11
RELATIVE PLACEMENT OF TYPICAL COMPONENTS
Purity Magnets
Deflection Yoke
4-pole Convergence Magnets
6-pole Convergence Magnets
6. Convergence adjustment
A. Produce a magenta crosshatch on the display.
B. Adjust the focus for the best overall focus on the display.
Also adjust the brightness to the desired condition.
C. Vertical red and blue lines are converged by varying the angle between the two tabs of the 4 pole magnets on the
PCM assembly. (See above diagrams)
D. Horizontal red and blue lines are converged by varying the two tabs together, keeping the angle between them
constant.
E. Produce a white crosshatch pattern on the display.
F. Vertical green and magenta lines are converged by varying the angle between the two tabs of the 6-pole magnets.
G. Horizontal green and magenta lines are converged by varying the two tabs together, keeping the angle between
them constant.
5. CIRCUIT DESCRIPTION
5-1 MICRO
CONTROLLER CIRCUIT
MICRO Controller
The IC101 contains a 6502 8-bit CPU core, 256 bytes of RAM, 16K bytes of ROM,14 channel 8 bit PWM D/A
converters, 2 channel A/D converters for key detection, one 8 bit pre-loadable base timer, internal H-sync and V-sync
signals processor providing mode detection, watch- dog timer preventing system from abnormal operation, and an I
2
C bus
interface.
H/V sync signals processor
The functions of the sync processor include polarity detection, H-SYNC & V-SYNC signals counting, Programmable
SYNC signals output, free running signal generator,and composite sync separation Pin41/Pin42 are for the H-SYNC and
V-SYNC input, Pin33/Pin34 will output the same signal as input sync signal without delay, and the polarity are setting in
the positive. When no signal input, the Pin33 will output a 61HZ V-SYNC free run signal. The Pin34 will output a
62.5KHz H-SYNC free run signal. for the monitor testing use.
Содержание AF715 Series
Страница 1: ...SERVICE GUIDE COLOR MONITOR AF715 Series 41AB793Z ACER A00 P N B793Z 01 A Date Mar 18 03 Ver A00 ...
Страница 23: ...22 7 MECHANICAL OF CABINET FRONT DIS ASSEMBLY ...
Страница 45: ...44 10 IC BLOCK DIAGRAM IC201 IC701 IC906 LM358 IC101 NT6861 ...
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Страница 49: ...48 IC802 NT6828 IC801 TDA4887 ...