Alpes Lasers . TC-3 Datasheet download pdf (Page 106)

Chapter 7: Maintenance

6. Oscillator check (refer to ﬁgure 7.13): measure the frequency on the pin 7 of

U13 (1); the value must be 28KHz + /- 3KHz.

7. Current/Voltage ratio adjustment (refer to ﬁgure 7.13)

a) Adjust the trimmer P4 (6) in order to read B4 = 0.6V (4).

b) Set the selector (5) to mode Setting +I: the LCD screen should display

1.00 A.

Note: If it is not the case, adjust it with P2 (2).

c) Adjust the trimmer P4 in order to read B4 = 3.0 V: the LCD screen should

display 5.00 A.

Note: If it is not the case, adjust it with P2 (2). Example : 0,6 V ⇒ 0,99 A

and 3V ⇒ 4,99 A.

d) Set the switch on the front panel to mode Setting -I.

e) Repeat steps [2] and [4] for P5 (7) and B5 (3).

Figure 7.13.: TCU main board, oscillator check (left), current/voltage ratio adjustment.

(right).

96 QCL user’s manual v3.1.3

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Alpes Lasers . TC-3 Datasheet Page 106