Sharp XL 1700 - Executive Microsystem - Notes on Schematic Diagram; Types of Transistor and Led

XL-1700/1700C
– 18 –
SW702 PICKUP IN ON—OFF
SW709 POWER ON—OFF
SW710 CD LID OPEN/CLOSE ON—OFF
SW711 REW/PRESET DOWN ON—OFF
SW712 FF/PRESET UP ON—OFF
SW713 CD STOP/TUNING DOWN ON—OFF
SW718 CD PLAY/PAUSE/TUNING UP ON—OFF
• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas-
sis with no signal given.
1. In the tuner section,
( ) : AM mode
: FM stereo mode
2. In the CD section, the CD is stopped.
• Parts marked with “ ” ( ) are 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.
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 resistor 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 micro-micro-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 subject to change for improvement without prior
notice.
REF. NO DESCRIPTION POSITION POSITIONREF. NO DESCRIPTION
SW719 VOLUME DOWN ON—OFF
SW720 VOLUME UP ON—OFF
SW725 BASS/TREBLE ON—OFF
SW726 MEMORY/SET ON—OFF
SW727 CLEAR ON—OFF
SW728 FUNCTION ON—OFF
SW802 CD LID ON—OFF
ECB
(S)(G)(D)
FRONT
VIEW
FRONT
VIEW
BCE
FRONT
VIEW
2SB562 C
2SC380 O
2SK2541
KRA102 M
KRA107 M
KRC102 M
KRC104 M
KRC107 M
KTA1266 GR
KTC3199 GR
KTC3200 GR
2SD2012 Y
LP3052D
LP99B
SVC348S
1 2 3
(1) (2) (3)
Figure 18 TYPES OF TRANSISTOR AND LED