NEC Multisync Plus JC-1501VMA User manual

NEe
COLOR MONITOR MULTISVNC r
SERVICE MANUAL
MODEL JC-1501VMA
PARTS NO. 599910258
Better Service
Better Reputation
Better Profit
SPECIFICATIONS
A. Electrical Description
Picture Tube
Input Signal
Display Colors
14 Visual inches diagonal
90 degree deflection, 0.31 mm Trio dot pitch
Dot type black matrix
Non·long persistence phosphor, Dark bulb, Direct
etch
Video : TTL Level Positive
:
ANALOG 0.7 or 1.0Vp·pn50 Positive
Sync. : Separate
sync. TTL level
Horizontal
sync. Positive/Negative
Vertical sync. Positive/Negative
: Composite
sync. TTL level
Positive/Negative
: Composite
sync. on Green Video
sync. O.3Vp-p Negative (Video 0.7Vp-p Positive)
or sync. 0.43Vp·p Negative (Video 1.0Vp·p
Positive)
TTL Input :
8116164 colors
Analog Input : Unlimited colors
Synchronization Horizontal :
21.BKH to 45kHz (Automatically)
Vertical : 56Hz to 80Hz (Automatically), Non·
interlace
Resolution Horizontal : 960 dots
Vertical :
720 lines
Video Band Width 55MHz
on BNC, 30MHz on D·Sub
Maximum Display Horizontal :
260 mm (Active display area is changed
Area
Vertical: 195mm by signal timing)
Misconvergence
less than 0.6mm
Power Supply AC 120V /60Hz
Power Consumption 120W
Dimensions 360
(W) x 372 (H) x 410 (D) mm
Weight 1Bkg
Environmental Operating Temperature O°C to +400C
Consideration Humidity 30% to 80%
Storage Temperature -
200C to +600C
Humidity 10% to 90%
NOTE: The above specifications are subject to change
without notice for further improvement.
NEe Corporation
TOKYO, JAPAN

B. Mechanical Description (See below diagrams)
1. Cabinet Molded plastic cabinet with attachable tilt swivel base.
2. Dimensions 36Q(W) x: 372(~) x 410(D) mm
3. Weight 18
kg
Dimensions
.
II I I
I.
230mm J
360mm
Tilt Swivel Range
4. Controls
5. Input Signal Terminal:
I
I
E
E
N
'"
'"
i
,
Ell
E L I
E
~;
I.
235mm
410mm
5' 10'
BRIGHTNESS CONTROL
CONTRAST CONTROL
HORIZONTAL POSITION CONTROL
HORIZONTAL SIZE CONTROL
VERTICAL POSITION CONTROL
VERTICAL SIZE CONTROL
POWER SWITCH
.1
9 PIN D-SUB CONNECTOR (FEMALE)
(SEE PAGE 2 FOR PIN ASSIGNMENTS)
BNC CONNECTOR (FEMALE)
I
f
INPUT SWITCH
TEXT SWITCH
TEXT COLOR SWITCH
TTL/ANALOG SWITCH
BNC INPUT VOLTAGE SWITCH
COLOR SWITCH
MANUAL SWITCH
(SEE PAGE 3 FOR CONNECTION ASSIGNMENTS)
-1-

PIN ASSIGNMENTS AND SIGNAL LEVELS
D-SUB Type 9-P
@@@®CD
®®0®
MANUAL SWITCH OFF
~
TTL
ANALOG
PIN EGA COMPATIBLE PGC COMPATIBLE VGAlMCGA COMPATIBLE
No.
16 COLORS 64 COLORS
1 GROUND GROUND
eRED eRED
2 GROUND SECONDARY RED eGREEN eGREEN
3 RED PRIMARY RED
eBLUE
eBLUE
4 GREEN PRIMARY GREEN COMPOSITE SYNC. H. SYNC.
5 BLUE PRIMARY BLUE MODE CONTROL V. SYNC.
6 INTENSITY SECONDARY GREEN RED GROUND RED GROUND
7 NO-CONNECTION SECONDARY BLUE GREEN GROUND GREEN GROUND
8 H. SYNC. H. SYNC. BLUE GROUND BLUE GROUND
9 v. SYNC.
V. SYNC. GROUND GROUND
MANUAL SWITCH ON
~
TTL ANALOG
PIN 8 COLORS I
16 COLORS 64 COLORS SEPARATE COMPOSITE I SYNC. ON
No. SYNC. SYNC. GREEN
1 GROUND
eRED
2 SECONDARY eGREEN
I @HNSYNC.
-RED ON GREEN
3 RED PRIMARY
eBLUE
RED
4 GREEN PRIMARY H. SYNC.
HN SYNC. I
GREEN -
5 BLUE PRIMARY
V. SYNC.
BLUE -
6 I INTENSITY SECONDARY
-GREEN
7 SECONDARY
-BLUE GROUND
8 H. SYNC.
9 V. SYNC.
-2-

