NEC JC1402HME User manual

NEe
MULTISYNC COLOR MONITOR
SERVICE MANUAL
MODELS JC-1402HME/EE/ED/N/R
PART NO. 599910266
Better Service
Better Reputation
Better Profit
A. Electrical Description
SPECIFICATIONS
Picture Tube
Input Signal
Display Colors
Synchronization
Resolution
Video Band Width
Active Display Area
13 Visual inches diagonal
90 degree deflection. 0.31 mm Trio dot pitch
Dot type black matrix.
Non-long persistence phosphor, Dark bulb,
Direct each
Video. TTL Level Positive
ANALOG 0 7 Vp-p/750 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. 0.3 Vp-p Negative
(Video 0.7 Vp-p Positive)
TTL Input: 8/16/64 colors
Analog Input Unlimited colors
Horizontal 15.5 kHz to 35 kHz (Automatically)
Vertical 50 Hz to 80 Hz (Automatically),
Non-interlace
Horizontal
Vertical:
30MHz
Horizontal
Vertical:
800 dots
560 lines
250mm
185mm
(
Active display area is )
changed by signal timing.
Misconvergence
Power Supply
Power Consumption
Environmental
Considerations
Less than 0.6mm
AC220 ~. 240 V 50/60 Hz
85W
Operating Temperature
Humidity
Storage Temperature
Humidity
O°C to +40°C
30% to 80%
'-20°C to +60°C
10% to 90%
NOTE: The above specification are sublect to change without notice
for further improvement.
.-
..::
NEC Corporation
TOKYO. JAPAN

