Notes On Schematic Diagram; Types Of Transistor And Led - Sharp CD-BA180 Service Manual

CD-BA180
• 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
SW1 OPEN/CLOSE
SW2 CLAMP
SW3 DISC NUMBER
SW4 PICKUP IN
SW601 POWER
SW602 CLOCK
SW603 TIMER/SLEEP
SW609 DISC SKIP
SW610 OPEN/CLOSE
SW611 DIMMER
SW612 X-BASS/DEMO
SW613 EQUALIZER
SW614 VOLUME UP
FRONT
VIEW
E C B
(S) (G) (D)
(1) (2) (3)
KTA1266 GR KTA1273 Y
KRC102 M KTC3203 Y
KRC104 M KTC3199 GR
KTA1271 Y KRC107 M
KTA1274 Y KTC3194 Y
2SC1845 F

NOTES ON SCHEMATIC DIAGRAM

POSITION
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF

TYPES OF TRANSISTOR AND LED

• 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,
( ) indicates AM
< > indicates FM stereo
2. In the main section, a tape is being played back.
3. In the deck section, a tape is being played back.
( ) indicates the record state.
4. In the power section, a tape is being played back.
5. In the CD section, the CD is stopped.
• Parts marked with "
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
REF. NO
SW615 VOLUME DOWN
SW616 CD
SW617 TAPE
SW618 TUNING /TIME DOWN
SW619 MEMORY/SET
SW620 PRESET DOWN
SW621 PRESET UP
SW622 PLAY/REPEAT
SW623 STOP
SW625 REC/PAUSE
SW626 TUNING/TIME UP
SW627 VIDEO/AUX
SW628 TUNER (BAND)
FRONT
VIEW
B C E
KTC2026
– 28 –
" ( ) are important for
DESCRIPTION
FRONT
VIEW
4204SRT7
POSITION
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF