SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS
Standard Notes
WARNING
Many electrical and mechanical parts in this chassis
have special characteristics. These characteristics
often pass unnoticed and the protection afforded by
them cannot necessarily be obtained by using replace-
ment components rated for higher voltage, wattage, etc.
Replacement parts that have these special safety char-
acteristics are identified in this manual and its supple-
ments; electrical components having such features are
identified by the mark "
!
" in the schematic diagram
and the parts list. Before replacing any of these compo-
nents, read the parts list in this manual carefully. The
use of substitute replacement parts that do not have the
same safety characteristics as specified in the parts list
may create shock, fire, or other hazards.
Capacitor Temperature Markings
Mark
Capacity
change rate
Standard
temperature
Temperature
range
(B) ±10% 20°C –25~+85°C
(F) +30 -80% 20°C –25~+85°C
(SR) ±15% 20°C –25~+85°C
(Y) ±22.5% 20°C –25~+85°C
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 re-
paired 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 discon-
nect 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
(K=10
3
, M=10
6
).
6. Resistor wattages are 1/4W or 1/6W unless other-
wise specified.
7. All capacitance values are indicated in µF
(P=10
−6
µF).
8. All voltages are DC voltages unless otherwise speci-
fied.
9. Voltage indications for PLAY and REC modes on the
schematics are as shown below.
(Top View) (Bottom View)
(Bottom View)
Electrolytic Capacitor
+
Transistor or Digital Transistor
NPN Transistor
PNP Transistor
NPN Digital Transistor
PNP Digital
Transistor
(Top View)
(Top View)
E C B
E C B
Digital Transistor
< PCB Symbols >
< Schematic Diagram Symbols >
E C B
(Top View)
(Top View)
E C B
E C B
Capacitors and transistors are represented by the
following symbols.
2
3
1
5.0
(2.5)
PLAY mode
REC mode
5.0
The same voltage for
both PLAY & REC modes.
Indicates that the voltage
is not consistent here.
(Unit: Volt)
3
2
1
ABCD
1-B1
1-D3
AREA D3
AREA B1
U21_PAL_PC 1-12-1 SC_08
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