BNC
• i •
R
G(/SYNC.)
CONNECTOR SYNC. ON GREEN
R * RED
G •
HN SYNC. ON GREEN
B * BLUE
CS -
" " means GROUND or NON-CONNECTION
"H" means HORIZONTAL
"V" means VERTICAL
"H/V" means COMPOSITE SYNC.
SIGNAL LEVEL
All signal leveles, except for those listed below, are TTL.
"." means O.7Vp-p (VIDEO)
"@" means O.7Vp-p (VIDEO), O.3Vp-p (SYNC.)
"*" means O.7Vp-p or 1.0Vp-p (VIDEO)
i
8
COMPOSITE SYNC.
*RED
*GREEN
* BLUE
HN SYNC.
" ." means O.7Vp-p (VIDEO), O.3Vp-p (SYNCJ or 1.0Vp-p (VIDEO),
O.43Vp-p (SYNC.)
-3-

TIMING CHARTS
SEPARATE SYNC.
I
VIDEO
HORIZONTAL
rcJ.
D
U
-I ..
I..B
A
I
VIDEO
VERTICAL I" a ..I
..
R
U
1 ..
I
..
P 0
u----
___ -----=---- __ ~j Sync. Polarity: Positive/Negative
COMPOSITE SYNC.
____ ~I I r--
HORIZONTAL l"c.I.. D .I .. E"
I
ld ____ ..
B
~A ~_~
---,L.. __________ .....J1 -viDEO -- lL.. ____ _
VERTICAL a I R I s
t-- - ... • .. -I
-----~
o J
Sync. Polarity: Positive/Negative
COMPOSITE SYNC. & VIDEO (SYNC. ON GREEN)
HORIZONTAL
D
.1., :
A
VERTICAL
Sync. Polarity: Negative
-4-

PRESET TIMING
EGA
VGAlMCGA
720
COMPATIBLE COMPATIBLE LINES
fH
22kHz 31.5kHz 45kHz
A,.,s 45.5 31.77 22.287
Bits
4.9 3.77 1.07
C
itS
1.6 1.89 3.2
o its 39 25.17
17.127
E,.,s 0 0.94 0.89
fv 60Hz 70Hz 60Hz 60Hz
OmS
16.68 14.27 14.27 16.68 16.85
P
mS 0.6 0.064 0.064 0.064 0.089
Q mS
0.08 1.88 1.08 1.02
0.691
R mS 16 11.126 12.716 15.246 16.048
S
mS 0 1.2
0.41 0.35 0.022
SEPARATE SEPARATE SEPARATE SEPARATE
COMPOSITE
SYNC. SYNC. SYNC. SYNC. SYNC.
H. SYNC.
H. SYNC. H. SYNC.
or
REMARKS Positive Negative Negative
COMPOSITE
V. SYNC.
V. SYNC. V. SYNC.
SYNC & VIDEO
Negative Positive Negative . (Sync. on Green)
IBM PC, PC/XT, PC/AT, Personal System/2, MCGA, VGA, EGA and PGC are
trademark of International Business Machines Corporation.
MultiSync is a registered trademark of NEC Home Electronics (U.S.A.) Inc.
-5-

GENERAL
MultiSync PLUS The Intelligent Monitor, from NEC, is a high resolution color mo-
nitor that automatically adjusts to graphics board scanning frequencies from
21.8 kHz to 45 kHz. MultiSync PLUS gives IBM PC, PC/XT, PC/AT, Personal Sys-
tem/2 and
PC compatibles users crisp text and vivid color graphics displays when
used with any of the IBM graphics adapters (the MCGA, VGA, EGA or PGC).
MultiSync PLUS can also
be used with other IBM compatible graphics adapters
to provide IBM users with the widest range of color monitor compatibility and
capability available in the market place.
FEATURES
• MultiSync PLUS automatically scans all frequencies between 21.8 kHz and
45kHz.
• MultiSync PLUS is compatible with the IBM
PC, PC/XT, PC/AT and look-alikes.
• MultiSync PLUS is compatible with the IBM Professional Graphic Controller,
the IBM Enhanced Graphics Adapter, the IBM Video Graphics Array, the IBM
Multi Color Graphics Array and other IBM compatible graphics adapters.
• MultiSync PLUS's wide compatibility makes it possible to upgrade boards or
software without purchasing a new monitor.
• MultiSync PLUS has a maximum horizontal resolution of960 dots and a maxi-
mum vertical resolution of 720 lines for superior clarity of display.
• MultiSync PLUS offers both TTL and ANALOG signal inputs, and in the ANA-
LOG mode can display an unlimited palette of colors depending on the graph-
ics board and software being used.
• MultiSync PLUS features a TEXT SWITCH (TTL mode only) with a choice of
three colors (green, amber and paper white) displaying word processing, spread
sheets, databases or other software in crisp alphanumeric text
on a dark-bulb
black background.
• MultiSync PLUS has a
15 inch diagonal display and a large 14 inch viewing area.
-6-

