Table of Contents
Advertisement
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:
•
b : Pattern from the side which enables seeing.
(The other layers' pattern are not indicated)
•
Circled numbers refer to waveforms.
•
Through hole is omitted.
•
There are a few cases that the part printed on diagram isn't
mounted in this model.
•
Chip parts.
Transistor
Diode
C
6
5 5
4
4
5
6
4
5
1
2
3
3
3
B
E
1
2
3
3
2
1
3
2
1
5
4
3
2
1
2
1
2
1
For schematic Diagram:
•
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
/
W unless otherwise noted.
10
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,
because it is damaged by the heat.
•
Some chip part will be indicated as follows.
Example
C 541
L 452
22U
10UH
TA
A
2520
Kinds of
Temperature
External
capacitor
characteristics
dimensions (mm)
•
Constants of resistors, capasitors, ICs and etc with XX indi-
cate that they are not used. In such cases, the unused cir-
cuits may be indicated.
•
Parts with
differ according to the model/destination. Re-
fer 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
•
2 : nonflammable resistor.
•
5 : fusible resistor.
C : panel designation.
•
A : B+ Line.*
•
B : B– Line.*
•
J
•
: IN/OUT direction of B line (+, –).*
C : adjustment for repair.*
•
•
Circled numbers refer to waveforms.*
Measuring conditions voltege and waveform:
•
Voltages and waveforms are measured between the mea-
surement points and graound when color bar signal
input.They are reference values and reference waveforms.*
(VOM of DC 10 M Ω input impedance is used)
•
Voltage values change depending upon input impedance
of VOM used.
* Indicated by the color red.
Note:
Note:
The components identi-
Les composants identifiés par
une marque 0 sont critiques
fied by mark 0 or dotted
line with mark 0 are criti-
pour la sécurité.
cal for safety.
Ne les remplacer que par une
Replace only with part
piéce por tant le numéro
number specified.
spécifié.
When indicating parts by reference
number, please include the board
name.
4-1
DSR-11
Advertisement
Table of Contents
