Epson 890N Service Manual - Page 51

Table 2-5., Output Specifications, Protective Functions - fx 890 specs

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EPSON FX-890/2190 Revision B Power Supply Unit Name Special output holding time (The period from the time when output 1 has dropped below 26 V to the time when output 2 drops below the output voltage lower limit) Table 2-4. Input Specifications C524 PSB (100-120V Spec) C524 PSE (220-240V Spec) 120 ms or more (Input: 85 V, 60 Hz) (Input: 187 V, 50 Hz) C524 PSH (100-240V Spec) (Input: 85 V, 60 Hz) (Output: At output 1 of no-load and output 2 of rated load) Note "*1": Each value indicated here is only the average of measured values of samples (sample size n = 3), that is, it is not a typical value or guaranteed value. "*2" : Each value does not include the current flowing in the capacitor of the EMI filter circuit. OUTPUT SPECIFICATIONS Table 2-5. Output Specifications Item Rated output voltage Output 1 +42 V Output 2 +5 V Output voltage fluctuation *1 40.0 ~ 44.0 V 4.75 ~ 5.25 V Rated output current 0.8 A 0.7 A Output current at startup *2 0 A 0.7 A Output current range 0~2.8 A 0~0.7 A Ripple voltage *3 ----- 100 mVpp Typ. Spike voltage *3 1500 mVpp Typ. 300 mVpp Typ. Note "*1": Neither Output 1 nor Output 2 includes the spike voltage component. "*2" : The output current during power supply startup must be not greater than the value specified above. "*3" : The values for ripple and spike voltage indicated above, which are the values with a rated resistance load, are only for reference. (Ambient temperature: 25°C) For measurement, connect a KMF50V470µF electrolytic capacitor and 0.1 µF film capacitor to the output 1 terminal, and a KME16V47µF electrolytic capacitor and 0.1µF film capacitor to the output 2 terminal. PROTECTIVE FUNCTIONS Table 2-6. Protective Functions Item Output 1 Overcurrent protection (OCP) Dropping + cutoff OCP reset method Turning power off once and on again Load short-circuit current 0 A Overvoltage protection (OVP) Cutoff type OVP preset voltage 45 ~ 58 V Output 2 Cutoff Turning power off once and on again 0 A Cutoff type 6 ~ 9 V Operating Principles Overview 51

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EPSON FX-890/2190
Revision B
Operating Principles
Overview
51
Note
“*1”:
Each value indicated here is only the average of measured values of samples
(sample size n = 3), that is, it is not a typical value or guaranteed value.
“*2” :
Each value does not include the current flowing in the capacitor of the EMI filter
circuit.
OUTPUT SPECIFICATIONS
Note
“*1”:
Neither Output 1 nor Output 2 includes the spike voltage component.
“*2” :
The output current during power supply startup must be not greater than the value
specified above.
“*3” :
The values for ripple and spike voltage indicated above, which are the values with a
rated resistance load, are only for reference. (Ambient temperature: 25
°
C)
For measurement, connect a KMF50V470
µ
F electrolytic capacitor and 0.1
µ
F film
capacitor to the output 1 terminal, and a KME16V47
µ
F electrolytic capacitor and
0.1
µ
F film capacitor to the output 2 terminal.
PROTECTIVE FUNCTIONS
Special output holding
time
(The period from the
time when output 1 has
dropped below 26 V to
the time when output 2
drops below the output
voltage lower limit)
120 ms or more
(Input: 85 V, 60 Hz)
(Input: 187 V, 50 Hz)
(Input: 85 V, 60 Hz)
(Output: At output 1 of no-load and output 2 of rated load)
Table 2-5.
Output Specifications
Item
Output 1
Output 2
Rated output voltage
+42 V
+5 V
Output voltage fluctuation
*1
40.0 ~ 44.0 V
4.75 ~ 5.25 V
Rated output current
0.8 A
0.7 A
Output current at startup
*2
0 A
0.7 A
Output current range
0~2.8 A
0~0.7 A
Ripple voltage
*3
-----
100 mVpp Typ.
Spike voltage
*3
1500 mVpp Typ.
300 mVpp Typ.
Table 2-4.
Input Specifications
Power Supply Unit
Name
C524 PSB
(100-120V Spec)
C524 PSE
(220-240V Spec)
C524 PSH
(100-240V Spec)
Table 2-6.
Protective Functions
Item
Output 1
Output 2
Overcurrent protection (OCP)
Dropping + cutoff
Cutoff
OCP reset method
Turning power off
once and on again
Turning power off
once and on again
Load short-circuit current
0 A
0 A
Overvoltage protection (OVP)
Cutoff type
Cutoff type
OVP preset voltage
45 ~ 58 V
6 ~ 9 V