Deflection Circuit; Horizontal Drive Circuit - Sony KV-32HS500 Training Manual

Chapter 6 - DA-4 & DA-4X Chassis Deflection Circuits
DA-4 Horizontal Deflection Circuit
B BOARD
IC2801
Y/C
JUNGLE
18 18
4
H-
DR.
CN2804
A BOARD
FROM
T5001/
1
+
PIN 8
-
(REF)
2
FROM
CN5001/
L5003
PIN 6
(HC_PARA)
D BOARD
Q5031
S-CORR C5064
FROM
CN5001/
PIN 10
(MP_PARA)

Horizontal Drive Circuit

(Reference Figure 6-1)
This circuit is split between an oscillator on the B-board and an output stage on the D-board. The 33.75KHz
horizontal oscillator is in the Y/C Jungle IC2801. IC2801/pin 4 outputs a 3Vpp rectangular waveform (H-DRV).
On the D-board, the H-DRV waveform is amplified through Q5035 and Q5036, and then applied to buffer Q5027.
The MOSFET driver Q5028 and the output transistor Q5030 amplify the signal to provide sufficient current to
drive the HOT T5001 and the H-DY deflection yoke.
At the output stage, the HOT T5001 has a secondary winding that provides filament voltage, and also +/-15V for
the vertical driver IC5004 and the horizontal centering circuit IC5005.
The waveforms shown on Figure 6-1 are the typical horizontal circuit signal shapes. The difference between this
set and a conventional set is the horizontal frequency, which is 33.75KHz as opposed to 15.75KHz scan rate in
the conventional set. The 33.75Khz scan rate is considered a high definition horizontal scan rate.
R5150
CN508 CN5009
C5070
2 2
CN510
2.9Vp-p
IC5005
1kVp-p
H-CENT.
4
95V
5
2
+
H-DY
-
R5148
C5066
+135V
FIGURE 6-1 - DA-4 HORIZONTAL DEFLECTION CIRCUIT
R5151
Q5026
R5126
C5071
Q5036
Q5035
Q5027
Q5030
H-OUT
HOT
T5001
6
4
D5003
Q5003
IC5002
+
7
-
33.75kHz
11Vp-p
10Vp-p FROM Q5006
51
6. DA-4 & DA-4X Deflection Circuits
152Vp-p
9V
12Vp-p
7
R5129
Q5028
6
R5130
+135V
1
HEATER (TO IC5005)
2
-5V (TO IC5005
7
CENTERING)
C5041
+
8
REFERENCE
C5040
+
9 +5V (TO IC5005)
+15V
10
-15V
11
FROM CN5001/PIN 10
EW_PARA
12
IC5001
-
5
7
+
6
C5030
1Vp-p
HDT T5002
4
1
TO IC4004
VERTICAL OUT
6
5 H-OUT
FEEDBACK
FROM T5001
C3P15-6-1 1527 11/11/02