AC
220 -240V
"'"
.,
---------------
BLOCK DIAGRAM
RL80'
RL8Q2
RL8Q3
O-SUB 9P'N ~iJr;:::=============::r::::::::1
r TTL!
CN, ANALOG
~
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R
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____________ ~--------------~IR OUTPUT \
1 ~MP
~.- ANALOG
SENSE
IC80'
D/~
REO V
CONVERTOR
VIDEO
PRE-~MP
G CN3-2 L I l~
,---------0--------, HT: ?~~ ~:~~
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~-_-c}-_-"I CON TR AST f
Sw803 SWS02 SwSO, I 1 CJNT jROL .-------J
COLOR SELECTOR\ r COLOR/8/'" l I MANUAL I
64/'618 J SELECTOR ... __ S'_"_'_TC_H __ ...l.
"","' ~ L..- ___ ......JI L;:j .. O_I_~ __ C_~_~_~_~_R_T_O_R..J J IU'Hl~:~:: --He ~~::UT
PWE-206 ~3 A8L
.. 1_~_~_U_8_T __ () __ Q_<> _________________________________6 I X4 TR?14, TR?14
I
8L..lNKING r- PWE-207A
, TR?13 VIDEO PWB
~----------------o---------------...l
-- -0----------------------------------
IC850 SY~~ST~NOC\~~~TY t--------+----r'ls::.:?:< T~hll
_ J 8UFF ER 1\f---+---,,1-----~ ':""0-1
" ----'4 ~ SYNC f-----+-----. !lSs~.b- I
~ I SEPARATOR ~
L{
TTL I ANALO~ ITRS51,,- TRS5. TR860, IC85' ~5 I R
SEPARATOR CLAMP PULSE :>-J r-
PW E_ 2078 IC852 (SYNe.ON GRE EN I ~---_olL.._G_E_N_A_R_A_T_O_R_..J
-
IC45',IC452
--1 V FIV
I -ICONVERTOR
INTERFACE PW8
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~~~~=_~O~'~S_T_'N_C_T_'_O_N ___ } ___ S_Y_N_C ___ I ___________ }- _______ ~~7°~~'I~,1 I' ~~:
1--<':>2L V SYNC
INPUT
LINE ALTER
FIXED PS SECTION
r--------------------~
: I C60, D65, ,C653 I
060l,C605 I I T601 D652,C652 1+85VK'
rl ;!~::~;.o" t+~1SWITCHI NG [J IiA ',W"W,ONI fT -v-
I I ,J" 1
r-- ___ J ORIVE" :
TO OEF PW8
PWE-207C
CONTROL PWB
VR, \-0---J
CONTRAST I :
IC557,IC555
U PHASE \
I ICONTROL I
IC453
CO~P.l
RATQR
r
Ie 402
SIDE PIN h rl V OUTPUT
-- 4-~---
~~
V V V
BLANK
DRivE V.OSC SYNC
~
.PRE VCO A-C S~YNC
DRIVE I"" 5EP
~I l - (C401
H
LI NE.lR
H
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'. ,
~+-Jv
II }-
.,," ,"~,~
: . , _I i:L_P,",OOTHING tit 4VK2
ICR60' I ?C601 TR6S' I
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:
[STARTER1-- I I OSCI ~l.r-K;--, ERROR -1 i ..
,I rCONTROL tt~-' AMP r:
I 1
L. ___________________________ J
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t
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: PC6_02 TR652,TR6}4-3
I 05C/ - ~-t;1 ERROR
I CONTROL ~.:LJ AMP I
i I I
I to-. I
L ____________________ ~
PWE 198
SW REG PW8 VARIABLE PS SECTION
SW2
TEXT SW
S'II3
TEXT COLOR
VR3
V.POSITlOtJ
VR4
V. SIZE
VR5
H POS(TION
PWE-207D
-<:r-
I 1
lessI, IC552
TR5E I,TR5E2
EJ--
TR5l)1 r~5""'2
L-~---- ____________ ~H~'~J~:~R~O~TE~-~-T~O~R~~-----r~~
"1
IC554
IC502
I '2V REG
VR PWB
L- _________________________________________________________________ C-.-J'~C2
P\IJE-194
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I
B. Mechanical Description (See below diagrams)
1. Cabinet:
2. Dimensions:
Front
- - -'- I-- -
,
LI! 8J
L;:: 5 ~
3. Tilt Swivel Range
4. Weigtlt:
5. Controls
Rear Controls:
Front Controls:
6. Input Signal Terminal:
7. Power cord
In case of JC-1402HMEE, the end of
power cord is as follows.
~
'"
t--
M
Molded plastic cabinet with attachable tilt swivel base.
360(W)X372(H)X400(D) mm
Side
1'----
i
,
i
~r
!
I
'LI~J
400m1
16 kg
MANUAL SWITCH
MODE SWITCH
COLOR MODE SWITCH
POWER SWITCH
BRIGHTNESS CONTROL
CONTRAST CONTROL
V. POSITION CONTROL
V. SIZE CONTROL
H. POSITION CONTROL
H. SIZE SWITCH
TEXT SWITCH
TEXT COLOR SWITCH
9 PIN D-SUB CONNECTOR (FEMALE)
(SEE PAGE 2 FOR PIN ASSIGNMENTS)
~
- --- ---Green and yellow Earth
~- _ .. _n_ Blue: Neutral
-----~y=:==.::.::::j -- -Brown: Live
-1-
.-

