Ricoh FT5233 Service Manual page 345

12 February 1992
10.5 HIGH VOLTAGE SUPPLY BOARD - CTBG
REPLACEMENT
[A]
[B]
[D]
[C]
1. Turn off the main switch and unplug the power cord.
2. Remove the rear cover.
3. Swing out the main control board assembly (1 screw).
4. Disconnect the bias cable [A] (1 connector, 1 harness lamp).
5. Disconnect the 3 high-voltage cables [B] and a harness [C].
6. Replace the CTBG power pack [D] (3 locking supports).
7. Reassemble the machine.
8. Plug in the power cord.
9. While pressing both "1" and "3" on the operation panel number keys, turn
on the main switch in order to access the SP mode.
NOTE: Release the number keys after confirming that the Call Service
indicator and the copy counter number "0" are blinking.
10. Enter "62" (grid voltage setting mode) using the number keys and press
the enter key.
11. Enter the new grid voltage correction data labeled on the board using the
number keys and press the enter key.
12. Adjust the transfer corona current.
(See T/S corona current auto adjustment.)
13. Enter the factory set data for the separation corona current by SP163 and
SP164 if the high voltage supply board – D is the original one.
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