SP OFF mode?

SC234 on a Ricoh MP C2000

Ther service manual states that SC234 indicates FGATE ON error: M
The PFGATE ON signal does not assert within 5 seconds after processing the image in normal job or MUSIC for start position M.

What that means.. is:
The FGATE signal did not go off within the prescribed time. (The BICU generates the FGATE signal and sends it to the LD unit when the registration sensor switches on.)
My first though would be trouble with the BICU board.. buy it may be several reasons.
It indicates there is one of these errors:
- Defective ASIC (Lupus)
You can perform tests in servicemode to confirm.
- Poor connection between controller and BICU.
Check connections, perform tests.
- Defective BICU.
..yeah.. they fail sometimes..

You should start and try to perform a scanner IPU board test in service mode.
If you follow a complete procedure, you can find out whats wrong.

Scanner Test Mode
VPU Test Mode
Output the VPU test pattern with SP4-907-001 to make sure the scanner VPU control
operates correctly. The VPU test pattern prints out after you have set the SP mode settings
and pressed the start key.

- The CCD on the SBU board may be defective if the copy is abnormal and the VPU test
pattern is normal.

- The following can be the cause if the copy is normal and the VPU test pattern is
abnormal:

- The harness may not be correctly connected between the SBU and the BICU

- The BICU (IPU) or SBU board may be defective.

BICU (IPU) Test Mode
You can check the BICU (IPU) board with the SP mode menu, SP4-904-1 or -2.
Here the machine performs a write and read check of the ASICs on the BICU board and displays
the result.
0: OK, 1: Error
(Pay attention on Bit 2: Lupus register..)

If no error is detected, the test ends. Then the completion code shows in the operation panel
display. If an error is detected, the test is interrupted. Then an error code shows.
The table
below lists the completion and error codes.

SP4-904-1 Register Access
There are 16 bits switches in this SP. Each bit indicates each CPU as followings. The error
result is displayed on the operation panel in decimal number.
0: Normal, 1: Error
Bit 0: TAURUS register
Bit 1: ORION register
Bit 2: LUPUS register
Bit 3 to 11: Not used
Bit 12: Ri20 register
Bit 13 to 15: Not used


SP4-904-2 Image Path
There are 16 bits switches in this SP. Each bit indicates each CPU path as followings. The
error result is displayed on the operation panel in decimal number.
0: Normal, 1: Error
Bit 0: Image path from SBU to TAURUS
Bit 1: Image path from TAURUS to ORION
Bit 2: Image path from ORION to TAURUS
Bit 3: Image path from TAURUS to LUPUS
Bit 4 to 11: Not used
Bit 12: Image path from LUPUS to Ri20
Bit 13: Image path from Ri20 to GAVD
Bit 14 and 15: Not used

Errors may be caused by the following problems:

1. Short circuit on the signal lines
- When the BICU board is installed, a pin or two on the ASIC is damaged.
- Some conductive matter or object is trapped among the pins. Metal "dust" from screws and what not.
- Condensation

2. Destruction of circuit elements
- Over current or a defective element breaks the circuit.

3. Abnormal power supply
•The required voltage is not supplied to the devices.

4. Overheat/overcooling
- The environment is inappropriate for the board (the scanner unit).
Not common if the machine is in a normal location.

5. Static electricity
- Static electricity of a high voltage occurs during the test.
Not common if the machine is connected to a grounded outlet (and nobody has touched the boards inside the machine).

6. Others
- The scanner and BICU are incorrectly connected.
When you have completed a check, turn the main switch off and on before you do another
check. When you have completed all necessary checks, turn the main switch off and on.

Hope this helps.

Pawn shops are skilled buyers, you can often rest assured knowing that the laptop was well inspected and tested before the pawn shop decided to accept it for loan or as a buy. For more information, visit at Electronics

Once in service mode (CLEAR MODES KEY, 107, HOLD CLEAR STOP KEY) enter sp 2902-003, enter test pattern#16 and press start. press copy window and select paper size, press start key twice to start test print. press sp mode to return to sp mode display. Hope this helps

firs you go to SP mode while pressing

Starting SP Mode

1. Type the keys as follows:cleare mode button which appers in yellow color and continue the numbers 107

2. Press the cleare button which appers in red color and hold it down until the SP-mode menu is displayed (about 3 seconds) then switch OFF the machine and switch ON this process re-set the code -thanks

1 2 3

4 5 6

7 8 9

0 #

The "super" output should give you playback video just like the other outputs, only with the on-screen display. These decks use separate video and audio heads; dirty video heads could produce a "no video" symptom.

A couple things may cause this:
If a speaker wire shorted out (either a voice coil or the wire itself is grounded; touches the vehicles chassis ground)
Solution: disconnect each speaker from the deck and see if it turns back on. 90% of the time thats the problem.

It could be overheating.

This is what the owners manual says about Protect mode......

The speaker wire has a short-circuit or touches the chassis of the vehicle, and then the protegtion function is activated. Wire or insulate the speaker cable properly and press the reset button.

you have one of your speaker wires shorted out to the body of the car somewhere, or the speakers that you installed are bad. That is the only two reasons it will go into protect. Correct the problem, then reset the deck - it should work fine.
Kenwood builds this feature in to protect the outputs - so they dont burn up in the case of shorted speakers or wiring.

check for any loose connections at the fuse block or a loose fuse
using an ohm meter would help
check the harness on the back of the radio for loose connection
bad igntion switch, again an ohm meter would help !
what type vehicle ?

return SP1-902-1 to 0. Then, the SC will
be cleared.