•
GENERAL
MultiSync II, The Intelligent Monitor, from NEC, is a high resolution color monitor that automatically
adjusts to graphics board scanning frequencies from 15.5kHz to 35kHz (Horizontal), 50Hz to 80Hz
(Vertical). MultiSync II gives IBM PC, PC/XT, PC/AT, Personal System/2 (PS/2) and compatible
computers users of crjsp text and vivid color graphics displays when used with any of the IBM graphics
adapters (the CGA, EGA, PGC, VGA or MCGA). MultiSync II can also be used with other IBM compatible
graphics adapters to provide users with the widest range of color monitor compatibility and capability
available in the market place.
FEATURES
• MultiSync II automatically scans all horizontal frequencies between 15.5kHz and 35kHz, and all
vertical frequencies between 50Hz and 80Hz.
• MultiSync II is compatible with the IBM PC, PC/XT, PC/AT, PS/2 and look-alikes.
• MultiSync II is compatible with the IBM Color Graphics Adapter, the IBM Enhanced Graphics
Adapter, the IBM Professional Graphics Controller, the IBM MultiColor Graphics Array, the IBM
Video Graphics Array and other IBM compatible graphics adapters.
• MultiSync II's wide compatibility makes it possible to upgrade boards or software without purchasing
a new monitor.
• MultiSync II has a maximum horizontal resolution of 800 dots and a maximum vertical resolution of
560 lines for superior clarity of display.
• MultiSync II offers both TTL and ANALOG signal inputs, and in the ANALOG mode can display an
unlimited palette of colors depending on the graphics board and software being used.
MultiSync II automatically adjusts to' either a TTL signal input or an ANALOG signal input.
• MultiSync II features a TEXT SWITCH (TTL mode only) with a choice of three colors (paper white,
amber and green) displaying word processing, spread sheets, databases or other software in crisp
alphanumeric text on a black background.
• MultiSync II has a 14 inch diagonal display and a large, 13 inch viewing area.
CAUTIONS
When setting up iJnd using the MultiSync II pay special attention to these points
• To eliminate eye fatigue, don't use the MultiSync II against a bright background or where the sun or
other lights can directly shine on it.
• For optimum viewing, the MultiSync II should be just below eye level.
•
Allow adequate ventilation all around the MultiSync II so that heat from the monitor can properly
dissipate.
• Don't rest the MultiSync II or other heavy objects on the power cord. A damaged power cord can
cause fires or electrical shocks.
• Keep the MultiSync II away from high capacity transformers, electric motors and other strong
magnetic fields.
• Don't drop the MultiSync II when transporting it.
• Don't use the MultiSync II in damp, dusty, or dirty places.
-·2-
.-

I
PIN ASSIGNMENTS AND SIGNAL LEVELS
MANUAL SWITCH OFF
SIGNAL
TTL
CGA/EGA COMPATIBLE
D-SUB Type 9-P
@@@@Ci)
(9'J@0@
ANALOG
PIN Nd
16 COLORS 64 COLORS PGC COMPA TIBLE VGA/MCGA COMPATIBLE
---------
f--
Gf
10UND GROUND -RED
-RED
-----
2 GR
OUND SECONDARY RED -GREEN -GREEN
3 RE0 PRIMARY RED -BLUE -BLUE
4 GREEN PRIMARY GREEN COMPOSITE SYNC H.SYNG.
5 BL
UE
PRIMATY BLUE 6MODE CONTROL V.SYNC
6 IN
TENSITY SECONDARY GREEN RED GROUND RED GROUND
------------
--CONNECTION SECONDARY BLUE
GREEN GROUND GREN GROUND
-_._-
---
f----------------
SYNC
H.5YNC BLUE GROUND BLUE GROUND
YNC
V.SYNC GROUND GROUND
MANUAL SWITCH ON
---,,------------------------ -------------- --------,
SIGNAL
PIN
No
2
3
SECONDARY
RED
-GREEN
RED PRIMARY -BLUE
RED
• HIVSYNC
ON GREEN
----------
----- -GREEN----- --p~~~~~y-- - -H SYNC----
l
H/V S-YNC -r -- --::.---
-------- ----- -_. ------- ._- ------- _._---- ---- - - ----- -------- - - - -- - - ------
BLUE PRIMAflY V SYNC LiMODE CONTROL
BLUE
--- - - ---- -- ---
6 ----
-- -[- -IN-rEt,J.5ITY- SECONDAfW
GREEN
----.-~- -------~ ----- ------
INT ENSITY
VIDEO
SECONDARY GROUND
BLUE
11 H SYNC
9 -------V-SYNC
______ _____ ___ _ ________________________________ L- __________________ ----'
" means GFlOUND or NO-CONNECTION
"6" means mode control of vertical height
Normal vertical height at TTL high level or no-connection_
Approx. 20% increased vertical height at TTL low level or grounded_
SIGNAL LEVEL
All signal levels. except for those listed below. are TTL
"e" means 0_7Vp-p (VI DEO)
means 07Vp-p (VIDEO). 0_3Vp-p (SYNC.)
-3-
.-

