Service Precautions; Notes On Soldering; Notes On Replacing - Pioneer SC-71 Service Manual

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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.
A
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 °C.
Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 °C 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).
B
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 NOTES ON REPLACING

The part listed below is difficult to replace as a discrete component part.
When the part listed in the table is defective, replace whole Assy.
PCB ASSY
ASSY NAME
Part No.
C
DIGITAL
MAIN_L AWX1353
ASSY
D
E
D-AMP_SS
AWX1425
ASSY
AWX1455
(SC-71)
DISPLAY
AWX1507
ASSY
(SC-1228-K,
F
SC-1223-K)
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Ref No. FUNCTION
IC451 3CH SW POWER SUPPLY IC
IC903 HDMI SW IC
IC1204 VIDEO PROCESSOR IC
IC1212 DDR IC
IC1216 VTT/VREF REGULATOR IC
IC1602 HDMI INTERFACE IC
IC9002 DSP IC
IC9203 LAN PHY IC
IC9204 MEDIA PROCESSOR IC
IC9206 APPLE AUTHENTICATION IC
IC9602 HDMI INTERFACE IC
JA1601
HDMI Connector
JA1603
JA9201 USB Connector
JA9202 LAN Connector
JA9601
JA9602
JA9603
JA9604
HDMI Connector
JA9605
JA9606
JA9607
JA9620
Q4101
Q4102
Q4201
Q4202
Q4301
Q4302
Q4401
FET
Q4402
Q4501
Q4502
Q4601
Q4602
Q4701
Q4702
IC6001 FLASH BLANK UC IC
2
3
Part No.
TPS65251RHA-TLB
SII9587CNUC-3-K
88DE2750-K
H5PS5162GFR-S5C-K
BD3539NUX-TLB
SII9616CTUC-K
D808K013DPTP400-K
LAN8720A-CP-TBB
DM860A-K
H337S3959-TBB
SII9575CTUC-K
AKP7268-A-K
DKB1106-A
AKN7114-1
AKP7268-A-K
IRF6775MPBF-TRB
R5F100MHAFA-K
SC-71
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4
Remarks
IC with heat-pad
IC BGA type
IC with heat-pad
IC BGA type
IC with heat-pad
JACK with Cu-through-hole & SMD type
JACK with Cu-through-hole & 6 pin
JACK with Cu-through-hole & 10 pin
JACK with Cu-through-hole & SMD type
Land is under parts
Software is not written
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