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