Sharp XG-NV1E (serv.man18) Service Manual ▷ View online
XG-NV1U
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(c) Transfer format
Shown below is the transfer format for the PS-2 mouse.
1st
2nd
T3
T1
CLK
DATA
T2
T4
3rd
Start
bit
Bit0
Bit1
11th
Stop bit
min./max.
T1 : 5/25 usec
T2 : 5/(T4-5) usec
T3 : 30/50 usec
T4 : 30/50 usec
T2 : 5/(T4-5) usec
T3 : 30/50 usec
T4 : 30/50 usec
(d) Interface start sequence
Whether the PS-2 mouse is connected or not is detected just when the computer gets started. This is not
detected, therefore, if the mouse is hooked up and the mouse driver is activated after the computer has got
started. The PS-2 mouse has sampling rate, resolution and other factors to be set.
For these settings, there are defaults for the mouse and those for the mouse driver.
The sampling rate is usually initialized at 100 Hz.
detected, therefore, if the mouse is hooked up and the mouse driver is activated after the computer has got
started. The PS-2 mouse has sampling rate, resolution and other factors to be set.
For these settings, there are defaults for the mouse and those for the mouse driver.
The sampling rate is usually initialized at 100 Hz.
5-3-3. Mac ADB mouse interface
(a) Basic specifications
Compatible PC
: Macintosh
Port used
: ADB port
Data format
: AFB protocol compatible
Transfer format
: ADB command bite + 2 data bites
Data transfer rate : About 10 kbps
Mouse power
Mouse power
: +5V power supplied from computer
(b) Data format
Shown below are the data formats of the command packet and data packet for the Mac ADB (Apple Desktop
Bus) mouse.
Bus) mouse.
Command packet:
Attention
Sync
Command byte
Stop bit
Sync
Command byte
Stop bit
Data packet:
Start bit
Data byte*
STop bit
Data byte*
STop bit
* : Usually, the X- and Y-axis values and the button’s data are sent in 2-bite data packet from the mouse.
L
Y6
Y5
Y4
Y3
Y2
Y1
R
X6
X5
X4
X3
X2
X1
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(c) Transfer format
Shown below is the transfer format for the Mac ADB mouse.
Start
bit
Stop
bit
2 Data byte
800us
65
us
100us
200us
Command byte
Attention
+ Sync
Stop
bit
Attention
: 800 us ± 5%
Sync
: 65 us ± 5%
1-bit cell time
: 100 us ± 30%
Low-level time at “0” : 65 us (100us x 65%)
High-level time at “1” : 35 us (100us x 65%)
High-level time at “1” : 35 us (100us x 65%)
(d) Interface start sequence
When the system gets started, the ADB device address and ID number of each device being connected with the
ADB bus are acknowledged. Now the interface is ready for use with the system.
ADB bus are acknowledged. Now the interface is ready for use with the system.
5-3-4. 98 bus mouse interface
(a) Basic specifications
Compatible PC
: NEC PC-9801 series, Epson 98 compatible
Port used
: Bus mouse port
Transfer format
: Rotary encoder output
Mouse power
: +5V power supplied from computer
(b) Data format
The 98 bus mouse interface is an incremental 2-phase rotary encoder interface that is equivalent to the NEC
PC-9801 series bus mouse port.
PC-9801 series bus mouse port.
(c) Transfer format
Shown below is the rotary encoder output format.
Twabh
Twab1
Tc
Ts
Ts
Ts
Ts
Tws1
Twsh
Ts
Ts
Ts
Ts
XA, YA
XB, YB
Positive direction :
XA, YA
XB, YB
Negative direction :
Tc : 2.0 msec min
Twabh, Twab1 : 1.0 mesc min
Ts : 0.5 msec min
Twabh, Twab1 : 1.0 mesc min
Ts : 0.5 msec min
Tws1, Twsh : 5 msec min
RIGHT,
LEFT
LEFT
Switch :
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6. POWER/BALLAST
6-1. Difference From Conventional Circuits
The ballast drive circuit is separated and floating-grounded. The chopper output
FET is switched at the GND. In this design, the ballast is directly driven.
FET is switched at the GND. In this design, the ballast is directly driven.
Rectifier
circuit
circuit
Igniter
Main
power
power
Oscillator
circuit
circuit
Ballast
power
power
No-light detection (No light at H)
P-CON(lamp power)
DC-DC converter
16.5V
13.0V
6.0V
4.5V
-7V
P-CON1
Figure 6-1. Block diagram of the power ballast unit
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7. VIDEO UNIT
On the video unit, the analog video signal input is converted to digital YUV data signal output. The brightness, contrast,
color, tint and other video adjustments are made too. The signals required for these processing and adjustments are all
generated in the SAA7110 (Phillips-made) package.
color, tint and other video adjustments are made too. The signals required for these processing and adjustments are all
generated in the SAA7110 (Phillips-made) package.
Input/output signal name
Signal contents
Connector
S-VIDEO
S video input (Y/C)
S terminal
VIDEO
Composite video input
RCA pin
AUDIO L CH
Left-channel audio input
RCA pin
AUDIO R CH
Right-channel audio input
RCA pin
+6V
+6V power voltage input (about 230 mA)
VS21, 23
UV
φ
~7
UV digital data output (8 bits)
VS1~8
Y
φ
~7
Y digital data output (8 bits)
VS9~16
LLC
Line lock clock output
VS19
(NTSC: 12.575757 MHz, PAL/SECAM: 14.75 MHz)
H-SYNC
Negative polarity
VS20
V-SYNC
Positive polarity
VS22
SCL
I
2
C bus serial clock input
VS24
SDA
I
2
C bus serial data input/output
VS25
VIDEO/RGB
Video/RGB switching input
VS26
(YUV line at high impedance in RGB (Hi) mode)
PCON 1
Power control input
VS27
(5V power regulator turned on at H)
S/VIDEO
S video/composite video switching output
VS28
(Low level with S cable connected)
AUDIO L
Left-channel audio output
VS29
AUDIO R
Right-channel audio output
VS30
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