Check if
CN4 PIN1 is 5V？
1.
1. Power Supply Troubleshooting
Power Supply Troubleshooting
Check if
CN4_PIN1 is 5V？
Y
N
Check power board and power cord
Check if
U6_PIN2 is 3.3V?
Change U6
Power on and check if
Y
N
Change U6
CN4_PIN2 is 5V?
1、Check if Q5 and Q7
Check if CN4 PIN7 8 are
Y
N
are normal.
2、Upgrade software
Check if CN4_PIN7,8 are
5V and PIN10 is 12V?
Check power board and
Y
N
Check U5,L1
d
surrounding
Check if U5 is
1.2V？
Check power board and
power cord
Check if U8
and U3 are
3.3V and1.5V?
Y
N
Y
N
and
surrounding
components
OK
Check if E26 is
1.12V?
Check U6,U8
Y
N
OK
Check L1
第 55 页，共 80 页
Summary of Contents for STV-26ALED3
Page 1: ...SERVICE MANUAL STV 26LED3 STV 32LED3 STV 26ALED3 第 1 页 共 80 页 ...
Page 30: ...第 30 页 共 80 页 ...
Page 31: ...第 31 页 共 80 页 ...
Page 32: ...第 32 页 共 80 页 ...
Page 33: ...第 33 页 共 80 页 ...
Page 40: ...9 Housing ASSEMBLY DRAWING 结构尺寸 第 40 页 共 80 页 ...
Page 65: ...STV 26LED3 Line Diagram 第 65 页 共 80 页 ...
Page 66: ...STV 32LED3 Line Diagram 第 66 页 共 80 页 ...
Page 67: ...STV 26ALED3 Line Diagram 第 67 页 共 80 页 ...
Page 69: ...B AML8726 XX System upgrade documentation Upgrade System for B AML8726 XX 第 69 页 共 80 页 ...
Page 72: ...B AML8726 XX System upgrade documentation Image 3 Image 4 第 72 页 共 80 页 ...
