Sylvania 6842PE Service Manual page 29

Is input switching signal inputted to each pins on
IC202 and IC203?
[****] is the check point on the componet side.
Pin (9)
[Q205-C]
Video 1
L
Video 2
L
Component 1
L
Component 2
L
Is audio signal outputted to each pins on IC202
and IC203?
[****] is the check point on the componet side.
IC203 Pin (3) [J148] L-CH
IC202 Pin (3) [J142]
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?
CN802 Pin (1) L-CH
CN801 Pin (1) R-CH
Replace Speaker (SP801 or SP802).
A
Yes
Pin (9) Pin (9)
[Q204-C] [Q203-C]
L L
L H
H L
H H
Yes
R-CH
Yes
Yes
Yes
Yes
Check lines between each pins on IC203 and
each pins on IC205, between each pins on IC202
and each pins on IC205 and service it if defective.
No
Pin (9) on IC202,IC203
Pin (10) on IC202,IC203
Pin (11) on IC202,IC203
Check +6.5 V line and service it if defective.
No
Is +6.5V signal inputted to Pin (16) on IC202
No
and Pin (16) on IC203?
Yes
Replace IC202 or IC203.
Check lines between each pins on IC203 and
No
each pins on IC801, between each pins on IC202
and each pins on IC801 and service it if defective.
Pin (3) on IC202
Pin (3) on IC203
Check +18 V line and service it if defective.
No
No
Is +21V signal inputted to Pin (10) on IC801?
Yes
Is the "L" pulse supplied to the base of Q801?
Yes
Replace IC801.
No
Check lines between Pin (1) on CN801 and each
pins on IC801, between Pin (1) on CN802 and
each pins on IC801 and service it if defective.
Pin (7) on IC801
Pin (12) on IC801
1-7-3
Pin (30) on IC205
Pin (29) on IC205
Pin (28) on IC205
Pin (5) on IC801
Pin (2) on IC801
No
Replace IC205.
Pin (1) on CN802
Pin (1) on CN801
L0604TR