Printed Wiring Boards And Schematic Diagrams - Sony DCM-M1 Service Manual

SECTION 4

PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

THIS NOTE IS COMMON FOR WIRING BOARDS AND SCHEMATIC DIAGRAMS
(In addition to this, the necessary note is printed in each block)
(For schematic diagrams)
(For printed wiring boards)
• All capacitors are in µF unless otherwise noted. pF : µ
• b: Pattern from the side which enables seeing.
µF. 50 V or less are not indicated except for electrolytics
(The other layers' patterns are not indicated.)
• Through hole is omitted. and tantalums.
• Chip resistors are 1/10 W unless otherwise noted.
• Circled numbers refer to waveforms.
kΩ=1000 Ω, MΩ=1000 kΩ.
• There are few cases that the part printed on diagram
isn't mounted in this model. • Caution when replacing chip parts.
• Chip parts. New parts must be attached after removal of chip.
Be careful not to heat the minus side of tantalum
Transistor Diode
C 6 5 5 4 4 5 6 4 5 1 2 3 3 3 capacitor, Because it is damaged by the heat.
• Some chip part will be indicated as follows.
Example C541
B E 1 2 3 3 2 1 3 2 1 5 4 3 2 1 2 1 2 1
22U
• Lead Layouts TA A
surface
Kinds of capacitor
Temperature characteristics
External dimensions (mm)
• Constants of resistors, capacitors, ICs and etc with XX
indicate that they are not used.
Lead layout of conventional IC CSP (chip size package)
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
• 2: non flammable resistor
• 1: fusible resistor
• C: panel designation
• U : B+ Line
• V : B– Line
• C: adjustment for repair.
• Circled numbers refer to waveforms.
• The voltage and waveform of CSP (chip size package) can-
not be measured, because its lead layout is different form
that of conventional IC.
Note: Note:
The components identi- Les composants identifiés par
fied by mark 0 or dotted une marque 0 sont critiques
line with mark 0 are criti- pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part pièce portant le numéro
number specified. spécifié.
When indicating parts by reference number, please
include the board name.
4-1
(Measuring conditions voltage and waveform)
MD1 PB :
• Voltages are dc between measurement point.
• Readings are taken when playing CD reference disc.
MD2 REC/PB :
• Voltages and waveforms are measured between the
measurement points and ground when camera shoots
color bar chart of pattern box. They are reference values
and reference waveforms.
(VOM of DC 10 MΩ input impedance is used)
• Voltage values change depending upon input impedance
of VOM used.)
L452
10UH
1. Connection
2520
Pattern box
L
Front side of the lens
L = About 90 cm
2. Adjust the distance so that the output waveform of Fig.
a and the Fig. b can be obtain.
H
A B A=B B A
Fig. a (Video output terminal output waveform)
Color bar chart
picture frame
Monitor TV
picture frame
Fig.b (Picture on monitor TV)
4-2
DCM-M1 DCM-M1