and repairing it is not always advisable. In any case, the simplest typical defects characteristic of most IIP schemes can be easily detected and eliminated after opening. It is necessary to measure its secondary output voltages, and in case of their absence, check the serviceability of the power switches 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 the excess of maximum current or voltage values. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM). It is checked only by replacement with a known good one.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, it does not respond to the remote control.
Repair or diagnostics of the motherboard 1-894-867-11 should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). When repairing an MB board, you need to check its components Mediatek MT5565 CQYG. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
If you suspect a malfunction of the DE241TP tuner, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary voltage levels and pulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Once again, remind users! Attempts to self-repair a TV SONY KDL-32R303C without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
The appearance of MainBoard 1-894-867-11 is shown in the figure below:1-894-867-11
1-894-867-11 can be used in TVs:
SONY KDL-32R303C (Panel IS4S320DND11), SONY KDL-40R353C (Panel NS4S400DND11).
The appearance of the power supply
Main features of the device SONY KDL-32R303C:
Installed matrix (LED panel) IS4S320DND11.
The matrix control uses the Timing Controller (T-CON) 320KSB_S2LV0.3.
To power the backlight LEDs, a converter is used, combined with the main board 1-894-867-11.
To power all the internal components of the SONY KDL-32R303C TV, an external source such as ACDP-045S02 Adapter 19.5V 2.35A is used.
MainBoard - the main board (motherboard) is a module 1-894-867-11, using the Mediatek MT5565 CQYG chips and others.
The DE241TP tuner provides TV reception and channel tuning.