Technical description and composition of the PHILIPS 22PFL2807H TV, type of panel and applicable modules. The composition of the modules.PHILIPS LED
Model: 22PFL2807H / 60
Chassis / Version: VES1.1E LA
Panel: LM215WF4 (TL) (G1)
LED driver (backlight): integrated into PSU
PWM LED driver: MP3394
Power Supply (PSU): 17IPS61-2
PWM Power: ICE3BR0665J (Standby)
MainBoard: 17MB62-2.6
IC MainBoard: RT8293AH (8), NCP3503 (8), RT7297AH (8)
Technical Specifications 22PFL2807H
PHILIPS 22PFL2807H
General repair guidelines for TV LCD LED
It is advisable to start the repair of the PHILIPS 22PFL2807H / 60 TV with a careful external examination of both internal and external elements. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
In the case when the 22PFL2807H does not turn on, does not respond to the remote control and buttons on the front panel, does not blink lights and does not show any signs of operability, the power supply module 17IPS61-2 is probably faulty in this case. If it is serviceable with such manifestations, it is necessary to check the power supply stabilizer (converter) of the processor on the motherboard. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller ICE3BR0685J (8), which can be checked only by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the PHILIPS 22PFL2807H does not have an image but has sound, the backlight LEDs of the LM215WF4 (TL) (G1) panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
The motherboard 17MB62-2.6 must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up constantly. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements RT8293AH (8), NCP3503 (8), RT7297AH (8) requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
Once again, remind users! Attempts to self-repair a PHILIPS 22PFL2807H TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual and schematic diagram 22PFL2807H/60 Chassis VES1.1E LA
MODELS: 19PFL2908H, 22PFL2807H, 22PFL2908H, 24HFL2808D, 24PFL2908H, 26HFL2808D, 26PFL2908H, 32PFL2807H.
PSU SCHEMATIC MANUAL -------------> 17IPS61-2.
To reduce the backlight current in LED drivers with the MP3394S (MP3394) controller, increase the resistance of the resistor from pin 6 (ISET) to the chassis. The maximum current in each channel (in milliamperes) for the Rset resistor (in kilo-ohms) is determined from the ratio 790 * 1.23V / (Rset + 0.4).
The appearance of the MainBoard 17MB62-2.6 is shown in the figure below:
The 17MB62-2.6 motherboard is made using the MSD9WB9PT-2 processor, combined with a scaler. For its operation, random-access memory (DDR) K4T1G164QF, or HY5PS121621C, and NAND512-A read-only memory (ROM) are used. To ensure processor power, DC / DC converters with output voltages of 1.2V, 2.5V, 3.3V are used. For DDR, the voltage is 1.8V, for NAND it is either 1.8 or 3.3V. It is advisable to start the repair by checking the supply voltage in stand-by mode (12V), 5V and 3.3V. Further, in the operating mode, it is necessary to check the operability of all linear stabilizers and DC / DC voltage converters used to power the MB and LCD panel chips. If there is a backlight and no image, depending on the type of panel used, its 5V or 12V power supply can be measured directly on the LVDS connector.
A typical malfunction of this board is a NAND software failure. In this case, the TV does not turn on and blinks alternately with indicators on the panel. If the software of the SPI FLASH chip, in which the bootloader is located, is not damaged, NAND is updated via the USB port with standard software. Otherwise, it makes sense to try downloading the software if there is a mboot.bin file on the media, which can be used as standard SPI FLASH content.
17MB62-2.6 can be used in TVs:
PHILIPS 19PFL2908H/60 (Panel HT185WX1-300), PHILIPS 22PFL2807H/60 (Panel LM215WF4 (TL)(G1)), PHILIPS 24PFL2908H/60 (Panel V236BJ1-LE1 Rev.C2), PHILIPS 22PFL2908H/60 (Panel M215HGE-L21 ), SHARP LC-22LE240RUX (Panel 22 ), SHARP LC-40LE240RUX (Panel LTA400HM13 C04), SHARP LC-32LE140RU LC-32LE140 (Panel LC320EXN), TOSHIBA 23KL934R (Panel LTM230HT10 75029655), TOSHIBA 32KL934R (Panel LTA320AN12 T01).
The appearance of the power supply
Main features of the PHILIPS 22PFL2807H device:
Installed matrix (LED-panel) LM215WF4 (TL) (G1).
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the MP3394 PWM controller.
The necessary supply voltages for all nodes of the PHILIPS 22PFL2807H TV are generated by the 17IPS61-2 power module or its analogs using ICE3BR0665J (Standby) microcircuits.
MainBoard - the main board (motherboard) is a 17MB62-2.6 module, using RT8293AH (8), NCP3503 (8), RT7297AH (8) and others.
Additional technical information about the panel:
Brand: LG Display
Model: LM215WF4-TLG1
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.5 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 476.064x267.786 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 14S2P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
LG PANEL V236BJ1-LE1 DATASHEET PINOUT
PANEL VOLTAGE - 12V
PANEL RESOLUTION - 1366H 768V
BIT - 8
V236BJ1-LE1
PIN NO DESCRIPTION
1 VCC 12V
2 VCC 12V
3 VCC 12V
4 VCC 12V
5 GND
6 GND
7 GND
8 NC
9 SELECT LVDS
10 NC
11 GND
12 RX0-
13 RX0+
14 GND
15 RX1-
16 RX1+
17 GND
18 RX2-
19 RX2+
20 GND
21 RXCLK-
22 RXCLK+
23 GND
24 RX3-
25 RX3+
26 GND
27 NC
28 NC
29 NC
30 GND
