Technical description and composition of the PHILIPS 23PF9945 TV, type of panel and applicable modules. The composition of the modules.PHILIPS
Model: 23PF9945 / 12
Chassis / Version: LC03E AA
Panel: LC230W01 (A2) (K8)
T-CON: 6870S-0068G Not removable, KZ4E12268L
Inverter (backlight): LC230W01-A2
PWM Inverter: BIT3106, A393F
MOSFET Inverter: 4532GM
Trans Inverter: XT-12200-2222R4
Power Supply (PSU): Adapter + 24V 5A
MainBoard: 3139-123-5680.5 V2 WK338.5 WK317.5 TDA8858H, TDA9118T, SAA5867HL / M1 / 1369
IC MainBoard: FLI2300, TSC80251G2D-L16CB, 24C16, 34063AP, THC63LVDM83R, LVC373A, AN5277,
Tuner: UR1316 / A I H-3
Control: RC-19042008/01
Specifications 23PF9945
PHILIPS 23PF9945
General recommendations for repairing TV LCD
Repair of all electronic devices, including the PHILIPS 23PF9945 / 12 TV, it is advisable to start with an external examination of its external and internal elements. You should also pay attention to the condition of the case elements, connectors, cords, loops and buttons. Sometimes, based on visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting even before the necessary measurements are taken. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
Sometimes the PHILIPS 23PF9945 / 12 TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the common power supply module External, + 24V, 5A. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should always be started by checking the fuse and, if it is broken, it is first necessary to check the rectifier bridge diodes and the power switch for the possibility of an avalanche or thermal breakdown.
As a rule, the keys of flyback converters, which use an N-Fet field effect transistor on a separate radiator, or integrated with a PWM controller in a single chip, are reliable enough and rarely fail for no reason. The reasons for the breakdown of the key should be sought by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the inverter should be checked.
In most cases, the diagnosis and repair of the LC230W01-A2 inverter is difficult due to the organization of protection, which turns it off in emergency cases to avoid fires during short circuits or breaks in high-voltage circuits and during depressurization of lamps. Often, repairmen block the protection circuits in order to make the necessary measurements at the control points of the inverter to identify the causes of the defect.
In such cases, the risk of failure of the power elements of the inverter is most likely, and special care is required during work, and after their completion, it is necessary to restore the protection circuit for further safe operation of the TV by the owner in normal mode.
Repair or diagnostics of the motherboard 3139 123 5680.5 V2 should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing elements FLI2300, TSC80251G2D-L16CB, 24C16, 34063AP, THC63LVDM83R, LVC373A, AN5277, TUNER UR1316 / A I H-3 requires the necessary training and professional skills in repairing modules at the component level.
Attention to users! Self-repair of a PHILIPS 23PF9945 / 12 TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service manual and schematic diagram 23PF9945/12 Chassis LC03E AA
MODELS 15PF9936, 17PF9945, 23PF9945
The appearance of MainBoard 3139-123-5680.5 is shown in the figure below:3139-123-5680.5
Main features of the PHILIPS 23PF9945 device:
Installed matrix (LCD panel) LC230W01 (A2) (K8).
The matrix control uses the Timing Controller (T-CON) 6870S-0068G.
An LC230W01-A2 inverter is used to power the backlight, it is controlled by a BIT3106, A393F PWM controller. The transformer XT-12200-2222R4 is installed in the inverter converter. As power elements of the inverter, keys of type 4532GM are used.
To power all the internal nodes of the PHILIPS 23PF9945 TV, an external adapter + 24V 5A type source is used.
MainBoard - the main board (motherboard) is a module 3139-123-5680.5, using chips FLI2300, TSC80251G2D-L16CB, 24C16, 34063AP, THC63LVDM83R, LVC373A, AN5277, and others.
The tuner UR1316 / A I H-3 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC230W01-A2K8
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.0 inch
Resolution: 1280x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 501.12x300.67 mm
