Nokia 447ZiPlus User manual

ZB1730
01.00
When re---ordering manuals, please quote the model name and part number.
xx
Nokia Display Products Oy
P. O . B o x 1 4
FIN---24101 Salo, Finland
17” Colour Monitor 447ZiPlus

447R
2

1
TABLE OF CONTENTS
PAGE
1. Precautions and notices------------------------------------------ 2
2. Specification----------------------------------------------------------4
3. Control Location and Functions---------------------------------5
4. Disassembly instructions----------------------------------------- 7
5. General Connections & applications---------------------------9
6. Electronic Circuit Description------------------------------------10
7. Adjustment----------------------------------------------------------- 21
8. Troubleshooting follow Chart------------------------------------ 27
9. Block Diagram-------------------------------------------------------34
11. Circuit Diagram-----------------------------------------------------35
10. PCB Layout----------------------------------------------------------37
12. Mechanical Disassembly-----------------------------------------39
13. Mechanical Parts List---------------------------------------------40
14. Electrical Parts List------------------------------------------------41

2
1. PRECAUTIONS AND NOTICES
1-1 SAFETY PRECAUTIONS
1) Observe all cautions and safety related notes located inside the display cabinet and on the display
chassis.
2) Operation of these displays with the cabinet removed involves a safety hazard from electric shock.
Work on the display should not be attempted by anyone who is not thoroughly familiar with
precautions necessary when working on high voltage equipment.
3) Do not install remove or handle the picture tube in any manner unless shatter-proof goggles are
worn. People not so equipped should be kept away while handing picture tube. Keep picture tube
away from the body while handing.
4) The picture tube is constructed to limit X-RADIATION to 0.5MR/HR.at 300 mA anode current. For
continued protection, use the recommended replacement tube only, and adjust the voltages so that
the designated maximum rating at the anode will not be exceeded.
5) Before returning a serviced display to the customer a thorough safety test must be performed to
verify that the display is safe to operate without danger or shock. Always perform an AC leakage
current check on the exposed metallic parts of the cabinet. Proceed as follows.
Connect the monitor power lead to the mains supply, via an isolation transformer, and switch on,
Using the test circuit shown in Fig1-1 measure the AC leakage current between each pole (L and
N) of the supply and all accessible metal parts. The earth leakage current must not exceed 3.5mA
(Fig 1-1)

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1-2 product safety notice
Many electrical and mechanical parts in this chassis provide special visual safety protection. The
protection afforded by them cannot necessarily be obtained by using replacement components rated
for higher voltage. wattage. etc..
Before replacing any of these components. read the parts list in this manual carefully. The use of
substitute replacement parts which do not have the same safety characteristics as specified in the
parts list may create shock, fire.
X-RAY radiation or other hazards.
1-3 service notes
1) When replacing parts or circuit boards. wrap the wires around terminals before soldering.
2) When replacing a high wattage resistor (more than 1/2W) on a circuit board keep the resistor
about 10mm (1/2 in ) away from circuit board.
3) Keep wires away from high voltage or high temperature components.
4) Keep wires in their original position so as to reduce interference.
Specifically for the cancellation wires of the TCO electric field emissions reduction purpose. This
black cancellation wire is taken and connected from the maim chassis connector P500 through a
wire clip which fixed on the heat sink of flyback transformer. Then get this wire underneath the round
rotation coil, soldering on the left-hand side of the copper pad which fitted around the red circle of the
anode connection on the tube back.
Also, care must be taken for the I2C wires from P903A(on the main Board) to P904(on the CDT drive
Board).
This white color and red color wires combined flat wire are used for I2C communication.
It should be fixed on the left side and rear side of FBT heat-sink by clip wires in order to keep away
from the Deflection wires. High Voltage wire (red) and two focus wires (red and white) from FBT,
because I2C are very easy to pick up noise from those wires and caused wrong color or wrong
contrast.

