Citizen CLP-621 Technical Manual

3-6. Adjustments
CLP-621 & CLP-631 3-50
Removing Ribbon Wrinkles
T he following explains the general procedure for removing ribbon wrinkles.
Adjusting points:
• Ribbon tension
• Ribbon Left-Right Balance Adjustment Knob (Front) - Ribbon slant
• Ribbon Left-Right Balance Adjustment Knob (Rear) - Ribbon slant
• Ribbon Guide Shaft (a part of the Head SA) - Ribbon slant
How to check ribbon wrinkles:
• Visual check
Adjustment procedure:
First, adjust the ribbon tension and then the ribbon paths (front/rear) to remove ribbon wrinkles.
(1) Ribbon Tension Adjustment
1. Adjust the ribbon tension on the front and rear sides to obtain the specified value. Refer to
3-6-3 “Ribbon Tension Adjustment”.
2. Proceed to the next item, (2).
(2) Ribbon slant elimination adjustment
Ribbon is fed from the supply side and taken up on the take-up side via the Ribbon Tension
Shaft R SA of the Ribbon Sensor R Unit and the Ribbon Tension Shaft F SA of the Ribbon
Sensor F Unit. (See the figure on the next page.)
1. Adjust the Ribbon Left-Right Balance Adjustment Knob (Front) and then the Ribbon
Left-Right Balance Adjustment Knob (Rear) to remove ribbon wrinkle.
Refer to 3-6-2-(1) “Ribbon slant elimination adjustment (For user)”.
2. If satisfactory results are not obtained, the following adjustments will be required.
• 3-6-2-(2-1) “Tension base adjust cam position adjustment (For service personnel)”.
• 3-6-2-(2-2) “Ribbon guide position adjustment in the Head SA (For service personnel)”.
(2-1) Visual check and adjustment
Checking the ribbon surface visually is a good way to see whether the ribbon wrinkles or
not. You can find wrinkles by the reflected light on the ribbon surface. Check both take-up
side and supply sides of ribbon. (See the figure on the next page to find the places where
wrinkles may appear.)
Note: For removing wrinkles,
front side adjustment is more effective than the rear side
one.
1. Perform test print in self print mode. (Refer to 2-3-2-(2-1) “Self print mode”.)
2. Visually check the take-up side for ribbon wrinkles.
Since ribbon is taken up stronger on the shorter ribbon path side, wrinkles appear on
the longer path side. During printing the self print patterns, check wrinkles and correct
the ribbon travel as follows:
• If wrinkles are found on the left side (“a” in the figure), turn the Ribbon Left-Right
Balance Adjustment Knob (Front) clockwise.

Citizen CLP-621 Specifications

General

USB port	No
RS-232 interface	Yes
Optional connectivity	Ethernet
USB 1.1 ports quantity	1
USB 2.0 ports quantity	0
Connectivity technology	Wired
Flash memory	2 MB
Certification	UL, C-UL, FCC class A, CCC, CE Marking
Internal memory	8 MB
Number of fonts	2
Built-in barcodes	PDF417, UPC-A, UPC-E
Built-in processor	32 Bit RISC
Mean cycles between failures (MCBF)	1000
Power consumption	2400 mA
Power requirements	100 - 240V, 50 / 60Hz
Compatible operating systems	Windows 2000, XP, Vista
Core diameter	25.4 mm
Ribbon length	360 m
Media thickness	0.0635 - 0.254 mm
Maximum label length	812 m
Maximum roll diameter	127 mm
Supported paper width	19.5 - 118 mm

Weight and Dimensions

Depth	114 mm
Width	91 mm
Height	104 mm