Gen2n3

iTrader: (1)

Here is a reference to all who may need part number look ups for the Logicon Amp components in the S5 RX-7.

The breakdown will go as follows:
Component P/N, Current Manufacturer, Manufacturer P/N, DigiKey P/N

Here is what I found (with photos):

1. Transistors.
1. a. C1815Y, Fairchild, KSC1815YTA, KSC1815YTACT-ND
1. b. 1001, Fairchild, FJN3305R, FJN3314RBU-ND (Obsolete, must research further)
1. c. C3225, Central Semiconductor Corp, MPS650, MPS650CS-ND
1. d. C2655, Toshiba Corp, 2SC2655 (Obsolete, must research further)

2. Capacitors:
2. a. 47uF, 10V, 105*C electrolytic type, Panasonic, EEA-GA1A470, P14478-ND
2. b. 33uF, 16V, 105*C electrolytic type, Panasonic, EEA-GA1C330, P14485-ND
2. c. 47nF, 25V, ceramic type, marked "25V 473M" (Obsolete, must research further)

3. Integrated Circuit (IC / 14-pin DIP)
3. a. uPC451C, Texas Instruments, LM2902N, 296-6599-ND

I also included spec sheets for transistors C2655, C3225, and IC uPC451C (LM2902N). If someone already has a source for the obsolete parts then feel free to comment.

Cheers,
George



Transistor C1815



Capacitors 47uF, 10V and 25V 473M (47nF)



Transistor 1001 (1 more behind 47uF cap)



Transistors 1001, C3225, and C2655



Close-up of Transistors 1001, C2655



14-pin DIP / IC uPC451C



Label view of 47uF, 10V cap



Label view of 33uF, 16V cap

jjwalker

What kills these things besides the cold solder joints is sitting. I have never heard of an RX7 not sitting at some point. Electrolytic capacitors need to be cycled and used or they will leak out and die.