Sharp 29V-FT450S - Troubleshooting Flowchart

29V-FT450S/29V-FT95S
26
TV29L-FG1MXService Manual29L-FG1MXMarketE
TROUBLE SHOOTING FLOWCHART
NO RASTER
LED COLOUR ?
Power On by R/C
Does horizontal
circuit momentary
oscillate ?
Check protector circuit
and pin 106 & 107
(waveform no.3 & 4)
of IC 2100. Also check
the waveform no.7 of
IC501 at pin 5 and its
related parts.
Check the power circuit
consisting of IC701,
IC702, T701 and its
related parts. Also check
the horizontal out circuit
Q604 and its related
parts.
Check CRT connector
(KY), (H) bias.
(14V, 120V, 210V line)
Normal Abnormal
Check R, G, B
input and output
of IC 851.
Check the 14V,
120V and 210V
line from the main
PWB side.
GREEN
RED
RED
Yes
No