•
TIMING CHARTS
SEPARATE SYNC.
HORIZONTAL
VERTICAL
I" 0 .. I ..
COMPOSITE SYNC.
VIDEO
o
..
VIDEO
R
o
u
J
u,-----
.. ! Sync. Polarity: Positive/Negative
____ ~I I r--
HORIZONTAL I~"_c .... 1_. ___ o"-- __ ..... I• .-=E'-1.1
J2i .. ~U
VERTICAL
.~
Sync. Polarity: Positive/Negative
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COMPOSITE SYNC. & VIDEO (SYNC. ON GREEN)
HORIZONTAL
-4~1------~'------~j
>-----_._.- -----~--- ... -
VERTICAL
PRESET TIMING
r--'---~'-------:--
CGA EGA
COMPATIBLE COMPATIBLE
----_.
IH 15.85kHz 22kHz
r--------
1------.--
--_._.
A /lS
63 45.5
f---.-~--
---------
----------_.
B I'S
4.2 4.9
PGC
COMPATIBLE
30.48kHz
33
---~
I
---.....I- -;~- ~
I
.-~-----'
Sync. Polanty: NegatIve
VGA/MCGA
COMPATIBLE
31.5kHz
-----
31.77
-- ----~---------------
4.5 3.77
f--
-- ---------- ---
t---g.J1.2..~.
7.2 1.6 2.8 1.89
r--..Qp~--
45 39 25.6 25.17
E
/lS
6.6 0
0.1
0.94
--------
r------- --
Iv 61 Hz 60 Hz 60 Hz 70Hz 60Hz
._---
--- ---""---
- .. ----~
--------
--
Oms
r------~--
1---
16
.4
16.68 16.6 14.27 14.27 16.68
P ms
00.75 0.6 0.07 0.064 0.064 0.064
r--.-----~
-----~
.-----
._---
Q ms
1.525 0.08 2.12 1.88 1.08 1.02
1-----_.
R ms 12.6 16 13.05 11.126 12.716 15.246
S ms 2.2 0 1.36 1.2 0.41 0.35
r---- ---- --
SEPARATE SEPARATE HIV SEPARATE SEPARATE SEPARATE
SYNC. SYNC. COMPOSITE SYNC. SYNC. SYNC.
REMARKS H. SYNC. H. SYNC. SYNC.
H. SYNC.
H. SYNC. H.SYNC.
POSITIVE POSITIVE
POS!TIV.E
NEGATIVE
NEGATIVE
V.SYNC V SYNC.
V. SYNC·
V. SYNC. V. SYNC.
POSITIVE
NEGATIVE NEGATIVE POSITIVE NEGATIVE
L.....-........_~ __
-4-
.-

•
ADJUSTING THE REAR CONTROLS
"'I
Fig. 1
MANUAL SWITCH
COLOR MODE SWITCH
D SUB 9PIN TYPE (TTUANALOG)
o MANUAL SWITCH
This switch selects either the IBM mode when OFF or the manual mode when ON_ When this switch is
OFF, MultiSync II automatically works in the IBM mode and adjusts itself to the scanning frequency,
resolution and color requirements of the IBM compatible graphics adapter being used_
When this switch is ON, the user must manually select the mode (gray/color) and the number of colors
(8/16/64) needed by the graphics adapter being used with the MODE SWITCH and COLOR MODE
SWITCH_ (see No_ 00 below)
8 MO DE SWITCH
This switch selects either the gray scale or color with a TTL signal input. (See APPENDIX B pin
assignment of gray scale_)
Refer to the user manual accompanying the graphics adapter for information on the input signal.
e COLOR MODE SWITCH
One of tile four color configurations [8/16(NEC)/16(IBM)/64] must be selected when using non-IBM
compatible graphics adapters_ The proper configuration can be selected by using the COLOR MODE
SWITCH as shown below
~---- .. ------ - ----- ----- --------- ----"~-------~
COLOR MODE SWITCH
-----------------+-----------
8 colors 8
____________________ -+ ____ ----'- _____ --l
COLOR MODE
16 colors with low intensity yellow
16 (NEC)
16 (IBM)
-- ------------------ ------'-----'-------
16 colors with IBM brown
64 colors 64
---------------------------'---------------
Note
This switch should be set correctly in relation to the input signal of the ~raphics adapter used_
Refer to the user manual accompanying the grapllics adapter for information on the input signal_
-5-
.-

