Sony UP895 Service Manual - Page 64

8-10

UP-895/(E)

(MA-99 BOARD)

Ref. No.

or Q'ty

Part No.

SP Description

Q50

8-729-402-81 s TRANSISTOR XN4501

Q51

8-729-216-22 s TRANSISTOR 2SA1162-G

Q52


Q54


Q173

8-729-035-96 s TRANSISTOR XN4402-(TX)

Q174

8-729-035-96 s TRANSISTOR XN4402-(TX)

Q200

8-729-140-75 s TRANSISTOR 2SD999-CLOCK

Q220

8-729-402-81 s TRANSISTOR XN4501

Q221

8-729-120-28 s TRANSISTOR 2SC1623-L5L6

Q300

8-729-901-00 s TRANSISTOR DTC124EK

Q301

8-729-901-00 s TRANSISTOR DTC124EK

Q400


Q401

8-729-120-28 s TRANSISTOR 2SC1623-L5L6

Q402


Q403

8-729-017-80 s TRANSISTOR 2SD992-Z

Q404


Q405


Q406


Q407


R1

1-216-811-11 s RESISTOR, CHIP 150 1/16W 1608

R2

1-216-811-11 s RESISTOR, CHIP 150 1/16W 1608

R4

1-216-829-11 s RESISTOR, CHIP 4.7K 1/16W 1608

R5

1-216-831-11 s RESISTOR,CHIP 6.8K 1/16W(1608)

R6

1-216-834-11 s RESISTOR,CHIP 12K 1/16W 1608

R7

1-216-809-11 s RESISTOR,CHIP 100 1/16W 1608

R8


R9


R18

1-216-809-11 s RESISTOR,CHIP 100 1/16W 1608

R19

1-216-803-11 s RESISTOR,CHIP 33 1/16W 1608

R21


R22

1-216-809-11 s RESISTOR,CHIP 100 1/16W 1608

R23


R24

1-216-819-11 s RESISTOR,CHIP 680 1/16W 1608

R25


R26


R30

1-216-812-11 s RESISTOR,CHIP 180 1/16W 1608

R31

1-216-825-11 s RESISTOR,CHIP 2.2K 1/16W 1608

R32


R33

1-216-812-11 s RESISTOR,CHIP 180 1/16W 1608

R34

1-216-817-11 s RESISTOR,CHIP 470 1/16W 1608

R35


R36


R37

1-216-803-11 s RESISTOR,CHIP 33 1/16W 1608

R38


R39

1-216-819-11 s RESISTOR,CHIP 680 1/16W 1608

R40

1-216-815-11 s RESISTOR,CHIP 330 1/16W 1608

R41

1-216-811-11 s RESISTOR, CHIP 150 1/16W 1608

R42

1-216-811-11 s RESISTOR, CHIP 150 1/16W 1608

R43


R53

1-216-803-11 s RESISTOR,CHIP 33 1/16W 1608

R56


R57


R58


R59


R60

1-216-856-11 s RESISTOR, CHIP 820K 1/16W 1608

R61

1-218-871-11 s RESISTOR,CHIP 10K 1/16W (1608)

R62


R63

1-216-803-11 s RESISTOR,CHIP 33 1/16W 1608

R64


(MA-99 BOARD)

Ref. No.

or Q'ty

Part No.

SP Description

R65


R66


R67


R68


R69


R70


R71


R72


R74

1-216-845-11 s RESISTOR,CHIP 100K 1/16W(1608)

R75


R76


R97

1-216-813-11 s RESISTOR, CHIP 220 1/16W 1608

R98

1-216-813-11 s RESISTOR, CHIP 220 1/16W 1608

R101


R103


R104


R123

1-218-845-11 s RESISTOR,CHIP 820 1/16W (1608)

R124

1-218-847-11 s RESISTOR, CHIP 1K 1/16W (1608)

R125

1-218-833-11 s RESISTOR,CHIP 270 1/16W (1608)

R127

1-216-864-11 s RESISTOR,CHIP 0 1/16W (1608)

R128

1-216-864-11 s RESISTOR,CHIP 0 1/16W (1608)

