DIAMOND DV172 Repair Manual

$7.99

DIAMOND DV172 - It's a complete service manual, and it's in PDF format. It contains circuit diagrams ( schemas ) etc. It also usually contains parts catalog. After placing order we'll send You download instructions on Your email address. See below for delivery information

The manual is available only in language(s): English

Link to manual will be sent on Your email address after You place order.

This product was added to our catalog on Wednesday 21 November, 2007.

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Click to see text excerpt from the manual

DV172 LCD Monitor Service Guide
Circuit Operation Theory

Fig. 4

(d) Rectifier and filter
D701 and C703 are to produce DC output. L701 and C704 are to suppress high Frequency switching
spikes. (See Fig.5)

Fig. 5
(e) PWM Controller
The current mode control IC UC3842B is used to control PWM. When the VCC terminal of it gets
16V, IC601 turns on. +5V will be set up at Pin8 through soft start circuit, which includes R617, C611,
D606 and D605. R616 and C610 generate a fixed frequency saw-tooth wave at Pin4.

5