SONY
Model: KDL-20G2000
Chassis / Version: SE-1
Panel: CLAA201VA07
Inverter (backlight): 6N MXB06016 1-789-673-11 1A PWB-IN55194T / B3-E-LF
PWM Inverter: BD9884FV (28H) PL TBZB691
MOSFET Inverter: 4614 BD6E54 BDBD6E4U
Power Supply (PSU): 1-870-910-12 PSU & AUDIO + Adapter AC-FD008 18V 6A
PWM Power: TDA7495S, BD9701 (PWM Step-down)
MOSFET Power: AA6SA. AA6SC
MainBoard: 1-870-897-12 E7003252B Y30081312, 8-597590-00 BTPHC401Z
IC MainBoard: UPD61123F1-100-KA3-A MPEG VCT6973G 24C32 CXD1968R
Technical Specifications KDL-20G2000
SONY KDL-20G2000
General recommendations for repairing TV LCD
Repair of electronic equipment usually begins with an external inspection of the device and diagnosis of the malfunction. In this case, you should visually carefully examine all the elements of the SONY KDL-20G2000 TV, both internal and external. Visible damage to elements can sometimes suggest further directions for finding a defect before starting the necessary measurements. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a hint in the assumptions about the causes and consequences of the malfunction.
In the case when the KDL-20G2000 does not turn on, does not respond to the remote control and the front panel buttons, does not blink bulbs and does not show any signs of operability, most likely in this case the power adapter AC-FD008 18v 6a, 1-870-910- is faulty 12 PSU & AUDIO. The diagnostics of the power supply should always be started by checking the fuse and, if it is broken, the first thing to do is to check the rectifier bridge diodes and the AA6SA power switch. AA6SC for the probability of an avalanche or thermal breakdown.
The reasons for the breakdown of the power switch of the flyback converter of the power supply module can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the TDA7495S, BD9701 PWM controller chip or broken resistors in its bundle.
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-20G2000 does not have an image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Diagnosis and repair of the inverter is often complicated by the organization of special protection circuits, which is necessary for fire safety and turns off the inverter in any emergency situation, for example, when the lamps are worn or depressurized. Often, to localize a defect, its blocking is required.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Motherboard 1-870-897-12 E7003252B Y30081312, 8-597590-00 BTPHC401Z 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 power supply circuits of the microcircuits are working, a software update may be necessary. When repairing an MB board, you must check its components UPD61123F1-100-KA3-A MPEG VCT6973G 24C32 CXD1968R. Defective items should be replaced.
We recommend the owners of the KDL-20G2000 TV for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Service manual / schematic diagram -------------> Sony KDL-15G2000, KDL-20G2000 CHASSIS SE-1
The appearance of MainBoard 1-870-897-12 is shown in the figure below:1-870-897-12
The appearance of the power supply
Main features of the device SONY KDL-20G2000:
Installed matrix (LCD panel) CLAA201VA07.
To power the backlight, an inverter 6N is used, it is controlled by the BD9884FV PWM controller (28n) pl TBZB691. As power elements of the inverter, keys of type 4614 BD6E54 BDBD6E4U are used.
To power all internal components of the SONY KDL-20G2000 TV, an external source of type 1-870-910-12 PSU & AUDIO + Adapter AC-FD008 18V 6A is used using TDA7495S, BD9701 (PWM Step-down) microcircuits and AA6SA type power switches. AA6SC.
MainBoard - the main board (motherboard) is a module 1-870-897-12, using chips UPD61123F1-100-KA3-A MPEG VCT6973G 24C32 CXD1968R and others.
Information from an alternative source:
SONY KDL-20G2000 chassis SE-1
Panel Type (Matrix): CLAA201VA07,
Motherboard: 1-870-897-12, VCT 6773G B3 802, 24C32WP, EDD1216AATA-6B-E, D61123F1 100, HY27US08281A, CXD1968R,
Invertor: IV55194 / T-LF (1-789-673-11), BD9884FV, BD6E54 x2 pcs., BDBD6E4U x2, TBZB691 x6, TUNER & SCART: 1-870-681-11, Tuner: 8-597590-00 BTPHC401Z, PSU & AUDIO: 1-870-910-12, TDA7495S, 1CY103, BD9701, POVER: AC-FD008 External, 18V 6.11A,,
Additional technical information about the panel:
Brand: CPT
Model: CLAA201VA07C
Type: a-Si TFT-LCD, Panel
Diagonal size: 20.1 inch
Resolution: 640x480, VGA
Display Mode: TN, Normally White, Transmissive
Active Area: 408x306 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 500: 1
Display Colors: 16.2M (6-bit + FRC)
Response Time: 3/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 6 pcs CCFL
Signal Interface: TTL (1 ch, 8-bit), 50 pins
Voltage: 5.0V
