DV-989AVi-S
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7.1.7 TROUBLE SHOOTING
START
Is FL turn on ?
Is the indication
of FL normal ?
Power ON
Yes
Yes
No
No
Turn on the power again
after 2 - 3 minutes.
• Blow out micro-fuse on the POWER SUPPLY Unit.
(P202 and P301)
FL indication is dark or flickers.
Indicates the error message
Refer to the section "7.1.6 ERROR DISPLAY".
• Tact-switches are damaged. (incase of only a key NG)
FLKY IC101-pin 22 is it 1.2V when you pushed a POWER key?
• Wireless remote controller receiver or IR signal line or SEL IR signal line is damaged.
(incase of only a key of wireless remote controller NG)
Does FLKB IC101-pin 17 (SEL IR) and IR and SEL IR signal lines change 0V–3.3V
when you pushed a wireless remote controller key?
• Blow out fuse of the primary side
• As for P-CONT of POWER SUPPLY Unit is around 3.3V. Blow out micro-fuse on the
POWER SUPPLY Unit. (Check the each voltage.)
P202, P301 of POWER SUPPLY Unit is damaged.
• FL controller IC (IC101) or RESET IC (IC102) on the FLKY Assy is damaged.
Are IC101-pin 12 (RESET OUT) and pin 11 (POWER ON) "H" level together?
• Check the following connections :
POWER SUPPLY Unit - DVDM Assy
DVDM Assy - AJKB Assy
DVDM Assy - VJKB Assy
DVDM Assy - FLKY Assy
• Check each voltage regulators of DVDM Assy :
IC401-pin 3 (+3.3V), IC402-pin 1 (+5V), IC403-pin 3 (+2.5V), IC404-pin 4 (+3V),
IC405-pin 4 (+5V), IC410-pin 1 (+1.8V), IC411-pin 3 (+2.5V)
• Check each voltage (EV+6V, EV+4V, SW+3.3V, +12V, -28V, FLDC+ and FLDC-)
(If above voltage are not supplied, check the micro-fuse P101, P201, P202, P301.)
Are not there short and open-circuit between output connector of POWER SUPPLY
Unit and CN401 of DVDM Assy?
• R410 of POWER SUPPLY Unit is damaged. No -28V voltage appear.
• Short or open the zenner diode on the POWER
SUPPLY Unit. (D505)
• Check the address bus and data bus of signal
interface between FR CPU (IC601)–AV1 (IC751),
Eby-Chip (IC701) and Servo DSP (IC201).
• Check each voltage regulators of DVDM Assy :
IC401 (+3.3V) and IC403 (+2.5V)
Clock generator IC481 or crystal resonator X481 is damaged.
Check waveform of each pin whether IC481 does oscillation.
• Check the following connections :
DVDM Assy (CN103)- LOAB Assy (5P connector assy)
DVDM Assy CN105-pin 12 (INSIDE SW signal)
• Check the loading drive signal : IC351-pin 14, 15, 16
• Check the +6V and +12V power supply voltage
(If above voltage is not supplied, check the micro-fuse P202 and P301.)
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