bxi2608d hifonics

[Perry Babin]

Add BD139 and BD140 to the following list.

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Generic (applies to MANY amps):
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* For amps that use SMD resistors, keep a good selection of sub 1000 ohm 0805 resistors and sub 500 ohm 1206 resistors.

* For most all of the amps below, the IRF3205 is a good sub for PS FETs rated greater than 50 amps. The IRFZ44 is a good sub for PS FETs rated for 50 amps or less.

* For amps greater than 10 years old, you may want to replace all of the electrolytic capacitors. These will vary too greatly to include suggestions for replacements here.

* PS driver ICs TL594 and SG3525 will cover most amps. SG3524 and SG3526 are also common but are rarely needed.

* For generic amplifiers, the power supply gate resistors often open or change value. Stock both 1/4 watt and 1/8w of 10, 27, 33, 47, 68 and 100 ohm resistors.


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Rockford (older punch BBQ and Batman style amps):
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IRF540
IRF9540

IRF640
IRF9640 (larger amps)

0.1 ohm 3 watt dale 1% resistors (LVR03R1000FB12)

MMBTA06
MMBTA56

20 ohm SMD 0805
10 ohm SMD 0805
100 ohm SMD 0805
51 ohm SMD 0805
39 ohm SMD 0805

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Rockford (newer Px002, etc.):
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FQA36P15
FQA28N15

0.1 ohm 3 watt dale 1% resistors (LVR03R1000FB12 - very good for any amp needed a 2-3 watt emitter/source resistor)

MMBTA06
MMBTA56

20 ohm SMD 0805
10 ohm SMD 0805
22.1 ohm SMD 0805
100 ohm SMD 0805
51 ohm SMD 0805
39 ohm SMD 0805

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Rockford (older BD):
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IRF3415
IRF6215

15 ohm 1/4w axial resistors
24.1 ohm 1/4w axial resistors

10 ohm SMD 0805

MPSA56
MPSA06

TL072CD
LM6361
LM6171BIN
LM6172IM
MIC4420CT
HCPL2211

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Kicker (older ZR series):
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TIP35C
TIP36C

RFG70N06

TL071CD
TL072CD

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MTX:
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IRF3415 (for smaller class D outputs like in the 6500d)

MPSA56
PZTA06
PZTA56

10 ohm SMD 0805
47.5 ohm SMD 0805

NE5532P
NE5532D

ES2D diodes

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Orion (older):
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2N6488
2N6491

NDP7060

10 ohm 1/4w axial resistors

MPSA56
MPSA06

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JL Audio
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IRF540

IRFZ44N

47.0 ohm 1206 SMD resistor
75.0 ohm 1206 SMD resistor
100 ohm 1206 SMD resistor
200 ohm 1206 SMD resistor

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SoundStream (older)
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TIP102
TIP107

2SA1562
2N2222

0.27 ohm 2w axial resistors
3.3 ohm 1/4w axial resistors
0.1 ohm 3 watt dale 1% resistors (LVR03R1000FB12)
34 ohm 1/4w axial resistors

[DREW028]

Thank you for all your help!

[DREW028]

On r60a I reads 4.7v on r60 I'm reading 1.4v is that normal? (Sides closest to drivers)

[Perry Babin]

Probably not. Are the drivers identical?

Have you removed them to confirm that all are in good condition?

[DREW028]

I used the bd139 and 140, and I have not removed them yet. I did remove the side of the resistors closestto the drivers and the voltages went up.


I've been staring at this too long il check them tomorrow. Thanks Perry

[Perry Babin]

Those feed the drivers. I'd suspect a defective driver, a driver that's installed backwards or one that's in the wrong location.

[DREW028]

Could you verify q7 q7a q8 q8a? Maybe I wrote them down wrong.

[Perry Babin]

The center legs of the PNP drivers (BD140) will be directly connected (0 ohms) to the amp's ground terminal.

[DREW028]

I had the order correct i think i might have installed them backwards.

[Perry Babin]

The two resistors connect to the bases (pin 3) of the drivers.