Section 4: Building The Updated Circuit Boards; Install The ¼ Watt Resistors; Figure 7-The First Four Resistors Are Installed With Leads Bent On The Back Side, But Not Yet - DYNACO STEREO 120 Updating Instructions

Section 4: Building the Updated Circuit Boards

The next few pages detail the process of building the circuit boards. The general strategy
starts with the components that lay closest to the board, working your way toward the
taller components. In general, we will:
1. Install the resistors
2. Install the small capacitors
3. Install the diodes
4. Install the LEDs
5. Install the big resistor
6. Install the medium size capacitors
7. Install the transistors
8. Install the big capacitor
9. Wind and install the output inductor.
10. Tack the LM3886 in place.
Install the ¼ Watt Resistors
Install the resistors, placing the body on silk screen side of the board, and the leads
through the indicated holes. Bend the leads over on the back of the board to keep the
resistors from falling out until your solder them in place. Try to bend the leads in a
direction that won't lead to solder bridges between traces that should remain
disconnected.
We recommend the following procedure:
1. Insert all the resistors of the same value, e.g. R14, R19, R20, and R21.
2. Bend the leads as described above.
3. Solder the leads on the back of the board.
4. clip the leads.
Figure 7-The first four resistors are installed with leads bent on the back side, but not yet soldered.
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