Digital Convergence - Sony CPD-G400 Training Manual

Digital Convergence

Circuitry
Using data stored in the EEProm memory IC1005, DPU IC1701 manu-
factures the static and dynamic convergence signals. All of the memory
data is transferred to the CPU at power ON. The CPU then sends the
data to pertinent ICs. The convergence data is sent to IC801.
The static convergence signals created by IC801 affect the center of the
picture. The two convergence signals XSC and YSC are amplified by
IC701 and applied to convergence coils that affect the beams in the X and
Y-axis respectively.
The dynamic convergence signals are also made by IC801, but they af-
fect the convergence along the perimeter of the screen. These complex
signals from IC801 (XDC and YDC) are amplified by IC702 and applied to
convergence coils 1 and 2.
Static Convergence Signals from DPU IC801*
Location DC AC - Vert
CN1005/pin 2 1.57V 0.2Vp-p
CN1005/pin 3 1.43 0Vp-p
CN1005/pin 4 1.65 0.2Vp-p
Dynamic Convergence Signals from DPU IC801*
Location DC AC - Vert
CN1005/pin 5 1.69 0Vp-p
CN1005/pin 6 1.65 0Vp-p
CN1005/pin 7 1.61 0.5Vp-p
* All voltages and wave shapes taken in the Aging Mode.
AC - Horiz Wave Shape
0.8Vp-p
1Vp-p
0.8Vp-p
AC - Horiz Wave Shape
1Vp-p Complex
1Vp-p complex
2Vp-p complex
65
Convergence Output Waveform:
1
T
2
3
4
Scope Name
Channel 1 Static Conv. Yoke 4
Channel 2 Static Conv. Yoke 3
Channel 3 Dynamic Conv. Yoke 2
Channel 4 Dynamic Conv. Yoke 1
V
Time base
* All voltages and wave shapes taken in the Aging Mode.
V
Alignment
The Digital Convergence data stored in memory IC1005 (not shown) is
changed during convergence using DAS software. During this alignment,
an on-screen grid is displayed. A cursor identifies a point on the grid to be
converged. At that point each color can be moved to converge all three
colors, producing a white grid. The cursor is then moved to the next
alignment location.
Convergence Output Signals
Location
IC701/pin 1
IC701/pin 9
IC702/pin 6
IC702/pin 1
2msec/div
Voltage/div
2.2Vp-p
0.5Vp-p
2Vp-p
2.5Vp-p