Interface Circuit; Video Circuit; Digital Control Circuit - NEC MultiSync 3D JC-1404HME Service Manual

(1-4) Interface Circuit (SUB UNIT PWE-250)
It has the following three functions:
a) VIDEO Interface to the Video circuit
b) SYNC Interface for the Deflection circuit and the Digital control circuit
c) Digital Interface for the Digital control circuit
The sub unit sends an identification signal to the digital control circuit as to the type of PC or video
graphics card to which the monitor is currently interfaced with.
(1-5) Video Circuit
The video signal sent by the Interface circuit is amplified by this circuit and supplied to the cathode
of the CRT.
(1-6) Digital Control Circuit
The digital control circuit has the following functions: For a more detailed information please refer
to the circuit description (2-5).
a) Automatic synchronization iAutomatic signal identification
b) Management of the displaying proper picture Automatic sizing
c) Management of user controls Automatic centering
d) Management of factory adjustment Management of picture data
The following outputs are produced by the D/A (Digital to Analog) Converter (µPD6336C).
e) H-FN converter output
f) V-FN converter output
g) Horizontal size control output
h) Horizontal position control output
i) Vertical size control output
j) Vertical position control output
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