BenQ 2720S Service Guide - Page 39

Scan Quality not Good, 11 Power Supply, 12 CCD Head

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6.10 Scan Quality not Good: ⊙ Mechanism --- Holder not correctly inserted, Old Lamp, CCD Mechanism ⊙ U1 OR U2 6.11 Power Supply 6.11.1 No Function after Power On: ⊙ Power input --- Regulators/Power Cord/Power Switch ⊙ U3 --- CPU 80C32 ⊙ Y1 --- XTAL 16MHZ ⊙ U8 --- IC 74HC04D ⊙ U2 --- ASIC(AP2106A) 6.11.2 Flash "7" and "8" times or Lamp Cannot Light On: ⊙ Power Board ⊙ Connector J1 ⊙ Flat Cable \ Flat Cable Connector J3 ⊙ Inverter Board ⊙ Lamp 6.12 CCD Head 6.12.1 Flash "7" and "8" times ⊙ U1 --- IC AFE AD9814 ⊙ Lamp/CCD Board ⊙ IR LED ⊙ U1 --- IC AFE AD9814 Trouble-shooting API Confidential 6-3 No Copy/Reproduction allowed

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6.10 Scan Quality not Good:
⊙
Mechanism --- Holder not correctly inserted, Old Lamp, CCD
Mechanism
⊙
U1 OR U2
6.11 Power Supply
6.11.1 No Function after Power On:
⊙
Power input --- Regulators/Power Cord/Power Switch
⊙
U3 --- CPU 80C32
⊙
Y1 --- XTAL 16MHZ
⊙
U8 --- IC 74HC04D
⊙
U2 --- ASIC(AP2106A)
6.11.2 Flash "7" and "8" times or Lamp Cannot Light On:
⊙
Power Board
⊙
Connector J1
⊙
Flat Cable \ Flat Cable Connector J3
⊙
Inverter Board
⊙
Lamp
6.12 CCD Head
6.12.1 Flash "7" and "8" times
⊙
U1 --- IC AFE AD9814
⊙
Lamp/CCD Board
⊙
IR LED
⊙
U1 --- IC AFE AD9814
Trouble-shooting
API Confidential
6-3
No Copy/Reproduction allowed