Epson TM-J8000 Spezifikationen PDF herunterladen (Seite 110)

5-18 Repair and Troubleshooting Rev. B

Confidential

(*) Some of the test points are indicated as test terminals on the circuit board. For the other test points, check the

component terminals.

Table 5-12 Test Points for the main circuit board unit

Class Description Test terminal

Component

terminal

Normal

value (DC)

Logic circuit power supply

(VCC)

Semiconductor switch ON SW5V – 0 ∼ 0.4 V

Semiconductor switch OFF 4.8 ∼ 5.2 V

Logic circuit power supply (VCC)

(Q1 ON)

–Q1, terminal

5 V

Logic circuit power supply (GND) SG – 0 V

Mechanism assembly

power supply

+35 V-component drive power supply

(Q2 ON)

–Q2, terminal

35 V

+24 V-component (Motor,AC) drive

power supply (U10 ON)

– U10 pin # 3 24 V

Ink jet head power supply IJCOM – ∼ 35 V

Ink jet head power supply VP – 37 ∼ 42.5 V

Motor,carriage During Motor,carriage drive REF_CR – 0.4 ∼ 3.0 V

Motor,carriage stationary 4.2 ∼ 5.2 V

Motor,pump During Motor,pump drive REF_PM – 6.08 ∼ 6.40 V

Motor,pump stationary (hold) 3.90 ∼ 4.16 V

Motor,paper feed During Motor,paper feed drive REF_PF – 5.01 ∼ 6.40 V

Motor,paper feed stationary (hold) 2.56 ∼ 2.74 V

Motor,shutter During Motor,shutter drive REF_SM – 4.98 ∼ 5.27 V

Motor,shutter stationary (hold) 1.45 ∼ 1.57 V

Solenoid,slip hold,top For Solenoid,slip hold,top REF_PL – 3.25 ∼ 4.78 V

RTC RTC power supply VBAT – 2 ∼ 3.55 V

I/F circuit board unit power

supply

– IF24V – 24 V

Customer display power

supply

– DM24V 23 ∼ 25 V

Drawer power supply U1K is ON – U1K pin # 3 24 V

Front power switch Front power switch control power

supply

PC5V – 4.8 ∼ 5.2 V

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