Sharp 21F-PT220 User Manual

21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
5 – 2
TROUBLE SHOOTING FLOWCHART (Continued)
Does signal appear at pins
(8) of IC301 ?
NO SOUND
CIRCUITS TO BE CHECKED:
Sound Detector Circuit.
Sound Switch and Att.
Control.
Audio Output Circuit.
Check signal appear from pin (50)
of IC801 to pin (4) of IC301.
NEITHER VERTICAL NOR
HORIZONTAL SYNCHRONIZATION
CIRCUIT TO BE CHECKED:
Sync. Separator Circuit.
Check pins(9), (13) and (14)
of IC801.
Check Speaker.
Check IC301 and
peripheral circuit.
NO VERTICAL SCAN
Check IC501.Check C511.
Check IC501 bias.

Sharp 21F-PT220 Specifications

General

Brand	Sharp
Model	21F-PT220
Category	TV
Language	English