Which board are you referring to? I can check my parts list. Don't remember off hand if I did or didn't.I was going to ask you Steve did you replace those grey tin film caps I see on other rebuild that lots of people are not replacing them , just curious about the sound impact,my 2325 is not working until I rebuild it so I can't tell what a 2325 sounds like
Denis
Phono Stage (P400)
P400 board in original state
P400 board restored/upgraded
The stock capacitors in the input high-pass filter (C401, C402) were 1.0µF tantalum capacitors and these were replaced with 1.0µF Panasonic polypropylene film capacitors. The electrolytic capacitors C403/C404, which determine the low end roll-off of the RIAA equalization, were originally 47µF/16V polarized low leakage types. Their replacements were bipolar Nichicon ES capacitors of the same capacity. The local filtering/decoupling capacitor, C413, was a 100µF/35V and was replaced with a 270µF/50V low ESR type (note that the voltage rating should be increased since this capacitor is subject to ~34V). The original polyester film capacitors at the output, C414/C415, were upgraded to polypropylene film types. The failure-prone 2SC458 transistors (H405, H406) were replaced with KSC1845 transistors (note that the pin-order for the original 2SC458 is "BCE" whereas that for the KSC1845 is the common standard "ECB"). The 1S-2473 diodes (H407, H408) were replaced with 1N4148 diodes and the failure-prone VD1212 dual diode (H409) was replaced with a pair of 1N4148 diodes in series.
CBE Pinout.Fairchild BC548C
You don't know what you get with NTE, they are re branded parts from who knows where, sometimes they work, sometimes don't.NTE199l
I...The phono section sounds great to me and is very quiet. But I do have a situation where the volume has to be turned up 15-20% if you go from tuner to phono. I didn't listen to the unit other than just to confirm it worked before the restoration, so I never knew if this volume difference existed before the rebuild. Your info makes me wonder if the gain difference is the cause...
...In the feedback loop, how would increase gain output slightly higher, without adding more noise? Or is it possible without changing the RIAA curve?
PM AK member wlhd1610 (Bob Speece). I think he sometimes has a beautiful laser etched black faceplate for the 2325. I have one of his for the 2245 and it is superb.possibly looking for one of the black 2325 marantz faceplates whoever sells them let me know if available and cost thx
AK member "ragstoriches" brought in a very nice Marantz 2325 for some restoration and upgrade work.
The restoration/upgrade included the following:
1. Replacement of the power supply electrolytic capacitors with low ESR types (increasing capacity where appropriate and physically possible).
2. Replacement of the signal path electrolytic capacitors with film types (whenever possible) or bi-polar electrolytic types.
3. Upgrade original polyester film capacitors to polypropylene film types (as appropriate).
4. Replacement of the signal path ceramic capacitors with C0G types.
5. Replacement of the failure-prone 2SC458 and 2SA722 transistors.
6. Replacement of the output relay.
Power Supply & Relay Board (P800)
The P800 board contains the regulated power supplies as well as the protection circuit.
P800 board in original state
Components removed
Board cleaned of glue residue
Restored and upgraded board
The DS-131B dual diodes, H808 and H809, were upgraded to high current, soft recovery types:
NXP BYQ28E-200,127. The capacitor C803 is the main filter for the regulated supplies and the original 470µF/63V capacitor was replaced with a 1200µF/63V low ESR type. Similarly, capacitor C806 filters the 35V and 19V supply, and the original 220µF/63V capacitor was replaced with a 680µF/63V low ESR type. The large 150 ohm/5W dropping resistor, R801, that feeds C804, was replaced with a physically smaller 150 ohm/7W one to allow better air flow around the surrounding components. The C804 capacitor that filters the 14V supply was replaced with a 680µF/63V low ESR type. Capacitors C805, C807 and C809 are on the base of the regulator/pass transistors and were replaced with low ESR types: 470µF/35V, 330µF/50V and 22µF/50V, respectively.
Capacitors C811, C812 and C813 are used in the protection relay circuit and were also replaced with low ESR types: 22µF/63V, 47µ/25V and 220µF/35V, respectively. The protection relay (L801) was replaced with an OMRON LY2-0-DC24, which is a drop-in replacement for the original type.
Your replacement for R801 is it a wire wound?