Service Precautions; Notes On Soldering; Service Notice - Pioneer DDJ-T1 Service Manual

5

1. SERVICE PRECAUTIONS

1.1 NOTES ON SOLDERING

• 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
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 SERVICE NOTICE

• For checking of audio and operating elements, the DJ application (TRAKTOR) included with this product is used.
TRAKTOR must be installed in your PC. For details on installation, see "5.4 HOW TO CHECK OPERATIONS USING
THE TRAKTOR SOFTWARE."
For connection of this product with a PC, be sure to use the supplied USB cable (registered jig tool), whose operation
with this product is guaranteed.
Voltage Monitoring
This unit always monitors for power failure and will shut itself off immediately after an error is detected. All LEDs are unlit after
an error is generated. After the unit shuts itself off because of an error, disconnect the AC adapter and USB cable and wait at
least 1 minute before turning the unit back on. Repair the unit according to the diagnostic procedures described in
"5.3 VOLTAGE MONITORING."
Limitations when the unit is operating on USB-bus power
There are some limitations in operations of this unit while it is operated on USB-bus power, as shown below.
• The JOG dial indicator does not light.
• Lighting of the indicators (excluding that for the JOG dial) becomes dim.
• The AUX IN and MIC connectors are disabled.
• The sound volume through the headphones is reduced.
On the EEPROM on the UCOM ASSY
No program has been stored in the EEPROM (IC2003) on the UCOM Assy (blank ROM) when it is supplied as a part for
service.
After the EEPROM is replaced, be sure to copy the program for the USB controller to it. For details, see "8.4 Copying the
Program for the USB Controller."
Replacement of the MAIN_UCOM
When replacement of the MAIN_UCOM (IC701) is required, order a microcomputer dedicated for service (PEG850A8-K).
5
6
DDJ-T1
6
7
7
8
A
B
C
D
E
F
5
8