Pioneer deh-p980bt Service Manual page 138

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1.4 POWER SUPPLY AND LOADING BLOCK
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For the power supply for this system, the VD (7.5 ± 0.5 V) and the VDD (5.0 ± 0.25 V), which are supplied from the
motherboard, are used. The three power supplies, the VD mentioned above (for the drive system), the V3R3D obtained
from the VD via the 3.3 V regulator (for the control system: 3.3 V) and the VDD (for the microcomputer: 5 V), are used in
this system.
The microcomputer controls ON/OFF with "CONT", except for Load/Eject of the CD driver, and ON/OFF of 3.3 V with
"CD3VON". For ON/OFF of the Loading drive, no particular control terminals are available, but the input signal "LOEJ"
assumes an equivalent role. Also, the LCO output switches LOADING MODE and CARRIAGE MODE with "CLCONT".
CN901
19
PGND
20
VD
1
2
2
TE
L 13942296513
12
18
9
11
Fig.1.4.1 Power supply/loading system circuit block
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Fig.1.4.2 Loading/carriage mode shift
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LCOP
18
20
IC301
BA5835FP
LCOM
17
10 9
19 22
28 21
VD
2
IC203
NJM2886DL3-33
3
GND
VDCONT
VDD
CLCONT
x ao
y
Loading Mode
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6
8
LOADING
M
MOTOR
CLCONT
Q Q
3 6 7 1 3
4
5VDD
u163
Carriage Mode
.
CX-3164
6
7
2 9 9 4 2 8
41 40 47
1 5 0 5 8 2 9 9 4
IC701
PE5505A
49 4 30 31
S903 S905 S904
m
co
Loading Mode
7
8
9 9
A
B
C
2 8 9 9
D
32
E
F
17
8