Sylvania 6842THG, Service Manual

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1-8-5 L0700TR
Pin (22) on CN113 Pin (5) on IC801
Pin (21) on CN113 Pin (2) on IC801
IC801 Pin (5) L-CH
IC801 Pin (2) R-CH
Is audio signal inputted to each pins on IC801?
No
CN113 Pin (22) L-CH
CN113 Pin (21) R-CH
Is audio signal inputted to each pins on CN113?
No
Yes
Yes
Check lines between Pin (22) on CN113 and
Pin (5) on IC801, between Pin (21) on CN113 and
Pin (2) on IC801, and service it if defective.
Replace the Digital CBA.
Pin (7) on IC801 Pin (1) on CN801
Pin (12) on IC801 Pin (1) on CN802
CN801 Pin (1) L-CH
CN802 Pin (1) R-CH
Is each audio signal inputted to Pin (1) on
CN801 and Pin (1) on CN802?
IC801 Pin (7) L-CH
IC801 Pin (12) R-CH
Is audio signal outputted to each pins on IC801?
Is +21V voltage inputted to Pin (10) on IC801?
No
No
No
No
Yes
Yes
Yes
Yes
Check lines between Pin (1) on CN801 and
Pin (7) on IC801, between Pin (1) on CN802 and
Pin (12) on IC801, and service it if defective.
Check +21V line and service it if defective.
Replace Speaker (SP801,SP802,SP851, or SP852).
Is the "L" pulse supplied to the base of Q802?
Replace IC801. Replace the Digital CBA.
Yes
A