I'm a novice when it comes to electronics, I have a 38 year old Pioneer SX-780 that I plan on restoring. I have been doing some extensive research on the web, and what I found I wish to share as it might be useful information to others. I obtained a copy of both the SX-780 "User Manual" and "Service Manual" on the web. The Service Manual has the blueprint schematic and parts list. I found that the original part numbers (p/n's) are now obsolete, but the parts list still has valuable information which will become more apparent as we move forward. I found a booklet entitled "Tuning Fork No. 2" which is all about Pioneer Capacitors of the late 1970s. Here is some info that I extracted from that booklet that I found useful in combination with the obsolete P/N list that I have in my SX-780 Service Manual: PIONEER CAPACITOR PART NUMBER The Pioneer Part number of Capacitor is broken down into seven codes: P/N CEANL101M50NP CE.....A.....NL.....101.....M.....50.....NP ...............................  = Type of capacitor .  = Form .  = Characteristics  = Nominal Capacitance .  = Tolerance .  Maximum working voltage  = miscellaneous (NP is used exclusively to indicate a non-polar electrolytic capacitor). THE BREAKDOWN  Type of Capacitor There were fifteen types of capacitors used in Pioneer Stereos of the late 1970s. The Pioneer capacitor part number will begin with one of these 2 or 3 digit codes: CE - Aluminum Electrolytic Capacitor CSY - Solid Aluminum Electrolytic Capacitor CSS - Solid Aluminum Electrolytic Capacitors for Coupling CSZ - Solid Tantalum Electrolytic Capacitor CK - Ceramic Capacitors with High Dielectric Constant CC - Ceramic Capacitors for Thermal Compensation CM - Mica Capacitors CQM - Mylar Capacitors CQS - Polystyrene Film Capacitors CQC - Polycarbonate Film Capacitors CP - Oil-filled Paper Capacitors CG - Ceramic Capacitors CQE - Metalized Mylar Film Capacitors CQP - Polypropylene Film Capacitors CH - Metalized Paper Capacitors  FORM A = Radial Leads B = Axial Leads D = Disc Type Radial Leads (Ceramic, etc.) H = Radial Leads with insulator mount on capactitor  CHARACTERISTICS Represented by two alphabetic letters, if they appear in your capacitor p/n it is an indication that the capacitor has certain characteristics by design. The Characteristic code only applies to Ceramic (CK or CC) and Electrolytic (CE) type capacitors. Aluminum Electrolytic Capacitors (CE). NL is the Characteristic Code of a Low Leakage capacitor. CEANL = Aluminum Electrolytic, Radial Lead, low leakage capacitor CEBNL = Aluminum Electrolytic, Axial Lead, low leakage capacitor. Ceramic Capacitors with High Dielectric Constant (CK). The first alpha letter of the Characteristic Code will represent the Temp. Range, the second alpha letter is simply a code letter. YA - Capacitance variation range within -5 to +5% - Tolerance Code J, K YB - Capacitance variation range within -10 to +10% - Tolerance Code K YD - Capacitance variation range within -30 to +20% - Tolerance Code M YF - Capacitance variation range within -80 to +30% - Tolerance Code Z BC - Capacitance variation range within -30 to +30% - Tolerance Code M, Z Ceramic Capacitors with Thermal Compensation (CC). The first letter of the code gives the temperature coefficient of the nominal capacitance, while the second letter indicates the capacitance tolerance. 2pf or less [CK, HK, LK, PK, RK, SK, TK, UK, SL] 3pf [CJ, HK, LJ, PJ, RJ, SJ, TJ, UJ, SL] 4 to 9pf [CH, HH, LH, PH, RH, SH, TH, UJ, SL] Above 10 to approx. 330pf [CG, HG, LG, PG, RG, VK, WK, LX, CH, HH, LH, PH, RH, SH, TH, UJ, SL] FIRST Code (Thermal Coefficient PPM/Celsius) CC Capacitor. C = +/-0 Black [-] H = -30 Brown [-] L = -80 Red [-] P = -150 Orange [-] R = -220 [-] S = -330 Green T = -470 Blue [-] U = -750 Violet [-] V = -1,000 V [-] W = -1,500 W [-] X = -2,200 X SL = -1,000~+350 no color [-] SECOND Code (Thermal Coefficient Tolerance PPM/Celsius) CC Capacitor. G = +/-30 [-] H = +/- 60 [-] J = +/- 120 [-] K = +/- 250 [-] L = +/- 500  NOMINAL CAPACITANCE The nominal capacitance is represented by a 3 digit figure followed by the unit uF for Aluminum Electrolytic capacitors, and pF for other types. The first two digits give the significant value, while the third digit indicates the number of zeros that follow it. If a fraction is involved, the decimal point is represented by R. Example: 2.2uf becomes 2R2 in the part number such as in : CEA2R2P50 = 2.2uF 50V Electrolytic Cap Example: CEA331P16 = 33 plus 1 zero = 330uF 16V Electrolytic Cap.  TOLERANCE Tolerance is indicated by a single letter and gives the range variation permitted beyond the nominal capacitance. The tolerance codes are as follows: C = +/- 0.25pF *** note: Applies to 0.5 to 3pF CC type capacitors D = +/- 0.5pF **** note: Applies to 4 to 6pF CC type capacitors E = +/- 1pF ****** note: Applies to 7 to 10pF CC type capacitors F = +/- 1% ******* note: Possible with CQP type G = +/- 2% J = +/- 5% K = +/- 10% M = +/- 20% P = +50, -10% **** note: Applies to CEA type capacitors X = +40, -20% **** note: Applies to CSZ and CSS types Z = +80, -20% **** note: Applies to 330 to 47,000pF CK type capacitors  Maximum Working Voltage This represents the maximum DC voltage that can be supplied to the capacitor. Working voltages are standardized at 6, 10, 16, 25, 35, 50, 68, 80, and 100V. For example your parts list might call out for a CEA100P16 CE = Aluminum Electrolytic Capacitor A= Radial leaded 100 = 10 + no zeros = 10uF P= +50, -10% Tolerance 16 is the maximum voltage that can be supplied to the capacitor.  MISC This code is used only for indicating non-polar aluminum electrolytic capacitors and is identified by the letters NP. Down below is my Tuner Board, as you can see it's quite dirty. The indicators are the part locations of capacitors and semi conductors listed in the SX-80 service manual. This photo only serves as a guide when trying to identify a location on this board.