Oki OKIOFFICE44 Service Manual page 8

Appendix A: Board Descriptions ........................................................... A - 1
PREFACE ....................................................................................................................................... A - 1
Service Caution .................................................................................................................. A - 1
A1.1 Unit Configuration and Block Diagram ............................................................................. A - 3
OKI OFFICE44 Block Diagram Figure (A1.2.1) ............................................................... A - 4
Block Diagram Abbreviations ............................................................................................ A - 5
A1.2 Function of Each Unit ........................................................................................................ A - 6
Main Control (R44) Board ................................................................................................ A - 6
Operation Panel Unit: O4W Board .................................................................................... A - 6
NCU Board (UNC5) ........................................................................................................... A - 7
Power Supply Unit ............................................................................................................. A - 7
Memory Board (Option) ..................................................................................................... A - 7
CTR Board (PC Interface) .................................................................................................. A - 7
HOOK Board (Option) ....................................................................................................... A - 7
TELU Board (Option) ........................................................................................................ A - 7
A2.1 Signal Flow Explanation .................................................................................................... A - 8
Copy Mode ......................................................................................................................... A - 8
Copy Picture Signal (Figure A2.1.1) .................................................................................. A - 9
G3 Send Mode .................................................................................................................. A - 10
G3 Send Picture Signal (Figure A2.1.2) ........................................................................... A - 11
G3 Receive Mode ............................................................................................................. A - 12
G3 Receive Picture Signal (Figure A2.1.3) ...................................................................... A - 13
300 bps Send Mode .......................................................................................................... A - 14
300 bps Send Signal (Figure A2.1.4 ) ............................................................................... A - 15
300 bps Receive Mode ..................................................................................................... A - 16
300 bps Receive Signal (Figure A2.1.5) ........................................................................... A - 17
Report Printing ................................................................................................................. A - 18
Report Print Signal (Figure A2.1.6) ................................................................................. A - 19
Memory Transmission ...................................................................................................... A - 20
Memory Reception .......................................................................................................... A - 20
A3.3 OPE (04W) Circuit Diagram ............................................................................................ A - 42
A3.5 Power Supply Unit for OKIOFFICE 44 ........................................................................... A - 44
A3.5.1 048 POW (120V/230V) Circuit Diagram ............................................................. A - 44
Block Diagram of 048 POW (Figure A3.5.1) ................................................................... A - 46
Service Caution .................................................................................................... A - 47
A3.5.2 OLHV/TLHV Circuit Diagram (2/2) ................................................................... A - 47
A3.7 UNC5 (NCU) Circuit Diagram......................................................................................... A - 51
Block Diagram of UNC (Figure A3.7.1) .......................................................................... A - 53
A3.8 TELU Circuit Diagram (Option) ...................................................................................... A - 54
Block Diagram of TEL-U (Option) Fig. A3.8.1 ............................................................... A - 55
A3.10 MEMO (Memory) Circuit Diagram (Option) .................................................................. A - 56
Related Signals of Memory Board (Option) (Figure A3.10.1) ......................................... A - 57
Table of Contents TOC - 6 OKIOFFICE 44
Service Manual, P/N 59276801