Troubleshooting Flow Chart - Infinity PS212 Service Manual

PS series PS212 subwoofer
AMP no signal out
DC voltage check ±Vcc
Check +/-15v
LED light Green or
LED light Green
Check P104 pin8 signal
Check limiter Circuit C151
Test J111 signal
Check Class 300W MODULE
Check k101 etc
Check P102 signal

Troubleshooting Flow Chart

yes no
Check Q116,Q117,Q118,,D122
yes
LED red
yes
no
yes yes
Check U106 r204.205.206.207
D112.D113, etc
yes yes
Check ,+vbbp&-vbbp
no
dc voltage
yes
yes
yes
yes
PS212
no
Check fuse, transformer,
yes
D123.D124 etc
yes
yes
Check,Q102,101,U103 etc
yes
Check U105
Pin7 signal
no
no
no
yes
Check d130,r263.265 etc
no
Change Q108.109.110.111 etc
Amp ass'y OK, END
12
Check U101,R233,286 ,
U102, etc
yes
Check r257.r258 etc