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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Brother BR-3 "Domino II" stereo Mystery Part/schematic needed
Working on an early 70's "Made in Japan" combination stereo by Brother
International. Model number on the rear jack panel states "Model BR-3". Has top-mounted standard BSR record changer and AM/FM stereo tuner/8-track control also top-mounted. It rather looks like one of those cheap generic drop-ins that they put in consoles in the 70s. Etched on the circuit boards of the amplifier is "SC-12" in several places. Amplifier got shorted somewhere in its lifetime, cooking the output transistors (2SC699A and 2SC1223). There's a small epoxy part that looks like a small round mauve blob with two leads and no ID whatsoever. There's nothing silkscreened on the board at all and no identifying marks on the companion part for the good channel. It goes between the collectors of each half of the output transistors. This mystery part on the bad channel turned to charcoal. Any ideas what the heck this is? Ideally I'd like to find a schematic for this stereo, but I haven't had any luck. Suggestions for bringing it back to life? Thank you! Mike C |
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"ha1156w" wrote in message oups.com... There's a small epoxy part that looks like a small round mauve blob with two leads and no ID whatsoever. There's nothing silkscreened on the board at all and no identifying marks on the companion part for the good channel. It goes between the collectors of each half of the output transistors. This mystery part on the bad channel turned to charcoal. Any ideas what the heck this is? Silicon diode. Use a IN4001 or similar. -- N |
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