Sharp SF-1014 Service Manual Page 114
- Page / 153
- Table of contents
- BOOKMARKS
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4. Operating section
(1) Outline
The operating circuit is composed of the key matrix circuit and the
display matrix circuit.
Key detection: Keys are detected with signal matrix of W0 (Q25) ∼
W7 (Q32) and KEY0 ∼ KEY2.
With W0 signal at LOW (GND) and W1 ∼ W7 at HIGH (open), the
level of KEY0 ∼ KEY2 is checked and "H" or "L" state of 4K, 2K and
3K in the key matrix is judged to judge ON/OFF.
For W1 ∼ W7, switching is made every 2 msec for judgement.
W0
W1
W2
W3
W4
W5
W6
W7
KEY0
KEY0
HIGH
GND
2m sec
16m sec
4K-ON
4K-OFF
KEY0
KEY1
KEY2
3K2K4K
W0 (Q25)
LC7935
+5V2 +5V1
CPU
12 – 11
- SERVICE MANUAL 1
- MODEL SF-1014 1
- CONTENTS 2
- [1] GENERAL DESCRIPTION 4
- [2] PRODUCT SPECIFICATIONS 5
- Middle and South America 7
- Lower unit 9
- 2 3 5 6 7 8 9 10 11 12 13 14 10
- 3. Cross section 11
- 5. Clutches, solenoids 13
- 6. Motors 14
- 1. Packing drawing 16
- 2. Installation 16
- (2) Space around the machine 17
- (3) Installing table 17
- (4) Power source 17
- (5) Grounding 17
- Mirror unit fixing screw 18
- Toner cartridge 19
- Release lever (B) 19
- (4) Toner supply 20
- (6) Accessory attachment 20
- Installation Manual 21
- Multi bypass feeder unit 22
- [5] GENERAL DESCRIPTIONS OF 23
- EACH SECTION 23
- 3. Fuser, paper exit section 24
- 4. Developer section 24
- 5. Optical system 25
- 5-2. Basic operations 26
- 6. Copy process 28
- Cleaning blade 29
- Transfer corona unit 29
- Step 3 (Main Charging) 30
- Step 4 (Exposure) 30
- Step 5 (Development) 31
- Step 6 (Transfer) 32
- Step 7 (Separation) 32
- Step 8 (Cleaning) 33
- Step 9 (Discharging) 33
- (5) Process correction system 34
- 2) Correction operation 34
- [Initial setting] 35
- [Correction timing] 35
- [Correction operation] 35
- [6] DISASSEMBLY AND ASSEMBLY 36
- 1-3. Separation roller 37
- One-way clutch side 38
- 1-6. Transport belt 39
- 1-7. Socket holder unit 39
- 1-8. Lower unit PWB 39
- 1-10. Power unit 39
- 2. Manual paper feed section 40
- 3. Fuser section 41
- Paper exit paper guide 43
- 4. Optical system 44
- Wire fixing screw 44
- 4-6. Optical unit removal 46
- 5. Drum section 48
- 6. Developer section 48
- 6-4. Toner density sensor 49
- 8-1. Ozone filter 49
- 8-4. Transport roller clutch 50
- 8-5. Paper exit sensor 50
- 8-3. Ventilation fan motor 50
- [7] ADJUSTMENTS 51
- 0.625±0.03mm 52
- 2. Optical section 53
- Optical unit cover 56
- Optical unit 56
- Document Copy A Copy B 57
- Cam fixing screw 58
- Do not move 58
- Scanner unit drive pulley 59
- Set screw 59
- No.2 scanner unit 60
- Positioning plate 60
- Document Copy C Copy D 61
- Change the right side 62
- Change the left side 62
- Copy paper 63
- No.4/5 mirror drive lever 64
- No.4/5 mirror unit frame 64
- Copy image size 66
- Original size 66
- Shizuoka 67
- Paper exit 68
- Half-tone copy 68
- Less exposure 68
- (Dark copy) 68
- Scale image lead edge 69
- Enlargement copy (x 1.54) 69
- 10 20 30 70
- current void area (mm) 71
- 3. COPY DENSITY ADJUSTMENT 73
- Not copied 74
- adjustment 75
- Slightly copied 76
- Tension spring 77
- [8] SIMULATIONS 78
- 4. Purpose list 79
- 5. Details of simulations 80
- EXP1~5 voltage 87
- Full power 87
- 6. User simulation 89
- (2) User simulation prcedure 90
- (3) User program code table 90
- [9] SELF DIAG 91
- 4. Self diag contents 92
- 1) Paper feed section 97
- 2) Transport section 97
- [10] SERVICING AT MEMORY 98
- TROUBLE AND MAIN 98
- CONTROL PWB REPLACEMENT 98
- 4. Set value recording sheet 101
- 5. Memory simulation list 102
- [11] MAINTENANCE 103
- [12] ELECTRICAL SECTION 104
- M37702M2-XXXFP 105
- 3 Block diagram 106
- IN XIN IN Clock IN 107
- OUT XOUT OUT Clock OUT 107
- H=+32V, VB=+24V 108
- 1 General 109
- Stepping motor time chart 110
- (9) Reset IC (IC113) 111
- 1 Outline 111
- 2 Operation 111
- V3' 112
- (1) Outline 114
- (2) Display circuit 115
- 1 Block diagram 115
- (3) LED display 116
- • AC PWB unit 116
- • In the main PWB unit 117
- COPYRIGHT 119
- 1997 BY SHARP CORPORATION 119
- SF-1014 120
- DEFINITION 121
- FCP02601 123
- FCP02602 124
- NO. PARTS CODE 125
- DESCRIPTION 125
- – 6 – – 7 – 126
- – 8 – – 9 – 127
- – 10 – – 11 – 128
- FCP02605 129
- – 18 – – 19 – 130
- – 22 – – 23 – 132
- FCP02616 137
- FCP02617 142
- PARTS CODE NO 147
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