CE Tech Tips — February 2019

CE Tech Tips — February 2019

Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information. 

 Hitachi TV,  42HDS52A
Reason for Service: Low sensitivity, short range of remote
Solution: Check remote batteries first. If that doesn’t resolve, replace LED/IR receiver:  X480310. 

Insignia TV, NS-LCD37HD
Reason for Service: Solarized picture
Solution:  Found bad AS15 on T-Con board and replaced. 

Magnavox TV,  RPK712AK03  (P1)
Reason for Service: Vertical is collapsed.
Solution: Check the following: IC750, vertical chip, R445, should be 1 ohm/ half W., and C556, C558. 

Mitsubishi TV, WD65732
Reason for Service: At plug in, green front LED flashes continually and set won’t start.
Solution: Replacing DM board fixed this set. 

Philips TV, 50PF7220A/37
Reason for Service: Set starts for a second then shuts down with red flashing LED
Solution: Found two bad caps on power supply board: C8059 & C8060, both 3300uF/10V.

Reason for Service:  No analog channels or audio, but digital channels okay
Solution: Found open fuse, 1C33 on main board. Replace with #275819. 

Samsung TV,  LNT4671FX/XAA
Reason for Service: Set takes a long time to come on, and there are click sounds.
Solution: Bad caps in the power supply: check CB850, 1000uF/10V.

Vizio TV, VX37LHDTV10A
Reason for Service: Set won’t start; logo stays amber
Solution: Found defective AMC regulator, U8.  Replacing it fixed the set.

Zenith TV, module 9-1909
Reason for Service: One color missing
Solution: Check 120k ohm resistors 5103, 5110 and 5119 on CRT board.  Then, check transistors on the main: Q2200, Q2201, Q2202.







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