User manual VELLEMAN K8021 ILLUSTRATED ASSEMBLY MANUAL

[. . . ] · Small blade and phillips screwdrivers. A basic range is fine. For some projects, a basic multi-meter is required, or might be handy 0. 0 00 1. 2 Assembly Hints : Make sure the skill level matches your experience, to avoid disappointments. Read and understand the entire step before you perform each operation. Perform the assembly in the correct order as stated in this manual Position all parts on the PCB (Printed Circuit Board) as shown on the drawings. [. . . ] Push button Mount them straight against the PCB surface ! q q q q q q q q T1: BC557 T2: BC557 T3: BC557 T4: BC557 T5: BC557 T6: BC557 T7: BC557 T8: BC557 q q q q q SW1: TS-04PV SW2: TS-04PV SW3: TS-04PV SW4: TS-04PV SW5: TS-04PV Remark: The metal part of these buttons are used as jump wire. Be sure not to test or use the unit without soldering these push buttons. 12. Mount him straight against the PCB surface ! L' SK. . q RV1: 100K q RV2: 100K J. . . R R' L q SK13: JCF3. 5 (3. 5mm jack) 12 Construction 15. Mount them straight and against the PCB 17. The back side corresponds to the thick line. VR. . . q q q q q q SK1: MJ-523AG/R RED SK2: MJ-523AG/R RED SK3: MJ-523AG/R RED SK4: MJ-523AG/R RED SK5: MJ-523AG/R RED SK6: MJ-523AG/R RED q VR1 UA7815 q VR2 UA7915 q VR3 UA7805 16. Transformer. C. . . q q q q q q q q q q q q q q q q C32: 47µ C33: 47µ C34: 100µ C35: 100µ C36: 100µ C37: 470µ C38: 470µ C39: 470µ C40: 470µ C41: 470µ C42: 1000µ C43: 1000µ C44: 1000µ C45: 1000µ C46: 1000µ C47: 1000µ TRANSFORMER q TR1: TR8021, 9V-2x18V/ 6VA 13 Construction 19. Mains voltage selection RV. . . q RV3: STRK27103 (2x50K ALPS) CAUTION: This is a high quality potentiometer, handle it with care. Follow the mounting instructions exactly and in order!1. Mount the support bracket onto the potentiometer. 2. Mount the potentiometer onto the PCB, using two 6mm (0. 23") screws and M3 nut. Do not solder the potentiometer connections yet ! Use a piece of isolated brown wire to select the mains (outlet) voltage, as indicated on the PC board. q For 115Vac (100 to 120Vac) A jumper between A-B, and a jumper between C-D. A B C D q For 230Vac (220 to 240Vac) A jumper between B-C. B C Using a black marker, erase the not used voltage at the back of the unit. 21. Mains voltage connection preparation q Connect a 10cm blue wire to the point N of SK12. q Connect a 10cm brown wire to the point L of SK12. q Connect a 10cm yellow/green wire to the earth point of SK12. Later these connection will be soldered to the mains connector. 14 Construction 22. Short lead = Cathode or-- ! LD. . . CATHODE CAUTION: After bending the leads the long appearing lead will be the cathode! IMPORTANT Mount these LED's exactly like in the Next: Solder one lead, and check the drawing, otherwise some LED's will position, if necessary correct by heat- not fit correctly in the front panel. Please also use the front panel as a positioning reference. Last: Solder the second connection. First: Bend the leads exactly like the drawing. q LD7 L-424YDT 3mm C q q q q q q LD1 L-424YDT LD2 L-424YDT LD3 L-424YDT LD4 L-424YDT LD5 L-424YDT LD6 L-424YDT C FIG. Mounting the sub PCB support q Mount four 2cm (0. 8") M3 spacers at the indicated positions using four 6mm (0. 23") M3 screws. 16 Enclosure preparation 24. [. . . ] Push and hold the CD input selector button, the +6dB LED should lit. Use a multimeter and set it to the lowest voltage range (2Vdc or lower). Measure between GND (the metal bracket of the potentiometer can be used) and J8 (Left channel offset adjustment). Adjust the offset trimmer (next to IC2) until the meter indicates around 0V 7. [. . . ]