Casio QW-2489, Service Manual & Parts List

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Top view of P.C.B. ass'y Bottom view of P.C.B. ass'y
3-3. CHECKING TERMINALS AND COMPONENT
ELD
KI7 KC2 KI6
KI6
KI6
KC3
KC4
KI4
KI5
KI2
KI3
KC2
BD2
BD2
BD1
BD1 GND
VDD2
GND
CLF1 CLF2
XTB
KI9
GND
XT
A4
KI1
SCUT
VDD2
VCC
VDD2
GND
VREF
GND
VREF VDD2
VDD1 GND
VCC
GND
VC3
VC4
VDD3
WP
VCC
AC
VCC
WP
VCC
BD1
L
VDD2
CLF1
CLF2
KC1
L+
ELD
L-
BD2
GND
GND
SDO
VDSP
VC1
VC3
L
GND
KI4
KI2
KI1
GND
XT
SCK
VCH
GND
VC1
VC2
GND
VHF
GND
VDSP GND
KI5
L+
L-
VCH
KI3
GND
VDD2
GND
GND
SCK SDO WP
GND GND GND GND
C9 Capacitor/Chip
C1 Capacitor/Chip C7 Capacitor/Chip
C8 Capacitor/
Chip
6. Cushion/506
Memory/
External
(7211 9631)
Resistor/Chip
6. Cushion/506
(7211 9631)
Capacitor/
Tantalum
Capacitor/Tantalum Coil
Diode
4. Oscillator/Crystal
(1004 1131)
(1001 0950)
CT 3. Capacitor/Trimmer
Xtal
Coil LL2
Capacitor/Chip
C10
LL1
Di2
Inverter
INV
Capacitor/Chip C12
C5
C6
Capacitor/Chip C11
7. Cushion/6
(7211 0064)
C2 Capacitor/Chip
C4 Capacitor/Chip
C3 Capacitor/Chip
Transistor
PCB WITH LSI
R2
Tr1