300 dpi against economode

Firstly I doubt that economode is set by default, but maybe the printer is in
economode for some reason.
Secondly I would normally expect the problem to be the toner cartridge but
assuming you have checked this my suggestions are as follows.
1. Run two internal prints from the printer.
a. By pressing the green "go" button briefly.
b. By holding the green "go" button for 5 seconds.
The first print should give you an indication of the print quality, if it
is good then the printer itself is probably behaving normally.
The second print will tell you exactly how the printer is set up. This
includes whether economode is on or off and what print density it is set for
(default is 3, range is 1-5).
2. If economode is on or the print density is lower than 3 the easiest way to
fix this is to do a cold reset on the printer as follows.
Important note: This will reset the printer to factory defaults, the only
setting that is critical is the jetdirect setting. Since you stated that your
printer is a 1320 and that you are running DOS I am assuming that it does not
have an "n" (for network) suffix eg 1320n. If I am right in this assumption you
can ignore the jetdirect comments above, if it is a network printer the second
printout from 1a should provide the jetdirect information which you may need to
keep for future reference.
Cold Reset Procedure:-
a. Turn the printer power off
b. Press and "hold" the green "go" button whilst turning the printer on.
c. Continue to hold the go button for at least 5 seconds and until the amber
attention light turns on (triangle with ! in the middle), this should occur
before 15 seconds elapses.
d. Release the go button.
Factory defaults should now be reset and you can check using 1a whether any
changes occurred.

you can change setting of economode in EWX page

First of all check your printing preferences

1. Right-click the product icon, and click Printing Preferences to open the Printing Preferences window.
2. Click the Paper/Quality tab.
3. Check the paper or media type setting.
   1. Find the Type is: drop-down list.Figure 1: 'Type is:' drop-down list in the Printing Preferences window'Type is:' drop-down list in the Printing Preferences window, Paper/Quality tab (screenshot)
   2. Select the paper or media type you are using.
      • For thinner paper, select Light , Thin , or Vellum .
      • For thicker paper, select Heavy or Thick .
      NOTE:HP does not recommend the use of heavily textured paper, extremely thin paper, or paper with a basis weight heavier than 90 g/m2 (24 lb).
4. Make sure the paper or media type setting is appropriate for the fuser temperature.NOTE:Unlike ink printers, laser printers use heat to fuse a plastic toner to the surface of the paper. Make sure to use heat-resistant paper, and labels and envelopes that use adhesives compatible with the heat and pressure of the product's fusing process.
   1. If you are experiencing any issues in the following list, adjust the setting.
      • If the paper is curled or wavy , try the following:
        1. Decrease the fuser temperature setting. To do this, select Light ,Thin , or Transparency .
        2. Use the archive print feature to improve toner fusing. To do this, select Archive or Bond .
      • If the printout has areas of fuzzy or dark print , or toner scatter , increase the fuser temperature setting.
        1. Select Heavy or Thick .If this does not resolve the fuzzy, dark print, or toner scatter issues, use a lower basis weight or thinner paper.
5. Click Apply .

Step three: Check the print density settingsFollow these steps to check the print density settings in Printing Preferences and in Properties.

1. In the Printing Preferences window, click the Paper/Quality tab, and find the Print Quality section.Figure 2: 'Print Quality' section in the Printing Preferences window'Print Quality' section in the Printing Preferences window, Paper/Quality tab (screenshot)
2. If you are experiencing any issues in the following list, adjust the settings.
   • If the entire page is too dark , change the dpi setting, and turn on EconoMode .
     1. Select 600 dpi from the drop-down list.
     2. Select the EconoMode check box.
   • If the entire page is too light , change the dpi setting, and turn off EconoMode .
     1. Select FastRes 1200 from the drop-down list.
     2. Clear the EconoMode check box.
3. Click Apply , click OK , and then close the Printing Preferences window.
4. Open Printer Properties. To do this, right-click the product icon, and click Properties .
5. Click the Device Settings tab, and find the Print Density section.Figure 3: 'Print Density' section in the Properties window'Print Density' section in the Properties window, Device Settings tab (screenshot)
6. If you are experiencing any issues in the following list, adjust the setting.
   • If the printout has areas of gray shading or a gray background , decrease the print density setting.To do this, slide the bar to the left .
   • If the printout has light, dull or faded areas , increase the print density setting.To do this, slide the bar to the right .
7. Click Apply , click OK , and then close the Properties window.
8. Try again to print.If these steps do not resolve the light, dull or faded issue, the print cartridge is almost empty. Skip to Solution eight: Replace the print cartridge .

