Service Precautions; Notes On Soldering; Notes On Replacing; Caution - Pioneer SC-37 Service Manual

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1. SERVICE PRECAUTIONS

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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.
C
ASSY NAME PCB ASSY Part No.
TE
L 13942296513
AWX9620
(SC-37)
D
DIGITAL
MAIN ASSY
AWX9621
(SC-35,SC-1525-K)
E

1.3 CAUTION

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• Discharging
Before starting the diagnosis, wait for three minutes until the electricity of the unit is discharged.
• Ground Points
F
Please refer to page 74, "Ground Points".
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Ref No.
IC101
IC904 HDMI Reciver
IC1204 Digital Video Format Converter
IC1212 DDR2 SDRAM
IC9202
IC9503 HDMI Processor
IC9802
IC9803
IC9804
IC9805
IC9810
IC9811
C9844
C9845
IC101
IC904 HDMI Reciver
IC1204 Digital Video Format Converter
IC1212 DDR2 SDRAM
IC9506 Ethernet Controller
IC9804
IC9810
IC9811
C9844
C9845
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2
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8
Parts that is Difficult to Replace
FUNCTION Part No.
MAIN CPU UPD61283F1-407LU2A BGA
SII9233ACTU
Q Q
88DE2750
3 6 7 1 3
EDE5116AJBG-8E-E
2NDDSP D787E001BRFP250L
DM850E-UFS
Regulator NJM2846DL3-33
Regulator NJM2846DL3-18
Regulator NJM2846DL3-18
Regulator NJM2846DL3-33
Regulator MM1701WH
Regulator NJM2846DL3-33
ACH7309
Capacitor
ACH7314
Capacitor
MAIN CPU UPD61283F1-407LU2A BGA
SII9233ACTU
88DE2750
EDE5116AJBG-8E-E
LAN9211-ABZJ
NJM2846DL3-18
Regulator
Regulator MM1701WH
Regulator
NJM2846DL3-33
Capacitor ACH7309
Capacitor ACH7314
u163
.
SC-37
3
4
2 9 9 4 2 8
Remarks
IC with heat-pad
BGA
1 5 0 5 8 2 9 9 4
BGA
IC with heat-pad
IC with heat-pad
IC with heat-pad
IC with heat-pad
IC with heat-pad
IC with heat-pad
IC with heat-pad
IC with heat-pad
Land of component lower part
Land of component lower part
IC with heat-pad
BGA
BGA
IC with heat-pad
IC with heat-pad
IC with heat-pad
IC with heat-pad
Land of component lower part
Land of component lower part
m
co
4
9 9
2 8 9 9