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Time Table For Sync. Signal
Mode No. 1 2 3 4 Unit
Resolution 720 x 400 640 x 480 640 x 480 800 x 600
Horizontal Frequency 31.468 31.469 43.269 37.879 KHz
(A)Horizontal 31.774 31.778 23.11 26.4 usec
(B ) Horizontal Pulse 3.813 3.813 1.556 3.2 usec
(C ) Horizontal Back Porch 1.907 1.907 2.222 2.2 usec
(D) Horizontal Active Area 25.423 25.422 17.778 20 usec
(E) Horizontal Front Porch 0.325 0.636 1.554 1 usec
(F) H. Sync. Polarity - - - +
Vertical Frequency 70 59.94 85.008 60.317 Hz
(O) Vertical Period 14.286 16.683 11.764 16.570 msec
(P) Vertical Pulse Width 0.063 0.064 0.069 0.106 msec
(Q) Vertical Back Porch 1.143 1.049 0.578 0.607 msec
(R )Vertical Active Area 12.698 15.253 11.093 15.840 msec
(S) Vertical Front Porch 0.382 0.317 0.024 0.026 msec
(T) V. Sync. Polarity + - - +
(U) Interlaced No No No No
Mode No. 5 6 7 8 Unit
Resolution 800 x 600 832 x 624 1024 x 768 1024 x 768
Horizontal Frequency 53.674 49.725 48.363 68.677 KHz
(A)Horizontal 18.631 20.113 20.677 14.561 usec
(B) Horizontal Pulse Width 1,138 1.117 2.092 1.016 usec
(C) Horizontal Back Porch 2.702 3.911 2.462 2.201 usec
(D) Horizontal Active Area 14.222 14.522 15.754 10.836 usec
(E) Horizontal Front Porch 0.569 0.558 0.561 0.508 usec
(F) H. Sync. Polarity + - - +
Vertical Frequency 85.061 74.5 60.024 84.989 Hz
(O) Vertical Period 11.756 13.416 16.660 11.765 Msec
(P) Vertical Pulse Width 0.056 0.060 0.124 0.044 Msec
(Q) Vertical Back Porch 0.503 0.784 0.600 0.524 Msec
(R ) Vertical Active Area 11.199 12.551 15.880 11.183 Msec
(S) Vertical Front Porch 0.019 0.021 0.062 0.014 Msec
(T) V. Sync. Polarity + - - +
(U) Interlaced No No No No No
Mode No. 9 10 Unit
Resolution 1152 x 864 1280 x 1024
Horizontal Frequency 67.5 69.095 KHz
(A)Horizontal 14.815 14.473 usec
(B) Horizontal Pulse Width 1.185 1.160 usec
( C) Horizontal Back Porch 2.370 2.219 usec
(D) Horizontal Active Area 10.667 10.758 usec
(E) Horizontal Front Porch 0.593 0.33 usec
(F) H. Sync. Polarity + +
Vertical Frequency 75 65 Hz
(O) Vertical Period 13.333 15.385 msec
(P) Vertical Pulse Width 0.044 0.043 msec
(Q) Vertical Back Porch 0.474 0.567 msec
(R ) Vertical Active Area 12.8 14.82 msec
(S) Vertical Front Porch 0.015 0.041 msec
(T) V. Sync. Polarity + +
(U) Interlaced No No

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3. Control Location and Functions
FRONT
Down/Brightness Key
Select Key
Up/contrast key
Power LED
Power Switch

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Controls on front panel Function
1. Power LED
This indicator will light when the power cord is properly connected and the power switch is ON.
The state of the LED is dependent on the Power State of the monitor. When the LED is green, the
monitor is in the normal state. When it is yellow or amber, it indicates a power saving state.
2. Power Switch
Press to power on the monitor; press again to power off.
We recommend to power your system on first, then the monitor.
3. Select
Press MENU key to reveal the OSD menu which include the sub-menu of the arrow headed item in the
lower half part of the OSD window.
The arrow headed item can be selected by pressing either of + key or - key to move the yellow shadow
bar to the function item which to be selected.
When the yellow shadow bar move to the function of submenu, press the select key, OSD will address
to the adjustment of that certain function, by pressing and hold down either of the + key to increase or –
key to decrease the function setting.
4. +/- Key
Other than above functions, + key can also be direct access for the contrast adjustment, whereas – key
is direct access for the brightness adjustment.

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4. Disassembly Instructions
Disassembly Instructions
1. Face Down The Monitor (Fig 4-1).
2. Back Cover Removal
a) Use small flat bladed screwdriver suitably protected against cabinet damage insert into the four
respective crevices Fig 4-2 ”A” where located on the crevices lateral side of the unit in the seam of
the back & front cover, hold and push the clip down to ease the snap – on lock.
b) Remove the back cover.
c) Unplug the DY connector, AC connector, Degaussing coil connector and the CRT grounding
connector from
the FBT shield.
d) Discharge the remaining static electricity by shorting CRT anode to ground. Then remove the FBT
anode connector (Fig.4-3).
e) Remove the PC main board form sliders of the
front cover (Fig.4-4).
3. PCB Assembly Remove
Caution : When servicing or replacing the CRT Disconnect the Anode and Discharge the Anode
shield completely. As high voltage (26kV) may remain on the Anode for an extended time
after power off.
Fig 4-1 Fig 4-2
A
A
A
A

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Fig.4-3
Fig.4-4