•
ADJUSTING THE FRONT CONTROLS
~
CONTRAST CONTROL
BRIGHTNESS CONTROL
POWER SWITCH
TEXT COLOR SWITCH
TEXT SWITCH
o V. SIZE CONTROL
I H. SIZE SWITCH
o H. POSITION CONTROL
• POWER SWITCH
Used to turn the Power ON or OFF.
When the power is ON, the power LED indicator is lit.
• BRIGHTNESS CONTROL
Used to adjust the picture brightness of the screen.
o CONTRAST CONTROL
Adjust the display to the contrast preferred by the user.
8 V. POSITION CONTROL
Adjust this knob for the proper vertical position of the display. Turn the knob clockwise for a higher
display position; turn it counterclockwise for a lower display position.
o V. SIZE CONTROL
Adjust this knob for the proper vertical size of the display. Turn the knob clockwise for a larger display;
turn it counterclockwise for a smaller display.
o H. POSITION CONTROL
Adjust this knob for the proper horizontal position of the display. Turn the knob clockwise to reposition
display to the right; turn it counterclockwise to reposition to Hie left.
~6~
.-

•
• H. SIZE SWITCH
Adjust this switch for the horizontal size of display preferred. Wh~n this switch is ON, the width of the
display can be made wider.
4D TEXT SWITCH
-.
This switch controls the text mode of the MultiSync II.
When it is ON, the text will appear in the color displayed by the TEXT COLOR SWITCH (see No.12
below), regardless of the colors of the software program being used.
When it is OFF, the
color of the software program being used will be displayed.
Note
The TEXT SWITCH works only in the TTL mode.
CD TEXT COLOR SWITCH
Use this switch to select the text color-green, amber or paper White-when the TEXT SWITCH is ON.
Also use this switch to select the gray scale color-green, amber or paper white-when the gray scale mode
is selected (see No.2) regardless of the position of the TEXT SWITCH.
-7-
.-

•
THE METHOD FOR REMOVING AND MOUNTING THE TILT SWIVEL BASE
[zJ
[1]
Base B
Base A
Screw "a"
Base A
/f
Square hole of rear cover
[_{lin case you remove the turning table, take a reverse
Sequence from [11-- OJ .
-8-
CD Insert 3 mounting screws "a" into holes on the turnin~.
table A. -
® Arrange the 3 male screws "a" into the female Screws
on the bottom of the Set in correct.
Screw the table A to the set driving 3 screws "a" with a
philips head screwdriver.
(I) Align the arrow of both tables A and B, and put the table
B, into the table A as shown on the left.
(2) Both tables are fixed firmly by turning the table B 1800
degrees clockwise.
After completing the attachment of the turning table in
Sequence OJ - ill ,place the set in its proper position.
It is recommended that the Set should be used with its
face
coming to the printing side on the turning table.
NOTE:
Please avoid a harsh handling to turn the Set vertically or
horizontally.
.-

