Notes On Schematic Diagram; Types Of Transistor And Led - Sharp CD-C449W Service Manual

• 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 MECHA UP
SW3 DISC NUMBER
SW4 PICKUP IN
SW991 VOLTAGE SELECTOR
SWD1 VOLUME JOG
SWD2 JOG
SWD3 X-BASS
SWD7 SOFT
SWD8 VOCAL
SWD9 HAVY-2
SWD10 HAVY-1
SWD11 FLAT
SWD12 TUNING UP/CUE
SWD13 STOP
SWD14 NORMAL EDIT
SWD15 HIGH EDIT
SWD16 REC/PAUSE
SWD17 F-PLAY
SWD18 SRS/DEMO
SWD21 BAL RIGHT
SWD22 BAL LEFT
SWD30 TUNING DOWN/REWIND
SWD31 CD PAUSE
FRONT
VIEW
E C
(S) (G) (D)
(1) (2) (3)
KTA1266 GR
KRA107 M
KTA1270Y
KRA102 M
KTA1271 Y
KRC102 M
KTA1273 Y
KRC104 M
KTA1268 GR
KRC107 M
KTC3199 GR
2SC535 C
KTC3203 Y
2SC1845 F

NOTES ON SCHEMATIC DIAGRAM

POSITION
ON—OFF
ON—OFF
ON—OFF
ON—OFF
230-240V
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
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
B
2SC2878 A
2SC2878 B
2SC2236 Y
2SD468 C
2SK246 GR
KTC3200 GR
Figure 17 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
SWD32 REVERSE MODE
SWD33 R-PLAY
SWD34 CLOCK
SWD35 MEMORY
SWD36 TIMER
SWD37 SLEEP
SWD38 CLEAR
SWD39 VIDEO/AUX 1
SWD40 VIDEO/AUX 2
SWD41 TAPE 1/2
SWD42 TUNER/BAND
SWD43 CD
SWD48 POWER
SWD49 KARAOKE (CD-K449W Only)
SWD50 DISC 1
SWD51 DISC 2
SWD52 DISC 3
SWD53 DISC SKIP
SWD54 OPEN/CLOS
SWF2 SPAN SELECTOR
SWM3 REC FWD
SWM4 REC RVS
SWM5 F.A.S
SWM6 CAM
FRONT
VIEW
B C E
(D) (G) (S)
(3) (2) (1)
2SD2012
2SB1375
– 17 –
CD-C449W/K449W
" ( ) are important for
DESCRIPTION
FRONT
VIEW
SLR325MG
SLR325VR
KV1236Z23
KL052UL
SLR505MC
LMKD515B
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
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
ON—OFF
50/9
ON—OFF
ON—OFF
ON—OFF
ON—OFF
FRONT VIEW