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K4102

ILLUSTRATED ASSEMBLY MANUAL H4102IP-1

Total solder points: 79

Difficulty level: beginner 1  2  3  4  5  advanced

GUITAR PREAMPLIFIER WITH HEADPHONE OUTPUT

Summary of content (12 pages)

PAGE 1
Total solder points: 79 Difficulty level: beginner 1 2 3 4 5 advanced GUITAR PREAMPLIFIER WITH HEADPHONE OUTPUT K4102 rbing ithout distu w r ita u g e Practice th others.
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Features & Specifications Features: An electric guitar cannot be connected to just any amplifier or audio installation. This preamplifier has been designed for this purpose and provides you with a headphone output, allowing you to practice without disturbing others. Moreover, it is fitted with a special device for tone adjustment, allowing anyone to create their personal sound. sound adjustment adjustable input sensitivity low noise housing included Specifications: Headphones output: max.
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Assembly hints 1. Assembly (Skipping this can lead to troubles ! ) Ok, so we have your attention. These hints will help you to make this project successful. Read them carefully. 1.1 Make sure you have the right tools: • A good quality soldering iron (25-40W) with a small tip. • Wipe it often on a wet sponge or cloth, to keep it clean; then apply solder to the tip, to give it a wet look. This is called ‘thinning’ and will protect the tip, and enables you to make good connections.
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Assembly hints 1.3 Soldering Hints : 1- Mount the component against the PCB surface and carefully solder the leads 2- Make sure the solder joints are cone-shaped and shiny 3- Trim excess leads as close as possible to the solder joint REMOVE THEM FROM THE TAPE ONE AT A TIME ! DO NOT BLINDLY FOLLOW THE ORDER OF THE COMPONENTS ONTO THE TAPE.
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Construction 1. Zenerdiode. Watch the polarity! RV1 : 100K RV2 : 1K ZD1 : 4V7 1/4W Resistors R... R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 : : : : : : : : : : : 5. Resistor trimmers ZD... CATHODE 2. 3.
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Construction 8. RCA connectors 10. LED 12. Battery snap E... ... LD... 23mm 18mm 0.9" CATHODE J1 GUITAR IN J2 LINE OUT LD1 : 3mm red 9. Headphones connector L' J... R 11. IC. Watch the position of the notch! The connection leads are first plaited through the openings to reduce pulling. The red is connected to the "+" and the black to the "-". RED BLACK R' L J3 : 3,5mm stereo phone Fig 1.
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Assembly in the housing 13. Assembly in the housing Attach the sticker showing the connections to the housing, fig 4.0. Mount three spacers to the bottom of the housing, together with a shakeproof washer and an M3 countersunk bolt, see figure 2.0 4mm M3 BOLT PCB 8mm M3 SPACER LOCK WASHER HOUSING 6mm M3 BOLT Fig 2.0 Mount the PCB on the spacers using the three M3 bolts Click the shaft into the tone-control potentiometer and mount the knob on the shaft, fig 3.
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Assembly in the housing Tone control Power led Power on/off Headphones Level adjustment Output Fig 4.
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Test & use 14. Test & use Connect a 9V battery and switch the equipment on. The LED should normally light up. This LED is also used as a "battery low" indication. Turn potentiometer RV1 to the middle of its adjustment range and connect a pair of headphones to the unit. A slight hum should be heard in the headphones when the central terminal of the input connector is touched. Turn the tone control RV2 clockwise and slight noise should be heard.
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Schematic diagram 15. Schematic diagram. SW1 +9V BATTERY GND C12 C6 R9 5 6 LD1 ZD1 C5 GUITAR.IN J1 L-HEADPHONE C8 R1 C1 C3 LEVEL.ADJ R5 R2 C7 J3 C11 R-HEADPHONE R3 R4 J3 GND R10 3 1 2 A1 RV1 GND 10 C10 8 7 A2 4 C2 C9 R8 R11 R6 C4 TONE CONTROL R7 LINE.
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PCB 16.