Technical description and composition of the HAIER L32A8A TV, type of panel and applicable modules. The composition of the modules.Haier
Model: L32A8A
Chassis / Version: PY12026
Panel: T315XW01 V.5
T-CON: T260XW02 V2 Ctrl AUO-016K1
Inverter (backlight): 4H.V1448.291 / B1 DARFON
PWM Inverter: OZ964SN
MOSFET Inverter: P2804BDG
Power Supply (PSU): PSM210-417-R
PWM Power: L6562, NCP1377B
MainBoard: PY12026-Q (V2.1)
IC MainBoard: MST6151DA-LF, IS42S32200C1-6TL, LM2596S, LV1116N, TDA1554Q
Tuner: JS-6H1 / 111A25HR
Control: HYF-35G
Specifications
HAIER L32A8A
General recommendations for repairing TV LCD
Possible malfunctions
- The Haier L32A8A TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
Typically, with such manifestations, the defect is caused by faulty elements in the PSM210-417-R power supply module. It is necessary to measure the secondary output voltage, 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 short circuit in the elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM chip L6562, NCP1377B can also cause a malfunction of the power switch of the converter and is checked by replacement.
- 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.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should 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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the PY12026-Q motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - MST6151DA-LF, IS42S32200C1-6TL, LM2596S, LV1116N, TDA1554Q and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
If the TV works normally from external devices, but does not tune into television channels, the tuner JS-6H1 / 111A25HR 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, remind users! Attempts to self-repair a Haier L32A8A TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard PY12026-Q is shown in the figure below:PY12026-Q
PY12026-Q can be used in TVs:
Haier L32A8A (Panel T315XW01 V.5), Haier L37A9A L37A9A-AK (Panel LC370WX1 (SL)(02)).
The appearance of the power supply
Main features of the HAIER L32A8A device:
Installed matrix (LCD panel) T315XW01 V.5.
The matrix control uses the Timing Controller (T-CON) T260XW02.
To power the backlight, an inverter 4H.V1448.291 is used, controlled by the PWM controller OZ964SN. As power elements of the inverter, keys of the type P2804BDG are used.
The necessary supply voltages for all nodes of the TV HAIER L32A8A are generated by the PSM210-417-R power supply module or its analogs using L6562, NCP1377B microcircuits.
MainBoard - the main board (motherboard) is a PY12026-Q module, using microchips MST6151DA-LF, IS42S32200C1-6TL, LM2596S, LV1116N, TDA1554Q and others.
The JS-6H1 / 111A25HR tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T315XW01 V5A
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 15/5 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
Screen Type: TFT active maxrix 32 inch
Viewable angle: 176(H)/176 (V)
Wide view-angle display, high contrast
Nicam, Teletext, HDMI, Double scarts
1. Antenna input
2. Earphone output
3. SCART2 input
4. SCART1 input
5. S-VIDEO input
6. YPbPr input
7. VGA audio input interface
8. VGA input
9. HDMI input
10.Power input socket
Color system: PAL, SECAM, NTSC (AV)
Sound system: BG, DK, I, L, LL
Composite: 480i/p, 576i, 720p,1080i,1080p
Mode VGA,SVGA, XGA
Resolution: 640x480, 800x600, 1024x768
Dimension: 81.3cm x 24.6cm x 61.9cm