SATO TG308, Service Manual

Page: 180 / 252

Section 6: Checks and Adjustment Procedures
Page 6-42
TG3 Series Service Manual
6.18 ADJUSTING RIBBON TENSION (Cont’d)
6.18.2 Ribbon shaft plates adjustment
The adjustment of the ribbon shaft plates is to compensate for the axis deviations of the ribbon spindle
causing the ribbon wrinkles.
Required tool:
Phillips head screwdriver and flat-blade screwdriver
1.
Switch off the printer and disconnect power supply cord.
2.
Remove the main cover, left housing cover and the top left housing cover to gain access to the internal
(electrical and mechanism) hardware. Refer to
Section 7.1 Removal of Housing cover
for details.
3.
Loosen four screws of the adjust plates for ribbon shaft with a Phillips screwdriver (JIS No. 2 or equiva-
lent). (Do not completely unscrew)
4.
Move the adjust plates left and right with a slotted screwdriver to adjust the ribbon tension as shown below.
5.
Tighten the fixation screw of adjust plate, which was loosened in the step 3.
6.
Re-assemble the housing cover and perform a test print to check on ribbon wrinkles.
7.
Repeat steps 1 through 5 until proper adjustment is achieved.
ATTENTION:
ADJUST THE RIBBON TENSION BY USING RIBBON GUIDE OF PREVIOUS PROCE-
DURE. ATTEMPT TO THIS ADJUSTMENT FOR THE LAST RESORT. LEAVE THE RIB-
BON SHAFT AS IT IS (FACTORY DEFAULT) IF POSSIBLE (IT COMES WITH THREAD
LOCK).
j
Fixation screws
Fixation screws
Adjust the ribbon tension using the scale
Ad
ust plate