Magnavox 19MDTR20 Service Manual page 209

SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS
Standard Notes
WARNING
Critical components having special safety
characteristics are identified with a # by the Ref. No.
in the parts list and enclosed within a broken line*
(where several critical components are grouped in one
area) along with the safety symbol # on the
schematics or exploded views.
Use of substitute replacement parts which do not have
the same specified safety characteristics may create
shock, fire or other hazards.
Under no circumstances should the original design be
modified or altered without written permission from
Philips Consumer Electronics Company. Philips
assumes no liability, express or implied, arising out of
any unauthorized modification of design. Servicer
assumes all liability.
* Broken Line :
Capacitor Temperature Markings
Capacity
Mark
change rate
±
(B) 10%
±
(F) 30 - 80%
±
(SR) 15%
±
(Y) 22.5%
Capacitors and transistors are represented by the
following symbols.
< PCB Symbols >
(Top View) (Bottom View)
+
(Bottom View)
Transistor or Digital Transistor
E C B
(Top View)
NPN Transistor
E C B
(Top View)
NPN Digital Transistor
E C B
Standard Temperature
temperature range
20°C -25~+85°C
20°C –25~+85°C
20°C –25~+85°C
20°C –25~+85°C
Electrolytic Capacitor
(Top View)
E C B
(Top View)
E C B
Notes:
1. Do not use the part number shown on these
drawings for ordering. The correct part number is
shown in the parts list, and may be slightly
different or amended since these drawings were
prepared.
2. To maintain original function and reliability of
repaired units, use only original replacement parts
which are listed with their part numbers in the
parts list section of the service manual.
3. How to read converged lines.
1-D3
Distinction Area
Line Number
(1 to 3 digits)
Examples:
(1). "1-D3" means that line number "1" goes to the
line number "1" of the area "D3".
(2). "1-B1" means that line number "1" goes to the
line number"1" of the area "B1".
4. All resistance values are indicated in ohms
3
(K = 10 , M = 10
5. Resistor wattages are 1/6W unless otherwise
specified.
6. All capacitance values are indicated in µF
-6 µF).
(P = 10
7. All voltages are DC voltages unless otherwise
specified.
8. Voltage indications for PLAY and REC modes on
the schematics are as shown below.
< DVD Section >
The same voltage for
both PLAY & STOP modes Indicates that the voltage
<
TV/VCR Section >
The same voltage for
PLAY, REC & DVD
modes
< Schematic Diagram Symbols >
PNP Transistor
PNP Digital
Transistor
1-11-1
3
AREA D3
AREA B1
2
1-D3
1
A B C
6
).
Unit: Volts
PLAY mode
1 2 3
STOP mode
5.0
5.0
(2.5)
is not consistent here.
PLAY mode
1 2 3
5.0
REC mode
5.0
(2.5)
DVD mode
< >
Indicates that the voltage
is not consistent here.
Digital Transistor
1-B1
D
T1102SC