NO POWER
FUSE & DIODE BRIDGE
Check and replace the F901, BD901, TH901, and TH902 in SMPS board.
How to Solve Problems (countermeasures)
1) Check the fuse F901 is open or short circuit.
2) Check if the diode bridge DB901 is shorted circuit over load with a digital multi meter.
3) Check if the NTC thermistor TH901 / TH902 is normal or open.
NO POWER
D951 / D952, ZD951
Check and replace the D951, and D952, ZD951 in SMPS board.
How to Solve Problems (countermeasures)
1) Check the voltage of the anode-cathode of D951 / D952 with a digital multimeter. The voltage is normally 0.2 ~ 0.3 V. If he does not have any tension it is because it has been damaged. Replace it with a new one.
2) Make sure the ZD951 is not short-circuited.
If found shorted, replace it with another new.
FUSE & DIODE BRIDGE
Check and replace the F901, BD901, TH901, and TH902 in SMPS board.
How to Solve Problems (countermeasures)
1) Check the fuse F901 is open or short circuit.
2) Check if the diode bridge DB901 is shorted circuit over load with a digital multi meter.
3) Check if the NTC thermistor TH901 / TH902 is normal or open.
D951 / D952, ZD951
Check and replace the D951, and D952, ZD951 in SMPS board.
How to Solve Problems (countermeasures)
1) Check the voltage of the anode-cathode of D951 / D952 with a digital multimeter. The voltage is normally 0.2 ~ 0.3 V. If he does not have any tension it is because it has been damaged. Replace it with a new one.
2) Make sure the ZD951 is not short-circuited.
If found shorted, replace it with another new.
DO NOT WHEN THE MACHINE IS ON BOOTS
The
device does not work for problems related to the power failure when press the on both the front panel of the unit
and the remote control button.
FLASH MEMORY (IC101)
Check
and replace the IC101 on the motherboard.
How to Solve Problems (countermeasures)
1)
Check 3.7VA in CN103 CN102, CN104 in standby mode. If there is 3.7 VA, check the SMPS board.
2)
Check for 5.6 V, 12 VA FL, +, FL and 32 V to turn on the unit.
If the set does not work, regardless of changes in KEY1 to high or low as pressing the power button. The X100 and X101
to function normally, but if you cannot connect the device, please replace the
IC101 for a new one on the motherboard.
The
FVD NOT SHOW ANY PICTURE WHEN ON THE MACHINE
By
connecting the device, icons or characters at the VFD are not displayed.
VFD
Check
and replace the DIG301 on the front plate.
How
to Solve Problems (countermeasures)
1)
Make sure VKK (-32 V), FL + and FL- were out of SMPS for VFD through the main
board.
2)
Make sure 3.3 VA entered IC301.
3)
Check that the IC101 output VFD_RST, VFD_CLK, VFD_STB and VFD_STB to the front
plate.
4)
Make sure the pin P1 ~ 15G of DIG301.
If
there is no sign, replace IC301 a new one.
If
there is no problem, replace with a new VFD.
NO
START IN FUNCTION CD / USB
After
connecting the power switch and see the message in the following order (HELLO ->
VOL XX -> CD or USB) ON VFD, another message is not displayed in VFD, and
not begin normally.
WITHOUT
VCC33, VCC12
Check
and replace IC505, IC509 in the MAIN board.
How
to Solve Problems (countermeasures)
1)
Check the voltage of IC505 pin2 in the MAIN board. If IC505 pin2 (about 4.9 V)
and D501 input 5.6 VA fails, check VA 5.6 from the SMPS board.
2)
If IC505 pin2 (about 4.9 V) is normal, check if PWR_CTRL (IC505 pin 1) is
raised (about 3.3 V). If PWR_CTRL is not
high, check the pin63 of IC101 & R149, R503.
3)
If PWR_CTRL is high, check R592, R593 and if there is defective component, then
replace IC505.
4)
If 3.3 V (VCC33) is normal, check the output (pin2,4) of IC509 voltage. If 1.2 V IC509 pin2,4 is not released, then
replace IC509.
NO START IN FUNCTION CD / USB
After connecting the power switch and see the message in the following order (HELLO -> VOL XX -> CD or USB) ON VFD, another message is not displayed in VFD, and not begin normally.
CRYSTAL (X501)
Check and replace X501 in the MAIN board.
How to Solve Problems (countermeasures)
1) If 3.3V & 1.2V is normal, select Reset 'Alto' the IC501 pino153 in the MAIN board. If PRINCIPAL_RESET is not high, check MICOM (IC101) pin59.
2) If PRINCIPAL_RESET is high, check the status of the 12 MHz crystal welding (X501).
3) If the crystal (X501) does not fluctuate, check R541, R542, C517, C518 around the crystal (X501). If there is defective component, then replace X501.
NO START IN FUNCTION CD / USB
After connecting the power switch and see the message in the following order (HELLO -> VOL XX -> CD or USB) ON VFD, another message is not displayed in VFD, and not begin normally.
FLASH SERIAL (IC503)
Check and replace IC503 in the MAIN board.
How to Solve Problems (countermeasures)
1) If the crystal (X501) is oscillating, check the serial flash (IC503) in the MAIN board. Check pin8 (VCC), pino6 (CLK), pin 1 (CS #), pin2 (DO), pin5 (DI) waveform below.
2) If the pins1, 2, 5, 6, 8 do not give results, check the damping resistor (R511, R513, R514, R515) of IC503. If the IC503 damping resistor is OK, then replace IC503. (It must download the program)
3) After changing IC503, if not already under the waveform, check IC501 (DSP IC).
Contd:
