User manual MEMOREX DT1900-PSM

[. . . ] DT1900-P-A SERVICE MANUAL COLOR TELEVISION RECEIVER ORIGINAL MFR'S VERSION A Design and specifications are subject to change without notice. SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES As for the places which need special attentions, they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notices in the operation manual. 6. AVOID AN X-RAY Safety is secured against an X-ray by considering about the cathode-ray tube and the high voltage peripheral circuit, etc. [. . . ] Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment). (-) MIN 9 CONFIRMATION OF HOURS USED POWER ON total hours can be checked on the screen. NOTE: If you set factory initialization, the total hours is reset to "0". DOWN button on the set and Channel button (6) on the remote control for more than 1 second. After the confirmation of using hours, turn off the power. ADDRESS DATA INIT 00 00 Initial setting content of MEMORY IC. POWER ON total hours. = (16 x 16 x 16 x thousands digit value) + (16 x 16 x hundreds digit value) + (16 x tens digit value) + (ones digit value) CRT ON 0010 FIG. 1 WHEN REPLACING EEPROM (MEMORY) IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. INI 00 10 +0 00 02 +1 60 +2 99 +3 93 +4 1B +5 B3 +6 24 +7 3B +8 09 +9 00 +A 0A +B 05 +C 00 +D A8 +E 00 +F 08 Table 1 1. While holding down VOLUME button on front cabinet, press key 6 on remote control for more than 1 second. +/- button on the remote, step through the ADDRESS until required ADDRESS to be changed is reached. Pressing ENTER will take you back to ADDRESS for further selection if necessary. When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input. While holding down VOLUME button on front cabinet, press key 1 on remote control for more than 1 second. After the finishing of the initializing of shipping, the unit will turn off automatically. BEFORE MAKING ELECTRICAL ADJUSTMENTS Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies. CAUTION · Use an isolation transformer when performing any service on this chassis. · Before removing the anode cap, discharge electricity because it contains high voltage. · When removing a PCB or related component, after unfastening or changing a wire, be sure to put the wire back in its original position. · When you exchange IC and Transistor with a heat sink, apply silicon grease (YG6260M) on the contract section of the heat sink, Before applying new silicon grease, remove all the old silicon grease. (Old grease may cause damages to the IC and Transistor. ) Prepare the following measurement tools for electrical adjustments. DOWN button on the set and the Channel button (9) on the remote control for more than 1 second to appear the adjustment mode on the screen as shown in Fig. 1-1 and press the channel button (03) on the remote control to select "V. UP/DOWN button on the remote control until the digital voltmeter is 2. 5V. [. . . ] Adjust the slant of the deflection yoke while watching the screen, then tighten the fixing screw. DEFLECTION YOKE DEFLECTION YOKE SCREW MAGNET SCREW 3-3: STATIC CONVERGENCE NOTE Adjust after performing adjustments in section 3-2. Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets. Combine red/blue (magenta) and green by adjusting the pair of 6 pole magnets. [. . . ]