Chapter 5. Circuit Schematics And Parts Layout; Notes On Schematic Diagram; Types Of Transistor And Led - Sharp DK-AP2 Service Manual

CHAPTER 5. CIRCUIT SCHEMATICS AND PARTS LAYOUT

[1] Notes On Schematic Diagram

Resistor:
•
To differentiate the units of resistors, such symbol as
K and M are used: the symbol K means 1000 ohm
and the symbol M means 1000 kohm and the resis-
tor without any symbol is ohm-type resistor.
Besides, the one with "Fusible" is a fuse type.
• Capacitor:
To indicate the unit of capacitor, a symbol P is used:
this symbol P means pico-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolytic capacitor, the expression "capacitance/
withstand voltage" is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
• Schematic diagram and Wiring Side of P.W.Board
for this model are
improvement without prior notice.
REF. NO DESCRIPTION
SW301 POWER ON / STAND-BY
SW302 VOLUME UP
SW303 VOLUME DOWN
SW304 PLAY/PAUSE
SW305 FORWARD
SW306 REVERSE

[2] Types Of Transistor And LED

B
(3)
E
(1)
KIA78D05
subject to change
POSITION
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
TOP C
(2)
VIEW
KRC107S
KTC3875 GR
KRA102S
KTC2875B
FRONT
VIEW
Cathode
3 2 1
A304VT2H
A343BD2S2
A304AD2E
• The indicated voltage in each section is the one
measured by Digital Multimeter between such a
section and the chassis with no signal given.
1. In the tuner section,
indicates FM stereo
Parts marked with "
•
important for maintaining the safety of the set. Be
sure to replace these parts with specified ones for
maintaining the safety and performance of the set.
for
TOP VIEW
MA111
IN5820
SK24A
MA21038
RB160M30
Anode
5 – 1
DK-AP2/DK-AP2(BK)
" (
D1SS119
KiA278R05
FRONT
VIEW
1 2 3 4 5
1 - INPUT (V )
in
2 - OUTPUT (V )
O
3 - GND
4 - V SENSE
O
5 - ON/OFF CTRL (V
C
) are
)