3-6
4. SYSTEM TEST FLOW
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 VCCs 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
and 1.8V DC outputs normal
on main PCBA?
ELECTRICAL TROUBLESHOOTING GUIDE
Содержание T517AH
Страница 9: ...1 8 MEMO ...
Страница 30: ...3 17 FIG 7 2 DVD F FE RFL FIG 7 3 CD F FE RFL ...
Страница 31: ...3 18 FIG 7 4 CD F FE RFL 8 FOCUS ON WAVEFORM 27 28 29 30 27 28 29 30 FE FOSO F F IC601 FIG 8 1 DVD ...
Страница 35: ...3 22 13 AUDIO OUTPUT FROM MT1389S FIG 13 1 ...
Страница 36: ...3 23 CONNECTOR PICTURE 1 ALL CONNECTOR PICTURE ...
Страница 37: ...3 24 2 MAIN BOARD CONNECTOR PICTURE ...
Страница 38: ...3 25 CN201 MD 23PIN 3 CN201 CONNECTOR PICTURE CN202 MD 9PIN 4 CN202 CONNECTOR PICTURE ...
Страница 39: ...3 26 CN602 POWER 10PIN 6 CN602 CONNECTOR PICTURE CN601 Front 12PIN 5 CN601 CONNECTOR PICTURE ...
Страница 40: ...3 27 CN604 USB 4PIN 7 CN604 CONNECTOR PICTURE CN605 KARAOKE 4PIN 8 CN605 CONNECTOR PICTURE ...
Страница 41: ...3 28 CN705 5 1ch 12PIN 9 CN705 CONNECTOR PICTURE ...
Страница 49: ...3 37 3 38 2 MPEG CIRCUIT DIAGRAM ...
Страница 50: ...3 39 3 40 3 SERVO CIRCUIT DIAGRAM ...
Страница 51: ...3 41 3 42 4 JACK CIRCUIT DIAGRAM ...
Страница 52: ...3 43 3 44 5 SCART CIRCUIT DIAGRAM OPTION ...
Страница 53: ...3 45 3 46 6 USB CIRCUIT DIAGRAM 7 KEY CIRCUIT DIAGRAM ...
Страница 54: ...3 47 3 48 8 TIMER CIRCUIT DIAGRAM ...
Страница 57: ...3 53 3 54 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 59: ...3 57 3 58 5 SCART P C BOARD OPTION TOP VIEW BOTTOM VIEW 6 USB P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 65: ...4 6 MEMO ...
Страница 67: ...4 9 4 10 MEMO MEMO ...