I
F
DISASSEMBLY OF THESE MODELS
Warning; This equipment generates and used radio frequency energy and if not reconstructed
properly, ie., in strict accordance with the following instruction, it may cause interference to
radio or television reception.
1. Remove the two screws 0, the two screws ® and one screw@ pull the Cabinet Back bakcward to the
rear.
'"
...
,.
,wG~
. . ... inet Back
,- I
hid
• • -©
®
Note: To prevent the occurrence of a gap between the Cabinet Front and the Cabinet Back when
attaching the Cabinet Back, be sure to tighten the screws in the order of 0 to ®
2. Remove the 9 screws ©, then lake off SHIELDING © and @.
SHIELDING ®
,'r "
i/._ lillI/III III/III /,-
/11/1111111/1111 '
. /1111111111111/11 '
'2. II III III!,' /III ~ I
-- 9-
.-

I
2' As for model JC-1402HMED
Remove the 11 screws@1 and one screw CD, then take off ~
PLATE, SHIELDING.
1111111111111111 /.
} 1111111111111111
; 1111111111111111
1111111111111111 ~ I
I r ~ ...... ,,~. ' •
, ..
_ .. 't~~ .. ". .... ,:- ~ ~_
PLATE, SHIELDING
3. INTERFACE PWB UNIT DISASSEMBLY
Remove the 4 screws @, then take off the SHIELDING @.
Disconnect the connectors from the INTERFACE PWB UNIT.
Remove the 2 screws, ® then take off the INTERFACE PWB UNIT.
10-
.-

•
3' As for model JC-1402HMED
Remove PLATE, SHIELDING 0 and then take out the INTERFACE f¥lB UNIT as the
instructions bellow.
Remove the 4 screws @, then take off the SHIELDING 0.
Disconnect the connectors from the INTERFACE PWB UNIT.
Remove the 2 screws, CD then take off the INTERFACE PWB UNIT.
•• t • ~ t - I .,.. , .,
~ . ~ /;"'~'~~~:~}~ " .- : .'
,~·,,·~#~· ....... ~'ft~I'f.":~"~(~"~ _ ........
¥ •• 1t ,,;..(. . 'J
~
® SHIELDING @
)1
4. SW. REG. UNIT. DISASSEMBLY.
r-
I
I
I
I
1.- -
r .. ·.
I
I
I
L
Disconnect the connectors C. K. SW and DEGAUSSING COIL from the SW. REG. UNIT.
Remove the 2 screws 0, then take off the SW. REG. UNIT.
' .. -L Ii+
'.,r---. , __ 4~~~~
., ~/II II filII 1I11-'---='::"'-'ii,,:;'i, ---- SW Fl EG LJ NI
'I i !!!!!!Ill! III/II
/ 111/111111111111
f"": II I III! /I.'. 1/// .~ I ®
11-
~
,
...
•
-
.-

•
PARTS LOCATION DIAGRAMS
DEF PWB ASSY (PWE-194)
l11il@NON
RIi? ---~Fl!~~-.
mu
R o
K3 K? K 1
00::::0
S7
S6
S"
S~
S3
S7
SI
f'
--- ------
o
A VR551 H. F-V ADJ M TP2002A
--"-- -------- - .. - - ------------~--.------ -- -- ----- -----
B TP551 H. F-V N TP2001A
VR552 15 8Sk
VRS,,] nk
f B T
\
.-.------ ----.------- -.... -- -.---- -~--.- .. - .----.---.------------------1
C VR401 V.HOLD 0 VR402 SUB V. HEIGHT
--.-- --- -.- -----.--------.--------- ----.- ---------------------_._--1
o TP501 H. HOLD P VR405 V LIN
~-.---- .. - ----------------- .. - .. --------- t---.---- .. -- -- .---------------------1
E VR502 H. HOLD 2 0 L506
~-- .- - ._--------------------- -- --- ------ -~----------------.--.----~
F VR501 H. HOLD 1 R L505 H. WIDTH COIL
... _------- -.-------.----.-----~--------.- . --- -~--.-.-
G TP503 (GND) S VR5C1 TP502 6V ADJ.
- ... --.-----.------.-------1
TP5E1 (16V)
~~ -_·_·_·_-----------_·_------_·_--+----<1-----
H T VR403
SIDE PIN
-- 12-
.-

