Sony UP895 Service Manual - Page 62

8-8

UP-895/(E)

(MA-99 BOARD)

Ref. No.

or Q'ty

Part No.

SP Description

C211

1-164-156-11 s CAPACITOR,CERAMIC 0.1MF/25V F

C220

1-127-675-11 s CAPACITOR,CHIP CERAMIC 22MF B

C221

1-126-964-11 s CAPACITOR, ELECT 10MF/50V

C222

1-162-970-11 s CAPACITOR CERAMIC 0.01MF/25V B

C223

1-162-966-11 s CAPACITOR,CERAMIC 2200PF/50V B

C224


C225


C226


C235

1-126-962-11 s CAP,ELECT 3.3MF/50V

C300


C301


C302


C303


C304


C305


C306

1-162-916-11 s CAPACITOR,CERAMIC 12PF/50V CH

C307


C310


C311


C312


C313


C314


C315


C316


C317


C318


C319


C320


C321


C322


C323


C324


C325


C326


C327

1-125-817-11 s CAPACITOR, CERAMIC 10MF/6.3V

C328


C329


C330


C331


C332


C333


C334


C335


C336


C337


C338


C339


C340


C341


C350


C351


C352

1-164-227-11 s CAPACITOR,CERAMIC 0.022MF/25V

C360


C361


C362


C401


C403


C404


C405

1-164-227-11 s CAPACITOR,CERAMIC 0.022MF/25V

(MA-99 BOARD)

Ref. No.

or Q'ty

Part No.

SP Description

C406


C407


C409


C431


C432


C433


C500


C501


C502


C503


C504


C505


C506


C507


C508


C509


C510


C511


C512


C513


C514


C515


C516


C517


C518


C519


C520


C521


C522


C523


C524


C525


C526


C527


C528


C529


C530


C531


C532


C533


C535


C536


C537


C539


C540


C541


C542


C543


C544


C545


C548


CN1

1-695-408-11 s SOCKET, CONNECTOR FPC (11P)

CN2

1-506-472-11 s PIN,CONNECTOR 7P

CN3

1-751-022-11 s SOCKET, CONNECTOR 8P (FPC)

CN5

1-564-005-11 o PIN, CONNECTOR 6P

CN6

1-770-469-21 o PIN, CONNECTOR (PC BOARD) 2P

CN7

1-564-002-11 s PIN, CONNECTOR 3P

CN8

1-564-005-11 o PIN, CONNECTOR 6P

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 62

S Capacitor, Chip Ceramic 22mf B, Ceramic 12pf/50v Ch

Page 62 highlights