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1. BLOCK DIAGRAM
Display tube AC transformer Power supply circuit Key slide switch
2. POWER VOLTAGE
Measurement position VF-VF VSS-VCC (*1)VL-VPR Power voltage 4.2Vac ~ 5.1Vac 5.7V ~ 6.6V 14V ~ 16V
AC input
LSI
Power supply line Signal line
Printer driver
Printer
Measure with the AC input voltage rating. (*1): Measurement of VL-VPR voltage must be performed with the PAPER FEED key being pressed.
s MEASURING PIN POSITION
VSS
VF
VF
VPR
VCC
VL
3. INK RIBBON REPLACEMENT
1. Remove the paper roll from the calculator. (Tear the paper and remove it from the print mechanism by using .) 2. Turn the power off before replacing ribbon. 3. Remove the printer cover by sliding it towards the back of the calculator. (Fig.1) 6. With the black side of the ribbon facing upwards, place one of the reels on the reel shaft on the right. (Fig.2) Make sure that the reel is securely in place.
Fig.2 7. Thread the ribbon around the outside of the metal guides. (Fig.3)
Fig.1 4. Remove the old ribbon by pulling it up. 5. Insert the new ribbon. Fig.3 8. Take up any slack by manually turning one of the reels. 9. Replace the printer cover. 10. Replace the paper roll.
EL-2631L/2615P BLOCK DIAGRAM