I
1
LED PWB ASSY PWE-207E
2
VR PWB ASSY
PW~i-207D
3
INTERFACE PWB ASSY PWE-207B
4
VIDEO PWB ASSY PWE-207A
5
CONTROL PWB ASSY
PWE-207C
5
~-~----,-"------------~--~-
X VR3 V. POSITION
---- ---~--- ------ ---.-~---.-
CC SW3 TEXT COLOR
f------1,-~-
Y VR4 V SIZE
.----j~---- ----.~------- .-----.------~-
DD VR701 SUB. CONT
f--~~+-------------------- --~--~------------------
Z VR5 H. POSITION EE VR2 BRIGHT
VR1 CONTRAST
r------
AA SW1 H. SIZE
--.----------.---~~--+-------.~~
FF
r--·~-r-~~-~--~------4_--
t-------~----·-·
BB SW2 TEXT
-----------'-.-~-'-----.-----
.-
-13 -

I
INPUT PWB ASSY (PWE-206)
GG
HH
"
LL
KK--"
JJ
GG
SW803 COLOR MODE
JJ VR803
HH
SW802 MODE
KK
VR802
II
SW801 MANUAL
LL VR801
CRT PWB ASSY (PWE-203)
MM
, CRT SOCKET
SS TT
t
MM VR904 I~Q
----- - -- ----+----------------1
NN VR905 RR
~~- -~::~~-------------.------ - ~~--
------"-- ~ -"'-"---------------------- .------~- ------
VR902 A
VR903
TP901
TP902
.-
- 14 --

I
SW. REG. PWB ASSY (PWE-198)
CONNECTOR"K"
'L
..
- 15-
CONNECTOR"C"
•
e·
~ / VR652 REF
·11
.LV-VR653 V. LIMITER
,'t:-I
, if'-
~II
CONNECTOR
"DEGAUSSING COIL"
CONNECTOR"SW'
.-