ADJUSTING THE MULTISYNC PLUS CONTROLS
Before connecting the MultiSync PLUS with the IBM personal computers or com-
patibles and the IBM graphics adapters, take time to familiarize yourself with the
switches and controls that give the MultiSync PLUS all its capabilities. Chapters
1 and 2 outline the control and switches of the MultiSync PLUS. Page
11 shows
you how to connect the MultiSync PLUS with your IBM personal computer and graph-
ics adapter.
1. ADJUSTING THE REAR CONTROLS
TTL ALOG
,
SIGNAL INPUT
CS
TILl ANALOG SWITCH
, BNC INPUT
VOLTAGE SWITCH
1.0
i
R
..... I ......
8 16 64
,
GI/SYNCI
COLOR SWITCH
MANUAL SWITCH
,
B
~--~------======~====~~,
BNC CONNECTOR INPUT (ANALOG)
o SUB 9 PIN TYPE (TIUANALOG)
-7-

oMANUAL SWITCH
This switch selects either the IBM mode when OFF or the manual mode when
ON. When this switch is
OFF, MultiSync PLUS automatically works in the IBM
mode and adjusts itself to the scanning frequency, resolution and color require-
ments of the IBM compatible graphics adapter being used.
When this switch is ON, the user must manually select the number of colors
(8/16/64) needed by the graphics adapter being used with the COLOR SWITCH
(see
No.8 below). Refer to instructions accompanying the graphics adapter be-
ing used for information on how many colors the adapter can display.
8 COLOR SWITCH
The three color configurations (8/16/64 colors) necessary when using non-IBM
compatible graphics adapters can be set using the colorswitch as shown below.
Refer to instructions accompanying the graphics adapter being used for infor-
mation on how many colors the adapter can display.
COLOR MODE COLOR
SWITCH
8 colors 8
16 colors 16
64 colors 64
NOTE
This switch should be set correctly in relation to the input signal of the graphics
adapter being used. Refer to instructions accompanying the graphics adapter
for information
on the input signal and refer to No .• below.
8 TTL/ANALOG SWITCH
Used to select an input video signal-either TTL or ANALOG-of the graphics
adapter.
It is important to determine whether the input signal of the graphics adap-
ter being used is ANALOG or TTL prior to connecting the adapter with your the
MultiSync PLUS. Refer to instructions accompanying the graphics adapter for
information
on the input signal.
oBNC INPUT VOLTAGE SWITCH
Used to select an input video voltage-either 1.0Vp-p or O.7Vp-p-of the graph-
ics adapter. Refer to instructions accompanying the graphics adapter for infor-
mation on the input video voltage.
-8-

2. ADJUSTING THE FRONT CONTROLS
• HORIZONTAL POSITION
CONTROL
CD VERTICAL POSITION CONTROL
~ HORIZONTAL SIZE CONTROL
8) VERTICAL SIZE CONTROL
., POWER SWITCH
CONTRAST.CONTROL
• BRIGHTNESS CONTROL
POWER SWITCH
POWER INDICATOR
INPUT SWITCH
TEXT SWITCH
TEXT COLOR SWITCH
Used to turn power ON or OFF. When the power is ON the power indicator is lit.
o BRIGHT CONTROL
Used to adjust the picture brightness of the screen.
• CONTRAST CONTROL
Adjusts the display to the contrast preferred by the user.
-9-

