CONFIDENTIAL
–
DO NOT COPY
Page
9-1
File No. SG-0209
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TROUBLE
OF
DC-DC
CONVERTER
Start
J1 PIN10,11,12
J1 PIN 2,3,4,5
The voltage is about + 12V while power switch on
1. Is J1 connection good
2. Check J1 Pin1 is up to about 3.3V?
3. Check power board
4. Check F1.
The voltage is about + 5V
1. Check power board
2. Check power cable, F2 & connection J1
3. Check U8 pin1 (+5V) & pin2 (+3.3V)
U1 pin 5 6 7 8
The voltage is about +5V while power switch on
1. Check F2 & U1
2. Check OPWRSB (R20)
3. Check U1 pin1&2 or pin 3&4, should have -1V
more
U2, U4 & U33
The voltage is about +3.3V
1. Check F2 & U1
2. Check U2, U4 & U33
U6 pin 2
The voltage is about +1.8V
1. Check F2 & U1
2. Check U6
U10 pin2
The voltage is about +2.6V while power switch on
1.Check J1 Connect
2.Check U10
U5 pin2
The voltage is about +1.2V while power switch on
1. Check F2 & U1
2. Check U5
END
U3 pin1 & pin2
The voltage is about +12V to +5V(for Tuner)while
power switch on
1. Check F1
2. Check U3 pin1 (+12V) & U3 pin2 (+5V)
Summary of Contents for VX37L HDTV10A
Page 9: ...CONFIDENTIAL DO NOT COPY Page 3 2 File No SG 0209 ...
Page 43: ...CONFIDENTIAL DO NOT COPY Page 7 12 File No SG 0209 PIN ASSIGNMENT ...
Page 44: ...CONFIDENTIAL DO NOT COPY Page 7 13 File No SG 0209 PIN DESCRIPTION ...
Page 55: ...CONFIDENTIAL DO NOT COPY Page 7 24 File No SG 0209 BLOCK DIAGRAM ...
Page 63: ...CONFIDENTIAL DO NOT COPY Page 7 32 File No SG 0209 Fig E RESET TIMING WAVEFORM ...
Page 65: ...CONFIDENTIAL DO NOT COPY Page 7 34 File No SG 0209 1 Pin Configuration ...
Page 66: ...CONFIDENTIAL DO NOT COPY Page 7 35 File No SG 0209 2 Input Output Functional Description ...
Page 69: ...CONFIDENTIAL DO NOT COPY Page 7 38 File No SG 0209 5 Register Definition 6 Burst Definition ...
Page 72: ...CONFIDENTIAL DO NOT COPY Page 7 41 File No SG 0209 7 Simplified State Diagram ...
Page 73: ...CONFIDENTIAL DO NOT COPY Page 7 42 File No SG 0209 8 Absolute Maximum Ratings 9 Capacitance ...
Page 77: ...CONFIDENTIAL DO NOT COPY Page 7 46 File No SG 0209 Block Diagram ...
Page 81: ...CONFIDENTIAL DO NOT COPY Page 8 1 File No SG 0209 CH1 GP C89 CH1 GREEN R195 CH2 VGAVSYNC R213 ...
Page 85: ...CONFIDENTIAL DO NOT COPY Page 8 1 File No SG 0209 CH1 DACMCLK U28 PIN5 CH1 DACLRCK U28 PIN7 ...
Page 90: ...CONFIDENTIAL DO NOT COPY Page 8 1 File No SG 0209 CH1 VODE DU9 PIN W2 CH1 VOPCLK DU9 PIN V3 ...
Page 99: ...CONFIDENTIAL DO NOT COPY Page 10 3 File No SG 0209 Main Board Block Diagram ...
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