•
ADJUSTMENT PROCEDURE
Standard Adjustment Conditions
1) Power source voltage: AC220V~240V 50 Hz.
2) Aging: Adjust after leaving power on for 20 minutes or more.
3) Signals:
Video Analog 0.6Vp-p 750 terminal Positive polarity
Analog Sync. on green
Video: 0.6Vp-p
Synchronizing 03Vp-p
Synchronizing TTL level Negative polarity/positive polarity
Separate/composite
Deflection frequency: H. 15kHz - 35kHz
V. 50 Hz - 80 Hz
Unless otherwise specified, use signal 14 (22kHz EGA mode).
1. SW. REG. UNIT
1) +B, (VR651)185V LINE
Adjust VR651 to be 85 VDC
2) t BUM (VR653) V.limit (C1-Gnd Voltage)
Remove C-connector
Adjust VR653 to be 122 Volts.
Note: Do not operate the SW. Reg. unit itself without any load.
3) t BH (VR652) High Voltage control
This control is permanently sealed at factory
Do not attempt to readjust.
2. Pre-adjustment of DEF PWB
Apply 24V DC between K2 and K3.
For sections 3) and 4). the JC-1402HMA INTERFACE PWB ASSY S connector outPlit can also be
used as a TESTING EOUIPMENT
1) I 16V adjustment
Adlust VR5EI for 16V t 0.05V DC between TP5El and the ground.
2) t6Vadjustment
Applya resistance load of 1001 OW between HC2 and HC3.
Adjust VR5CI for 6 t 0.05V DC between TP502 and the ground
3) I-:lorizontal FIV convertor adjustment (signal 17)
Input fH ccc 25kHz hOrizontal synchronizing negative polarity 5Vp-p between S7 and the ground
Adjust VR551 for 10 ±0.05V DC between TP551 and the ground.
- 16-
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•
4) Vertical FIV convertor adjustment (signal 17)
Input fv = 60Hz vertical synchronizing positive polarity 12Vp-J'I between S6 and the ground.
Adjust VR451 for 5.95 ±0.05V DC between TP451 and the ground.
5) High voltage protector setting
High voltage protector 1
With 32.0 ±O.W DC applied between TP20().1 A and the ground,adjust VR2001 for 0.3 ±0.05V
DC between TP2001C and the ground.
High voltage protector 2
With 31.8 ±0.1 V DC applied between TP2002A and the ground, adjust VR2002 for 0.3 ±005V
DC between TP2002C and the ground.
Due to DHHS,after adjusting VR2001 and VR2002 seal with an adhesive (TSE-385RTV)or cap
(74007891).
3. Main Adjustment
Set the external VRs and switches as follows unless otherwise specified.
Front controls (as seen from front)
VR1 CONTRAST: Max. (fully clockwise)
VR2 BRIGHTNESS: At point where back luster disappears.
VR3 V POSITION:
VR4 V.SIZE
VR5 HPOSITION:
SW1 H.SIZE:
SW2 TEXT:
SM3 TEXT COLOR
Rear controls (as seen from rear)
SW801 MANUAL:
SW802 MODE
SW803 COLOR MODE
3-1) DEF PWB Adjustment
(1) Horizontal Hold
Mechanical center
Center click position
Center click position
Off (small)(left side)
Off (left side)
Paper white (left end)
Off (left side)
Color (right side)
8
colors (left end)
a) Short TP501 and TP503 (GNO).
b) Receive signal 16 (fH: 30kHz) and adjust horizontal hold (1) VR501 so that there is one
screen.
c) Receive signal 18 (IH: 20kHz) and adjust horizontal hold (2) VR502 so that there is one
screen.
(2)
Vertical Hold
Receive signal 14 (Iv: 60Hz), turn vertical hold VR401 and set to the mechanical center within
the indented range.
(3)
High Voltage Adjustment
Receive signal 16 (fH: 30.48kHz) and adjust high voltage adjustment VR2003 so that the high
voltage is 23.5kV with the the CRT anode current cut off.
Due to DHHS,after adjusting seal with an adhesive (TSE-385RTV) or cap (74007891).
(4) Horizontal Raster Centering Signal 14 (Adjust at VGA H: 31.5kHzlV 60Hz, 350 line mode)
Check that the horizontal linearity is suitable. If it is extremely bad, adjust to a suitable point
with L506.
--- 17 --
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II
If the screen is rolling, centering can be adjusted with horizontal position VRS, but after return
VRS to the center click position. ~
Turn the brightness control fully clockwise so that back raster appears, then reinsert
connector RH so that the back luster is in the center of the CRT screen.
Reinsert connector RH where there is no extreme lack of or break in the raster.
Set the luster centering with the manual switch off (to the left as seen from the back) and the
horizontal size switch on (widened).
CRT
t
z.
1° 0\ . No oo""Hoc
For horizontal correction, set with the direction
of the connector.
o 0 • -. Little correction
o 0 • -. Much correction
NOTE: Due to overscanning, Signals of fH: 18kHz or lower cannot be set.
(5)
Horizontal Position (Adjust to the raster center)
Input the signals below and adJust so to the center of the raster. The order is not important.
NOTE:
Signal
CGA fH
15.85kHz
TTL signal 10
EGA fH 22
kHz
TTL signal 14
PGC fH.
30.48kHz
TTL signal 16
PS/2 fH 31.5
kHz
TTL signal 1
The TTL/analog setting should be correct.
The manual switch should be off.
(6) Vertical Linearity
VR
VR552
VR553
VR554
VR555
a)
Receive signal 12 (fH: 18kHz) and adjust VR402 for the suitable vertical screen size.
IJ) Ad/ust VH405 for the optimum vertical linearity.
(7) Vertical Sub Height
Receive EGA signal 14 (fH: 22kHz) and adjust VR402 for a vertical screen size of 180mm.
-~18 ~
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