f!) V. SIZE CONTROL
Adjust this knob for the prop.er vertical size of the display. Turn the knob clock-
wise for a larger display; turn it counterclockwise for a smaller display.
o V. POSITION CONTROL
Adjust this knob for the proper vertical position ofthe display. Turn the knob clock-
wise for a higher display position; turn it counterclockwise for a lower display
pOSition.
4D H. SIZE CONTROL
Adjust this knob for the proper horizontal size of the display.
4D H. POSITION CONTROL
Adjust this knob for the proper horizontal position of the display. Turn the knob
clockwise to reposition displayto the right; turn it counterclockwise to reposition
to the left.
48 TEXT SWITCH
This switch controls the text mode of the MultiSync PLUS.
When it is ON, the text will appear
in the color displayed by the TEXT COLOR
SWITCH (See
No. 4t below), regardless of the colors of the software program
being used.
When it is
OFF, the color of the software program being used will again be dis-
played.
NOTE
The text switch works only in the TTL mode.
• TEXT COLOR SWITCH
Use this switch to select the text color-green, amber, or paperwhite-when the
TEXT SWITCH
is ON.
48 INPUT SWITCH
Use this switch to select input connector-either D-Sub or BNC.
-10-

CONNECTING THE MULTISVNC PLUS
1. WITH YOUR COMPUTER OR GRAPHICS ADAPTER
To connect the MultiSync PLUS with your computer or graphics adapter, refer
to the diagram below.
Check input terminal pin assignment
BNC 9-pin D-Sub
Select BNC
Check input signal level
1.0Vp-p
Select D-sub
Check
videQ signal level
ANALOG Video TTL Video
O.7Vp-p
Corinect the power cord to the MultiSync PLUS and signal
cable between the MultiSync PLUS and your computer or
graphics adapter
Turn on ttie MultiSync PLUS POWER SWITCH
Turn on the power to computer
-11-
See APPENDIX A
See APPENDIX A
See rear controls
8 COLOR SWITCH
See front controls
.. INPUT SWITCH

2. WITH EGA, PGC OR COMPATIBLE ADAPTER
Using IBM PC, PC/XT, PC/AT or compatible computer equipped with the IBM
Enhanced Graphics Adapter (EGA) or the IBM Professional Graphics Controller
(PGC) or compatible adapter.
1 Make sure the power to the MultiSync PLUS and the computer is off.
2 Make sure the INPUT switch on the front of MultiSync PLUS is at "O-sub".
3 Make sure the nUANALOG switch and the MANUAL switch on the rear are
at appropriate position.
EGA or TTL
ANALOG
BNC INPUT VOLTAGE COLOR
MANUAL
EGA compatible
IIIIIIII
1.0.0.7
-
OFF. ON
[TTL INPUT]
...
,.......JI~
•
8 16 64
PGC or TTL ANALOG
BNC INPUT VOLTAGE COLOR
MANUAL
PGC compatible
IlJIIII]
1.0.0.7
-
OFF. ON
[ANALOG INPUT]
..
,.......JI~
•
8 16 64
4 Connect the power cord and the signal cable to the MultiSync PLUS
I Use the signal cable with "9-pin O-sub to 9-pin O-sub".
MultiSync PWS
Power Cord
Computer
EGA,
PGC or
compatible
adapter
/
)Pin O-sub 9-pin O-sub
Signal Cable
-12-

3. WITH PERSONAL SYSTEM/2 OR COMPATIBLE SYSTEM
Using IBM Personal System/2 with Multi ColorGraphics Array (MCGA) or Video
Graphics Array
(VGA) or compatible system.
1 Make sure the power to the MultiSync PLUS and the computer is off.
2 Make sure the INPUT switch on the front of the MultiSync PLUS is at "O-Sub".
3 Make sure the TTUANALOG switch and MANUAL switch on the rear are at
appropriate position.
MCGA or VGA
or compatible
[ANALOG INPUT]
TTL ANALOG
IIIlIIll
..
BNC INPUT VOLTAGE COLOR MANUAL
1.000.7 _ OFFDON
.......... I '--0 ..........
8 16 64 .......
4 Connect the power cord and the singnal cable to the MultiSync PLUS.
Use the SIGNAL CABLE with "9-pin O-sub to 15-pin Mini O-sub"
MultiSync PWS
Power cord
Computer
PS/2 or
Compatible
System
~
(~~~~~~15'-Pin Mini D~
Signal cable
-13-

