Nokia 445PRO, Service Manual

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445N 27
7. Adjustment Procedure
The following procedure must be carried out in case of large service operations e.g. when a circuit
board or nonvolatile memory ICA has been replaced by a new one.
The order of adjustments explained here has been found to produce the desired result with the mini-
mum of effort. Adjustments can also be made in another order or completely separately.
7.1. Adjustment Flow Diagram
The Most Dominant colour
See 7.4.1
Maximum/Minimum contrast
See 7.5
Low light
See 7.4.2
High light
See 7.4.3
6.4 Gray scale
Focus
See 7.6
Adjust the convergence in the middle of
the tube with static adjustments
See 7.7.3
Adjust the convergence in the corners of
the tube with dynamic adjustments
See 7.7.4
6.7 Convergence
Exit from service mode
See 4.2.6
STOP
Perform Preliminary preparations
See 6.2
START
YES
NO
Assemblies
or components
replaced
NO
Reset user
memory for display
modes to be ad-
justed
See 3.1.2
Activate service mode and perform 7.3
para 1), 2) & 3) with 107.10k Hz/85Hz (NCE791)
YES
Memory
replaced
6.3 Geometry
Initializing
4.2.4 Initializing
Perform 6.3 para 4) and 5) for all display modes.
Switch OFF the monitor and
activate service mode
Switch OFF the monitor
The new settings are stored automatically.
(4.2.5)
The new settings are stored automatically.
(4.2.5)
Select display mode 00