3-4
3. Test & debug flow
TEST
Check the AC Voltage
Power PCBA(110V or 220V)
YES
Switch on the Power PCBA
YES
Is the DC Voltage outputs OK?
(5V, 3.3V, 12V,5.6V MOTOR)
YES
Make sure the main PCBA don't short on
VCCs and switch it on.
YES
Is 3.3V and 1.8V DC outputs normal on
main PCBA?
YES
Connect to PC RS232 Cable and update
the FLASH memory code.
YES
Update FLASH successfully?
YES
A
Replace power PCBA or AC transformer.
NO
Repair or Replace Power PCBA
NO
Check the regulators or related diodes.
NO
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
Summary of Contents for DK763X
Page 27: ...3 16 FIG 7 2 DVD FIG 7 3 CD F F FE FE RFL RFL ...
Page 28: ...3 17 FIG 7 4 CD 8 FOCUS ON WAVEFORM FIG 8 1 DVD FE FOSO F F F FE RFL ...
Page 32: ...3 21 2 COMPOSITE VIDEO SIGNAL FIG 12 2 13 AUDIO OUTPUT FROM AUDIO MT1389E FIG 13 1 ...
Page 39: ...3 29 3 30 2 SYSTEM CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 40: ...3 31 3 32 A B C D E F G H I J K L M N O P Q R S T 3 SERVO CIRCUIT DIAGRAM ...
Page 41: ...3 33 3 34 4 AV JACK CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 42: ...3 35 3 36 5 TIMER CIRCUIT DIAGRAM 3 TOOL ONLY A B C D E F G H I J K L M N O P Q R S T ...
Page 43: ...3 37 3 38 6 TIMER CIRCUIT DIAGRAM 4 TOOL ONLY A B C D E F G H I J K L M N O P Q R S T ...
Page 44: ...3 39 3 40 7 TIMER CIRCUIT DIAGRAM 6 TOOL ONLY A B C D E F G H I J K L M N O P Q R S T ...
Page 45: ...3 41 3 42 8 TIMER CIRCUIT DIAGRAM 7 TOOL ONLY A B C D E F G H I J K L M N O P Q R S T ...
Page 46: ...3 43 3 44 9 TIMER CIRCUIT DIAGRAM 8 TOOL ONLY A B C D E F G H I J K L M N O P Q R S T ...
Page 49: ...3 49 3 50 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