4.WITH A HIGH RESOLUTION GRAPHICS ADAPTER
Using a high resolution graphics adapter or a high resolution graphics system
(ex. 960 x 720 resolution)
1 Make sure the power to the MultiSync PLUS and the computer is off.
2 Make sure the INPUT switch on the front of the MultiSync PLUS is at "BNC".
3 Make sure the BNC INPUT VOLTAGE switch on the rear is at appropriate
position for the maximum video output voltage from your adapter.
(1.0:1V peak
to peak, 0.7:0.7V peak to peak)
4 Connect the power cord and the signal cable to the MultiSync PLUS.
Use the optional signal cable or the signal cable supplied your adapter.
MultiSync PLUS
Power Cord
computer
High Resolution
Graphics Adapter
Signal Cable
5 The red BNC cable should be connected to the BNC connector "R".
The green BNC cable should be connected
to the BNC connetor "G (/SYNC)".
The blue BNC cable should be connected to the BNC connector "B".
The black BNC cable should be connected
to the BNC connector "CS".
For the optional signal cable, please contact your authorized NEC
Home Electronics dealer.
-14-

DISASSEMBLY
BACK COVER REMOVAL
Remove two back cover mounting screws (A) and (B) then take off back cover.
(A)
CASE SHIELDING (TOP) REMOVAL
(B)
Remove two case, shielding (TOP) mounting screws (C) and (0) then take off case shielding (TOP).
(C)
(0)
-15-

PART LOCATIONS
BOARD LAYOUT
B5
BOARDS
B1
SW. REG. PWB ASSY PWE-168
B2
VIDEO PWB ASSY PWE-179
B3 DEF
PWB ASSY PWE-173
B4 CRT
PWB ASSY PWE-l77
B5
INTERFACE PWB ASSY PWE-176
-16-

L M N o p Q
ADJUSTMENT CONTROLS
A
V.HOLD(VR401)
p
G. BIAS (VR902)
B V.
SUB HEIGHT (1) (VR440) Q B. BIAS (VR903)
C V. SUB
HEIGHT (2) (VR441) R
G. GAIN (VR702)
0 V. SI;2:E LIMITER (VR443) S SUB. CONT (VR704)
E SIDE·PIN (VR470) T
B. GAIN (VR703)
F V. BIAS (VR402) U
R. GAIN (VR70l)
G V. LIN
(S) (VR404) V SCREEN
H V. LIN
(C) (VR403) w FOCUS
I
CI VOLTAGE L1MITE-R (VR653) X SUB H. CENTER
2(27-35KHz)(VR504)
J
+6V ADJ (VR509) y
SUB H. CENTER 3(20-27KHz)(VR505)
K
SUB BIAS (VR907) Z
SUB H. CENTER 1 (42KHz-)(VR503)
L R. SUB BRIGHT (VR904) AA
H. HOLD 2 (27KHz) (VR502)
M
G. SUB BRIGHT (VR905)
BB
H. HOLD 1 (42KHz) (VR50l)
N
B. SUB BRIGHT (VR906)
CC
H. SIZE CONTROL (VR510)
0
R. BIAS (VR901)
-17-

AD,""USTMENT CONTROLS LAYOUT
rn
VR651
a5V ADJ
PWE-168 SW. REG PWB ASSV
VR652~
REF V
VR653 [J
V Limiter
[Q] II em. " [lIJ I I [Q] I
'--s-a-o--'1 -=='-=--_---J sa04 sa03 Sa02
TIL/ANALOG O.7V/1.0V 8/16/64 PRESET/MANUAL
PWE-176 INTERFACE PWB ASSV
-18-

VR6 VR5 VR4 VR3
IH.POSI) IV.POSI) IH.SIZE) IV. SIZE)
@]@]@]@]
PWE-173C
S4
TEXT COLOR
I aD I I
S3
TEXT
[QJ
CONTROL PW8 ASSY
O
VR401
V.HOLD
O
VR440
V.SUB HEIGHT(1)
O
VR441
V.SUB HEIGHT(2)
OVR443
o
TP404
DIC443
O
VR470
SIDE-PIN
O
VR402
V.BIAS TP402 TP401
O
VR404 m::Q]
V.LlN(S)
o VR403
V.LlN(C)
DCT1
CT2
CT3
VR510
H.SIZE
© L509
WIDTH COIL
@
TP2002C TP2003A
S2
BUC/D-SUB
I I rnl I
o 0
VR509 VR508 VR2002 TP2002A
+6V ADJ H.V.ADJ H.V.PROTECTOR2
0
®oO OOVR2001
TP50~ ~2~ H.V.PROTECTOR1
PWE-173A DEF PWB ASSY
-19-
[Q]
VR1
BRIGHT
[Q]
VR2
CaNT.
PWE-1738
CONTROL
PW8 ASSY
VR502 D
V
R501
H.HOLD20 H.HOLOl
TP501 OVR503
00 ~~E~REl
TP502 0 OVR504
VR505 SUB
SUB H.CENTRE2
H.CENTRE3
o
L506
H.LlNEARITY