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Summary of Contents for Tatung VM9AF
- Page 1 VM-9AF SERVICE MANUAL...
- Page 2 CONTENTS SPECIFICATION OPERATING INSTRUCTIONS IMPORTANT SAFEGUARDS ADJUSTMENT PROCEDURE BLOCK DIAGRAM SERVICE NOTES CIRCUIT DIAGRAM LAYOUT DIAGRAM EXPLODED DRAWING 10 PARTS LIST...
- Page 3 SPECIFICATION 9” Mono Chrome Monitor CRT SIZE 10” 90 DEGREES, 20 O PHOSPHOR FACEPLATE SILICA NON-GLARE SCAN FREQ. HOR. 31, 5KHZ, 35.5KHZ, 38KHZ VERT. 50-90HZ RESOLUTION 640X480, 800X600, 1024X768 BANDWIDTH 26MHZ, 35MHZ, 45MHZ VIDEO SIGNAL R.G.B. INPUT, 1V p.p. MAX. SYNC INPUT TYPE H-SYNC, V-SYNC TTL INPUT CONNECTOR :...
- Page 4 OPERATING INSTRUCTIONS POWER SWITCH Power on/off switch is a push button. To turn on the power of the unit, press this switch. To turn off the unit, press it again. POWER-ON INDICATOR The power-on indicator when the power is turned on. BRIGHTNESS CONTROL Turn the brightness control clock-wise to increase the brightness and counter clock-wise to decrease it.
- Page 5 IMPORTANT SAFEGUARDS For your own safety, read all of these instructions and save them for later reference. POWER PLUG This display monitor is equipped with a 3-wire grounding type power plug. The third pin provides a safety ground for the display frame and will fit only into the power outlet of compatible configuration.
- Page 6 CLEANING Unplug the power cord from the outlet before cleaning the display. Use only a damp cloth and mild detergent. Do not use strong liquid cleaner or aerosol sprays. Do not attempt to clean the interior of the unit: this action must be performed by the service technician as required during normal maintenance.
- Page 7 ADJUSTMENT PROCEDURE This alignment procedure is for adjusting/testing picture performance. In order to obtain the optimum result the following adjustment sequence must be followed step by step: Check B+ voltage: test pattern: cross hatch set up external brightness and contrast VR to central position make sure 28Vdc±0.1Vdc use digital multimeter positive leader test D909 negative point, negative leader to ground.
- Page 8 Vertical height adjustment test pattern: cross hatch set up external brightness and contrast VR to central position. Adjust VR302 to make height to 120±4 mm. Vertical-hold (Free-run 52Hz) adjustment: disconnect video signal use frequency counter ⊕ leader, measure vertical yoke point, adjustment VR303 make frequency value to 52Hz.
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