Notes When Using Service Manual
The following shows the contents to be noted when using service manual:
1. Value units used in parts list
Certain symbols are indicated below for value units of resistors, capacitors and coils in parts list. When you read them note the following regular indications:
Parts | Indication in list | Regular indication | |
Resistor | KOHM ........................................... k | ||
Capacitor | UF ................................................. µF | ||
PF ................................................. pF | |||
| |||
Coil | UH ................................................. µH | ||
MH ............................................... mH | |||
| |||
2. Values in schematic diagrams
The values, dielectric strength (power capacitance) and tolerances of the resistors (excluding variable resistors) and capacitors are indicated in the schematic diagrams using abbreviations.
[Resistors]
Item | Indication | |
| No indication | |
Value | K ................................................... k | |
| M .................................................. M | |
| No indication ............................. ±5% | |
Tolerance | (All tolerances other than ±5% are | |
| indicated in schematic diagrams) | |
| No indication ............................ 1/8W | |
Power | (1/16W for leadless resistors without | |
indication) | ||
capacitance | ||
All capacitances other than the above | ||
| ||
| are indicated in schematic diagrams. | |
[Capacitors] |
| |
|
| |
Item | Indication | |
Value | No indication ................................. µF | |
P ................................................... pF | ||
| ||
Dielectric | No indication .............................. 50V | |
(All dielectric strengths other than 50V | ||
strength | ||
are indicated in schematic diagrams) | ||
| ||
[Coils] |
| |
|
| |
Item | Indication | |
|
| |
Value | µ .................................................... µH | |
m .................................................. mH | ||
|
3.Identifications of sides A/B in circuit board diagrams
1)Board having a pattern on one side and parts on both sides.
Side A: Shows discrete parts, viewed from the pattern side.
Side B: Shows leadless parts, viewed from the pattern side.
2)Board having patterns on both sides and parts on both sides.
Side A: Shows parts and patterns which can be seen when the case is opened.
Side B: Shows parts and the pattern on the back of side A.
4.Table for indexing locations of parts
This table shows locations of each part on circuit board diagrams. The locations are indicated using the guide scales on the external lines of diagrams.
1) One diagram indicated for each board
Symbol |
|
| Parts |
|
| ||||||||
No. |
| Location |
|
| |||||||||
IC |
|
|
|
|
|
|
|
|
|
| Type of part | ||
|
|
|
|
|
|
|
|
|
| ||||
IC1201 |
| 2 A |
|
| |||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Zone "A" on board diagram | ||
Circuit No. |
|
|
|
|
|
|
| ||||||
|
|
|
|
| Zone "2" on board diagram | ||||||||
|
|
|
|
|
|
|
|
| |||||
2) Two diagrams indicated for each board
Symbol | Parts |
| ||
No. | Location | |||
IC |
|
|
| Type of part |
|
|
| ||
IC1201 |
| A - 2 | A |
| ||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Zone "A" on board | ||
|
|
|
|
|
|
|
|
|
|
|
| |||
Circuit No. |
|
|
|
|
|
|
|
|
|
| diagram | |||
| A: Shows side A |
|
|
| Zone "2" on board | |||||||||
|
|
|
| diagram | ||||||||||
| B: Shows side B |
|
|
| ||||||||||
|
|
|
|
|
|
| ||||||||
