Brother International HL-3400CN Service Manual - Page 204

HL-3400CN SERVICE MANUAL 4.8 Transfer Drum Replacement Criterion of Replacement The transfer drum should be replaced with a new one according to the periodical maintenance cycle set out in the Table 6-4. When time is due for replacement of the transfer drum, the following message appears on the control panel. LJ READY 001P T1 REPLACE TRF DRUM It should be also replaced when an image failure occurs due to transfer drum damage. Work Procedure (1) Whenever an image failure occurs, confirm the cause by following the information in Section 5 of Chapter VIII. (2) If the image failure still occurs, replace the transfer drum referring to Section 4.2.10 of Chapter 7. Transfer drum N 0 Fig. 6-30 A. CAUTION • This is one of the periodic replacement items, not customer service. It should be implemented upon request of the customer or at periodic maintenance. • After replacement, confirm the improvement ofprint quality failure by test printing. 6-33