Saturday 5 September 2020

REPAIRING / SERVICING TV PANASONIC TX-32ASR600

Technical description and composition of the PANASONIC TX-32ASR600 TV, panel type and modules used. The composition of the modules.
PANASONIC LED
Model: TX-32ASR600
Chassis / Version: TNPH1087
Panel: TPT315B5-DXJSFE REV: S1T
LED backlight: GJ-315-D508-V5
T-CON: 6870C-0442B
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9902CGN
Power Supply (PSU): 715G6386-P01-000-003H PLTVDL291XAP6
PWM Power: 2S110, NR111D
MOSFET Power: 10N65K3, F44P02
MainBoard: TNPH1087 1
IC MainBoard: CPU: MN2WS0275PBS, EEPROM 24C16RP, Flash TVR4G274-AG, 29F4G08ABAEA
Tuner: TDSA-G320D
Control: WLAN Module: DNUA-P7
TX-32ASR600 Specifications
PANASONIC TX-32ASR600
General recommendations for TV LCD LED repair
Possible manifestations of defects
- The PANASONIC TX-32ASR600 TV does not turn on and does not show any signs of operability at all. No response to the remote control and front panel control buttons.
Often in such cases, the power module 715G6386-P01-000-003H is faulty. Its output voltages should be measured and, in their absence, the serviceability of the power switches (10N65K3, F44P02) and rectifier diodes in the converters should be checked for possible breakdown.
In case of breakdowns in the secondary circuits of the converter, it can usually work in an emergency mode in a short-circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse or current sensor in the source of the key most often breaks off.
Breakdown of Mos-Fet switches used in switching power supplies is often caused by malfunctions of other elements, for example, in the power supply circuit of the PWM controller, in frequency setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) 2S110, NR111D are usually checked by replacing them with new ones, or knowingly working properly.
- There is no picture, there is sound, it reacts to the remote control, the channels are switched. In some cases, the image appears when turned on and disappears immediately.
Often in such cases, there is no backlighting of the LED panel. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
Repair or diagnostics of the TNPH1087 motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace the software (software). If it is not possible to replace the MB (SSB) board, you must check the serviceability of its elements - CPU: MN2WS0275PBS, EEPROM 24C16RP, Flash TVR4G274-AG, 29F4G08ABAEA. Defective components must be replaced.
If the TV operates normally from external devices, but does not tune into TV channels, the TDSA-G320D tuner may be faulty. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the reason for the inoperability of the tuner may be a software failure.

If the PANASONIC TX-32ASR600 has no image, but there is sound, the TPT315B5-DXJSFE display backlight often simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.
Replacing the LEDs requires disassembling the TPT315B5-DXJSFE LCD panel - a process that requires experience and qualifications from the master. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels
If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV you can see the light through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But often the main board MainBoard TNPH1087 turns out to be faulty, a software failure is also possible.
Then, first of all, it is necessary to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within the normal range, it is necessary to trace the passage of LVDS signals from the MainBoard TNPH1087 with an oscilloscope, as well as synchronization signals to the loops with drivers.
Flooded or unsuccessfully washed screens of LED-TVs can be restored, in about half of the cases, usually if significant damage has not formed in the cables and panel strips.

Owners and users of the PANASONIC TX-32ASR600 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!
  
DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>  ORDER No. PCZ1405129SE  for models    TX-32ASR600 TX-32ASR605


 The appearance of the MainBoard TNPH1087 is shown in the figure below:
TNPH1087
External view of the power supply
The main features of the PANASONIC TX-32ASR600 device:
Installed matrix (LED panel) TPT315B5-DXJSFE REV: S1T.
Matrix control uses the Timing Controller (T-CON) 6870C-0442B.
A converter combined with a power supply is used to power the backlight LEDs, it is controlled by the OZ9902CGN PWM controller.
The formation of the necessary supply voltages for all nodes of the PANASONIC TX-32ASR600 TV is carried out by the 715G6386-P01-000-003H power module, or its analogs using 2S110, NR111D microcircuits and power switches of the 10N65K3, F44P02 type.
MainBoard - the main board (motherboard) is a TNPH1087 module using CPU chips: MN2WS0275PBS, EEPROM 24C16RP, Flash TVR4G274-AG, 29F4G08ABAEA and others.
The TDSA-G320D tuner provides reception of television programs and tuning to channels.
Display technology: Panel type: TBD .. Format: 16:09. Clear Panel technology. Scanning backlight: 100Hz BLB. Viewing Angle: TBD ..
Image technologies: Supported media formats: AVI / MKV / WMV / MP4 / M4v / FLV / 3GPP / VRO / VOB / TS / PS, MP3 / AAC / WMA Pro / FLAC / WAV, JPEG.
Sound technologies: Surround mode: V-Audio. Acoustic Systems: Full Range x 2. Audio Return Channel (Input 2).
Sound modes: "Standard", "Music", "Speech", "User".
Picture Modes: Dynamic, Standard, Cinema, Immersive Cinema, Custom
Input and output connectors (wired interface): SCART: 1 (back). Component Input: RCA jack x 1 (rear). HDMI: HDMI 2 (back). USB: 1 (side; USB 2.0 x 1) Digital Audio Out (Optical) SD: 1 (Rear). Headphone jack: 1 (side).
TV PANASONIC TX-32ASR600 with LCD display TPT315B5-DXJSFE, diagonal size 32 "(81 cm) 16: 9 format. The technology of production of the screen of this TV model is realized with LED backlighting.
TPT315B5-DXJSFE panel and TNPH1087 firmware enable HD viewing at 1366x768 resolution for 720p (HD Ready) graphics.
The TX-32ASR600 is equipped with SMART software, built-in applications and the ability to work on the Internet. Internet connection can be made via Wi-Fi wireless connection. The input analog video signal can be processed in PAL, SECAM, NTSC systems. Graphic processing and formation of a digital signal picture occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i. Multimedia file formats supported by the video processor: MP3, WMA, MPEG4, MKV, JPEG.
The power of the acoustic audio system is 10 W (2x5 W) provided by two speakers. NICAM STEREO sound processing system is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, RGB, HDMI x2, USB, Ethernet (RJ-45), Wi-Fi. A headphone output is provided for individual listening. To connect a computer or laptop, a VGA (D-Sub 15) connector is used, which supports resolutions: 1360x768.
The digital tuner is capable of receiving terrestrial and cable channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Dimensions: with stand 733x505x184 mm, without stand 733x436x59 mm.
TV weight: with stand: 7 kg, without stand: 6.5 kg.
Attention! Panel TPT315B5-DXJSFE REV: S1T LED TV PANASONIC TX-32ASR600 is the most expensive item.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.