HP LaserJet Pro CP1525 Service Manual - Page 55

DC controller PCA, Special consideration, Remove the DC controller PCA, WARNING

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DC controller PCA Special consideration WARNING! Do not install a replacement formatter PCA and DC controller PCA at the same time, and then turn the product power on. The formatter PCA and the DC controller PCA store important product configuration information (NVRAM data) that will be lost if both PCAs are replaced at the same time. When the product power is turned on, the formatter will restore the NVRAM data to a replacement DC controller. Replacing both the DC controller and the formatter at the same time will result in severe print-quality problems. Replacing the DC controller PCA before the formatter PCA Use the following procedure if you need to install a replacement DC controller and a replacement formatter PCA. NOTE: If you are only installing a replacement DC controller PCA, proceed to DC controller PCA on page 37. 1. Install a replacement DC controller PCA. 2. Turn the product power on, and wait for the print-cartridge volume indicators to appear on the control-panel display. NOTE: This allows important product information to be written to the replacement DC controller PCA. 3. Turn the product power off. 4. Install a replacement formatter PCA. See Formatter PCA on page 40. 5. Turn the product power on. Remove the DC controller PCA CAUTION: Do not bend or fold the flat flexible cables (FFCs) during removal or installation. Also, do not straighten pre-folds in the FFCs. You must make sure that all FFCs are fully seated in their connectors. Failure to fully seat an FFC into a connector can cause a short circuit in a PCA. Some parts are sensitive to electrostatic discharge (ESD). Look for the ESD reminder when removing product parts. Always perform service work at an ESD-protected workstation or mat. If an ESD workstation or mat is not available, ground yourself by touching the sheet-metal chassis before touching an ESD-sensitive part. 1. Remove the following components: ● Right cover. See Right cover on page 10. ● Left cover. See Left cover on page 13. ● Control-panel module. See Control-panel module on page 19. ● Rear-side cover. See Rear-side cover on page 21. ENWW Removal and replacement procedures 37

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DC controller PCA
Special consideration
WARNING!
Do not install a
replacement
formatter PCA and DC controller PCA at the same time,
and then turn the product power on.
The formatter PCA and the DC controller PCA store important product configuration information
(NVRAM data) that will be lost if both PCAs are replaced at the same time. When the product power
is turned on, the formatter will restore the NVRAM data to a replacement DC controller.
Replacing both the DC controller and the formatter at the same time will result in severe print-quality
problems.
Replacing the DC controller PCA before the formatter PCA
Use the following procedure if you need to install a replacement DC controller
and
a replacement
formatter PCA.
NOTE:
If you are only installing a replacement DC controller PCA, proceed to
DC controller PCA
on page
37
.
1.
Install a replacement DC controller PCA.
2.
Turn the product power on, and wait for the print-cartridge volume indicators to appear on the
control-panel display.
NOTE:
This allows important product information to be written to the replacement DC controller
PCA.
3.
Turn the product power off.
4.
Install a replacement formatter PCA. See
Formatter PCA
on page
40
.
5.
Turn the product power on.
Remove the DC controller PCA
CAUTION:
Do not bend or fold the flat flexible cables (FFCs) during removal or installation. Also, do
not straighten pre-folds in the FFCs. You
must
make sure that all FFCs are fully seated in their
connectors. Failure to fully seat an FFC into a connector can cause a short circuit in a PCA.
Some parts are sensitive to electrostatic discharge (ESD). Look for the ESD reminder when
removing product parts. Always perform service work at an ESD-protected workstation or mat. If an
ESD workstation or mat is not available, ground yourself by touching the sheet-metal chassis
before
touching an ESD-sensitive part.
1.
Remove the following components:
●
Right cover. See
Right cover
on page
10
.
●
Left cover. See
Left cover
on page
13
.
●
Control-panel module. See
Control-panel module
on page
19
.
●
Rear-side cover. See
Rear-side cover
on page
21
.
ENWW
Removal and replacement procedures
37