Chapter 5. Circuit Description; Notes On Schematic Diagram; Types Of Transistor And Led - Sharp CD-SW250DVD Service Manual

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Audio CHAPTER 5. E Market CD-SW250DVD Service Manual CD-SW250DVD
CIRCUIT DESCRIPTION

[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 resistor without any symbol is ohm-type resis-
tor. 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 sym-
bol 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
JOG701 VOLUME
NSW1 PICKUP IN
SW1 CLAMP
SW2 TRAY SW1
SW3 TRAY SW2
SW4 DISC
SW601 SPAN SELECTOR
SW701 POWER ON/STAND-BY
SW702 CLOCK/TIMER
SW703 TUNING UP
SW704 TUNING DOWN
SW705 FAST REWIND/PRESET DOWN
SW706 EQUALIZER
SW707 FAST FORWARD/PRESET UP
SW708 REVERSE MODE
SW712 TUNER (BAND)

[2] Types of transistor and LED

FRONT
VIEW
E C B
(S)(G)(D)
(1)(2)(3)
KTA1273 Y KTC3200 GR
KTA1274 Y KTC3203 Y
KTC3199 GR
KTC3205 Y
KTC3194 Y
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
B
(3)
TOP
C
VIEW (2)
E
(1)
KRA107 S
KRC102 S
KRC104 S
KTC107 S
KTA1504 GR
KTC3875 GR
KTK5133 S
5 – 1
• The indicated voltage in each section is the one measured by Digi-
tal Multimeter between such a section and the chassis with no sig-
nal 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 " " (
taining 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 DESCRIPTION
SW713 CD
SW714 TAPE
SW715 GAME/VIDEO
SW716 X-BASS/DEMO
SW724 PLAY
SW725 STOP
SW726 REC./PAUSE
SW727 MEMORY/SET
SW728 OPEN/CLOSE
SW729 DIRECT PLAY
SW730 DISC2
SW731 DISC4
SW732 DISC5
SW733 DISC3
SW734 DISC1
SW735 REVERSE PLAY
FRONT
VIEW
A C A C
TS20P05G
TS10B05G
) are important for main-
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
FRONT
VIEW
SDPB40F2A
SLR342VCB1
SDPB50CD