14B-S5
21B-S5
(Continued)
Check pins (3) and (6) of IC501.
19-2
Check IC501 Bias
Vertical Linearity and Size are abnormal.Check R503, R506, R513, C517 and D501.Readjust Vertical Size. (Bas Data)
Check pins (16), (17) and (34) of IC801.
NO VERTICAL SCAN
NEITHER VERTICAL NOR
AND VERTICAL LINEARITY
DEFECTIVE VERTICAL AMP.
NormalAbnormal
HORIZONTAL SYNCHRONIZATION
Check pins (21) and (22) of IC801.
TROUBLE SHOOTING TABLE
Sync. Separator Circuit.
CIRCUIT TO BE CHECKED:
NO
YES
Check IC801.
Check IC801 and its related circuit.Check Q204 and its related circuit.
YES
YES
No snow noise.
(Continued)
Does signal appear at pin (28) of IC801.Check IC401 and peripheral circuit.
AbnormalCheck F301Check pins (8) and (11) of IC302.
NONO
Does signal appear at pin (40) of IC801 ?
Does signal appear at pin (38) of IC801 ?
Check pin (1) of SF201 and Tuner's related circuit. Check pin (37) of IC801 and related circuit.
NO
19-1
NO
Check IC302 bias.
NO SOUND
Does the noise level increase at max. Contrast, Brightness and Sound controls ?
YES (Signal)YES
NO PICTURE, NO SOUND
AbnormalNormal
Check pin (27) of IC801, Tuner and related circuit.
Normal
Does signal appear at pins (3) and (22) of IC303.Does signal appear at pins (7) and (12) of IC302 Check P301 connection between IC302 and peripheral circuit.
Check the tuner AGC at TP201.
Normal
Noise increases but no signal is received.
TROUBLE SHOOTING TABLE
Check the tuner supply voltage LB must approx. 5V. BT must be approx. 32V and CH preset data check.Check pin (38) of IC801.
Sound system pins (28), Sound Detector Circuit.Sound Switch and Att. Audio Output Circuit.
CIRCUITS TO BE CHECKED: Tuner. PIF. Automatic Gain Control. (5V), (32V) Power Source.CIRCUITS TO BE CHECKED: (3), (5), (22), (24) of IC801 and pin (27) of IC401. Control.
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