Set-Up Adjustments - Sony trinitron PVM-1450QM Service Manual

PVM-1450QM/1454QM
SECTION 3
SET-UP ADJUSTMENTS
3-1. PREPARATIONS (1)
I
Service Mode
I
This set is provided with a switch for service on the front panel
that can be used to make various adjustments. The operation
method of this switch is explained in detail below.
1. ENTERING THE SERVICE MODE
Simultaneously press the [ENTER] key and the [DEGAUSS]
key shown on the display of the menu.
2. SERVICE MODE DISPLAY
(I) (5)
(4) (3)
(6)
(2)
Range of Sevice Mode Display
(1) The service items are largely classified into 16 types
displayed by titles.
(2) The names of the service items or READ / WRITE
guidance, etc., are displayed. The names are dispalyed to
the left and the guidance to the right.
(3) This is the serial number for each of the service items.
1-120.
( 4) This is the adjustment data for the servise items that are
now stored in the RAM. Adjustments can be made by
changing these values, but as long as nothing is written to
the ROM the adjustment values will be erased by turning
off the power or by reading, so please be careful.
(5) When the adjustment data than is now displayed is identical
with the data in the ROM, the cursor (
I> )
is displayed.
(6) The present status is displayed.
[*] :
Writing to the ROM. Make sure not to tum off the
power while this display is on.
[?] : ROM reading error. In this case, an image is
output with the standard adjustment data that the
microcomputer itself possesses.
[i,): Problem in the I 'C bus.
3. FINISHING THE SERVICE MODE
Simultaneously press the [ENTER] key and the [DEGAUSS]
key shown on the display of the menu.
4. EASY ON / OFF OF THE SERVICE MODE
If once entering the service mode after having turned on the
power, easy ON / OFF is possible by once more pressing the A,
B or C switch on the front panel (the LED lights) as long as the
power is not turned off or as long as the service mode is not
finished.
5. CHANGE OF POSITION OF THE SERVICE MODE
DISPLAY
If the switch is continuously pressed when turning on in the
above easy mode, the display position moves in the V direction.
This method is used when the display is outside of the effective
screen area.
6. CHANGE OF SERVICE ITEMS
The items are returned with the [MENU] key and forwarded
with the [ENTER] key. When a key is continuously pressed, the
operation will be repeated.
7. CHANGE OF SERVICE DATA
The service data is made larger with the [
t]
key and smaller
with the [
i]
key. When continuously pressing the keys, the
operation will be repeated.
8. READING OF SERVICE DATA
When reading data from the ROM to the RAM, press the [B
/DJ
key once and check than the READ display is shown in the
guidance, and then press the [B / OJ key once again. The
adjustment data that is written will return to its previous state, so
please be careful.
9. WRITING OF SERVICE DATA
When writing data from the RAM to the ROM, press the
[DEGAUSS] key once and check that the WRITE display is
shown in the guidance, and then press the [DEGAUSS] key
once again. Not only the displayed data will be written, but all
data, so please be careful.
10. CARRYING OUT FACTORY RESETTING
In case the adjustment data has been destroyed for some reason,
and you keep pressing the [B / OJ key at the beginning of the
above reading, the READ guidance will change to FACTRY
RESET guidance in approximately 3 seconds so that the factory
resetting can be carried out. By once again pressing the [B / OJ
key after this, resetting will be carried out ([*] will be displayed
as status) and factory resetting will be executed. However, in
case the data available at the time of shipment from the factory
has been destroyed, or if the ROM has been replaced, etc., or if
factory setting mentioned later on has been carried out, factory
resetting is executed.
11. CARRYING OUT FACTORY SETTING
Make sure to make possible the above factory resetting by
making a copy of the adjustment data when replacing the ROM.
If you keep pressing the [DEGAUSS] key at the beginning of
the above writing, the WRITE guidance will change into
FACTORY RESET guidance after approximately 3 seconds. By
once again pressing the [DEGAUSS] key after this, setting will
be carried out ([*]will be dispalyed as status) and the data will
be copied. By carrying out this operation, the selection items of
the menu and the adjustment values will be reset to the standard
conditions, so please be careful. If this operation is carried out
once, it cannot be carried out again, but the FACTORY SET
FLAG (No. 120) in the service mode can be set to I.
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