Toshiba MM20E45 - Page 44

7-11
12V
RH62
22K
RH61
22K
QH42
RN1202
RH60
6.8K
RH65
10K
CH22
16V
330µ
CH23
150P
CH21
M0.1
CH20
M0.0033
RH87
100
RH99
330K
CH76
M0.01
M0.015
CH19
TEM2009
CH18
M0.1
LH10
RH56
1K
Y
RK91
15K
RH57
12K
30 29 28 27 26 25 24 23
22 21 20 19 18 17 16
V.Ref
V.OUT
H.LOCK
V.OSC
RAMP.0
1st delay
2nd delay
V/I
AFC
SAW
H.OSC
M.M
H.REG
H.OUT
COMP
89
10 11 12 13 14 15
7654321
RH59
3.9K
RK38
18K
RK36
3.3K
H.D
QK07
2SC752-Yoro
G
RH66
12K
RH67
22K
CH24
M0.01
H.SYNC
RK50
10K
CK25
M0.0056
H
RH68
33K
RH69 10K
CH25
16V 10µ
RH70
10K
CH27
M0.01
RH71
22K
CH26
T560
RH72
22K
RH73
10
CH30
50V
10µ
RH74
100
RH77
1/4W
2.7KF
RK66
1/4W
3.6KF
RH25
5KB
CH31
M0.039
CH32
50V
2.2µ
RH78
2.2K
CH33
T2700
CH73
50V
2.2µ
CH35
M0.1
CH34
M0.001
RH34
1/4W1KF
RH80
18K
RH81
39K
CH37
50V
10µ
CH36
16V
330µ
RH79
1.5K
RH3
6
1/4W
750F
NTSC fH ADJ.
RH35 5008
QH15
RN1203
2
1
3
QK13
2SC1815Y
or 2SC1740S,Q
VFV
RH82 2R47
RGB fH ADJ.
1
2
3
V.BLK
CH17
50V
1µ
ICH08
LA7860
H.V.OSC
VHP(0~5V)
AFC
Fig. 32
2-4 Other Circumference Circuit
QH15 changes the duty ratio of hor output pulse (that is; hor
drive pulse) of ICH08 so that the base current of hor output
transistor becomes respectively optimum in both high
frequency mode and low frequency mode (including TV
mode). Since for the signal which drives QH15, the output of
frequency discriminating circuit as mentioned above is used,
duty ratio changes around 28kHz. In passing, when frequency
is low, ratio of period of high level in output pulse at pin 16
is extended.
Driving pulse of control IC IC302 (TA8859AP) in Ver
deflection circuit is supplied by inverted pulse at pin 24 of
ICH08.
The pulse at pin 25 is used as blanking pulse in Video circuit.