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Sony UP895 Service Manual - Page 59

Rear Chassis Block, A-8323-916-A o MOUNTED CIRCUIT BOARD, SE-531

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PS 3x6 Rear Chassis Block 309 317 319 324 310 316 320 311 BVTT 3x6 318 BVTT 3x6 324 314 315 322 320 324 321 317 309 PS 3x6 313 301 BVTT 3x6 TO MA-99 BOARD CN2 BVTT 3x6 BVTT 3x6 323 306 308 312 TO MA-99 BOARD CN7 303 307 302 304 305 TO MA-99 BOARD CN8 No. Part No. SP Description 301 A-8323-916-A o MOUNTED CIRCUIT BOARD, SE-531 302 X-3605-682-1 s MOTOR ASSY 303 1-541-309-11 s MOTOR,(RF-370C)(DC)(2.59W) 304 1-676-696-11 o PRINTED WIRING BOARD, SU-52 305 1-698-928-22 s MOTOR, STEPPING 306 1-960-220-11 o HARNESS, SUB (6P) 307 1-960-222-11 o HARNESS, SUB (2P) 308 3-613-740-01 s SPRING,HELICAL TORSION A 309 3-613-781-01 s COVER,CENTER SHAFT 310 3-623-868-01 o COVER,GEAR UP-895/(E) No. Part No. SP Description 311 3-623-886-02 o CHASSIS,REAR 312 3-623-910-01 s LEVER,DOOR SENSOR 313 3-623-922-01 o COVER,FULCRUM PLATE 314 3-623-925-02 s GEAR,HEAD DRIVE 315 3-623-926-02 s PULLY,HEAD DRIVE 316 3-623-927-01 s CAM,PRESS ROLLER 317 3-623-928-02 s CAM,HEAD 318 3-623-929-01 o SHAFT,DRIVE GEAR 319 3-623-930-01 o SHAFT,HEAD CAM 320 3-623-931-02 s BEARING,REAR(POM) 321 3-623-932-01 s BELT,70TN10-3.5(PUR) 322 3-623-933-01 s FIN,HEAD SENSOR 323 3-683-773-04 s GEAR,PAPER MOTOR 324 3-703-357-07 s PIN PARALLEL (1.6X10) (STEEL) 8-5

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

Match case Limit results 1 per page

8-5

UP-895/(E)

MA-99 BOARD

CN2

MA-99 BOARD

CN7

MA-99 BOARD

CN8

BVTT 3

BVTT

PS 3

320

324

320

321

301

306

308

312

307

304

302

303

323

305

313

311

314

318

315

310

322

317

309

317

319

316

Rear Chassis Block

301

A-8323-916-A o MOUNTED CIRCUIT BOARD, SE-531

302

X-3605-682-1 s MOTOR ASSY

303

1-541-309-11 s MOTOR,(RF-370C)(DC)(2.59W)

304

1-676-696-11 o PRINTED WIRING BOARD, SU-52

305

1-698-928-22 s MOTOR, STEPPING

306

1-960-220-11 o HARNESS, SUB (6P)

307

1-960-222-11 o HARNESS, SUB (2P)

308

3-613-740-01 s SPRING,HELICAL TORSION A

309

3-613-781-01 s COVER,CENTER SHAFT

310

3-623-868-01 o COVER,GEAR

No.

Part No.

SP Description

No.

Part No.

SP Description

311

3-623-886-02 o CHASSIS,REAR

312

3-623-910-01 s LEVER,DOOR SENSOR

313

3-623-922-01 o COVER,FULCRUM PLATE

314

3-623-925-02 s GEAR,HEAD DRIVE

315

3-623-926-02 s PULLY,HEAD DRIVE

316

3-623-927-01 s CAM,PRESS ROLLER

317

3-623-928-02 s CAM,HEAD

318

3-623-929-01 o SHAFT,DRIVE GEAR

319

3-623-930-01 o SHAFT,HEAD CAM

320

3-623-931-02 s BEARING,REAR(POM)

321

3-623-932-01 s BELT,70TN10-3.5(PUR)

322

3-623-933-01 s FIN,HEAD SENSOR

323

3-683-773-04 s GEAR,PAPER MOTOR

324

3-703-357-07 s PIN PARALLEL (1.6X10)

(STEEL)