Sylvania 6842THG Service Manual page 38

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