Basic Troubleshooting - JBL CS6100 Service Manual

CS100 (CS6100 Subwoofer)
AMP no signal out
Dc voltage check ±Vcc
Check+/-15VDC
LED light green or red
LED light green
Check U202 pin8 signal
Check limiter Circuit C317
yes
Test R147 signal
Check RY101,D110,Q112,Q113 etc
Check Q107,Q108,Q109 etc
Check M100 signal
CS100 SUB (UL) AMP
Troubleshooting Flow Chart
yes no
yes
LED red
yes
no
yes yes
yes
no
yes
yes
yes
no
Check Fuse,Transformer,
yes
D501, etc
yes
Check Q501.Q502.Q503,D502 etc
yes
Check,Q206,Q207,U203 etc
Check U201
pin1 signal
no
Check U301,R343,R344 ,
C340,Q301,Q302, etc
Check ,+VCC& -VCC
DC voltage
yes
Check CLASS 150W
MODEL
no
Check TH1
yes
The Amp ass'y OK, END
10
yes
CheckU201,U202,VR201
etc
no