Tatung OMNISCAN SERIES User manual

Service Manual
COLOR MONITOR
OMNISCAN SERIES
CM17MBDjH/R
CIYI20MBDjHjR
- CTATUN& -------

TABLE OF CONTENTS
1. G EN ERAL ----------------~----------------------------------------------------------------------------- 1-1
1.1 SAFETY ------------------------------------------------------------------------------------------------------------------ 1-1
1.2 SPE CI FI CA TI 0 NS ---------------------------------------------------------------------------------------------------- 1-1
1.3 CONTROLS ------------------------------------------------------------------------------------------------------------ 1-3
1.4 MAKI NG CONN ECTI 0 NS ---------------------------------------------------------------------------------------- 1-5
2. ADJU STM ENT --------------------------------------------------------------------------~------------- 2-1
3. CI RC UIT DESCRIPTION -------------------------------------------------------------------------- 3-1
4. FLOW CHART ---------------------------------------------------------------------------------------- 4-1
5. SIG NAL IDENTIFICATION TABLE -------------------------------------------------------------- 5-1
6. TROUB LE SHOOTING------------------------------------------------------------------------------ 6-1
7. REPLACEMENT PARTS LIST ---------------~---------------------------------------------------- 7-1
8. PCB LAYOUT ---------------------------------------------------------------------------------------- 8-1
9. ASSEMBLY METHODES -------------------------------------------------------------------------- 9-1
10. CI RCU IT DIAG RAM S--------------------------------------------------------------------------------10-1
= 1-0 =

1. GENERAL
1.1 SAFETY
WARNING:
DANGEROUS VOLTAGE
ARE PRESENT IN THIS CIRCUIT WHENEVER POWER IS CONNECTED TO THE CIR-
CUIT BOARDS,
EVEN THOUGH THE PRODUCT POWER SWITCH MAY BE IN THE 'OFF' POSITION. PROPER
SAFETY PRECAUTIONS MUST BE TAKEN TO ENSURE THE SAFETY OF PERSONS WORKING ON THE
BOARDS.
POTENTIOMETER ADJUSTMENTS:
R481, R626, R818, R640, R211 SHOULD BE ADJUSTED TO CORRECT POSITION DURING FUNCTIONAL TEST.
1.2 SPECIFICATIONS
17" SPECIFICATIONS
Picture Tube
Resolution
Display Colors
*Display Area
Video Input
Video Bandwidth
Scanning Frequency
Sync. Input Form
Applications
Power Input
Power Consumption
Weight
Dimension
(W /0 base)
Safe Standard
EMI Standard
Standard Accessory
Optional Accessory
Recommended
Ambience
17 inch (16V), Dark Tinted, Anti-Glare,
.0.28/0.31 mm
dot pitch (option)
90 degree deflection.
(Dynamic focus/Single focus option)
640 x 350 (min.), up to 1280 x 1024 (max.)
unlimited
290 mm x 218 mm (typical)
Analog-RGB (positive)
BNC:
100 MHz
D-SUB:
70 MHz
Vertical: 50Hz to 90Hz (Automatic)
Horizontal: 29KHz to 66KHz (Automatic)
Separate Sync.
Sync. on green
Composite Sync.
VGA, XGA, 8514A, PGC, MACII
CAD /CAM, Workstation, etc.
Switch Selectable
AC 100 to 125V (60Hz)
AC 200 to 240V (50Hz)
120W (max.)
21.5KG/24.5KG (N.W.jG.W.)
411 x 380 x 480 mm (W/H/D)
UL/CSA, TUV Optional
FCC Class A model, Fh: 29KHz to 66KHz
FCC Class B model, Fh: 29KHz to 62KHz (Class B)
Fh: 63KHz to 66KHz (Class A)
FTZ Optional
Tilt/Swivel Base
(47 mm height)
0-15 pin to Mini 0-15 pin signal cable.
Power cord
signal cables (BNC)
Operating Temperature: + 0 to +35 degree
C,
Storage Temperature:
Humidity: -
20 to + 60 degree C,
10% to 80 %
(32 to 95 degree F)
(-4 to 140 degree F)
* Approximate only. Active display area depends on actual signal timing.
* Specifications subject to change without notice.
= 1-1 =

