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Reference Class A 6.0 with entire bank of 18 capacitors swelled up and 3 neighboring resistors charred. I have the ability to replace parts but was wondering what may have caused this or if something else may need to be replaced. I lent this amp to a friend about 10 years ago and just got it back--- of course he knows nothing about how it happened.

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  • Khan Powell Jan 03, 2011

    Hi,

    Thanks for responding. Are you familiar with this particular model of amp? Low ESR capacitors are used from the factory. I am looking for what may have caused this so I don't find and install a bunch of parts only to see them blow also. Any suggestions?

    Thanks again,

    khan

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  • 11,361 Answers

It is typical caps failure in the switching power supply due to high ESR that causes the caps temp to rise up. You should make sure to replace tthem with LOW ESR type. See pictures of bad caps in my albums.

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

Posted on Jan 03, 2011

  • Bud Martin
    Bud Martin Jan 05, 2011

    They may have used low quality Low ESR type, as you can see from my pictures in my bad caps album. Even MAC use low quality caps on its mother board and power supplies, same for DELL and other PC makers, there are millions of bad caps in circulation.
    You can learn more here: www.badcaps.net
    I only use PANASONIC FM/FC series.

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1 Answer

Visio VX32L has a black screen, appears to power on but picture.


Any swelling on a cap is bad sometime you wont see swelling ontop sometimes its on the bottom, I suggest replacing those caps then try again make sure you discharge the caps as well.
Also make sure its the right caps too!

1000uf 6.3volts or something like that. Ebay a good source for caps and amazon.

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PCM pinout diagrams
2001 silverado (Thanks Banker099)

Try this link for page below


wol_error.gifThis image has been resized. Click this bar to view the full image. The original image is sized 799x247 and weights 17KB.connectorc1pcm2001.gif

Powertrain Control Module (PCM) C1 (BLU)



Connector Part Information
• PCM Connector C1 Assembly 12191489

• TPA (BLU) 12176408

• Connector Cover 12191108

Pin
Wire Color
Circuit No.
Function

1
BLK/WHT
451
Ground

2
LT GRN
1867
12 Volt Reference

3
PNK/BLK
1746
Fuel Injector 3 Control

4
LT GRN/BLK
1745
Fuel Injector 2 Control

5-10
--
--
Not Used

11
LT BLU
1876
Knock Sensor 2 Signal

12
DK BLU/WHT
1869
CKP Sensor Signal

13
ORN/BLK
463
Requested Torque Signal

14
ORN/BLK
1061
UART Serial Data [Secondary]

15
DRK BLU/WHT
774
UART Serial Data [Tertiary]

16
--
--
Not Used

17
DK BLU
1225
Transmission Fluid Pressure Switch Signal B

18
RED
1226
Transmission Fluid Pressure Switch Signal C

19
PNK
439
Ignition 1 Voltage

20
ORN
440
Battery Positive Voltage

21
YEL
1868
Low Reference

22
--
--
Not Used

23
PPL
719
Low Reference

24
--
--
Not Used

25
TAN
1671
HO2S Low Signal [- Bank 2 Sensor 1]

25
TAN
413
HO2S Low Reference (Denso Sensors) HO2S Low Signal (Delphi Sensors)

26
TAN
1667
HO2S Low Signal [- Bank 2 Sensor 2]

26
TAN
413
HO2S Low Reference (Denso Sensors) HO2S Low Signal (Delphi Sensors)

27
--
--
Not Used

28
TAN/WHT
1669
HO2S Low Signal [- Bank 1 Sensor 2]

28
TAN
413
HO2S Low Reference (Denso Sensors) HO2S Low Signal (Delphi Sensors)

29
TAN/WHT
1653
HO2S Low Signal [- Bank 1 Sensor 1]

29
TAN
413
HO2S Low Reference (Denso Sensors) HO2S Low Signal (Delphi Sensors)

30
LT GRN
1478
Coolant Level Switch Signal

31
--
--
Not Used

32
BLK/WHT
771
Transmission Range Switch Signal A

33
PPL
420
TCC Brake Switch Signal

34
WHT
776
Transmission Range Switch Signal P

35
GRA
48
CPP Switch Signal

36
BLK
1744
Injector 1 Control

37
YEL/BLK
846
Injector 6 Control

38
PNK/WHT
1101
Damping Lift/Dive Signal

39
--
--
Not Used

40
BLK/WHT
451
Ground

41
BLK
407
Low Reference

41
GRA
720
Low Reference (w/o Delphi HO2S)

42
--
--
Not Used

43
RED/BLK
877
Fuel Injector 7 Control

44
LT BLU/BLK
844
Fuel Injector 4 Control

45
GRA
474
5 Volt Reference (FTP Sensor)

46
GRY
474
5 Volt Reference (TPS Sensor)

47
GRY
597
5 Volt Reference (MAP Sensor)

48
GRA
596
5 Volt Reference (EGR Sensor)

49 50
--
--
Not Used

51
DK BLU
496
KS [1] Signal

52
--
--
Not Used

53
BLK
470
Low Reference

54
BLK
452
Low Reference

55
BRN
1456
EGR Valve Position Signal

56
--
--
Not Used

57
ORN
440
Battery Positive Voltage

58
DK GRN
1049
ECM/PCM/VCM Class 2 Serial Data

59
YEL
710
Class 2 Serial Data

60
ORN/BLK
469
Low Reference

61
PNK/BLK
632
Low Reference

62
--
--
Not Used

63
GRA
720
Low Reference

63
TAN
413
HO2S Low Reference (Denso Sensors) HO2S Low Signal (Delphi Sensors)

64
--
--
Not Used

65
PPL
1670
HO2S High Signal [- Bank 2 Sensor 2]

66
PPL
1666
HO2S High Signal [- Bank 2 Sensor 1]

67
--
--
Not Used

68
PPL/WHT
1668
HO2S High Signal [- Bank 1 Sensor 2]

69
PPL/WHT
1665
HO2S High Signal [- Bank 1 Sensor 1]

70
BRN
1174
Oil Level Switch Signal

71
--
--
Not Used

72
YEL
772
Transmission Range Switch Signal B

73
BRN/WHT
633
CMP Sensor Signal

74
YEL
410
ECT Sensor Signal

75
PNK
1020
Off/Run/Crank Voltage

76
BLK/WHT
845
Fuel Injector 5 Control

77
DK BLU/WHT
878
Fuel Injector 8 Control

78
--
--
Not Used

79
WHT
687
3-2 Shift Solenoid Valve Control

80
ORN/BLK
510
Low Reference
wol_error.gifThis image has been resized. Click this bar to view the full image. The original image is sized 799x247 and weights 17KB.connectorc2pcm2001.gif

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