Hitachi 51SWX20B Training page 78

DP-2X SWEEP LOSS DETECTION CIRCUIT
SW+9V
Vertical Blanking
From Pin 11 I601
RN13
V. Blk.
CN04
RN14
24V P/P
CN02 RN03
Horizontal Blanking
From Q706 Emitter
H. Blk.
CN01 RN04
11.6V P/P
PPS2 PPD2
4
SPOT
To Q442
Signal
3of 3
See A/V
MUTE
Circuit
5
CUT OFF
From I001
Micro
Pin 47
DN13
RN12 RN11
DN08
QN05
CN03
RN02
DN03
DN02
QN01
DN01
RN05 RN01
Prevents CRT Burn
4
DN12
RN17
5
When Vertical Drive
is turned Off during
adjustment, I
QN04
DN06
DN07
RN08
RN10
QN03
DN11
2
C.
RN09
From Power
Supply Circuit
Diagram
SW+7V
DN14
RN18
QN02
RN06
RN15 DN09
H. Blk
RH07
DN10
RN16
DN04
QN06
Spot Inhibit
High Voltage
Driver IC
IH01
Stops
14
Drive
Stops
3
Osc
Stops High Voltage
Drive Signals From
being produced
when Sweep Loss is
detected.
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