Ricoh MP C4503 Technical Bulletin page 440

Reissued: 05-Oct-15
Model:
MET-C1b
RTB Reissue
The items in bold and italics were added or changed.
Subject: Troubleshooting: SC672
From: 1st Tech Service Sect., MFP/P Tech Service Dept.
Classification:
Information required for further investigation when the symptom cannot be resolved by the solution
described in this bulletin was added on the last page.
SYMPTOM
SC672-11 or -12 (Controller start up error) occurs.
SC672-11: Communication error between operation panel and CTL after machine is powered on.
SC672-12: Communication error between operation panel and CTL after normal start-up.
Note:
- SC672 does not appear on the SMC report, since it is not logged.
- The operation panel (Normal Operation Panel / Smart Operation Panel) communicates with the
controller via a USB cable and IPU. SC672 is triggered when the panel cannot communicate with the
controller.
- Applicable models: MP C3003/3503/4503/5503/6003, MP C2003/2503, MP C2011
CAUSE
Possible causes include:
1. Failure of USB communication path (USB cable, IPU)
2. Data corruption of CTL onboard Flash memory
3. Poor supply voltage for CTL onboard ASIC
4. Firmware bug related to energy saving system
5. Defective CTL onboard converter
6. Defective CTL onboard resistors
7. FCU start-up error
Operation panel
Figure 1: Operation panel, IPU and Controller / FCU
echnical
T
Troubleshooting
Mechanical
Paper path
Product Safety
USB
ulletin
B
Date:
22-May-15
Prepared by: E.Hinata
Part information
Electrical
Transmit/receive
Other ( )
Controller
IPU
PAGE: 1/19
No.:
RD147144b
Action required
Service manual revision
Retrofit information
Tier 2
FCU