Tp.ms3458.pc757 Service Manual

If you’re repairing a modern LED TV, chances are you’ve run into the TP.MS3458.PC757 main board. This board is commonly found in budget to mid-range TVs from brands like Hisense, Element, RCA, Sanyo, and many white-label models.

Having the correct service manual for the TP.MS3458.PC757 isn’t just helpful—it’s essential. Without it, tracing power distribution, finding test points, or identifying components becomes a guessing game.

In this post, I’ll explain:

Maps every IC, resistor, capacitor, and test point. Saves hours when troubleshooting a dead board.

Lists expected voltages at key test points in both standby and power‑on states. Example: tp.ms3458.pc757 service manual

| Test Point | Standby (V) | Power On (V) | |------------|-------------|---------------| | +12V_IN | 0 | 12.0 | | +5V_STB | 5.0 | 5.0 | | VDD_CORE | 0 | 1.2 | | DDR_VDD | 0 | 1.5 |

These boards appear in brands such as Sceptre, Element, Westinghouse, Philips (some budget models), Hisense, TCL, Insignia, and various generic “Orion” or “ProScan” TVs. If you’re repairing a modern LED TV, chances

Before searching extensively for the manual, note these frequent issues with MS3458-based boards:

| Symptom | Likely Cause | Quick Check | |--------|-------------|--------------| | No power, no LED | Blown fuse on mainboard or faulty standby regulator | Check F1 or F2 (surface mount fuse near DC jack). Test U1 or U2 (3.3V regulator). | | Power LED on, but no backlight | Backlight enable signal missing or bad LED driver | Check BL_EN pin (usually 3-5V). Try adjusting backlight in service menu. | | White screen / vertical lines | LVDS cable loose or panel mismatch | Reseat LVDS cable. Verify panel voltage jumper matches your screen (3.3V/5V/12V). | | Boot loop / stuck logo | Corrupted firmware | Download correct firmware (must match board and panel) and reflash via USB. | | Remote or buttons not working | IR sensor or button board voltage missing | Check 3.3V on IR board connector. Test button resistors. | Maps every IC, resistor, capacitor, and test point