LaserActive:PAC-S10 Audio Circuit Service Bulletin Update: Difference between revisions
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(Created page with "According to a service bulletin from Pioneer, early revisions of the PAC-S10 and S1 needed adjustments to the audio circuit to avoid distorting high frequency audio "when a certain Sega game software is played." However, this distorted audio affects all games and it is recommended to perform the resistor/capacitor replacements. ==MDFourier Plots== <gallery> Example.jpg|Caption1 Example.jpg|Caption2 </gallery> ==Installation== You will need the following parts for this...") |
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According to a service bulletin from Pioneer, early revisions of the PAC-S10 and S1 needed adjustments to the audio circuit to avoid distorting high frequency audio "when a certain Sega game software is played." However, this distorted audio affects all games and it is recommended to perform the resistor/capacitor replacements. | According to a service bulletin from Pioneer, early revisions of the PAC-S10 and S1 needed adjustments to the audio circuit to avoid distorting high frequency audio "when a certain Sega game software is played." However, this distorted audio affects all games and it is recommended to perform the resistor/capacitor replacements. | ||
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Note: The bulletin also indicates that the large surface mount electrolytic AC coupling caps (C117 and C21) are to be replaced with 1 uF, 50V rated caps. This is not required, but recommended. | Note: The bulletin also indicates that the large surface mount electrolytic AC coupling caps (C117 and C21) are to be replaced with 1 uF, 50V rated caps. This is not required, but recommended. | ||
Replace the parts in the image below: | |||
<gallery> | |||
Example.jpg|Caption1 | |||
Example.jpg|Caption2 | |||
</gallery> | |||
Using the parts above, replace the parts as indicated: | Using the parts above, replace the parts as indicated: | ||
Revision as of 20:02, 27 June 2022
According to a service bulletin from Pioneer, early revisions of the PAC-S10 and S1 needed adjustments to the audio circuit to avoid distorting high frequency audio "when a certain Sega game software is played." However, this distorted audio affects all games and it is recommended to perform the resistor/capacitor replacements.
MDFourier Plots
- Example.jpg
Caption1
- Example.jpg
Caption2
Installation
You will need the following parts for this modification:
- 33K 0805 1/10W+ Resistor (Qty 4)
- 100K 0805 1/10W+ Resistor (Qty 2)
- 27K 0805 1/10W+ Resistor (Qty 2)
- 22K 0805 1/10W+ Resistor (Qty 2)
- 3.3K 0805 1/10W+ Resistor (Qty 2)
- 120pF 0805 25V+ Capacitor (Qty 2)
- 820pF 0805 25V+ Capacitor (Qty 2)
Note: The bulletin also indicates that the large surface mount electrolytic AC coupling caps (C117 and C21) are to be replaced with 1 uF, 50V rated caps. This is not required, but recommended.
Replace the parts in the image below:
- Example.jpg
Caption1
- Example.jpg
Caption2
Using the parts above, replace the parts as indicated:
- R31, R58, R32, R59 - 33K
- R33, R34 - 100K
- R131, R52 - 27K
- R38, R40 - 22K
- R39, R41 - 3.3K
- C16, C17 - 120pF
- C33, C34 - 820 pF