Electrical Adjustments - Mitsubishi Electric SD420U Service Manual

ELECTRICAL ADJUSTMENTS

Necessary equipment and connecting
Connect the following equipment as shown in the right figure.
• This projector
• Personal computer (with Microsoft
operating system)
(For Microsoft ® Windows
• Monitor for personal computer
• RS-232C cable
• USB cable
• Signal generator (equivalent to VG-812)
• SVGA_WRGB_64scale signal (for C/W delay adjustment)
• XGA_WRGB_64scale signal (for C/W delay adjustment)
Test signal
• SVGA signal (Vertical frequency 60 Hz) (for SD420U / SD430U)
• XGA signal (Vertical frequency 60 Hz)
(for XD420U / XD430U / XD435U / XD435U-G)
• NTSC (480i) signal (Vertical frequency: 59.94 Hz)
The timing and patterns for the adjustment are as follows :
H Timing
HDW
HBP
HD signal
Program ROM : LC12 Ver. 1.8
(for SD420U / SD430U)
Program ROM : LC6 Ver. 1.9
(for XD420U / XD430U / XD435U / XD435U-G)
Program
No.
White / black signal
29
SMPTE (White) *
30
* Though the signal generator supplies
this signal as a green signal, the
projector receives it as Y/C
Therefore, this signal is projected as a
full white SMPTE signal.
® Windows ® 98/Me/XP
® 98, use SE or later.)
HDISP
HP
Pattern
/C signal.
B R
1. ADC offset
COMPUTER IN
terminal
Signal
generator
2. C/W delay
COMPUTER IN
terminal
Signal
generator
V Timing
VDW
VD signal
Timing of SVGA signal (Vertical frequency 60 Hz)
DOT-CLOCK [MHz]
HP [DOT]
HDISP [DOT]
HDW [DOT]
HBP [DOT]
Timing of XGA signal (Vertical frequency 60 Hz)
DOT-CLOCK [MHz]
HP [DOT]
HDISP [DOT]
HDW [DOT]
HBP [DOT]
Timing of NTSC (480i) signal (Vertical frequency:59.94 Hz)
DOT-CLOCK [MHz]
HP [DOT]
HDISP [DOT]
HDW [DOT]
HBP [DOT]
- 1 -
RS-232C cable
Projector
RS-232C terminal
USB cable
Projector
USB terminal
VDISP
VBP
VP
40.0 VP [H]
1056 VDISP [H]
800 VDW [H]
128 VBP [H]
88 Interlace
Signal polarity
65.0 VP [H]
1344 VDISP [H]
1024 VDW [H]
136 VBP [H]
160 Interlace
Signal polarity
13.5 VP [H]
858 VDISP [H]
720 VDW [H]
64 VBP [H]
58 Interlace
Signal polarity
Monitor for
personal
computer
Personal
computer
Monitor for
personal
computer
Personal
computer
628
600
4
23
---
HD : +, VD : +
806
768
6
29
---
HD : –, VD : –
525
480
3
14
Interlace
HD : nothing
VD : nothing
Sync on green : -