Technical description and composition of the SONY KDL-37V5500 TV, panel type and applicable modules. The composition of the modules.SONY
Model: KDL-37V5500
Chassis / Version: EX2L Coriander
Panel: T370HW02 V.B.
Inverter (backlight): VIT71865.50 LOGAN Rev3
PWM Inverter: OZ964GN
MOSFET Inverter: P2504BDG
Power Supply (PSU): 3H267W-1 - PSC10270D M G4
PWM Power: SSC9503 (16), A6079M (Standby)
MainBoard: 1-878-942-22 - A-1663-964-B - I1702985B BA board
IC MainBoard: MC10147F1 410, MB91F313A, NAND Flash: K9F1208UOC, EEPROM: 24c32
Tuner: BTD-HF422T 8-597-700-00
Control: RM-ED016 148722811
Technical Specifications KDL-37V5500
SONY KDL-37V5500
General recommendations for repairing TV LCD
It is advisable to start the repair and diagnostics of the SONY KDL-37V5500 TV with a careful external examination of the internal and external elements, including case parts, a display, buttons, and cables. In some cases, visible external damage to the elements can suggest directions for troubleshooting and localizing the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
Faults in the G4 3H267W-1 PSC10270D M power supply module can be expressed in different ways, for example, the SONY KDL-37V5500 does not turn on at all and the control lamps on its front panel do not light up and do not blink, and there are no signs of operability. When diagnosing and repairing the G4 3H267W-1 PSC10270D M power supply unit, it is first necessary to check the fuse, and if it breaks, the power switch and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail for no reason, which should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller SSC9503 (16) A6079M dezh (7), which You can check only by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
It is somewhat more difficult to look for a malfunction in the converter of the power module with an active KKM (power factor corrector).
If the SONY KDL-37V5500 TV does not have an image, but there is sound, the malfunction should be sought in the power converter of the backlight (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for an overstated ESR.
Repair of the VIT865.50 inverter can often be somewhat complicated by the use of special protection circuits, which are designed to disconnect it in emergency cases for fire safety when the lamps are depressurized, or short circuits or breaks in high-voltage circuits and connections. Sometimes it becomes necessary for diagnostic purposes to block the protection circuits in order to be able to make the necessary measurements at the control points of the circuit.
It should be remembered that when the protection is turned off, there is always a risk of failure of the inverter power elements during diagnosis. After repair, it is necessary to restore all standard converter protection circuits.
The malfunction of the BTD-HF422T 8-597-700-00 tuner is established after checking the software and all the supply voltages at its terminals, including the varicap supply voltage (30-33V).
Owners and users of the SONY KDL-37V5500 TV must 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-32/37/40/46/52V5500 CHASSIS EX2L-Coriande
The appearance of MainBoard 1-878-942-22 is shown in the figure below:1-878-942-22
1-878-942-22 can be used in televisions:
SONY KDL-32W5500 (Panel T315XW02 V.1), SONY KDL-37V5500 (Panel T370HW02 V.B.), SONY KDL-40V5610 (Panel LTY400HA12), SONY KDL-40W5500 (Panel LTY400HF05), SONY KDL-40WE5 (Panel LTY400HF02 102), SONY KDL-46W5500 (Panel LTY460HF05), SONY KLV-46V550A (Panel T460HW03 V.2), SONY KDL-46W5740 (Panel LTY460HF05).
The appearance of the power supply
Main features of the device SONY KDL-37V5500:
Installed matrix (LCD panel) T370HW02 V.B ..
The VIT71865.50 inverter is used to power the backlight lamps, it is controlled by the OZ964GN PWM controller. As power elements of the inverter, keys of the type P2504BDG are used.
The necessary supply voltages for all nodes of the SONY KDL-37V5500 TV are generated by the 3H267W-1 power module or its analogs using SSC9503 (16), A6079M (Standby) microcircuits.
MainBoard - the main board (motherboard) is a module 1-878-942-22, using microchips MC10147F1 410, MB91F313A, NAND Flash: K9F1208UOC, EEPROM: 24c32 and others.
The BTD-HF422T 8-597-700-00 tuner provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T370HW02 VB
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 819.36x460.89 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 2500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V