SECTION 4
PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(For printed wiring boards)
•: Pattern from the side which enables seeing. (The other layers' patterns are not indicated.)
•Through hole is omitted.
•Circled numbers refer to waveforms.
•There are few cases that the part printed on diagram isn’t mounted in this model.
•Chip parts.
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| Diode |
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| C | 6 5 4 | 4 5 6 |
| 4 | 5 |
| 1 | 2 |
| 3 |
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B E 1 2 3 | 3 2 1 |
| 3 2 1 |
| 5 4 3 |
| 2 1 |
| 2 1 |
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(For schematic diagrams)
•All capacitors are in µF unless otherwise noted. pF : µµF. 50V or less are not indicated except for electrolytics and tantalums.
•Chip resistors are 1/10W unless otherwise noted. kΩ=1000Ω, MΩ=1000kΩ.
•Caution when replacing chip parts.
New parts must be attached after removal of chip.
Be careful not to heat the minus side of tantalum capacitor, Be- cause it is damaged by the heat.
•Some chip part will be indicated as follows.
Example | C541 | L452 |
| 22U | 10UH |
| TA A | 2520 |
Kinds of capacitor
Temperature characteristics
External dimensions (mm)
•Constants of resistors, capacitors, ICs and etc with XX indicate that they are not used.
In such cases, the unused circuits may be indicated.
•Parts with ★ differ according to the model/destination. Refer to the mount table for each function.
•All variable and adjustable resistors have characteristic curve B, unless otherwise noted.
•Signal name
| XEDIT → EDIT PB/XREC → PB/REC | ||
• |
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| : non flammable resistor |
• |
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| : fusible resistor |
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| : panel designation |
• |
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| : internal component. |
• |
| B + | : B+ Line. |
• |
| B – | : B– Line. |
•Circled numbers refer to waveforms.
•Readings are taken with a
•Voltage are dc between ground and measurement points.
•Readings are taken with a digital multimeter (DC10MΩ).
•Voltage variations may be noted due to normal production tolerances.
• | : adjustment for repair. |
•Circled numbers refer to waveforms.
When indicating parts by reference number, please include the board name.
Note :
The components identified by mark ! or dotted line with mark
!are critical for safety. Replace only with part number specified.
Note :
Les composants identifiés par une marque ! sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant le numéro spécifié.