Circuit Description; System Control Biock; Outline "0; Block Diagram Of Electrical Block - Sony UP-D897 Service Manual
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Also See for UP-D897:
- Instructions for use manual (22 pages) ,
- Specifications (2 pages) ,
- Instructions for use manual (25 pages)
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Section 3
Circuit Description
3-1.
System Control Block |
3-1-1..
Outline
System control is performed using IC104
(TMS320DM310ZHK22) on the MA-132 board. The
system control block consists of the following blocks.
* CPU block (ARM925)
* SDRAM control block
* External memory control block (Flash memory, etc.)
* DSP block (Image processing)
* External interface block (USB1.0, memory cards, video
encoder, and CCD interface)
ENCODER
& NTSC/PAL |
INTERFACE
Block diagram of IC 104
3-1-2.
Block Diagram of Electrical Block
Refer to "Section 6 Block Diagram".
3-2.
Head/Mechanical Control Block
3-2-1.
Outline
The thermal head/mechanical control block is the circuit
block of IC202 (CXD9182AGG) on the MA-132 board.
There is an external I/O block except the thermal head/
mechanical control block.
UP-D897
3-2-2. Platen Motor Control
A platen driving stepping motor controls the forward
rotation/reverse rotation and rotation speed when IC202
controls driving transistors (Q603 to Q606).
1C202
Signalname
State
Pin 46
PM_A1
L
H
H
Pin 47
PM_A2
H
H
L
L
Pin 92
PM_B1
L
H
H
L
Pin93
PM _B2
H
L
L
H
Forward rotation
Reverse rotation
3-2-3.
Thermal Head UP/DOWN Control
A thermal head UP/DOWN DC motor is driven using a
driving circuit C201 on the SE-768 board). The DC
motor can be rotated in the forward and reverse directions.
It is controlled by IC202. Two types of optical position
sensors (photo-interrupters PH201 and PH203 on the SE-
768 board) detect the DC motor position and C202 reads
it.
Operation of Head UP/DOWN Motor
DC motor
[C202 (pin 1)
1C202 (pin 2)
Operation
or CN204
or CN204
(pin 8) DCM_0 = (pin 7) DCM_1
Forward
L
H
The thermal
rotation
head is raised.
Reverse
H
L
The thermal
rotation
head is lowered.
Brake
H
H
Stop
Stop
L
L
Stop
State of position sensor
Position
10202 (pin 53)
IC202 (pin 96)
State
or CN204 (pin 3)
or CN204 (pin 5)
HEAD
P SENSE
HEAD_P2_SENSE
PRINTING
L
H
Printing
HOME
H
L
Standby
(Usually)
DOOR
H
H
Door
OPEN
unlocked
3-1
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