Sharp 29L-FG1L - Chapter 4. Trouble Shooting Flowchart; Trouble Shooting Flowchart

29L-FG1L
4 – 1
TV29L-FG1LService Manual29L-FG1LMarketE
CHAPTER 4. TROUBLE SHOOTING FLOWCHART
[1] TROUBLE SHOOTING FLOWCHART
NO RASTER
LED COLOUR ?
Power on by R/C
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.
Does horizontal
circuit momentary
oscillate ?
Check CRT connector
(KY), (H) bias.
(Heater voltage,120 V,
210 V line)
Abnormal
Check R,G,B
input and output
of IC 851.
Check the
Heater voltage,
120V and 210V
line from the
main PWB side.
RED
GREEN
RED
Yes
No
Normal
Check3.3V&1.8V
supplies of IC 2100.
Check oscillation of
crystal X2001.