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TROUBLE SHOOTING FLOWCHART (Continued)
CIRCUITS TO BE CHECKED:
Sound Detector Circuit.
Sound Switch and Att.
Control.
Audio Output Circuit.
CIRCUIT TO BE CHECKED:
Sync. Separator Circuit.
NO SOUND
Does signal appear at pins
(10) and (23) of IC3501 ?
Does signal appear at pins
(6) and (8) of IC301 ?
Check IC301 and
Check Speaker.
peripheral circuit.
NEITHER VERTICAL NOR
HORIZONTAL SYNCHRONIZATION
Check pins(5), (6), (10) and
(11) of IC801.
DEFECTIVE VERTICAL AMP.
AND VERTICAL LINEARITY
Re-adjust vertical size.
(Bus Data)
Vertical linearity and size are
abnormal.
Check R503, R506, R513,
R520 and C515.
NO VERTICAL SCAN
Check IC501 bias.
Check C511.
5 – 2
Check TV sound from pin (54)
of IC801.
Check IC501.
21J-FG1RU
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