20" SPECIFICATIONS
Picture Tube
Resolution
Display Colors
*Display Area
Video Input
Video Bandwidth
Scanning Frequency
Sync. Input Form
Applications
Power Input
Power Consumption
Weight
Dimension
0N /0 base)
Safe Standard
EM! Standard
Standard Accessory
Optional Accessory
Recommended
Ambience
20 inch (19V), Dark Tinted, Anti-Glare,
0.31 mm dot pitch 90 degree deflection.
(Dynamic focus/Single focus option)
640 x 350 (min.), up to 1280 x 1024 (max.)
unlimited
350 mm x 262 mm (typical)
Analog-RGB (positive)
BNC: 100 MHz
D-SUB: 70 MHz
Vertical:
Horizontal:
50Hz to 90Hz (Automatic)
29KHz to 66KHz (Automatic)
Separate Sync.
Sync. on green
Composite Sync.
VGA, XGA, 8514A, PGC, MACI!
CAD/CAM, Workstation, etc.
Switch Selectable
AC 100 to 125V (60Hz)
AC 200 to 240V (50Hz)
135W (max.)
28.5KG/32.6KG (N.W./G.W.)
480 x 420 x 540 mm (W /H/D)
UL/CSA, TUV Optional
FCC Class A model, Fh: 29KHz to 66KHz
FCC Class B model, Fh: 29KHz to 62KHz (Class B)
Fh: 63KHz to 66KHz (Class A)
FTZ Optional
Tilt/Swivel
Base (47 mm height)
0-15 pin
to Mini 0-15 pin signal cable.
Power cord
signal cables (BNe)
Operating Temperature: + 0 to +35 degree
C, (32 to 95 degree F)
Storage Temperature: -20 to +60 degree C, (-4 to 140 degree F)
Humidity: 10% to 80 %
* Approximate only. Active display area depends on actual
Signal timing.
* Specifications subject to change without notice.
1-2 =

1.3 CONTROLS
17" FRONT{REAR PANEL CONTROLS
f.
II fi!iiil
-I
Push open
"'tn .. "'0. ..e- .. ~ -0·
:3
-----
.. 0.
8. V.
SIZE'
6. V. PO SITION-
7.
H. SIZE-
1. POWER LED
.
.. • l:!:t
2. POWER SWITCH
~4.
SRI GHTNESS CONTROL
3.
C
ONTRAST CONTROL
lb.d
@o5l E
I
9.
11. MEM
10. MODE
DPC
ORY RECALL
SWITCH
5. H. POSITION
Front Panel Controls
3. DEG]!'USSING SWITCH I!-+~;+---~
n
LJ
./
1. 115V/230V SWITCH -lJ--.j..g~--I::;:;--t--------l
2. POWER INPUT ~4--:~~+
'H+-I--+-+-l+- 4. BNC INPUT
CONNECTOR
7. SYNC. SW.
6. SIGNAL VOLTAGE SWITCH
5. D-SUB CONNECTOR
5. MINI D-SUB CONNECTOR
Rear Panel Control
1-3 =

20" FRONT{REAR PANEL CONTROLS
r=::::J I
"1l I
I
6. V. POSITION
7. H. SIZE
--
1. POWER LED
I
'£ t::2.
2. POWER SWITCH
J 3. CONTRAST CONTROL
\
4. BRIGHTNESS CONTROL
I PUSH OPEN
E11.
MEMORYRECALL
10. MODE SWITCH
9. DPC
L-- ______ 5. H. POSITION
Front Panel Controls
1. 115V/230V SWITCH
2. POWER INPUT
DEGAUSSING SWITCH
1'0 0
~
r-L.
>-:::
~
~
D
r'O
6~""
~
~\~
1 t
Rear Panel Control
1-4 =
a/)
y
-
f\t--
...... c"":::!
~
I
6.
5.
4. BNC INPUT
CONNECTOR
7. SYNC. SW.
SIGNAL VOLTAGE SWITCH
D-SUB CONNECTOR
5. MINI D-SUB CONNECTOR

1.4 MAKING CONNECTIONS
(1 )
IBM PC
Signal cable
(2)
Apple Macintosh LC
/
Signal cable
(3)
Apple Macintosh II
(SYNC. SW.)
ON
D
~--------......I D. SUB
(SYNC. SW.)
ON
D.SUB
D
~ _______ --J MINI
(SYNC. sw.)
ON
D.SUB
D
~ _______ ---I MINI
D. SUB
= 1-5 =

(4)
Other computers SYNC.
SW. )
( ON D
CABLEx4
(5)
Other computers SYNC.
SW.)
( ON D
R
G
Signal cable B
H
v
CABLEx5
(6)
Workstation SYNC. SW.)
( OFF
D
Signal cable R
G+SYNC.
CABLEx3
B
= 1-6 =

BNC CONNECTIONS & CABLE PIN ASSIGNMENTS
BNC Connections
R
CONNECTOR
R
G(jSYNC.)
B
H/HV
V
REMARKS:
G(jSYNC.)
SYNC. ON GREEN
RED
GREEN & SYNC.
BLUE
B
H/HV
COMPOSITE SYNC.
RED
GREEN
BLUE
H+V SYNC.
1. VIDEO SIGNAL LEVEL IS 0.7/1.0 Vp-p (SELECTABLE).
SYNC. SIGNAL LEVEL IS TTL.
2. "-" MEANS NO CONNECTION.
= 1-7 =
v
SEPARATE SYNC.
RED
GREEN
BLUE
H
V

D-SUB 15 PIN
MINI D-SUB 15 PIN
SIGNAL CABLE PIN ASSIGNMENTS
SIGNAL
PIN NO. FOR
PIN NO. FOR
D-SUB 15 PIN
MIN D-SUB 15 PIN
(MAC II)
01GA/8514A)
RED 2 1
GREEN/SYNC. ON
GREEN 5 2
BLUE 9 3
H
SYNC./H+V SYNC. 7
13
V SYNC.jV MODE 8
14
GROUND 1 4 6 11 13
14 467 8 10
11
OPEN PIN 3
10 12 15
5 9
12 15
= 1-8 =

TABLE OF CONTENTS
2. ADJUSTMENT PROCEDU RE -------------------------------------------------------------------- 2-1
2.0 STANDARD ADJUSTMENT CONDITIONS ------------------------------------------------------------------ 2-1
2.1 PRE-ADJUSTMENT OF POWER SUPPLY (PWB-1641) ------------------------------------------------ 2-1
2.2 PRE-ADJUSTMENT OF MICRO BOARD (PWB-1697 -2) ------------------------------------------------ 2-1
2.3 PRE-ADJUSTMENT OF MAl N BOARD (PWB-1640 /1701) ---------------------------------------------- 2-2
2.4 MAl N BOAR D (PWB-1640/1 701) ADJ U STM ENT ---------------------------------------------------------- 2-2
2.5 SCREEN POSITION, SIZE DPC, DIGITAL CONTROL -------------------------------------------------- 2-3
2.6 VI D EO AM P LlTU DE ADJ U STM ENT ---------------------------------------------------------------------------- 2-3
2.7 GAIN ADJUSTMENT ------------------------------------------------------------------------------------------------ 2-4
2.8
CUT OFF ADJUSTMENT ------------------------------------------------------------------------------------------ 2-4
2.9 CUT OFF FINE ADJUSTMENT 1-------------------------------------------------------------------------------- 2-4
2.10 CUT OFF FINE ADJUSTMENT 2-------------------------------------------------------------------------------- 2-5
2.11 BACKGROUND LUMINANCE ADJUSTMENT -------------------------------------------------------------- 2-5
2.12 FOCUS ADJUSTMENT---------------------------------------------------------------------------------------------- 2-5
2.13 PURITY ADJUSTMENT -------------------------------------------------------------------------------------------- 2-5
2.14 CONVERGENCE ADJUSTMENT -------------------------------------------------------------------------------- 2-6
2.15 TI MING CHARTS ------------------------------------------------------------------------------------------------------ 2-7
2.16 ADJUSTMENT SIGNAL
AND TIMING ------------------------------------------------------------------------ 2-8
2.17 SET THE USER SWITCH BEFORE PACKING -------------------------------------------------------------- 2-9
= 2-0 =

2. ADJUSTMENT PROCEDURE
2.0 Standard Adjustment Conditions
A. Power supply voltage: AC 110V, 60Hz.
B. Warm up time:
The display must be on for at least 20 minutes
before starting alignments.
This
is especially critical in color temperature
and white balance adjustments.
C. Instrument: CHROMA-2000 or similar PATTERN
GENERATOR
D. Setting:
(G+Sync.) Sync. Switch OFF (signal 86/88/89)
(H/V) Sync. Switch
ON (signaI81/82/83/84/87)
(H + V) Sync. Switch ON (signal 85)
* When G+Sync. output, simultaneously output a
H/V to the H. Sync. line, so the Sync. Switch
should set at "OFF". (Refer
2.15)
Signal Level switch 0.7V
Contrast Control Max.
Brightness Control Max.
E. Signals
Video: Analog 0.7 Vp-p,
75 ohm
Analog sync. on green
Video:
O.7Vp-p
Sync.: 0.3Vp-p
Sync.: TTL level NEGATIVE/POSITIVE polarity
Separate/Composite
(Refer 2.15).
(T erminated resistor 1 Kohm)
Scanning Freq.: H 29KHz -65KHz
V 45Hz - 1
DO Hz
2.1 Pre-Adjustment of POWER SUPPLY
(PWB-1641)
A. The POWER SELECTOR SW. is connected to Pin
A of PWB-1641, for the different line source
input.
Pin ALA
UL/CSA AC 115V SHORT
HONG KONG/EUROPEAN (TUV) AC 230V OPEN
B. Connect the Dummy Load Resistor with the
proper rating values shown below.
C. Set R818 to minimum position (fully clockwise,
viewed from component side).
Pin
4
3
2
R1
R2
R3
616
258
18.2
ohm/50W (approx.)
ohm/25W (approx.)
ohm/35W (approx.)
D. Adjust R818 (24V ADJ.) so that the voltage on
Pin 2 of P802 is as shown below,
TOSHIBA
17" HITACHI 17"/20" NEC 17"
TUBE TUBE TUBE
Pin 2 24.5V
616
258
T80l
P8l8 D
24V ~DJ.
POWER SUPPLY BOARD
PWB-1641 TOP VIEW
24V
~
P803
0801
r:::::=:J
A
ca05
o
C806 A
o
2.2 Pre-Adjustment of MICRO BOARD
(PWB-1697-2)
+
12V Adjustment
A. Apply 24V dc voltage to Pin 7 of P5D1.
24V
1l0VlSHOPT
220V20PEN
B. Adjust R556 (12V ADJ.) so that the voltage on
C503 is 12V (+/- 0.1V).
C. Check the voltage on C514 or R558 is 5.0V (+ /-
0.25V).
= 2-1 =

P!504
P!5OZ
10000001
6 , "
~,
T~47C:;v.N
~'
Os
C514~
PW9-1697-2 TOP VIEW /
MICRO BOARD ~
R556
~ P~56
IZV-J 0
lZV ADJ.
o
o
o
o
o
o
Q.'
2.3 Pre-Adjustment of MAIN PCB
(PWB-1640/1701)
+12V
(R211) Adjustment
A. Apply signal 89 (64KHz). full white pattern.
B. Adjust R211 so that the voltage on Pin 4 of P201
(or +12V test Pin) is 12V.
C. Check the DC voltage on Pin 3 of P201 is 5.98V
to 6.04V.
TP4'
o
0401
OGZO
0
11343
ope MJJ.
020?
0207 0 BCJE II
HEAT SINK 1-1
PlOI
R311 V.LIN~
o
fgl3
lQll
R314 V.SIZt:
o
+16~ Rt2S R640
o 0 0
H.V.AD.1. H.Y.
nos 1'203
~4 ~~~~
o 1'204 PZ02
P211
tl2V N1"J.
P403
10 01
,,481
] 0
H.SIZE
PPES!rl
04(0
8
HEAT stN!<
PWB- 1640 TOP VIEW
MAIN BOARD
PROTEan ON !>OJ.
2.4 MAIN BOARD (PWB-1640/1701)ADJUSTMENT
(1) Horizontal Hold (R422/R413/R420)
A. Short between T4 and GROUND (with 0.1uf/50V
capacitor).
B. Apply signal 89 (64KHz) and adjust H. hold 3
R422 so that the entire picture appears.
C. Apply signal 88 (48KHz) and adjust H. hold 2
R413 so that the entire picture appears.
D. Apply signal 80 (28KHz) and adjust H. hold 1
R420 so that the entire picture appears.
NOTE: ALIGNMENT PROCEDURE
64KHz -----> 48KHz -----> 28KHz
(R422) (R413) (R420)
(2) H. V. ADJ. (R626)
A. Brightness control and contrast control set at
fully clockwise (maximum).
B. Apply signal 89 (64KHz), FULL WHITE pattern.
C. Adjust R626 so that high voltage is 26KV.
(3) H. V. Protection (R640)
A. Apply signal 89 (64KHz), FULL WHITE pattern.
B. Adjust R626 so that protection voltage is
7.7V-7.8V.
C. Check the protection function:
Short
T1 and T2, the output (high voltage)
should shut down. Open the "short" and power
on again, the high voltage will back to normal.
(4) Horizontal Raster Centering
A. Apply signal 89 (64KHz).
B. If necessary, adjust the brightness control so
that the raster is faintly illuminated.
C. If necessary, press the width control (5501/
5502)
so that both edges of the horizontal raster
can be
seen.
D. Select P202, P203 or P204 (either end of the
plug), until the raster
is centered on the screen.
(5) Horizontal Width pre-setting (R481)
A. Apply Signal 89 (64KHz).
B. Adjust H. SIZE control 5502 to get minimum
width on the screen.
C. Adjust R481 so that the voltage on TP41 is Va
(see table).
D. Check the collector voltage of Q410 is 16.5V (+/
- 0.5V).
E. Adjust H. SIZE control 5501 to get maximum
width on the screen.
= 2-2 =

F. Check the collector voltage of 0410 is 20V (+ /-
1V), check the voltage on TP41 is Vb (+ /- 5V).
17" TOSHIBA 17" HITACHI 17" NEC 20" HITACHI
M41KJF26XX12 M41KKL80X-12 M41KMG23XX
M48KAY80X01
M41KMK26XX12
Va
Vb
122V
143.5V
95V
112.5V
124V
144.7V
114V
133.0V
* With the different CRT or YOKE the voltage of
Va/Vb should
set at the correct value. If it is not
correct setting, it may damage the output circuit
or lack of the enough width.
(6) Vertical size pre-set (R314)
A. Apply signal 84 (35KHz), crosshatch pattern.
B. Adjust V. SIZE control S505 to maximum.
C. Adjust V. SIZE pre-set R314 so the vertical height
is reach to the following values.
235 (+/-7)mm
278 (+ /- 3)mm
(7) Vertical Linearity (R311)
A. Apply signal 89 (64KHz), crosshatch pattern.
B. Adjust size control S506/S507 so that the
vertical
size is approximately (17": 218mm, 20":
262mm).
C. Adjust R311 so that vertical linearity is optimum.
(8) Side Pincushion (R343)
A. Apply signal 83 (VGA480), crosshatch pattern.
B. Adjust V. Size control S506/S507 so that the
vertical
size is (17": 218mm, 20": 262mm)
approximately.
C. Adjust H. size control S501/S502 so that the
horizontal
size is (17": 290mm, 20": 350mm)
approximately.
D. Adjust DPC control S513 to minimum.
E. Adjust DPC pre-set R343 so that the minimum
CONCAVE is 2mm to 2.5mm (measure to the
straight line).
F. Check the maximum BARREL. The value is
greater than 0.5mm when DPC control S512 set
to maximum (Apply 8514 signal).
2.5 Screen Position, Size, Side Pin Cushion,
Digital control
HOW TO PROCEED THE FACTORY SETTING?
A. PUSHING THE FACTORY SETTING SW. WITH
TIP THINGS AND POWER ON FOR 2 SECONDS
THEN RELEASE THE PUSHING.
* The FACTORY SETTING SW. is in side the
control cover (the first hole of the right side.)
B. During the setting (change MODE) or leave
setting for 4 seconds the data will be
saved into
the memory automatically.
C. After 4 seconds later, switch off the power and
power on again, the data stored inside the
memory will
be the factory setting data.
D. The data could be retrieved by pushing the
MEMORY RECALL Sw. (Second hole of the right
side)
E. If more than one signal requires readjustment,
please repeat steps
(A) through (C).
* For signal 1 to 9, check that the screen position
and size fall within the following limits.
(1) Screen Size
IT
20"
Horizontal 290(+
/- 5)mm 350(+/- 5)mm
(MAC-II) 280(+
/- 8)MM
340(+/- 8)MM
Vertical 218(+
/- 5)mm
262 (+ /- 5)mm
(MAC-II)
210(+/-8)MM
255(+/- 8)MM
Screen Position
Space between
bezel picture
Top
and bottom space difference: + /-5mm
Right and left space difference: + /-5mm
(2) Side Pin Cushion
A. Apply crosshatch pattern.
B. Check to if the side pin cushion distortion is
within + 1, -2 mm.
2.6 Video Amplitude Adjustment
* Check to make sure the video input signal is set
at the following level.
A. Video: Analog O.7Vp-p (75 ohm), not include the
sync. signal.
B. Sync. Switch: OFF
C. Signal: 89 (64KHz), crosshatch.
D. Initial Settings of Adjustment VRs.
R72t: Contrast
VR
fully clockwise
R722: Brightness
VR
fully counterclockwise
R032, R092, R152:
GAIN 1 VR
Mid'POINT
R081 , R141:
GAIN 2 VR Mid'POINT
SCREEN
VR
Mid'POINT
2-3 =

2.7 Gain adjustment
A. Adjust R032(R), R092 (G) , R152(B) so that the
terminals (Pins 1
of P901, POO2, P903) on the
CRT PWB are each set to 47Vp-p not including
the clamp pulse.)
* Please use the plastic adjusting pole to do the
alignment.
R G B
[§]l
'00' ~
[§]l
~o ,,,.~
l22l
~ 0 "" ~
~
RCI
0
R043
RI19 01
Gel
P179 31
Bel
R044 RIOS
RI04
PWB- 1642 TOP VIEW
VIDEO BOARD
ROB I
Ge'Z
o
RI63
RI64
RI41
002.
o
D£,D£,D£,
. RDI GOI BOI
---------~c!arrp pulse is
]~~~~~-
not I nc I uded
2.8 Cut-off adjustment
A. Initial setting of the adjustment VRs.
Rl19, R179:
CUTOFF 2 VR MID'POINT
R058, Rl18, R178: CUTOFF 1 VA MID'POINT
R722: Brightness VR fully clockwise
SCREEN VA: fully counterclockwise
B. Apply signal 89 (64KHz), crosshatch pattern.
C. Adjust G1 control ROO7 (PWB-1642-3) so that the
voltage on
Gl is Vc (See Table).
17" TOSHIBA 17" HITACHI 17" NEC 20" HITACHI
M41KJF26XX12 M41KKL80X-12 M41KMG23XX M48KAY80X01
M41KMK26XX12
Vc -90V
-60V
-OOV -70V
290.5
~
+
GI
R907
o
PWB-1642
DRIVE BOAPD
D. As SCREEN VR is gradually turned clockwise, a
signal color will appear. Turn the CUTOFF 1
VR
fully counterclockwise for this color.
E. Again, turn SCREEN VR clockwise gradually, a
signal color will appear again. This color
is the
reference color for the cut off adjustment. Set
the background color faintly appears with
SCREEN
VR. Use this as your reference then
adjust the other
two CUTOFF VRs (other than
the reference color)
to form a white background.
F. Measure the color temperature Xand Y.
NOTE:
X = 281 (+ /- 5)
Y = 311 (+/- 5)
* White tracking will be best at dark cut off
adjustment settings. For the best setting,
therefore, perform the cut off adjustment in.
as
dark a place as possible.
2.9 .
Contrast Tracking 1
A. Apply signal 89 (64KHz), full white pattern.
B. Initial Settings of Adjustment VRs.
R721:
R722:
R081,
R141:
Contrast VR
Brightness VR
GAIN 2 VR
fully clockwise
MID'POINT
MID'POINT
C. Adjust R GAIN 1 VR (R032) and B GAIN 1 VR
(R152).
D. Measure the color temperature X and Y.
X = 281 (+/- 5)
Y = 311 (+/- 5)
= 2-4 =

2.10 Contrast Tracking 2
A. Apply signal 89 (64KHz), full white pattern.
B. Initial Settings of Adjustment VRs.
R721: Contrast VR Adjust to obtain 3FL.
R722: Brightness VR MIO'POINT
C. Adjust G GAIN 2 VR (R081) and B GAIN 2 VR
(R141).
D. Measure the color temperature X and Y.
X = 281 (+ /- 5)
Y = 311 (+/- 5)
E. Check the color temperature X and Y between
the following condition:
X=281 (+/-15)
Y=311 (+/-15)
(1) Brightness MID'POINT., Contrast MAX.
(2) Brightness MID'POINT., Contrast
Adjust
to obtain > 5 FL
2.11 Background Luminance Adjustment
A. Initial setting of the adjustment VRs.
R722:
R721 : Brightness
VR
Contrast VR
MID'POINT
MIN.
B. Apply sign'al 89 (64KHz), crosshatch pattern.
C. Adjust SCREEN VR so that the background just
disappear.
2.12 Focus Adjustment
(1) Single Focus (TOSHIBA Tube)
A. Apply signal 89 (64KHz), crosshatch pattern.
B. Initial setting of the adjustment VRs.
R722:
R721:
Brightness VR
Contrast VR
MID'POINT
MAX.
C, Or receive the pattern with "e" character.
D. Adjust the FBT focus VR to achieve the best
focus at an intermediated point between the
center of the screen and the corner.
r-
~
I-
Best
focused
~
1'""
t
./
(2) Double Focus (NEC/HITACHI Tube)
A. Apply signal 89 (64KHz), crosshatch pattern.
B. Initial setting of the adjustment VRs.
R722:
R721:
Brightness VR
Contrast VR
MIO'POINT
MAX.
C. Or receive the pattern with "e" character.
D. Focus 1:
Should be adjusted so that the vertical lines
become narrowest in all over the screen.
E. Focus 2:
Should be adjusted so that the horizontal lines
become narrowest
in all over the screen.
F. Repeat the adjustment procedure in step 0 & E
until the vertical and horizontal lines are all clear
at center and corner of screen.
0
Best focused
v-.
-
I'-'
-
2.13 Purity Adjustment
A. Be sure the display is not being exposed to any
external magnetic fields.
B. Ensure that the spacing between the Purity
Convergence Magnet (PCM) assembly and the
CRT stem is 29mm (+/-1mm).
C. Produce a complete red pattern on the screen.
= 2-5 =

D. Adjust the purity magnet rings on the PCM
assembly to obtain a complete field of the color
red~ This is done by moving the two tabs in
suCh a manner that they advance in an opposite
direction but at the same time to obtain the same
angle between the two tabs, which should be
approximately 180 degrees.
F. Check the complete blue and complete green
patterns to observe their respective color purity.
Repeat steps A to 0 if needed.
R.B Static Convergence
r----purity _9n~h
Lock Ring
(Tum coun~rdockwi'"
to unlock Convergence
& Purity M:IIgnet.l
Clamp for Convergence
& purity Magnet
"-pol. ",,~ut. !!'at! 10 91:1 COII\'''~'''")
11
6
-,01& =,~.!a (C?,.er. I, We<;.~:= C~~ .. :;e~c.)
pidur. Tabe
2.14 Convergence Adjustment
* Before adjustment convergence,the vertical size,
linearity and focus adjustment must completed.
* Make sure the Purity is good before the following
adjustment.
A. Apply signal 89 (64 KHz), crosshatch pattern
(pattern 2).
B. The brightness level should be no higher than
necessary to obtain a clear pattern.
C. Loosen the convergence magnet lock ring,
converge the RED and BLUE lines at the center
of the screen by rotating the R-B static
Convergence Magent.
D. Align the converged RED/BLUE lines with the
GREEN lines at the center of the screen by
rotating the (R/B)-G Static Convergence Magnet.
E. Tighten the convergence magnet lock ring.
F. Remove the IY wedges and slightly tilt (do not
rotate) the deflection yoke horizontally and
vertically to obtain good overall convergence.
G. Secure the deflection yoke by re-inserting the
wedges.
H. Check convergence and Purity. If purity error is
found.
Please repeat the purity adjustment.
B/RG
I
~:r!11'!'nl~1 r~!»r!:-'I~b~~ 'ynellle.cul
- - - _ ~ - .L __ :/1' I
I pari .... th. ",dj .. "..... 1 by 0, .. 1.9
I Ihe ongl. b.I ...... Ih. loh.
I
Gro •• I. ~&9cnl. CA"YII, •• Ct
(nil.)
per/arm Ih. cdjUJI"..,ftl by ,pI.lnq
thl ongl. b.I ...... Ihe lab ••
I
I
8-----1
R----,...1-:..---
per for", t)e odlusl ..... "t by 'yllck,oftOUI
rolali .. af thl I ... Jobs.
RId la BI •• Canwlr9'.c,
(Mogulo)
..
~
I
= 2-6 =

2.15 Timing Charts
HORIZONTAL
VERTICAL
HORIZONTAL
VERTICAL
HORIZONTAL
VERTICAL
SEPARATE SYNC.
--u
~I. I~ B
/. 0 .1.
YlOEO
o
YlOEO
R
U
J
u,.----
o J Sync. Polarity : Positive/Negative
COMPOSITE SYNC.
I
VlOEO
I
/","C.I.
0
.I.E~I
12·S
rJ
A
~
Sync. Polarity : Positive/Negative
COMPOSITE SYNC. & VIDEO (SYNC.
ON GREEN)
V:OEO
o
A
= 2-7 =

2.16 Adjustment Signal and Timing
Adjustment signals (Nos. 1-9 : Preset Signals)
Sync. Polarity
No. Timing Signal SYNC. Hor. Vert.
1.
81
VGA 350 HjV
+
2.
82 VGA 400
HjV
3. 83
VGA 480 HjV
4.
84 8514A
HjV
+ + interlace
5. 85
PGC H+V
6. 86 MAC-II . G+Sync. #1
7. 87 800X600
(56) HjV
+j- +j-
8. 88 1024X768
(60)
G+Sync.
9.
89 1280X1024 (60) G+Sync.
10. 77
V. HOLD (50)
Fv=50Hz
11. 78
V. HOLD (90) Fv=90Hz
12.
80
H. HOLD (54) HjV
Fh=28.4KHz
#1 When G+Sync. output, simultaneously output a
HjV to the H. Sync. line, so the Sync. Switch should set
at
"OFF".
PRE-SET TIMING
77 78 80
81
82
83
1280X1024 VGA350 VGA400 VGA480
-------
Fh (KHz) 64.000 35.520 28.400 31.500 31.500 31.500
Ajls 15.620 28.150 35.200 31.770 31.770 31.770
BJLs
1.000 3.920 3.840 3.770 3.770 3.770
CJLs
2.000 1.250 4.400 1.890 1.890 1.890
DJLS
11.875 22.800 25.600 25.170 25.170 25.170
EJLS
0.750 0.180 1.360 0.940 0.940 0.940
Fv (Hz) 49.600 90.000 54.000 70.000 70.000 70.000
Oms 20.160 11.111 18.480 14.270 14.270 16.680
Pms 0.080 0.113 0.070 0.064 0.064 0.064
Oms 0.580 0.563 1.162 1.880 1.080 1.020
Rms 19.490 10.426 16.896 11.126 12.716 15.246
Sms 0.020 0.014 0.352 1.200 0.410 0.350
Sync.
G+Sync.
HjV HjV
HjV
HjV HjV
H+V
H + +
V + +
== 2-8 ==

84 85
8514A PGC
Fh (KHz) 35.520 30.480
Aj.1.s
28.150 32.800
Bj.1.s
3.920 4.000
Cj.1.s
1.250 2.800
Dj.1.S 22.800 25.600
Ej.1.s 0.180 0.400
Fv (Hz) 87.000 60.000
Oms 11.500 16.670
Pms 0.113 0.070
Oms 0.563 0.790
Rms 10.810 15.740
Sms 0.014 0.070
Sync.
H/V
H+V
INTERLACED
H +
V +
2.17 Set
the user switch before packing
A. POWER SELECTOR SW.
UL/CSA MODEL
HONG KONG/EUROPEAN (TUV)
B. CONTRAST VR
C. BRIGHTNESS VR
D. SIGNAL LEVEL SW.
E. SYNC. Sw.
F. MODE Sw.
86
MACII
35.000
28.570
2.100
3.200
21.500
2.100
67.000
15.000
0.086
1.120
13.700
0.086
G+Sync.
AC 115V
AC 230V
87
800X600
(56)
35.160
28.440
2.000
3.560
22.220
0.670
56.000
17.780
0.060
0.600
17.070
0.030
HjV
+
Fully clockwise (MAX.)
MID'POINT
0.7V
ON
OFF
= 2-9 =
88 89
1024x768 1280X1024
(60) (60)
48.370 64 .000
20.675 15.620
1.000 1.000
2.957 2.000
15.950 11.875
0.750 0.750
60.500 60.000
16.520 16.670
0.080 0.080
0.540 0.580
15.880 16.000
0.020 0.020
G+Sync. G+Sync.