User manual KONICA MINOLTA LT-352 LT352 SERVICE MANUAL

[. . . ] SERVICE MANUAL Model LT-352 SEPTEMBER 1999 CSM-LT352 KONICA BUSINESS TECHNOLOGIES, INC. LT-352 SERVICE MANUAL September 1999 Used on Model 7065 IMPORTANT NOTICE Because of the possible hazards to an inexperienced person servicing this equipment, as well as the risk of damage to the equipment, Konica Business Technologies strongly recommends that all servicing be performed by Konica-trained service technicians only. Changes may have been made to this equipment to improve its performance after this service manual was printed. Accordingly, Konica Business Technologies, Inc. , makes no representations or warranties, either expressed or implied, that the information contained in this service manual is complete or accurate. It is understood that the user of this manual must assume all risks or personal injury and/or damage to the equipment while servicing the equipment for which this service manual is intended. Corporate Publications Department © 1999, KONICA BUSINESS TECHNOLOGIES, INC. [. . . ] Remember. . . when performing service calls, use good judgement (have a watchful eye) to identify safety hazards or potential safety hazards that may be present, and correct these problem areas as they are identified -- the safety of those who operate the copier as well as those who service the copier depend on it! · · · · vi LT-352 PRODUCT SPECIFICATIONS Type Type: Large capacity paper feed tray mounted on side of the main body. Maintenance Maintenance: Same as the main body Machine life: Same as the main body Functions Paper size: 8. 5" x 11" Kind of paper: High quality paper (16 - 24 lb. ) Maximum capacity: 3500 sheets (22 lb. ) Operating Environment Temperature: 50 to 91°F Humidity: 10 to 80%RH Machine Data 5, 24 and 40 VDC (Supplied from the main body. ) Maximum power consumption: 82 VA Weight: Approximately 58 lb. Machine dimensions: W 366 x D 553 x H 645 Power supply: Note: The contents of this manual may be changed without prior notice for the sake of improvement. (Unit = mm) 1 LT-352 CENTER CROSS-SECTIONAL DRAWING Feed roller Paper feed roller Double feed prevention roller Upper cover Conveyance roller Up/down plate Remaining paper indication belt Up/down belt 2 LT-352 DRIVE SECTION Conveyance drive section Paper feed motor (M800) Double feed prevention roller Conveyance roller Feed roller Paper feed roller Paper feed clutch (MC800) 3 LT-352 Stacker drive section Up/down belt Up/down plate Up/down motor Remaining paper indication belt Up/down shaft 4 LT-352 PAPER FEED SECTION Composition Down button LT upper limit detection PS (PS801) Paper feed roller unit LT no paper detection PS (PS800) Up/down plate (Tray) Mechanisms Method Belt drive Paper feed 1st paper feed roller No paper detection PS800 Paper size detection None *2 Remaining paper indicator Linked to up/down plate Paper conveyance Roller conveyance Paper size 8. 5" x 11" Mechanism *1 Paper lifting b. Lowering operation of the up/down plate When the upper cover is opened, the up/down plate automatically falls 100 mm. Subsequently, each time the down button is pressed, the up/down plate falls a distance equal to the height of the loaded paper. *2: Remaining paper indicator The amount of paper remaining in the paper tray can be judged from the state of the indicator belt that is visible from the front slit. The indicator belt is directly linked to the up/down motion of the up/down plate. *1: Paper lifting a. Lifting operation of the up/down plate The up/down plate is lifted by belt drive. When the upper cover is closed, the up/down plate drive motor (M801) rotates, causing the up/down plate coupled to the up/down drive belt to raise. 5 LT-352 Disassembly and Reassembly 1. Removing and Reinstalling the Paper Feed roller Unit a. (2) Remove the spring from the paper feed roller unit. Replacing the paper feed roller Rubber and the Feed roller Rubber a. Procedure (1) Remove the paper feed roller unit. (2) Remove the three stop rings and the three bearings on the paper feed roller unit, and also the paper feed reference actuator and the two shafts, then remove each roller. (3) Remove the rubber (feed rubber/A and double feed prevention rubber) from each roller. Upper cover Spring Paper feed drive belt Paper feed roller unit Double feed prevention rubber Paint mark Feed roller Blue mark Stop ring Bearing Stop ring Bearing (3) Remove the two stop rings and the two bearings, then remove the paper feed roller unit. Feed rubber/A Paper feed roller Bearing Paper feed Stop ring reference actuator Blue mark Paper feed roller unit (4) Reinstall the above parts in the opposite sequence to removal. Caution: Ensure that the mounting direction of the rubber and rollers are correct. Bearing Stop ring Bearing Stop ring (4) Reinstall the paper feed roller in the opposite sequence to removal. 