Technical description and composition of the TV SONY KDL-32EX700, type of panel and applicable modules. The composition of the modules.SONY LED
Model: KDL-32EX700
Chassis / Version: AZ1-L
Panel: T315HW07 V.1 // LK315D3LA4S
LED driver (backlight): integrated into PSU
PWM LED driver: LV5768M
MOSFET LED driver: TPC8119
Power Supply (PSU): 1-881-956-11 GE3
PWM Power: MIP2H2, CXA3809M, NJM2904M
MOSFET Power: TK8A50D
MainBoard: 1-881-636-22
IC MainBoard: EMMA3TL2, MC10161F1, M24C32, MB91F313A, SiI9287B, TAS5707, A22410, CXA3803R, LC245
Tuner: SUT-AE101T
Technical Specifications KDL-32EX700
SONY KDL-32EX700
General repair guidelines for TV LCD LED
Possible malfunctions
- SONY KDL-32EX700 does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
With such manifestations, a malfunction is most likely to be detected in the power module 1-881-956-11. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches (TK8A50D) and rectifier diodes for a possible partial or complete breakdown.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power 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. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) MIP2H2, CXA3809M, NJM2904M, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it reacts to the remote control, channels are switched. In some cases, the image appears when you turn on and immediately disappears.
The most likely in these cases is a malfunction of the LED backlight. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 1-881-636-22 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). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - MC10161F1-420 - NEC, MB91F313A, SiI9287B, TAS5707, A22410, CXA3803R, LC245. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
Before replacing the SUT-AE101T tuner, if there is no tuning to the channels, you must 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
Owners and users of the SONY KDL-32EX700 TV should 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!
Service manual / schematic diagram -------------------> SONY KDL-32EX700 Chassis AZ1-L AND models KDL-40EX700, KDL-40EX703, KDL-46EX700, KDL-46EX701, KDL-46EX703, KDL-52EX700, KDL-52EX701, KDL-52EX703, KDL-60EX700, KDL-60EX701, KDL-60EX703
The appearance of MainBoard 1-881-636-22 is shown in the figure below:1-881-636-22
1-881-636-22 can be used in TVs:
SONY KDL-52EX700 (Panel LK520D3LB1S), SONY KDL-32EX700 (Panel T315HW07 V.1).
The appearance of the power supply
Main features of the device SONY KDL-32EX700:
Installed matrix (LED-panel) T315HW07 V.1 or LK315D3LA4S.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the LV5768M PWM controller. As power elements of the LED driver, keys of the TPC8119 type are used.
The necessary supply voltages for all nodes of the SONY KDL-32EX700 TV are generated by the power module 1-881-956-11, or its analogs using microchips MIP2H2, CXA3809M, NJM2904M and power switches of the type TK8A50D.
MainBoard - the main board (motherboard) is a module 1-881-636-22, using microcircuits EMMA3TL2, MC10161F1, M24C32, MB91F313A, SiI9287B, TAS5707, A22410, CXA3803R, LC245 and others.
The SUT-AE101T tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T315HW07 V1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 72%
Response Time: 5.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
