3 - Clock PCB assembly
Re: Clock PCB assembly
Fit the mustard/beige resin dipped 22p (marked 220) or 33p (33) capacitors x2 in locations marked for C7 and C8:
Re: Clock PCB assembly
Fit the aluminium can 2.2u 200/250V capacitor in the location marked for C10 as shown - the white bar on the side of the capacitor indicates the negative- terminal and faces to the TOP:
Re: Clock PCB assembly
Fit the green or black aluminium can 470u or 330u capacitor in the location marked for C5 as shown: NOTE this is polarised, the negative- terminal is marked with a white band.
Re: Clock PCB assembly
Fit the green resin 4n7 capacitor in the location marked for C3 as shown:
Re: Clock PCB assembly
Fit the remaining black plastic transistor marked 'MPSA42' 'A42' or 'KSP42' in the location marked for T11 as shown: NOTE this are polarised and must be fitted the right way round. There is a flat mark on one side of the body, this flat side faces to the RIGHT of the PCB when viewed as shown in the photograph.
Re: Clock PCB assembly
That's BAG1 finished for now, next fit the IC sockets from BAG2:
Re: Clock PCB assembly
Fit T12 (the square black plastic 3 legged part), bending the end 3mm of its legs down 90 degrees to fit in the holes. Make sure it lies flat on the PCB and solder the tab on the top first, then the three legs. Some versions may have the centre leg missing, don't worry just solder the 2 outer legs and the tab.
DON'T FORGET TO SOLDER THE TAB! it acts as a heatsink connection to the PCB.
DON'T FORGET TO SOLDER THE TAB! it acts as a heatsink connection to the PCB.
Re: Clock PCB assembly
Fit the plastic IR LED in the space marked D8 as shown. NOTE this is polarised and must be fitted the right way round. There is a flat mark on the side of the LED body,
The flat side (Short leg) faces to the LEFT (LED8) of the PCB when viewed as shown in the photograph.
The flat side (Short leg) faces to the LEFT (LED8) of the PCB when viewed as shown in the photograph.
Re: Clock PCB assembly
Fit IC4 as shown (the domed black plastic 3 legged block). IC4 is vertical and faces down. Twist it slightly to face to the right.
NOTE: As the orginal Sharp part is becoming harder to find it has been replaced with another silver metal-cased device, marked CHQ1838. IC4 will always be supplied in the pink antistatic bag.
NOTE: As the orginal Sharp part is becoming harder to find it has been replaced with another silver metal-cased device, marked CHQ1838. IC4 will always be supplied in the pink antistatic bag.
Re: Clock PCB assembly
Now fit T13 (2N7000) - it looks the same as T1-11 so is packed in the second bag to avoid it being mixed up. The flat edge faces RIGHT.
