T
echnical
B
ulletin
PAGE: 1/2
Model:
Shepherd-P1
Date:
7-Nov-18
No.:
RJ093006
Subject: Unstable ink ejection without clogged
nozzles is occurred at 'Print Status' pattern.
Prepared by:
Y. Kurohashi
From:
1st System Business Promotion Section, System
Business Department
Classification:
Troubleshooting
Mechanical
Paper path
Product Safety
Part information
Electrical
Transmit/receive
Other (
)
Action required
Service manual revision
Retrofit information
Tier 2
SYMPTOM
Ink ejection from print head is available but printing result is not stable. When printing 'Print
status' pattern, unstable image is printed like following photo.
Cause
Conduction failure between carriage board to print head. The conduction failure may have
caused less communication at printing data.
Solution
1. Disconnect and reconnect the cables and connectors on print head, head amplifier
board and carriage board.
2. Replace the head amplifier boards with new one.
3. Replace the carriage boards with new one.
Example
