Philips MAGNAVOX 20MC4304 Service Manual page 25

SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS
Standard Notes
WARNING
Critical components having special safety characteris-
tics 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
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 temperature
(B) ±
10%
(F) +30 - 80%
(SR) ±
15%
(Z) ±
22.5%
Capacitors and transistors are represented by the fol-
lowing symbols.
< PCB Symbols >
(Top View) (Bottom View)
+
Electrolytic Capacitor
(Bottom View)
Transistor or Digital Transistor
E C B
(Top View)
NPN Transistor
E C B
(Top View)
NPN Digital Transistor
E C B
Company. Philips
Standard Temperature
range
20°C -25~+85°C
20°C –25~+85°C
20°C –25~+85°C
20°C –25~+85°C
(Top View)
PNP Transistor
E C B
(Top View)
PNP Digital
Transistor
E C B
Notes:
1. Do not use the part number shown on these draw-
ings 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. Prefix symbol "CN" means "connector" (can dis-
connect and reconnect).
Prefix symbol "CL" means "wire-solder holes of the
PCB" (wire is soldered directly).
4. 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 area
"D3."
(2). "1-B1" means that line number "1" goes to area
"B1."
5. All resistance values are indicated in ohms
3 6
(K=10 , M=10 ).
6. Resistor wattages are 1/4W or 1/6W unless other-
wise specified.
7. All capacitance values are indicated in µF
-6 µF).
(P=10
8. All voltages are DC voltages unless otherwise
specified.
9. Voltage indications for PLAY and REC modes on
the schematics are as shown below
< DVD Section >
1
5.0
The same voltage for
both PLAY & STOP modes Indicates that the voltage
< TV/VCR Section >
1
5.0
The same voltage for
PLAY, REC & DVD
modes
< Schematic Diagram Symbols >
Digital Transistor
1-5-1
3
1-B1
AREA D3
AREA B1
2
1-D3
1
A B C D
Unit: Volts
PLAY mode
2 3
STOP mode
5.0
(2.5)
is not consistent here.
PLAY mode
2 3
5.0 REC mode
(2.5) DVD mode
[ ]
Indicates that the voltage
is not consistent here.
SC_5