Toshiba SD-2800 Service Manual - Page 3

2. CIRCUIT SYMBOLS AND SUPPLEMENTARY EXPLANATION 2-1. Precautions for Part Replacement • In the schematic diagram, parts marked (ex. F801) are critical part to meet the safety regulations, so always use the parts bearing specified part codes (SN) when replacing them. • Using the parts other than those specified shall violate the regulations, and may cause troubles such as operation failures, fire etc. 2-2. Solid Resistor Indication Unit Tolerance Rated Wattage Type None W K ........... kW M MW None B C D F G K M 5 0.1 0.25 0.5 1 2 10 20% (1) Chip Parts None ......... 1/16W (2) Other Parts None ......... 1/6W Other than above, described in the Circuit Diagram. None S R W W FR ........... Carbon film Solid Oxide metal film Metal film Cement Fusible Eg. 1 100k Rated Wattage Type Tolerance FIg. 3-2-1 2-3. Capacitance Indication Symbol Electrolytic, Special electrolytic NP Non polarity electrolytic ........... Ceramic, plastic M Film ........... Trimmer Unit None F m ........... mF p ........... pF Rated voltage None 50V For other than 50V and electrolytic capacitors, described in the Circuit Diagram. Tolerance (1) Ceramic, plastic, and film capacitors of which capacitance are more than 10 pF. None 5% or more B 0.1% C 0.25% D 0.5% F 1% G 2% (2) Ceramic, plastic, and film capacitors of which capacitance are 10 pF or less. None more than ±5% pF B 0.1 pF C 0.25 pF (3) Electrolytic, Trimmer Tolerance is not described. Temperature characteristic (Ceramic capacitor) None SL For others, temperature characteristics are described. (For capacitors of 0.01 mF and no indications are described as F.) Static electricity capacity (Ceramic capacitor) Sometimes described with abbreviated letters as shown in Eg. 3. Eg. 2 100m Temperature Rated Tolerance response voltage Fig. 3-2-2 Eg. 3 104 m 10x104pF (0.1 F) Temperature characteristic (or Temperature characteristic+ Static electricity capacity tolerance) Fig. 3-2-3