Question about Hitachi 50SBX70B 50" Rear Projection Television
I was watching it and it started making a crackly sound then justed went of what could be wrong with it. when i took the back of 5 lights light up then 2more then it turns off but wont turn on but the 120v green light dont come on.
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: hitachi 50sbx70b
This update covers to the following Hitachi
models and chassis
46UX50B/51K, 50UX52B/53K, 60UX54B/55K, 50SBX70B, 60SBX72B, 70SBX74B. All projection televisions using the AP73 & 74 chassis's From Dennis Viereck
Intermittent loss of Raster, On Screen Display, sometimes sound. BUT ALWAYS HAS HIGH VOLTAGE! Also removing power and reapplying it again restores operation.
THE PROBLEM: There is a lack of a secondary ground for the CRT Dag connected to each CRT board. You can identify this missing ground on the CRT board by locating two vacant pins on each CRT driver board near the CRT socket. The connector is named P801, P831, and P861 relative to each board. The pin nearest the socket is the ground pin in question. The pin furthest from the socket is connected to the cathode of the CRT.
OBJECTIVE: Run a separate ground wire from the "GROUND" pin on each CRT board to the chassis ground. You can use the circuit board mounting screw on the frame under the green CRT. See drawing below.
DIRECTIONS: Obtain 3 wires 10, 14, and 18 inches long. The wire is 18 gauge stranded with an insulated jacket. Attach one wire to each ground pin on the CRT socket. Choose the correct length of wire so that all wires will connect to the circuit board mounting screw near the center of the chassis frame.
EXPLANATION: The extra ground is needed if an internal arc occurs in the CRT. This energy must find a path to ground. Before, the only path to ground is through the signal ground wire on the RGB drive connector. This thin wire does not go directly to chassis ground and is inadequate ground for the CRT dag. If the energy level of the discharge is high enough it may corrupt the data flow on the data & clock lines or negatively effect the OSD microprocessor. Since electricity takes the shortest path to ground, the additional ground wire will route the majority of that static pulse to chassis ground quicker and reduce the possibility of corrupting operation of the OSD processor.
Posted on Jan 04, 2008
Tips for a great answer:
May 11, 2009 | Hitachi 50SBX70B 50" Rear Projection...
Dec 06, 2008 | Hitachi 43UWX10B 43" Rear Projection...
Jan 29, 2008 | Hitachi 50SBX70B 50" Rear Projection...
Jan 15, 2008 | Hitachi 50SBX70B 50" Rear Projection...
Nov 21, 2007 | Hitachi 50SBX70B 50" Rear Projection...
Nov 12, 2007 | Hitachi 50SBX70B 50" Rear Projection...
Nov 07, 2007 | Hitachi 50SBX70B 50" Rear Projection...
Sep 29, 2010 | Hitachi 50SBX70B 50" Rear Projection...
Dec 26, 2008 | Hitachi 50SBX70B 50" Rear Projection...
65 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: