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SERVICE MANUAL
COLOR MONITOR
S992 Series
P/N : S992X-3-01-A
Date : Jul-29-02
Version : A00
1. SPECIFICATIONS FOR 9Glr SERIES COLOR MONITOR
1. CRT : 46CM(19") 90 Deflection, 29mm Neck, flat 0.26mm Dot Pitch, Non-Glare Screen
2. Viewable image Size: 45.7CM (18") diagonal
3. Display Color: Unlimited Colors
4. External Controls:
Power On/Off, OSD key, Function knob: Contrast, Brightness, H-Size, H-Center, V-Size, V-Center, ZOOM,
Pincushion, Trapezoid, Pin-Balance, Parallelogram, Rotation, Moire Reduce, Recall, Degaussing, Color
Temperature, Volume. (For 9GlrA Model)
5. Input Video Signal
Mode 1 Mode 2 Mode 3 Mode 4
RGB Analog RGB Analog RGB Analog RGB Analog
Horiz. Sync: TTL Level TTL Level TTL Level TTL Level
Negative Negative Negative Positive
Vert. Sync: TTL Level TTL Level TTL Level TTL Level
Positive Negative Negative Positive
Horizontal: 720 (H) 640 (H) 640 (H) 800 (H)
Vertical : 400 (V) 480 (V) 480(V) 600(V)
Fh (kHz): 31.327 31.469 43.269 53.750
Fv (Hz) : 69.616 59.9 85.008 84.997
Mode 5 Mode 6 Mode 7 Mode 8
RGB Analog RGB Analog RGB Analog RGB Analog
Horiz. Sync: TTL Level TTL Level TTL Level TTL Level
Positive Positive Positive Positive
Vert. Sync: TTL Level TTL Level TTL Level TTL Level
Positive Positive Positive Positive
Horizontal: 1024 (H) 1280 (H) 1280 (H) 1600 (H)
Vertical : 768 (V) 960 (V) 1024 (V) 1200 (V)
Fh (kHz): 68.677 85.935 91.148 93.75
Fv (Hz) : 84.997 85 85 75
6. Display Size
Horizontal: 346 mm
Vertical: 260 mm
7. Scanning Frequencies
Horizontal: 30KHz ~ 98KHz
Vertical: 50 Hz ~ 160 Hz
8. Factory Preset Timings: 8
User Timings: 20
9. Mis-convergence
Center: 0.3 mm Max.
Corner: 0.4 mm Max.
10. Video Dot Rate: 200 MHz
2. PRECAUTIONS AND NOTICES
2-1 SAFETY PRECAUTIONS
1. Observe all caution and safety related notes located inside the display cabinet.
2. Operation of the display with the cover removed, may cause a serious shock hazard from the display power
supply. Work on the display should not be attempted by anyone who is not thoroughly familiar with
precautions necessary when working on high voltage equipment.
3. Do not install, remove or handle the picture tube in any manner unless shatter-proof goggles are worn.
People who are not so equipped should be kept away while handling picture tube. Keep picture tube away
from the body while handling.
4. The picture tube is constructed to limit X-RAY radiation to 0.5 mR/HR. For continued protection, use the
designated replacement tube only, and adjust the voltages so that the designated maximum rating at the
anode will not be exceeded.
5. Symbol "" means safety relative parts. The use of substitute replacement parts which do not have the
same characteristics as specified in the parts list may create shock, fire or explode etc.
6. Symbol " " means X-ray relative parts. Before replacing any of these components please read the parts list
in this manual carefully to avoid creating higher anode voltage or x-ray. Especially for sealed controls, such
as VR902, VR702 and FBT screen VR etc, which were sealed by the manufacturer once their optimum
position has been set, please don't dismantle them as your likes, otherwise you will break or damage the
component. If you need replace the parts with sealed control, please adjust the relative VR to make sure the
B+ voltage under 61.8Vdc at 640*480@60Hz and well seal it with A+B glue or equivalent, which you can
not move away with one screw driver.
7. Before returning a serviced display to the customer, a thorough safety test must be performed to verify that
the display is safe to operate without danger or shock. Always perform an AC leakage current check on the
exposed metallic parts of the cabinet, such as screw heads.
Test method for current leakage is described as follow.
(a) Plug the AC line cord directly into rated AC outlet (do not use a line isolation transformer during this
check).
(b) Use an AC voltmeter having 5000 ohms per volt or with more sensitivity in the following manner:
Connect a 1500 ohms 10 Watt resistor, paralleled by a 0.15UF, AC type capacitor between a known
good earth ground (water pipe, conduit, etc.) and the exposed metallic parts simultaneously. Measure
the AC voltage across the combination of 1500 ohms resistor and 0.15UF capacitor.
(c) Reverse the AC plug at the AC outlet and repeat AC voltage measurements for each exposed metallic
part.
(d) Voltage measured must not exceed 0.5 volts RMS. This corresponds to 0.35 milliamp AC. Any value
exceeding this limit constitutes a potential shock hazard and must be corrected immediately.
2-2 PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety visual inspections and the protection
afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage,
wattage, etc. Before replacing any of these components read the parts list in this manual carefully. The use of
substitute replacement parts which do not have the same safety characteristics as specified in the parts list may
create shock, fire, X-RAY radiation or other hazards.
2-3 SERVICE NOTES
1. When replacing parts or circuit boards, clamp the lead wires around terminals before soldering.
2. When replacing a high wattage resistor (more than 1/2W of metal oxide film resistor) in circuit board, keep
the resistor about 10mm (1/2 in) away from circuit board.
3. Keep wires away from high voltage or high temperature components.
4. Keep wires in their original position so as to reduce interference.
3. OPERATING INSTRUCTIONS
This procedure gives you instructions for installing and using the 9G color display.
1. Position the display on the desired operation and plug the power cord into a convenient AC outlet. Three-
wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and
cabinet to the electrical conduit ground. If the AC outlet in your location does not have provisions for the
grounded type plug, the installer should attach the proper adapter to ensure a safe ground potential.
2. Connect the 15-pin color display shielded signal cable to your signal system device and lock both screws
on the connector to ensure firm grounding. The connector information is as follow:
1 5
6
10
11 15
15 - Pin Color Display Signal Cable
PIN NO. DESCRIPTION PIN NO. DESCRIPTION
1. RED 9. NC
2. GREEN 10. GND
3. BLUE 11. SYNC. GND
4. GND 12. SDA
5. GND 13. HORIZ. SYNC
6. GND-R 14. VERT. SYNC (VCLK)
7. GND-G 15. SCL
8. GND-B
3. Apply power to the display by turning the power switch to the "ON" position and allow about thirty
seconds for display tube warm-up. The Power-On indicator lights when the display is on.
4. With proper signals feed to the display, a pattern or data should appear on the screen, adjust the brightness
and contrast to the most pleasing display.
5. This monitor has power saving function following the VESA DPMS. Be sure to connect the signal cable to
the PC.
6. If your 9G Series color display requires service, it must be returned with the power cord.
4. ADJUSTMENT
4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS
1. Approximately 30 minutes should be allowed for warm up before proceeding.
2. Adjustments should be undertaken only on those necessary elements since most of them have been carefully
preset at the factory.
4-2 MAIN ADJUSTMENTS
NO. FUNCTION LOCATION DESIGNATION
1. B + ADJ PCB - MAIN VR902
2. SCREEN ADJ FLY BACK TRANS T402
3. FOCUS ADJ FLY BACK TRANS T402
4. ABL ADJ PCB - MAIN VR701
5. SUB-BRIGHTNESS ADJ PCB - MAIN VR702
4-3 ADJUSTMENT METHOD
1. B + & HV voltage adjustment and hold down circuit confirmation:
A. Chrome-2000 Signal generator or PC equivalent set mode 2, VGA 640X680@60Hz pattern 1 .
B. Connect a DC Volt meter between TP902 or D925 cathode and ground, then adjust VR902 to be
61.8VDC(B+).
C. Connect a DC Volt meter between TP701(G1) and ground, Brightness set to max. Then adjust VR702 to
be -40 VDC.
D. Connect a 22k resistor in parallel with R419 to increase the HV, the hold down circuit will operate and
the display will disappear. Then disconnect this resistor to bring the unit to normal condition.
2. Factory preset Timings Adjustment:
A. Press MENU Key to show OSD window press Up or Down Key to switch the functional controls.
B. Press the Up Key to select the "ZOOM" function, then press the MENU Key. While do not release the
MENU Key until the OSD window changed to the Factory preset window.
C. The Factory preset window contains the following functional controls. Select one of the control by press
the MENU key. Then press the Up/Down Key to adjust it's value for the optimum picture.
MENU Key to Quit the OSD window. Mean while the new setting data will be saved in the memory.
E. To switches the input signal to the other Timing Mode. Please follow step C ~ D to get the optimum picture.
F. Select the " " RETURN function and press the MENU Key, then the Factor Preset window will be
returned to the original OSD window.(user's operating condition)
G. The setting data of the CONTRAST, BRIGHTNESS, PIN-BALANCE, PARALLELOGRAM,
ROTATION, COLOR TEMPERATURE are common mode saved in the memory. Don't needed adjust it
individual at every timing Mode and save in the memory.
H Model select: for factory only, service engineer can't changed.
FACTORY PRESET
H: 68.8KHz
H: 36.51kHz V: 85Hz
V: 51.34Hz
Vs
HS Vc
HP TC
BC
9300 6500
Tm BI
080
70
CONTRAST H-MOIRE REDUCE
BRIGHTNESS V-MOIRE REDUCE
H-CENTER R-GAIN
H-SIZE G-GAIN
V-CENTER B-GAIN
V-SIZE R-BIAS
ZOOM G-BIAS
TOP COMER R-BIAS
TC
BOTTOM COMER 9300 COLOR TEMPERATURE
BC
PINCUSHION 6500 COLOR TEMPERATURE
TRAPEZOID DEGAUSS
PIN-BALANCE OSD EXIT
PARALLELOGRAM RETURN
ROTATION Vs LINEAR
SUB-H-SIZE Vc LINEAR
HS
H-SIZE-PHASE B/I ON/OFF
HP BI
Used time
Tm
3. White Balance, Luminance adjustment:
A. Bias (Low Luminance) adjustment:
(a) Set mode 5 1024 x 768 Fh: 68.7KHz full white pattern.
(b) To make the adjustment condition is under the Factory preset window.
Same as step 2-C.
(c) Warm up more than 30 minutes.
(d) Brightness set to maximum. Contrast set to max. full white pattern, then adjust FBT screen
VR to make Y= 4.0