Gestetner B147, Service Manual

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TROUBLESHOOTING GUIDE
SM 4-79 B147/B149/B190
Trou
ble
-
sho
oting
Fusing roller speed adjustment
1. Perform the line position adjustment (SP5-993-002 or ‘Auto Adjust’ in User
Program mode).
2. Print a 1-dot grid pattern for each of the following modes using A3/11" x 17"
paper.
(1) Normal, 600 dpi
(2) Normal, 1200 dpi
(3) Thick, 1200 dpi
3. If the color has shifted within 100 mm from the trailing edge, follow the
troubleshooting procedure (Sub-scan/Trailing edge).
Registration roller speed adjustment (for color mode)
1. Perform the line position adjustment (SP5-993-002 or ‘Auto Adjust’ in User
Program mode).
2. Print a 1-dot grid pattern for each of the following modes using A3/11" x 17"
paper.
(1) Normal, 600 dpi
(2) Normal, 1200 dpi
3. If the color has shifted within 100 mm from the leading edge, follow the
troubleshooting procedure (Sub-scan/Leading edge).
NOTE: The registration roller speed for by-pass paper feed is the same as for
normal 1200 dpi mode.
Line position fine adjustment for sub-scan
1. Print a 1-dot grid pattern each for each of the following modes using A3/11" x
17" paper.
SP5-997 (Test Pattern) Setting
Mode
Tray
selection
Pattern
Color
mode
Resolution
Paper size
(By-pass)
Normal, color, 600 dpi 2 05 Full Color 600x600 -
Normal, color, 1200 dpi 2 05 Full Color 1200x1200 -
Thick paper 0 05 Full Color 1200x1200 A3 / 11x17
2. Check if there is any color which has shifted from the black line by the same
amount all the way down the page from leading to trailing edge. If there is,
follow the troubleshooting procedure (Sub-scan/Whole image).