• If these steps resolved the issue , you do not need to continue troubleshooting.
• If the issue persists , see the next solution.If this don't help you, here is instructions for refilling a toner cartridge.

http://www.uninetimaging.com/downloads/technical/hp/english/HP_P_1006_Reman_eng.pdf
Maybe you need to clean the drum, blades or the developer roller. Maybe the problem is in the toner you use.

It's not a camera setting.
DPI is "dots per inch". This only has meaning when the picture is output (usually printed, but also displayed on a screen). You can make two different-sized prints from the same photo file, and they will have different DPI settings even though they come from the same file.
A photo editing/printing program will let you control the DPI when you print a photo (and some will let you change the value when you save the file).

EconoMode This product has an EconoMode option for printing drafts of documents. Using EconoMode can use less toner and decrease the cost per page. However, using EconoMode can also reduce print quality. HP does not recommend full-time use of EconoMode. If EconoMode is used full-time, the toner supply might outlast the mechanical parts in the print cartridge. If print quality begins to degrade under these circumstances, you will need to install a new print cartridge, even if there is toner supply remaining in the cartridge. Enable or disable EconoMode in any of these ways:

• At the product control panel, select the CONFIGURE DEVICE menu, and then select the PRINT QUALITY submenu. EconoMode is turned off by default.
• In the embedded Web server, open the Settings tab and select the Configure Device option. Navigate to the Print Quality submenu.
• In the HP Printer Utility for Macintosh, click Configuration Settings , and then click Economode & Toner Density .
• In the Windows PCL printer driver, open the Paper/Quality tab, and select the EconoMode option.

HP support does not list the dpi for its "EconoMode (Save Toner)" setting, however the next highest setting is 600 dpi.

If you are printing drafts and want to save toner, the EconoMode can be chosen in Control Panel from one of your printer's properties tabs.

You will need to follow below process.
Print quality settings always affects on print resolution and toner usage.
to change print quality setting:
1. go to Start/settings/control panel/printers
2. then go to printer's properties.
3. go to paper/quality TAB. and select the setting that you want to use. you will get following options.
a) 1200 dpi: This setting uses ProRes 1200 to provide fine-line detail at 1200 x 1200 dpi.
b) 1200 dpi effective output quality: This setting uses ProRes 1200 to provide fine-line detail at 1200 x 1200 dpi.
c) 600 dpi: This setting provides 600 x 600 dpi output with Resolution Enhancement technology (REt) for improved text. (this is what you may need to get)
d) Economode: this settings use less toner of your printer. This is useful for mostly draft printings. You can turn this button on freely of other printing-quality settings.

Select the needed settings. Test a print.
And if it is perfect you wont be charge to give recommendation...lol

Hi,
Below you can see a step by step procedure on how to change the print quality of your work....you need to make test printouts in order for you to see the results....at the end there is a link to the manual for your printer...GOOD LUCK!!!

Print-quality settings affect print resolution and toner usage.
Use the following procedure to change print-quality settings:
1. Open the printer Properties (or Printing Preferences in Windows 2000 and XP).
2. On the Paper/Quality tab or the Finishing tab (the Paper Type/Quality tab for some Mac drivers),
select the print quality setting you want to use. The following options are available:
● 1200 dpi: This setting uses ProRes 1200 to provide fine-line detail at 1200 x 1200 dpi.
● 1200 dpi effective output quality: This setting provides 1200 dpi effective output quality
using FastRes 1200.
● 600 dpi: This setting provides 600 x 600 dpi output with Resolution Enhancement technology
(REt) for improved text.
● EconoMode: Text is printed using less toner. This setting is useful when you are printing
drafts. You can turn on this option independently of other print-quality settings.

Manual

Your printer doesn't have a 300 DPI setting, however, you can select "EconoMode" from the "Preferences" menu after you select "Print". Look for a tab that says "Quality". EconoMode will be lighter than normal 600 DPI printing, thereby saving toner.

You need to be able to change the DPI setting in the image file. This can be done in most complete photo editors, though they tend to name the procedure in different ways. In Corel Photo-Paint, you would look for "Resample Image". In the open source photo editor Gimp, look for "Scale" under "Image".

In all such procedures, what you want is to set both the vertical and horizontal DPI values to 300, apply them, then save the image. Please do save it to a different filename, since you lose some quality of JPEG images every time they are saved.