20
Front Panel Circuit Board – Rear View
(1) Install the following 1/4 Watt metal film resistors and the 5 K
Ω
trimpot onto the
circuit board. Note that some resistors mount on the rear side of the board, as indicated on
the silkscreening. Make certain the resistor bodies lie flat against the board before
soldering and align all the resistor color codes in the same direction.
R302-R304
2.2 K
Ω
(red-red-red)
R305-R311
1000
Ω
(brown-black-red)
R312
22 K
Ω
(red-red-orange)
R313
220 K
Ω
(red-red-yellow)
R314
4.7 K
Ω
(yellow-violet-red)
R315,R317,R318
10 K
Ω
(brown-black-orange)
R316
10
Ω
(brown-black-black)
R301
5 K
Ω
Trimpot
(2) Install the following ten blue epoxy-dipped capacitors and one electrolytic capacitor
onto the circuit board. Make sure you install the capacitors on the front or rear side, as
indicated by the silkscreening, and that you observe the polarity of the electolytic
capacitor.
C301-C307
1000 pF (marked 102 – blue epoxy-dipped)
C308, C309 47 pF (marked 470 – blue epoxy-dipped)
C310
0.1
µ
F (marked 104 – blue epoxy-dipped)
C311
1.0
µ
F electrolytic (observe polarity when installing)
(3) Install the 480 kHz ceramic resonator Y301 on the rear side of the circuit board. Bend
the two tabs down, as shown below, so the resonator lies flat against the outline on the
circuit board.
