Sharp VE-CG30U Service Manual page 26

VE-CG30U
VE-CG40U
7-3. POWER SECTION BLOCK DIAGRAM
J
I
AC ADAPTOR
OUT: 6.0V – 7.0V (planed)
Electric current rating
(not yet determined)
OFF when the DC
jack is inserted
H
+
Size AA battery, 4 cells
Voltage: 4.0 – 7.2V
(1.0 - 1.8V per cell)
—
to SYSCON
G
(DC JACK V_DET)
(BATT_V_DET)
4CH Power control IC
PWM
EPR AMP
COMP
F
PWM
EPR AMP
COMP
PWM
EPR AMP
COMP
PWM
EPR AMP
COMP
E
D
Table 1. Operation of each section and the D/D converter input voltage by
C
plugging/unplugging the DC jack
Operation mode BATT operation Plugging
Plugging/
unplugging the jack
DC voltage
FET1 ON OFF
B FET2 ON ON
D/D IN Batt Batt-Vf2
Vf2: parasitic diode Vf2 of FET2 which is one of two FETs
A
1 2 3
DC JACK
D1
5.5V booster circuit
5.5V
Vf2
FET2
Vf1
FET1
OFF when the voltage
is applied to the DC
input
3.5V dropper circuit
Composite
part adopted
N-ch FET
DRIVER
P-ch FET
1.8V dropper circuit
DRIVER
P-ch FET
DRIVER
Composite
P-ch FET
part adopted
DRIVER
Multi-transformer circuit
Adaptor
Unplugging BATT operation
operation
Constant current circuit for white LED
OFF OFF ON
OFF ON ON
DC output Batt-Vf2 Batt
SYS3.3V REG circuit
4 5 6 7 8
SP_5V *1
5.0V *1
REG circuit
5.0V
REG circuit
3.3V
REG circuit
3.3V
REG circuit
DPCON_1.8V
12V
REG circuit
REG16V
15V
REG circuit
CAM-7V
REG-8V
REG circuit
White LED unit
10.3V (3 lights), 15mA
SYS 3.3V
Sub-microcomputer
(MM3033)
RTC
9 10 11 12
28~29
*1: Only CG40 system for the AUDIO circuit and SP5V
Line name
Connected to
DPCON_1.8V
APCON_5V
APCON_5V
DPCON_3.3V
CAM 5V APCON_3.3V
Connected to
APCON_5V
CAM_ON APCON_3.3V
Connected to
DPCON_3.3V
CAM3.3V Connected to
DPCON_3.3V
SYS_3.3V
APCON_3.3V
BATT_NONREG
LENS_3.5V
Connected to
DPCON_3.3V
CAM_15V
CAM_-7V
LCD 3.3V CAM_5V
CAM_3.3V
Connected to
CAM_3.3V
LENS_3.5V
Connected to
APCON_5V
APCON_3.3V
SP_5V
Connected to
LCD_12V
LCD_ON
LCD_3.3V
Connected to
NONREG
LCD 12V
APCON_5V
CAM_15V
CAM_ON
CAM 7V
13 14 15 16
VE-CG30U
VE-CG40U
Required spec
ASIC
1.8 ± 0.1V
4.9 ± 0.1V
3.3 ± 0.15V
3.3 ± 0.15V
IO
5.0 ± 0.1V
3.3 ± 0.1V
MEM
3.3 ± 0.3V
SYSCON
3.3 ± 0.1V
3.3 ± 0.1V
3.6 7.5V
CCD
15.0 ± 0.4V
-7.0 ± 0.3V
5.0 ± 0.1V
3.3 ± 0.1V
LENS
3.3 ± 0.1V
3.5 ± 0..1V
AUDIO *1
5.0 ± 0.3V
3.3 ± 0.3V
5.5 ± 0.3V
LCD
12.0 ± 0.4V
3.3 ± 0.1V
STROBE
3.6 7.5V
5.0 ± 0.1V
17 18 19 20