Service Precautions; Notes On Soldering; About Voltage Monitoring; Note On Replacement Of The Fl Display In The Pnlb Assy - Pioneer CDJ-350 Service Manual

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1. SERVICE PRECAUTIONS

1.1 NOTES ON SOLDERING

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• For environmental protection, lead-free solder is used on the printed circuit boards mounted in this unit.
Be sure to use lead-free solder and a soldering iron that can meet specifications for use with lead-free solders for repairs
accompanied by reworking of soldering.
• Compared with conventional eutectic solders, lead-free solders have higher melting points, by approximately 40 ºC.
Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 ºC in general, although
the temperature depends on the heat capacity of the PC board on which reworking is required and the weight of the tip of
the soldering iron.
Do NOT use a soldering iron whose tip temperature cannot be controlled.
Compared with eutectic solders, lead-free solders have higher bond strengths but slower wetting times and higher melting
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temperatures (hard to melt/easy to harden).
The following lead-free solders are available as service parts:
• Parts numbers of lead-free solder:
GYP1006 1.0 in dia.
GYP1007 0.6 in dia.
GYP1008 0.3 in dia.

1.2 ABOUT VOLTAGE MONITORING

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This unit always monitors for power failure and will shut itself off immediately after an error is detected. If an error is generated,
the STANDBY LED will flash after the unit shuts itself off. After the unit shuts itself off because of an error, unplug the AC power
cord and wait 1 minute before turning the unit ON by pressing the STANDBY/ON key.
Repair the unit, according to "5.5 ABOUT VOLTAGE MONITORING."

1.3 NOTE ON REPLACEMENT OF THE FL DISPLAY IN THE PNLB ASSY

The fluorescent (FL) display on the control panel is attached to the board, using double-back tape. When replacing the
FL display, new double-back tape is required. This part is not supplied as a service part, but we recommend using
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double-back tape (part No. GYH1033) as a general-purpose part for service.
You can also use the double-back tape specified below, if available:
Manufacturer: 3M, Tape width: 5 mm, Model No.: Y-4300K-08 and Y-4609
Or, tape that uses acrylic foam as a base material, with tape thickness of 0.8 mm, and with the peel force
in 90° orientation (glass) of 20 N/cm or greater
Three pieces of double-back tape with the size of 5 mm × 30 mm are required. First attach the pieces of tape to the places
on the back of the FL display, as shown in the figure below, then attach it to the board.
Be careful when working with double-back tape, because its adhesion strength is very high.
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FL (face side)
30 mm
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6
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2
PNLB Assy
5 mm
CDJ-350
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3
FL (back side)
Double-back tape
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4
Double-back tape
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