8
D
VF-5400
TEST
Replace power PCBA or AC transformer.
YES
NO
Switch on the power PCBA
Repair or replace power PCBA
YES
NO
Make sure the main PCBA don't
short on VCC and switch it on.
YES
Check the regulators or related diodes.
YES
NO
Connect to PC RS232 cable and
update the FLASH memory code.
1. Check 27MHz system clock.
2. Check system reset circuit.
3. Check FLASH R/W enable signal PRD,
RWR.
4. Check RS232 SIGNALS.
5. Check FLASH memory related circuit.
NO
A
YES
Check the AC
Voltage power PCBA (110V or
220V)
Update FLASH
successfully?
Is the DC
voltage outputs OK?
(5V, 3.3V, 12V, 5.6V
MOTOR)
Is 3.3V
outputs normal on main
PCBA?
1. Check Q203.
2. Check D201.
3. Check IC102.
YES
NO
Is 1.8V voltage
normal for ZORAN IC
RESET or power on.
NO
NO
YES
Check connection lines
between FLASH & ZR36888
and the FLASH access time
whether is suitable or not.
NO
YES
Check connection lines
between SDRAM & ZR36888
and the SDRAM is damaged.
NO
YES
Check the related circuit of
ZR36888
NO
YES
Check the filtering and amp
circuit of TV signal.
Check AV cable
connection to TV set.
NO
NO
YES
Check the load OPEN &
CLOSE switch
NO
YES
Check the tray control IO
pins on ZR36888 & AM5869S
NO
YES
Check the tray control
amplifying circuit on motor
driver.
Check the cable
connection between main
PCBA and loader.
YES
YES
Show LOGO?
Flash
memory operates
properly?
ZR36888
VIDEO outputs
properly?
Normal
OUTSW & INSW
signals?
Normal
OPEN & CLOSE
signal?
Normal
LOAD+ & LOAD
signal?
Does tray
move inside when it is not
at closed position?
SDRAM
works properly?
Have TV
signal output?
A
B
3. SYSTEM TEST FLOW
TR
OUBLESHOO
TING
Summary of Contents for DVF-5400-B
Page 34: ...DVF 5400 ...
