6
Block diagram
14
L7.3A
7542
3548
2541
6542
6543
3543
3544
+8V
2542
5545
5
4
3
2
5
4
12
16
10
+13V
+8V
6560
18
14
13
A1
14
3
2
DC
AC
2508
SK 1
1500
5500
6502/05
T 5 AH
MAINS SUPPLY
6540
2540
3577
2561
STANDBY
220V˜
5574
3585
3575
V BATT
ADJUST
140V
9V
3
2
7
3518
8
1
3528
7520
OSC
B UFFER
4
7520
MC44603AP
P1
P3
P4
P11
P9
P8
!
!
!
!
!
3525
7541
TDA8139
9
8
2
4
+5V
3
RESET
(A5 - 19)
(A5 - 26)
6550
2551
P10
140V VBATT
6590
6570
2571
+10V / 14V
CRT
DISCHARGE
(A4 - 38)
7518
STH8NA60F
5551
+140V VBATT
2563
2562
P12
P15
P13
P14
0V6 STB
*
CRT DISCHARGE CIRCUIT
*
1
1
2
9
8
3574
1
8.6532010_008.eps
090398
A2
LINE DRIVE
Vbatt
A3
SYNC-FRAME
& VERT. DRIVE
+8V
A4
VIDEO
PROCESSING
CRT DISCHARGING
A5
CONTROL
A6
SOUND
PROCESSING
+8V
A7
SOUND
AMPLIFIER
+13V
C
NICAM PANEL
+5VD
RESET
STAND-BY
Vbatt
5201
5203
+8V
+8V
+8VB
+8VA
+5V
+8V
5300
+8VD
+14V
+8V
5203
5205
5204
+8VA
+5VA
+5VB
5573
7470
5445
6486
6488
2486
2484
5480
40
1
3
10
9
FOCUS
G2
EHT INFO
+11V LOT
+5V LOT
HEATER
X-RAY
PROTECTION
29" ONLY
-11V LOT
+48V LOT
+11V LOT
HFB( A5 - 21)
7225 - D
HOR
DRIVE
E/W
DRIVE
TDA8374C/
N337
45
A 2
LINE DRIVE
7460
BU1508DX
2457
5470
2471
3471
3470
+11V LOT
(FROM A3 - 43)
5457
EW DRIVE
EW CONNECTION
6466
6465
5463
7461
G
16kHz
3430
+8V
HOR.
DEFECTION
7
8
6
2469
3448
3449
6485
3485
5
11
12
6480
6481
+200 TO
CRT PANEL
6490
2489
6449
6450
6463
3466
6464
6467
3467
L 1
L 4
L 8
L 10
6487
5487
3488
PROTECTION
(A5 - 12)
L 11
L 7
L 9
+140V
VBATT
+140V
VBATT
!
!
PROTECTION
E/W
3479
(A2-2)
6470
L 3
8.6532010_007.eps
090398
B
A4
CRT PANEL
VIDEO
PROCESSING
A5
CONTROL
A2
LINE DRIVE
A3
SYNC-FRAME
& VERT. DRIVE
A8
BTSC
DECODING
+200V
ANODE CRT
FOCUS
VG2
HEATER
+5V_LOT
+5V_LOT
HFB
PROT.
+11V_LOT
+11V_LOT
+ 48V (29")
-11V_LOT
+11V_LOT
X-RAY PROT.
+11V_LOT
5003
EHT
+VB
A4
0.5V / div AC
0.1ms / div
A5
0.5V / div AC
0.2ms / div
A6
5V / div DC
10ms / div
A
A7
50mV / div AC
0.2ms / div
A8
50mV / div AC
0.2ms / div
A9
50mV / div AC
0.1ms / div
A19
50mV / div AC
0.2ms / div
A21
50mV / div AC
0.1ms / div
A18 1.2V DC
A18 0V DC
A20 14.8V DC
C2
1V / div DC
0.1ms / div
C3
1V / div DC
0.1ms / div
C4
1V/ div DC
5ms / div
A
A
A
C1 5.0V DC
F1
0.5mV / div DC
5ms / div
F2
0.5mV / div DC
5ms / div
F3
10V / div DC
5ms / div
F4
10V / div DC
5ms / div
I1
500mV / div AC
10
µ
s / div
I3 1.6V DC
I3 4.0V DC
I4 5.0V DC
I5 0.5 - 30V DC
I7
50mV / div AC
500ms / div
L8 5.0V DC
L10 194V DC
L9 -11.7V DC
L2
2V / div DC
20
µ
s / div
100V / div DC
20
µ
s / div
L1
L3
200mV / div DC
10
µ
s / div
L6
5V / div DC
5ms / div
P2
5V / div DC
5ms / div
P1 270V DC
P1 270V DC
N2 4.2V DC
N1 4.1V DC
N3 0.2ms AC
P11 14V DC
P11 14V DC
P13 10V8 DC
P13 10V2 DC
P14 8V1 DC
P14 0V6 DC
P15 5V DC
P15 5V DC
P3
0.2V / div DC
5
µ
s / div
P3
0.1V / div DC
5
µ
s / div
P4
2V / div DC
5
µ
s / div
P4
2V / div DC
5
µ
s / div
P6
1V / div DC
5
µ
s / div
P6
1V / div DC
10
µ
s / div
P5 13V DC
P5 11.5V DC
5V / div DC
5ms / div
P2
P9 2V DC
P10 120V DC
P10 120V DC
S1
2V / div DC
20
µ
s / div
V13
500mV / div AC
10
µ
s / div
V12
200mV / div AC
10
µ
s / div
V1
500mV / div DC
10
µ
s / div
V2
1V / div DC
10
µ
s / div
V3
500mV / div DC
10
µ
s / div
V4
500mV / div DC
10
µ
s / div
V11
200mV / div AC
10
µ
s / div
V14
500mV / div AC
10
µ
s / div
V15
500mV / div AC
10
µ
s / div
V15a
500mV / div AC
10
µ
s / div
V15b
500mV / div AC
10
µ
s / div
V15c
500mV / div AC
10
µ
s / div
V16a
20V / div DC
10
µ
s / div
V16b
20V / div DC
10
µ
s / div
V16c
20V / div DC
10
µ
s / div
CL 86532018_010.AI
020498
C5 3V tt 12 MHz
C6 5V tt 12 MHz