Page: 152
Service Guide OF2200/2400/2600
Chapter A Board Diagrams
A.2.01 Main Control Board (MCNT-250) Okifax 2200
Function
The main control board contains an IC that provides voice answering in the TEL/FAX Mode in accordance
with the INPUT/OUTPUT Gate Array and the microprocessor. This board converts parallel send data to
serial data, converts serial receive data to parallel data, modulates/demodulates data, and generates
multi-frequency signals for tone dialing. It amplifies signals and sends the amplified signals to a speaker.
The main control board houses an 8 MHz Microprocessor, static RAM, ENCODER/DECODER, and a
modem IC. This board also monitors the status of the PC1, PC2, and B4 photosensors.
Firmware
ROM: 512 Kbytes
Contains Print Control Program
Location on board designated by "ROM"
Fuses
NONE
Jumpers
NONE
Sensors
NONE
Switches
SW1
Used to modify the LED Head Drive Time.
Test Points
CN 5 Pin 1: GROUND
CN 5 Pin 13: +5 vdc
CN 5 Pin 14: +12 vdc
CN 5 Pin 15: -12 vdc
CN 12 Pin 2, 5, 8, 11: +5 vdc
Summary of Contents for OF2200
Page 87: ...Partner Exchange BPX for any updates to this material http bpx okidata com...
Page 255: ...Page 151 Service Guide OF2200 2400 2600 Chapter A Board Diagrams A 2 INDEX TO CHARTS...
Page 256: ......
Page 259: ......
Page 262: ......
Page 265: ......
Page 268: ......
Page 273: ......
Page 276: ......
Page 279: ......
Page 284: ...Partner Exchange BPX for any updates to this material http bpx okidata com...
Page 285: ...Page 162 Service Guide OF2200 2400 2600 Chapter A Board Diagrams Okifax 2200 1 of 5...
Page 286: ......
Page 288: ...Page 163 Service Guide OF2200 2400 2600 Chapter A Board Diagrams Okifax 2200 2 of 5...
Page 289: ......
Page 291: ...Page 164 Service Guide OF2200 2400 2600 Chapter A Board Diagrams Okifax 2200 3 of 5...
Page 292: ......
Page 297: ......
Page 299: ...Page 168 Service Guide OF2200 2400 2600 Chapter A Board Diagrams Okifax 2400 2600 2 of 6...
Page 300: ......
Page 302: ...Page 169 Service Guide OF2200 2400 2600 Chapter A Board Diagrams Okifax 2400 2600 3 of 6...
Page 303: ......
Page 307: ...Page 172 Service Guide OF2200 2400 2600 Chapter A Board Diagrams Okifax 2400 2600 6 of 6...
Page 308: ......
Page 317: ......
Page 320: ......
Page 323: ......
Page 326: ......
Page 329: ......
Page 333: ......
Page 337: ......
Page 340: ......
Page 344: ......
Page 348: ......
Page 352: ......
Page 355: ......
Page 359: ......
Page 363: ......
Page 367: ......
Page 371: ......
Page 374: ......
Page 380: ......
Page 387: ...Page 199 Service Guide OF2200 2400 2600 Chapter B Illustrated Parts...
Page 389: ...Page 200 Service Guide OF2200 2400 2600 Chapter B Illustrated Parts...
Page 391: ...Page 201 Service Guide OF2200 2400 2600 Chapter B Illustrated Parts...
Page 395: ...Page 202 Service Guide OF2200 2400 2600 Chapter B Illustrated Parts UST500...