no
yes
yes
yes no
yes
yes
LED red
LED light blue yes yes
no
yes yes no
no
yes
yes yes
no
no
ye s yes
yes
no
yes
yes
AMP no signal out
DC volta
g
e check ±Vcc
Check +/-15v
Led light blue or red
Check fuse, transformer,
D110,D115 etc
Check RLY101,D102,Q113,114 Check Q107,108,105,
Q106,103,104,U101,etc
Check ,+vsw& -vsw
DC voltage
Check U101,Q115,116,R138
Check Q117,118,119,D109 etc
Check,Q203,207,U203 etc
Check U202 pin14 signal
Check U201
pin14 signal
Test R121,122 signal
Check P102 signal The Amp ass’y ok, END
Check U201,R226,223 ,
U202,R213,214,C206
etc
Check Q120,121,122,123
Q124,125,126,127 etc
Check limiter board C304 Check U301,R343,344 ,
C340,Q301,302, etc
Change the component
11
TSS-Sub500