11
Trouble shooting Chats
Check
secondary voltage
Check
#2, #21, #24, #25, #43, #46, #65
#68~#70, #87 of I501
Check
#63~#64 of I501
Check
#71 of I504
Check #31~#32 of I501
Check #33 of I501
Check P902~P904
(B+, Micom_SDA/SCL,
UART_TX/RX, Boot Option)
Abnormal
B+
Abnormal
Micom_SDA/SCL
Abnormal
UART_TX/RX
Boot Option
Short to GND
Check/Replace
I506, I507 And
peripheral parts
Check/Replace
I100~I106, I200~I204,
I300~I301, TU300
Check/Replace
I301, TU300
Check/Replace
#6,#9 of I100, J077
And #61~#62 of I501
Check/Replace
#12 of JP01_2,
#41 of I100
And #26 of I201
*
Summary of Contents for DUA-3270GB
Page 4: ...4 2 Block Diagram 1 Analog Part ...
Page 19: ...19 7 Schametic Diagram 1 ALALOG MAIN PART ...
Page 20: ...20 Schametic Diagram 2 POWER PART ...
Page 21: ...21 Schametic Diagram 3 DIGITAL MAIN PART 1 ...
Page 22: ...22 Schametic Diagram 3 DIGITAL MAIN PART 2 ...
Page 23: ...23 Schametic Diagram 3 DIGITAL MAIN PART 3 ...
Page 24: ...24 8 Printed Circuit Board 1 Main PCB ...
Page 25: ...25 Printed Circuit Board 2 Power PCB ...
Page 26: ...26 Printed Circuit Board 3 Digital PCB Top ...
Page 27: ...27 Printed Circuit Board 4 Digital PCB Bottom ...
Page 28: ...28 Printed Circuit Board 5 CRT PCB 6 Union PCB ...
Page 29: ...29 9 Mechanical Exploded Diagram _ p p ª ø L fl T Œx bª Ø L fi Ø p fi Ø 9 p L ...