DVF-3080-S/8100
12
ELECTRICAL TROUBLESHOOTING GUIDE
Show LOGO
A
yes
Reset or Power on
Flash
Memory operates
Properly?
Check connection on lines between FLASH
& M3355 and the FLASH access time
whether is suitable or not.
SDRAM
works properly?
Check connection lines between
SDRAM(IC503) & M3355 and the
SDRAM is damaged.
M3355
VIDEO outputs
properly?
Check the related circuit of M3355.
(IC501 PIN 2.3.7.8 check)
Have
TV signal output?
Does
Tray move inside
when it is not at closed
position?
Check the filtering and amp circuit of
TV signal .(IC604)
B
No
No
YES
YES
YES
YES
No
NO
NO
Normal
TROUT & TRIN
signals?
NO
Check the load OPEN &
CLOSE switch
Normal
TRCLOSE &TROPEN
signal?
NO
Check the Tray control IO pins
on M3355.
Normal
LOAD+ & LOAD
signal
NO
Check the Tray control amplifying
circuit on Motor driver.(IC201)
Check the cable connection between
main PCBA and loader. (MECHA)
Check AV cable
connection to TV set
NO
YES
YES
YES
Test
Check the AC Voltage
(110V or 220V)
Switch on the Power PCBA
Check the Power PART
Is
the DC Voltage
Outputs OK? (5.2V,5V,1.8V
,3.3V,8V,12V)
Check the Power PART
Is
3.3V, 1.8V,5V,12V and 8V
outputs normal on main
PCB
Check the IC105 or diode
Connect to PC RS232 Cable and
Update the flash memory code
Update
Flash(IC502)
Successfully?
A
1.Check 27MHz system clock.
2.Check system reset circuit.
3.Check flash R/W enable signal PRD
4.Check RS232 Signals
5.Check flash memory related circuit
Replace flash(IC502)
Yes
yes
yes
Yes
No
No
No
No
