Troubleshooting Flow Chart - Infinity TSS-Sub500 Service Manual

TSS-Sub500
AMP no signal out
DC voltage check ±Vcc
Check +/-15v
Led light blue or red
LED light blue
Check U202 pin14 signal
yes
Check limiter board C304
yes
Test R121,122 signal
Check RLY101,D102,Q113,114
Check U101,Q115,116,R138
Check P102 signal

Troubleshooting Flow Chart

no
yes
yes no
Check Q117,118,119,D109 etc
yes
LED red
Check,Q203,207,U203 etc
yes
Check U201
no
pin14 signal
yes
no
yes
Check ,+vsw& -vsw
no
DC voltage
yes
Check Q107,108,105,
Q106,103,104,U101,etc
yes
no
yes
yes
The Amp ass'y ok, END
TSS500
Check fuse, transformer,
D110,D115 etc
yes
yes
yes
Check U201,R226,223 ,
U202,R213,214,C206
etc
no
Check U301,R343,344 ,
C340,Q301,302, etc
yes
Check Q120,121,122,123
no
Q124,125,126,127 etc
yes
Change the component
11