BenQ 2720S Service Guide - Page 37
Trouble-shooting
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Chapter 6 Trouble-shooting 6.1 Error Code Identification from "Status" LED When the LED flashes: "1" time - FLASH or Firmware Upgrade error "2" times - DATA RAM error "3" times - Reserved "4" times - ASIC (AP2106) error "5" times - Line Motor/Home Sensor error "6" times - Auto Focus Motor/Sensor error "7" times - DC Offset error "8" times - Lamp/CCD error 6.2 No Function after Power On: ⊙ Power input --- Regulators/Power Cord/Power Switch ⊙ U3 --- CPU 80C32 ⊙ Y1 --- XTAL 16MHZ ⊙ U8 --- IC 74HC04D ⊙ U2 --- ASIC(AP2106A) 6.3 Cannot Link with Host Computer: ⊙ Interface - SCSI Cable/Loose Plug ⊙ U2 --- ASIC(AP2106A) ⊙ U6 --- DRAM ⊙ U8 --- IC 74HC04D Trouble-shooting API Confidential 6-1 No Copy/Reproduction allowed
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Chapter 6 Trouble-shooting
6.1 Error Code Identification from “Status” LED
When the LED flashes:
“1” time - FLASH or Firmware Upgrade error
“2” times - DATA RAM error
“3” times – Reserved
“4” times – ASIC (AP2106) error
“5” times - Line Motor/Home Sensor error
“6” times – Auto Focus Motor/Sensor error
“7” times - DC Offset error
“8” times - Lamp/CCD error
6.2 No Function after Power On:
⊙
Power input --- Regulators/Power Cord/Power Switch
⊙
U3 --- CPU 80C32
⊙
Y1 --- XTAL 16MHZ
⊙
U8 --- IC 74HC04D
⊙
U2 --- ASIC(AP2106A)
6.3 Cannot Link with Host Computer:
⊙
Interface – SCSI Cable/Loose Plug
⊙
U2 --- ASIC(AP2106A)
⊙
U6 --- DRAM
⊙
U8 --- IC 74HC04D
Trouble-shooting
API Confidential
6-1
No Copy/Reproduction allowed