R130


R131

1-216-817-11 s RESISTOR,CHIP 470 1/16W 1608

R132

1-216-818-11 s RESISTOR, CHIP 560 1/16W 1608

R133


R150


R155


R156


R157


R158

1-216-815-11 s RESISTOR,CHIP 330 1/16W 1608

R159

1-216-823-11 s RESISTOR, CHIP 1.5K 1/16W

R160


R161


R162


R163


R164


R167

1-216-815-11 s RESISTOR,CHIP 330 1/16W 1608

R168


R173

1-216-803-11 s RESISTOR,CHIP 33 1/16W 1608

R174


R175


R176


R177

1-216-295-91 s RESISTOR, CHIP 0 (1/10W)

R180

1-414-760-21 s INDUCTOR, MICRO (CHIP TYPE)

R181

1-216-864-11 s RESISTOR,CHIP 0 1/16W (1608)

R200

1-216-343-00 s RESISTOR,METAL FILM 0.33/1W

R220


R221


R222

1-216-856-11 s RESISTOR, CHIP 820K 1/16W 1608

R223


R224


R225


R226


R227


R228

1-216-803-11 s RESISTOR,CHIP 33 1/16W 1608

R229


R230


R231


R232

1-216-819-11 s RESISTOR,CHIP 680 1/16W 1608

Section	Page
Cover	1
Table of Contents	3
1.Operating Instructions	7
2.Service Information	17
2-1. Board Layout	17
2-2. Disassembly	17
2-3. Removal of Major Parts	18
2-3-1. Removal of Mechanical Block	18
2-3-2. Removal of MA-99 Board	19
2-3-3. Removal of Switching Regulator	19
2-3-4. Removal of Thermal Head	20
2-4. Tightening the Screws	21
2-5. Installation of Fan Motor	22
3.Electrical Alignment	23
3-1. AGC Adjustment	23
3-2. Video Level Adjustment	23
3-3. Brightness and Contrast Adjustment	24
3-4. Head Voltage Adjustment	25
3-5. Initialization of Print Count History	25
4.Circuit Operation Description	27
4-1. Video Circuit	29
4-1-1. BNC Input Connector - Trap Filter Circuit	29
4-1-2. nC-SYNC Generator Circuit	29
4-1-3. AGC Circuit	29
4-1-4. Brightness and Contrast Control	29
4-1-5. A/D Conversion and D/A Conversion	29
4-2. Clock Generator Circuit	30
4-3. Memory and Head Control Circuit	30
4-3-1. Reading the Serial Data from System Control	31
4-3-2. Writing in Frame Memory	31
4-3-3. Transfer from Frame Memory to Line Memory	31
4-3-4. Thermal Head Control and One-Line Memory	31
4-4. System Control Section	34
4-4-1. Reading of Keys	34
4-4-2. Reading of Function Switches	34
4-4-3. Platen Motor Control	35
4-4-4. Head Up and Down Control	36
4-4-5. Monitor of Door Sensor	36
4-4-6. Monitor of Paper Sensor	36
4-4-7. Monitor of Head Temperature Sensor	37
4-4-8. Control of Head Fan Motor (for Head Cooling)	37
4-4-9. Control of Video Circuit Section	37
4-4-10. Control of Memory and Head Control Circuit	38
4-4-11. Gamma Correction and Thermal Storage Correction	39
4-4-12. Discrimination of Video Signal to be Input	39
4-4-13. Remote Interface	39
4-4-14. Storage of Print Count History	39
4-5. Thermal Head Section	40
4-5-1. Structure	40
4-5-2. Basic Operation	41
4-5-3. Stair Generation	41
4-5-4. Temperature Correction	42
4-5-5. Line Count Correction	42
5.Troubleshooting	43
5-1. Print is Faulty	43
5-2. Print is Too Dark or Too Light	44
5-3. “Paper Sensor” is Out of Order	45
5-4. Head Operation (Up & Down) is Out of Order	46
5-5. Paper Feeding is Out of Order	47
5-6. Door (Opening and Closing) is Out of Order	48
6.Service Mode (Self-diagnostic Function)	49
6-1 Printing the Test Pattern	49
6-2. Up/Down Operation of Head	50
6-3. Feed Operation	50
6-4. Display and Clearing of Print Sheet History	51
7.Semiconductor Pin Assignments	53
8.Spare Parts	55
8-1. Notes on Repair Parts	55
8-2. Exploded Views	56
8-3. Electrical Parts List	61
9.Block Diagram	69
Overall	69
10.Schematic Diagrams and Board Layouts	71
Frame	72
KY-454	73
SE-531	73
SE-532	73
SU-52	73

Sony UP895 Service Manual - Page 64

S Resistor, Chip 820k 1/16w 1608

Page 64 highlights