Compaq P1220 Service Manual download pdf (Page 38)

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(4) Block diagram

Fig. 20 shows the block diagram of the DDCC circuit.

The components 4H_DC(pin 6), 4H_SC(pin 61), 4V_DC(pin 8) and 4V_SC(pin 60) supplied

from IC601(CP267P151=uPD61882BGC) to 4H-Coil and 4V-Coil are output, the dynamic

component (4H_DC, 4V_DC) is amplified with IC6A1(TL084), and the static component

(4H_SC, 4V_SC) is amplified with IC6A2(KIA4558).

DCC(pin 7) output from IC601 (CP267P151=uPD61882BGC) and DEFL_+3.3V(pin 3)

output from IC602 (TA48M033F) are respectively the reference voltage of Op-

Amp(IC6A1:TL084) that amplifies the above dynamic component (4H_DC, 4V_DC) and the

reference voltage of Op-Amp(IC6A2:KIA4558) that amplifies the static component (4H_SC,

4V_SC).

On each of 4H and 4V, the waveform added with the dynamic component and static com-

ponent is input to IC8A1 pin 3 and pin 4 (STK391-110) allow the specified current to flow to

each convergence compensation coil.

Table 5

b11T

b21L

b31TL

b41TL

c11T

c21L

c31TL

c41TL

YHTT

XHL

S3HTL

PQHTL

YVTT

XVL

S3VTL

PQVTL

y^2

x^2

x^2・-(y^3+y^4+y^5+y^6)

x^2・y^4

y^2

x^2

x^2・-(y^3+y^4+y^5+y^6)

x^2・y^4

b11B

b21R

b31TR

b41TR

c11B

c21R

c31TR

c41TR

YHTB

XHR

S3HTR

PQHTR

YVTB

XVR

S3VTR

PQVTR

y^2

x^2

x^2・-(-y^3+y^4+y^5+y^6)

x^2・y^4

y^2

x^2

x^2・-(-y^3+y^4+y^5+y^6)

x^2・y^4

b12T

b31BL

b41BL

c12T

c31BL

c41BL

YHJT

S3HBL

PQHBL

YVJT

S3VBL

PQVBL



x^2・-(-y^3+y^4-y^5+y^6)

x^2・y^4

x^2・-(-y^3+y^4-y^5+y^6)

x^2・y^4

b12B

b31BR

b41BR

c12B

c31BR

c41BR

YHJB

S3HBR

PQHBR

YVJB

S3VBR

PQVBR



x^2・-(-y^3+y^4-y^5+y^6)

x^2・y^4

x^2・-(-y^3+y^4-y^5+y^6)

x^2・y^4

Coil

a11

a12

4H Coil

4V Coil

H-CONVERGENCE

V-CONVERGENCE

＜Factory mode＞

＜User & Factory mode＞

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Compaq P1220 Service Manual Page 38

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