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DR- R504X
3.
SCHEMATIC AND PCB CONNECTION DIAGRAMS
NOTE FOR SCHEMATIC DIAGRAMS
(Type 4A)
1. When ordering service parts, be sure to refer to
"PARTS
LIST
of EXPLODED VIEWS" or "PCB
PARTS LIST".
2. Since these are basic circuits, some parts of them or the
values
of some components may be changed for Improve-
ment.
3. RESISTORS:
Unit: k:k!:l
,
M:M!:l, or
!:l
unless otherwise noted.
Rated
power:
1/4W,
1/6W, 1/8W,
1/
10W unless otherwise
noted.
Tolerance:(F):±
1%,
(G):±2%,
(K):±
10%, (M):±20% or
±5%
unless
otherwise
noted.
4. CAPACITORS:
Unit : p:pF or
µ
F unless otherwise noted.
Ratings : capacitor (
µ
F)
/voltage
(V) unless otherwise
noted.
Rated voltage
:
50V except for electrolytic
capacitors.
5. COILS:
Unit
: m:mH
or
µ
H
unless otherwise
noted.
6.
VOLTAGE AND CURRENT:
'[:::J or
- V
:
DC
voltage
(V) In PLAY mode unless otherwise
noted.
¢::imA
or
-mA:
DC current in PLAY mode unless otherwise
noted.
Value in (
) is DC current in STOP mode.
7.
OTHERS:
•
©
or~
:
Adjusting point.
•
~
:
Measurement point.
• The
&.
mark found
on
some
component
parts
Indicates
the
Im-
portance of
the
safety
factor
of the parts. Therefore,
when
replacing,
be sure to use parts of identical designation.
8. SCH -
0
ON THE SCHEMATIC DIAGRAM:
• SCH-D indicates the drawing number of the
schematic
diagram.
(SCH stands for schematic diagram.)
9.
SWITCHES (Underline Indicates switch position):
MAIN UNIT
10
S1001 :DIP SW
S1001-1 :BLKSZ
S1001- 2:PARTY
S1001-
3:TEARM
S1001- 4:MTCS
S1001-
5.:TEST- 1
S1001- 6:TEST- 2
NOTE FOR PCB DIAGRAMS:
1.
Part numbers in PCB diagrams match those in the schematic
diagrams.
2. A comparison between main parts of PCB and schematic dia-
grams is shown
below.
Symbol in PCB
Symtiol in Schematic
Part Name
Diagrams
Diagrams
8
c
E 8
c
E
(o o o)
1©J
1©J
Transistor
8 C E
8
c
E
8
c
E
~
l©J
w
Transistor
8 C E
with
resistor
D
G
s
D G
s
~
l@J l@J
Field effect
DGS
transistor
(o o
0%0
oo}:l
mm
Resistor array
loo ol
v
3-terminal
regulator
I
·'
(
(
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