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 I2C 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. 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.
