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Download Service Manual - TT
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5790A Service Manual VOLTAGE SELECT SWITCHES IEEE RS232 A21 REAR PANEL PCA A18 FILTER PCA A17 REGULATOR/GUARD CROSSING PCA A16 DAC PCA A10 TRANSFER PCA A6 WIDEBAND PCA A20 CPU PCA A19 DIGITAL POWER SUPPLY PCA A22 POWER TRANSFORMER A15 A/D AMPLIFIER PCA A4 DIGITAL MOTHER BOARD PCA A2 FRONT PANEL PCA A1 KEYBOARD ASSEMBLY FRONT elu053.eps Figure 4-5. Analog and Digital Assemblies 4-19. Clearing Ghost Images from the Control Display After prolonged periods of displaying the same message on the Control Display, you may notice a non-uniform brightness of pixels across the display. This phenomenon can be cleared up by lighting up the whole display and leaving it on overnight (or at least several hours). Proceed as follows to burn in the Control Display: 1. Turn on the 5790A and press the "Setup Menus" softkey. 2. Press [UTIL MENUS] followed by the "Diags" softkey. 3. Press the "Front Panel Tests" softkey. 4. Under the "Display" label, press the "Control" softkey. 4-10
