JBL MPS-1000, Service Manual, Page: 10 / 29

MPS1000 Troubleshooting Flow Chart
no no
yes yes
yes yes yes no
no
yes
yes yes
yes no
no
led light Blue
yes
no
yes
yes no
yes
no
yes yes
no yes
no
yes
no yes
yes
no
yes
yes
no
yes
AMP no signal out
Dc voltage check ±VH
Check+/-15VDC
Led light Blue
Check Q508.Q509.Q510.Q511.
D511.D514 etc.
Check R234.R228 signal
Check D201.D202.R280.R278
R293,etc
Check ,+VH& -VH DC
Voltage
Check W200 PIN7.PIN8 signal
Check Q531,Q532.Z501.Z502 etc
Check M100 signal
Check RL50.
Class-D pin2
i l
Check R278,R293 signal
Check M200 P4. PIN5
signal
Check U1.P1.ect
Check Class-D pin6 signal.
Q417.etc
Check R563.R564.R273.
R274.R275.R257. etc
Check U203.Q200.Q201,
etc
Check U201.U200.U204.VR201.VR202.
VR203.SW2.etc
Check CLASS-D 300W
module.transformer(T500)
Check U500,Q505.Q506.
Q513.Q514 etc
Check Fuse,D500.Rem pin
.Q500.Q501 etc
Check U203 Pin1 signal
Check,Q515,Q516,Q517 etc
The Amp Ass
'
Y OK, END
MPS1000 Subwoofer
9