6 LT-352 3. Replacing the Double feed prevention roller rubber a. Procedure (1) Remove the three set screws, then remove the paper feed cover (left). (3) Remove the two stop rings, then pull out the shaft and remove the double feed prevention roller together with the paper feed reversal gear. Paint mark Double feed prevention roller (rubber) Paper feed reversal gear Stop ring Shaft Paper feed cover (left) Stop ring Set screws (2) Remove the two set screws, then remove the double feed prevention roller unit. Repeat 1~4 until the miscentering value is within the standard. 10 LT-352 ELECTRICAL PARTS LAYOUT DRAWING 3 2 1 7 10 5 9 12 8 14 4 13 6 11 1. Switch/Sensor 1 2 3 4 5 6 7 8 9 PS800 PS801 PS802 PS803 PS804 PS805 PS806 SW800 SW801 LT no paper detection PS LT upper limit detection PS LT pre try PS LT conveyance PS LT release PS LT lower limit detection PS LT pre feed PS LT down SW LT cover open/close SW 2. Load 10 11 12 M800 M801 MC800 LT paper feed motor LT up/down motor LT 1st paper feed MC 3. Others 13 14 LT CB HTR LT control board Heater 11 LT-352 CONNECTOR LAYOUT DRAWING 821(W:6 PIN) 811(B:3 PIN) 812(R:3 PIN) 810(W:3 PIN) 815(W:3 PIN) 820(W:11 PIN) 827(W:11 PIN) 814(W:3 PIN) 802(W:13 PIN) 824(BK:2 PIN) 822(W:2 PIN) 823(BK:2 PIN) 813(W:3 PIN) 826(BK:2 PIN) 801(W:16 PIN) 816(BK:3 PIN) 816(W:3 PIN) 391(W:2 PIN) 831(W:2 PIN) 830(W:2 PIN) 126(BK:10 PIN) 803(W:18 PIN) 804(W:5 PIN) 800(W:5 PIN) 127(BK:10 PIN) 391(W:2 PIN) 12 OVERALL WIRING DIAGRAM 5V DC SGND M800 LD M800 CONT M800 MODE M800 CLK M800 FG PGND PGND 40V DC 40V DC P 803-A1 803-A2 H 803-A3 H 803-A4 803-A5 803-A6 803-A7 803-A8 803-A9 803-B8 803-B9 827-1 827-2 827-6 827-3 827-5 827-4 827-7 827-8 827-9 827-10 827-11 M800 LCT PAPER FEED MOTOR 24V DC1 MC800 DRIVE 803-B1 H 803-B2 820-8 820-9 821-3 821-4 823-1 823-2 MC800 LCT 1st PAPER FEED CLUTCH SGND PS800 5V DC L 802-1 802-2 802-3 820-1 820-2 820-3 810-1 810-2 810-3 PS800 LCT NO PAPER SENSOR 811-1 PS801 802-4 820-4 811-2 811-3 PS801 LCT PAPER UPPER LIMIT SENSOR LT DB 812-1 PS802 H 802-5 820-5 812-2 812-3 PS802 LCT PRE W SENSOR SGND PS803 5V DC H 802-6 802-7 802-8 813-1 813-2 813-3 PS803 LCT CONVEYANCE SENSOR SGND 40V DC 24V DC PGND 88-4 99-1 88-2 126-1 126-2 126-3 800-1 800-2 800-3 PS804 5V DC 802-9 802-10 802-11 814-1 814-2 814-3 PS804 LCT RELEASE SENSOR 5V DC SGND 140-A1 140-A2 126-4 126-5 800-4 800-5 24V DC SW801 803-B3 H 803-B7 820-10 820-11 821-5 821-6 824-1 824-2 SW801 R B LCT COVER DETECTOR M800 CLK M800 CONT P H 140-A3 140-A4 140-A5 126-6 126-7 126-8 126-9 126-10 127-1 127-2 127-3 127-4 127-5 127-6 127-7 127-8 127-9 127-10 127-11 801-A1 801-A2 801-A3 H 801-A4 801-A5 801-A6 801-A7 801-A8 801-B1 801-B2 801-B3 801-B4 801-B5 801-B6 801-B7 H 801-B8 H SW800 PS805 L L L H L L L PS800 PS801 PS802 PS803 LT352 ADD (NC) SW801 PS804 SGND SW800 H 802-12 802-13 820-6 820-7 821-1 821-2 822-1 822-2 SW800 SGND PS805 5V DC 804-1 804-2 804-3 816-1 816-2 816-3 NC M801 DRIVE 2 804-5 M800 PLL M801 DRIVE 1 804-4 826-1 M801 CONT PS806 MC800 CONT 140-A6 L 140-B10 H 140-A8 140-A9 140-B1 140-B2 140-B3 140-B4 140-B5 140-B6 M801 826-2 LCT TRAY UP/DOWN MOTOR PS805 LCT TRAY LOWER LIMIT SENSOR M801 F/R H 140-B7 140-B8 140-B9 LCT TRAY DOWN SWITCH 816-1 816-2 816-3 391-1 BK 391-2 391-1 815-1 815-2 815-3 PS806 LCT PRE-FEED SENSOR AC (H) 752-1 BK 830-1 HRT AC (N) 752-2 W 391-2 W 830-2 LCT HEATER 831-1 MAIN BODY 831-2 13 This page left blank intentionally. 14 PARTS CATALOG Model LT-352 SEPTEMBER 1999 CSM-LT352 KONICA BUSINESS TECHNOLOGIES, INC. How to use this catalog This parts catalog includes illustrations and part numbers for all replacement parts and assemblies used in this model. [. . . ] Paper feed sprocket spacer Paper feed stopper . 11 13 13 7 13 9 7 5 11 7 9 13 13 3 3 13 13 11 11 11 5 13 5 7 7 7 7 3 3 3 3 7 3 18 1 23 19 30 21 8 7 22 22 18 31 29 1 21 12 5 13 4 10 11 6 13 10 12 9 13 24 2 3 12 11 9 I Idler gear (2) (Z=16/54) . 9 11 3 27 6 13 D Delivery gear (Z=26) . Developing drive shaft holder Door lock claw . [. . . ]