Service manual

5. CIRCUIT-DESCRIPTION

5-1 SPECIAL FUNCTION with PRESS-KEY

Press MENU key and Right key, at POWER-ON: set to FACTORY-mode, when we want to adjust white-

balance with rs232-port.

Press POWER-key off-on : CANCEL above function(quit from factory mode) and set to user-mode.

Press MENU key 10seconds : Enable/ Disable OSD-LOCK function

OSD-INDEX EXPLANATION

1. CABLE NOT CONNECTED :Check video cable.

2. INPUT NOT SUPPORT :

a. INPUT frequency out of range : H > 61kHz, v > 75Hz or H < 30kHz, v < 56Hz

b. INPUT frequency out of VESA-spec. (out of tolerance too far)

3. UNSUPPORT mode, try different Video-card Setting :

Input frequency out of tolerance, but still can catch-up by our system (if this message show, that means,

this is new-user mode, AUTO-CONFIG will disable)

5-2 SIMPLE-INTRODUCTION about TFT5017/FP5017 chipset

1. GM2115 (Genesis all-in-one solution for ADC, OSD,MCU,TCON,scalar and interpolation) :

USE for computer graphics images to convert analog RGB data to digital data for interpolation process,

zooming, OSD font & overlay and generate drive-timing for LCD-PANEL,

2. W49F002 (Winbond flash memory, with 64k Rom-size) :

Use for store firmware, the firmware include calculate frequency, pixel-dot , detect change mode, rs232-

communication, power-consumption control, OSD-index warning…etc.

3. M24C02 (MicroChip IC) :

EePROM type, 1K ROM-SIZE, for saving DDC-CONTENT.

4. M24C16 (MicroChip IC) :

EePROM type, 4K ROM-SIZE, for saving AUTO-config data, White-balance data, and Power-key status,

backliaht on-counter data and power up –counter data.

5. BA9741F (swintching regulator 12V to 5V and 12V to 3.3V) :

6. RT9164-25CG (RICH TEK brand regulator 5V to 2.5V)

MODULE-TPYE COMPONENT :

1. ADAPTER : CONVERSION-module to convert AC 90V-265V to 12VDC, with 3.33 AMP

2. INVERTER : CONVERSION-module to convert DC 12V to High-Voltage around 1600V, with frequency

30K-50Khz, 7mA-10mA