Ticon NEMUS-02 T-CON Board Voltage Points for TCL, Vestel, LCD/LED TV Faults

User question

Ticon NEMUS 02
Voltage points

Artificial Intelligence Response

Direct answer to the question

• “Ticon NEMUS 02” is almost certainly a T-CON (Timing-Controller) board whose PCB code is NEMUS-02 and is used in several 32- to 43-inch LCD/LED television panels.
• The board carries the usual T-CON supply rails: VIN / VCC (5 – 12 V), AVDD (10 – 16 V), VGH (+22 – 32 V), VGL (-5 – -12 V), VCOM (≈ ½ AVDD), core rails (1.2 V / 1.8 V / 3.3 V) and a bank of γ-reference voltages (V1…V18).
• All those rails have labelled test pads or through-hole vias on the NEMUS-02 PCB; measuring them with a high-impedance multimeter referenced to the board ground (shield frame or any GND pad) will quickly reveal whether the T-CON is powered and regulating correctly.

Detailed problem analysis

1. What a T-CON does
   • Translates LVDS/eDP from the Main Board into the hundreds of column and row waveforms needed by the TFT glass.
   • Generates several high- and low-voltage rails on-board because the panel needs far more than the 5 / 12 V it receives.

2. Power-tree of a typical NEMUS-02
   (Measured on a TCL-/Vestel-branded NEMUS-02, 12 V input.)

   Rail / pad silk	Normal value	Function	How it is generated	Fault symptom if missing
   VIN, VCC12	12 V ±5 %	Raw supply from PSU	Arrives through F1 fuse	Entire board dead
   VCC5	5.0 V ±3 %	Logic/LDO feeder	Buck from VIN	Logic dead, no LVDS clock
   VCC3V3	3.3 V ±3 %	LVDS receiver, EEPROM	LDO from 5 V	White or black screen
   VDD12 / VCORE	1.2 V / 1.8 V	T-CON ASIC core	Analog PMIC	Random lines, reboot loop
   AVDD	13 – 16 V	Source-driver analogue	Boost + charge pump	Very dim/no picture
   VGH	+25 … 30 V	TFT gate “ON” level	Tripler pump	Vertical bright/dark bars
   VGL	–6 … –10 V	TFT gate “OFF” level	Inverting pump	Flicker, stuck lines
   VCOM	~6 – 8 V	Common electrode	Op-amp buffer	Clouding / frame flash
   V1…V18 (γ)	Stepped ½ – AVDD	Gamma ladder	Resistor ladder & op-amps	Posterised image

3. Locating the pads
   • Pads are silkscreened “TP_VGH”, “TP_VGL”, “TP_AVDD”, etc.
   • If silk is missing, follow the flex-cable fingers: the group of thick traces is usually VGH, the slimmest pair is VGL.
   • F1 (tiny 0603 fuse) is your first check – open fuse → no voltages at all.

4. Typical measurement workflow
   a. TV in standby → you should still see VIN (5 V or 12 V) but pumps are off.
   b. TV powered ON → verify VIN, then 5 V, 3.3 V. If OK, pumps should start after 10-50 ms: AVDD, VGH, VGL rise together.
   c. Check ripple with scope: <50 mVp-p on AVDD, <200 mVp-p on VGH/VGL. Excess ripple means dried capacitors (C4xx series).

5. Common fault patterns
   • Only VIN present ⇒ blown F1, short on 5 V buck, or shorted MLCC at LVDS connector.
   • AVDD low (<10 V) and VGH/VGL absent ⇒ pump IC (usually RT8288/BD8175 or TPS65162) not enabled – check its EN pin and its 3 V logic rail.
   • Correct rails but white screen ⇒ LVDS data not reaching T-CON (main board, LVDS cable, or ASIC BGA).
   • Picture with vertical coloured lines ⇒ open VCOM trace on COF (chip-on-film) or cracked γ-resistors.

Current information and trends

• Newer 4K panels integrate the T-CON into the COF (so-called “single-COG”); discrete NEMUS-02-style boards are still common in FHD sets up to 43 in.
• Integrated PMICs such as TPS65185 provide digitally adjustable VGH/VGL, allowing the TV firmware to compensate ageing.
• Fault-log capable T-CONs (e.g., Realtek RTD2851 series) expose I²C error counts; pairing a low-cost USB-I²C stick lets you read them for deeper diagnostics.

Supporting explanations and details

• AVDD, VGH and VGL are high-impedance rails: a single shorted 0402 capacitor (often C407/C431) instantly drags them down and the boost IC will shut off.
• VCOM is half of AVDD by design: it biases the entire active matrix so that positive and negative excursions average to zero, minimising flicker.
• γ-reference ladder: 18 evenly spaced steps create the analogue grey-scale. If one step drops out you get a horizontal band with shifted brightness.

Ethical and legal aspects

• The T-CON is on the “cold” side of the SMPS; shock hazard is low, but ESD can kill the ASIC. Wear a wrist strap.
• Do not bridge the fuse with wire for a “quick test” – you risk burning the panel COF, which is irreparable.
• Service manuals for many TV brands are copyrighted; share only excerpts that are necessary for repair.

Practical guidelines

• Use a 10 MΩ DMM; cheap 1 MΩ meters load VCOM enough to alter the picture.
• If you must power the T-CON on the bench, feed 12 V via a lab supply, jumper its PWR-ON pin to 3.3 V, and load AVDD with 1 kΩ to give the boost IC minimum load.
• Keep measurement leads short; VGH ringing can exceed 35 V peak and couple into HDMI lines causing artefacts.

Disclaimers / additional notes

• Exact voltages vary ±10 % among manufacturers; always compare to silk or sticker on the panel (e.g., “VGH = +29 V, VGL = –8.5 V”).
• If your board is not an LCD T-CON but really a different device (medical NeMus 2, O₂-sensor controller, etc.), please supply the product photo or part number – voltages will differ.

Suggestions for further research

• Look up the pump IC part number on the NEMUS-02 (RT, BD, TI, or Alpha & Omega). Its datasheet gives the exact nominal rails.
• Search panel code (e.g., “HV320WX2-100”) together with “gamma voltages” – many repair forums publish full tables.
• Study TI app note SLVA526 for an in-depth explanation of VGH/VGL/AVDD generation.

Brief summary

NEMUS-02 is a discrete T-CON board found in several mid-size LCD TVs. The vital voltage points are VIN, 5 V, 3 .3 V, AVDD (~15 V), VGH (+25 ~ 30 V), VGL (-6 ~ -10 V), VCOM (~AVDD/2) and the γ-ladder. All have labelled pads; checking them in the order “VIN → logic rails → pump rails” will isolate most faults. If your context differs (medical, automotive), provide additional details so the voltage map can be adjusted accordingly.

Disclaimer: The responses provided by artificial intelligence (language model) may be inaccurate and misleading. Elektroda is not responsible for the accuracy, reliability, or completeness of the presented information. All responses should be verified by the user.