Size Circuit - NEC MultiSync 3D JC-1404HME Service Manual

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(Fig. 2-5-11) Voltage Waveform
(2-5-5) H. Size Circuit
IC152
µPD6336C
0/A
J.
V. ref
12V
R591
331/2W
R510
2SA952
H.SYNC
SAW TOOTH OSC.
OUTPUT
COMPARATOR #2 OUTPUT
COMPARATOR #1 OUTPUT
H. PHASE OUTPUT
(TRIG. signal for the H. OSC.)
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1
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H.OUT
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(Fig. 2-5-12) BLOCK DIAGRAM of the SIZE CIRCUIT
The H. size control voltage (I Cl 54 pin 7) controls the DC bias level of 0510 and the primary
current of T504. The primary current of T504 controls the secondary coil induction value. So, the
H. size signal modulates the Horizontal D.Y current, i.e. the H. size of the raster.
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