Sharp CD-ES900

CD-ES900/CD-ES99
5 – 1
CD-ES900/CD-ES99CD-ES900/CD-ES99Service ManualCD-ES900/CD-ES99MarketE
CHAPTER 5. 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.
• 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 “ “ ( ) are important for main-
taining the safety of the set. Be sure to replace these parts with
specified ones for maintaining the safety and performance of the
set.
[2] Types of transistor and LED
REF NO. DESCRIPTION POSITION
NSW1 PICKUP IN ON-OFF
SW1 CLAMP ON-OFF
SW2 TRAY SW1 ON-OFF
SW3 TRAY SW2 ON-OFF
SW4 DISC ON-OFF
SW701 POWER ON/STAND-BY ON-OFF
SW702 CLOCK/TIMER ON-OFF
SW703 TUNING UP ON-OFF
SW704 TUNING DOWN ON-OFF
SW705 FAST REWIND/PRESET DOWN ON-OFF
SW706 EQUALIZER ON-OFF
SW707 FAST FORWARD/PRESET UP ON-OFF
SW712 TUNER (BAND) ON-OFF
SW713 CD ON-OFF
SW714 TAPE ON-OFF
SW715 GAME/VIDEO ON-OFF
SW716 X-BASS/DEMO ON-OFF
SW725 PLAY/REPEAT ON-OFF
SW726 STOP ON-OFF
SW727 REC/PAUSE ON-OFF
SW728 MEMORY/SET ON-OFF
SW729 OPEN/CLOSE ON-OFF
SW730 DIRECT PLAY ON-OFF
SW731 DISC2 ON-OFF
SW732 DISC4 ON-OFF
SW733 DISC5 ON-OFF
SW734 DISC3 ON-OFF
SW735 DISC1 ON-OFF
REF NO. DESCRIPTION POSITION
KRA107 S
KRC102 S
KRC104 S
KTA1504 Y
KTC3875 GR
DS1SS133
B
(3)
E
(1)
C
(2)
TOP
VIEW
KDS184
TOP VIEW
TOP VIEWTOP VIEW
KTA1266 GR
KTA1271 Y
KTA1273 Y
KTA1274 Y
VIEW
FRONT
ECB
(S)(G)(D)
(1)(2)(3)
1N4004S
D10XB60F
AC AC
VIEW
FRONT
FRONT
VIEW
304VT2H3
SDPB50CD
KTC3194 Y
KTC3199 GR
KTC3200 GR
KTC3203 Y