Page 2
Framingham, MA 01701-9168 SIZE
A FSCM
32108 CLASS
FM DWG NO.
264563-TT SHEET
3 of 3
REV.
01
Troubleshooting Tips, continued
Product Symptom Check Action
AV28 Media
Center No Display Q101 Check for shorted transistor Q101 on main
pcb. Part # 260354-001.
AV28 Media
Center
No dialogue
from left and
right channels
when in 5
speaker mode. Flash IC U2 on main
pcb If resetting the console and the bass module
does not correct this issue, replace flash IC
U2. Part # 307513.
AV28 Media
Center
Unit has power,
but will not boot
up Flash IC U2 on main
pcb, If all power supply voltages are present and
a test CD/DVD drive does not work, flash IC
U2 may be defective. Replace IC part #
307513 if defective.
AV28 Media
Center
No audio, no
remote
response Check for 10V at
U302 pin2 on tuner
pcb. If the +10V is not present U201 on main pcb
may be internally shorted to ground through
pin 3. Lift the pin to see if the 10V comes
back. If U201 is not shorted, the following
components on the main board also use the
10V supply: U204, U205, U305, U405 and
U504.
AV28 Media
Center
No Video Check for 8Vdc at
VR1 pin 4 on main
pcb If the 8V supply is missing, check for shorted
cap C627 on bottom side of main pcb.
AV28 Media
Center
No audio from
Zone 1. Check Zone 1
protocol setting on
display menu. If Zone 1 protocol is set to legacy, there will
be no audio from Zone 1.
AV28 Media
Center No audio from
Zone 1. R342, R341, R340
and T301 on main
pcb. Using an oscilloscope, check for a SPDIF
signal at pins 1 and 2 of din connector J301.
If the signal is not present check U306 pin
26. If the signal is coming out of U306 check
the following components for open: R342,
R341, R340 and T301.
9-Pin Din, Pin Location
To measure T301, check for continuity
between pins 1 and 4, and pins 5 and 8.
