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  1. Folks, I replaced all the electrolytic capacitors in my SRM-600. I can't say for sure if this has happened before, but this (photo) capacitor at 10V 4700uF is heating up. Not very much, around 55C. The headphones aren't plugged in. Can you tell me if this capacitor is in normal operation? Does it have to warm up? My SRM-600 for 230V voltage. First, I supplied a cheap Jamicon TKR472M1AJ26 capacitor. It was heating up.Then I decided to place EEUFR1A472L Panasonic Low ESR capacitor. However, it's warming up, too. I checked the diodes next to it - they're not broke. On the cap about 7V. Any other caps running cold. Only 4700uF/10V running warm. I double-checked all capacitors parameters and they match (or exceed) the original: Original: ELNA LAH400V221MS36 220uF 400V 25х45mm/10mm <--- Rated ripple current (RRC Arms) = 0.87 Replacement: TDK/EPCOS B43642B9227M0 220uF 400V 25x35mm/10mm <--- RRC = 1.03 & ESR at 100 Hz = 460 & Impedance = 680 Original: ELNA RJ4 4700uF 10V 12.5x25mm/5.0mm <--- RRC = 1250 & ESR = 0.11 Replacement: Panasonic EEUFR1A472L 4700uF 10V 12.5x30mm/5.0mm <--- RRC = 3630 & Impedance = 0.013 Original: SANYO 35ME470HC 470uF 35V 10х16mm/5.0mm (S.E.8N Black 85°C Standard series) <--- RRC = 585 Replacement: TDK/EPCOS B41888C7477M000 470uF 35V 10х20mm/5.0mm (B41888C7477M000) <--- RRC = 1500 & ESR at 10 kHz = 0.050 & Impedance = 0.046 Original: ELNA RC3-16V470MF0 47uF 16V 85°C 6.3x5.0mm/2.5mm (RC3 F0 Blue 85°C) <--- RRC at 85°C = 70 Replacement: HITANO E5R 47uF 25V 105°C 6.3x5.0mm/2.5mm <--- RRC at 105°C = 60 Original: ELNA RC3-50V100MF0 10uF 50V 85°C 6.3x5.0mm/2.5mm (RC3 F0 Blue 85°C) <--- RRC at 85°C = 40 Replacement: ELZET CD50H 22uF 50V 105°C 6.3x5.0mm/2.5mm <--- RRC at 105°C = 40 Before the replacement, I did not check if the 4700uF/10V had been warmed. This could be his normal operating condition. It is simply not clear to me which components of the circuit can affect it: from the transformer comes two BLU-wires at 6.3V AC current, then there are two diodes in parallel converting to DC current, and then there is a 4700uF/10V capacitor, which receives these 6.3VDC. There is simply nothing to break. Any suggestion?
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