HEWLETT-PACKARD F1723 Repair Manual

$7.99

HEWLETT-PACKARD F1723 - 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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matt wilschke - 03/07/2008

Essential for popping the top open and cleaning and replacing what needs repalced. One note: the Ornamental Panel is attached with some adhesive as well as screws and faders so don't be shy about prying it open.

Fabian Castle - 08/01/2006

Thanks for the excellent service. The manual arrived quickly and in excellent condition. Quality A+++!

Mark Tarkett -

Excellent service, good price, products are excellent. Will do business with this vendor again.

Jeff Lewis - 07/24/2006

Received the Hitachi user manual. Happy happy happy! Thanks again.

HIROSHI EMOTO - 11/29/2007

Very fast service and a good documents. Thank you.

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f1723 / FP7317 / L1702 / vf17 / FP17
2
6. EPROM (Circuit diagram MAIN PWB 4/5)
Data transfer between I307 (24LC16) and Scaller IC I304 is effected through the IIC bus SCL (pin 37) and SDA (pin
36) of I304. The data to be transferred to each device are stored in I307.
l I304 control data.
l OSD related setting data.
l Other control data for service menu.
7. Controller circuit (Circuit diagram MAIN PWB 4/5)
Scaller IC I304 functions as the Controller.
The source voltage for the device are 3.3V and 2.5V and the system clock frequency is 14.318MHz.
7.1 Detection of POWER switch status
The CPU identifies the ON status of the two power supplies. The identification is made when the power supply
is turned off. For example, if the power supply is turned off with the POWER switch, the POWER switch must be
turned on when activating the power supply again. If the power supply is turned off by pulling out the power
cord, then this power supply can be turned on by connecting the power cord, without pressing the POWER
switch.
7.2 Display mode identification
7.2.1 Functions
(1) Display mode identification
l The display mode of input signal is identified based on Table 1.
l When the mode has been identified through the measurement of horizontal and vertical frequencies, the total
number of lines is determined with a formula of Horizontal frequency / Vertical frequency = Total number
of lines. Final identification can be made by examining the coincidence of the obtained figure with the
number of lines for the mode identified from the frequency. The boundary number of lines in each mode is
shown in Table 2.
l When the detected frequency if the sync signal has changed, the total number of lines should be counted even
though it is an identified frequency in the same mode.
(2) Power save mode.
The power save mode is assumed when the horizontal / vertical signals are as specified below.
l If there is no horizontal sync signal input.
l If there is no vertical sync signal input.
l If the horizontal sync signal is outside the measuring range of gm2121.
l If the vertical sync signal is outside the measuring range of gm2121.
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