Read Sony XM-GTX6041 Service Manual online
XM-GTX6041/GTX60412
3
SECTION 1
SERVICING NOTES
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong
viscosity
Unleaded solder is more viscous (sticky, less prone to fl ow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
•
Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
also be added to ordinary solder.
CONFIRMING THE OPERATION (E and Indian models)
Please confi rm the car audio unit works even if REM output is not
connected when you connect this unit with the car audio unit by
the HIGH LEVEL input.
Please confi rm the car audio unit works even if REM output is not
connected when you connect this unit with the car audio unit by
the HIGH LEVEL input.
PROTECTOR OPERATION CHECK
Thermal Protect
1. Short across TH501 with the power on.
2. Verify that the protector is operated and D918 illuminates
1. Short across TH501 with the power on.
2. Verify that the protector is operated and D918 illuminates
green. When input the signal and verify that there is no output
on the SP-OUT even when the volume is increased.
on the SP-OUT even when the volume is increased.
3. Verify that the protector is released and there is an output on
the SP-OUT when the short is removed.
4. Likewise, perform items 1 to 3 for TH502 and TH503.
Over Current Protect
1. Short between the positive and negative sides of the speaker
1. Short between the positive and negative sides of the speaker
output terminals CN903 and CN904 with the power on.
(Perform this shorting for each channel on FRONT and
REAR.)
REAR.)
2. Verify that the protector is operated and D918 illuminates red.
3. Verify that the protector is not released and D918 remains red
3. Verify that the protector is not released and D918 remains red
even when the short is removed.
4. Verify that the protector is released and D918 illuminates
green when the power is turned off and then on again.
Offset Protect
1. Short between the +12V terminal of CN904 and the (L+R) + or
1. Short between the +12V terminal of CN904 and the (L+R) + or
(L+R) – of the speaker output terminal CN904.
(Short between +12V terminal and (L+R) + and between +12V
terminal and (L+R) –.)
terminal and (L+R) –.)
2. Verify that the protector is operated and D918 illuminates red.
3. Verify that the protector is not released and D918 remains red
3. Verify that the protector is not released and D918 remains red
even when the short is removed.
4. Verify that the protector is released and D918 illuminates
green when the power is turned off and then on again.
NOTE FOR REPLACEMENT OF THE TRANSISTORS
The transistors Q110, 111, 210, 211, 310, 311, 410 and 411 have
two different ranks: P rank and Y rank.
The rank of these transistors need to be selected properly accord-
ing to each channel. When replacing any one of these transistors,
check its rank and replace with the appropriate transistor of the
same rank.
The transistors Q110, 111, 210, 211, 310, 311, 410 and 411 have
two different ranks: P rank and Y rank.
The rank of these transistors need to be selected properly accord-
ing to each channel. When replacing any one of these transistors,
check its rank and replace with the appropriate transistor of the
same rank.
Rank
Q110, 210, 310, 410
Q111, 211, 311, 411
P
2SC5100-P
2SA1908-P
Y
2SC5100-Y
2SA1908-Y
DISCRIMINATION:
A1908: 2SA1908
C5100: 2SC5100
C5100: 2SC5100
P: RANK P
Y: RANK Y
Y: RANK Y
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