R51
40672201TH Rev. 4
A3 - 4
A3.1.3
R51 Circuit Diagram (Page 3/12)
1.
Block diagram
The audio monitor circuit on page 3/12 that consists of IC11 (analog switch IC) and IC5
(amplifier) generates the following audio monitor.
•
Line monitoring
•
Buzzer signals
Figure A3.1.3 shows the block diagram of audio monitor circuit.
2.
Function
1)
Line monitoring
Send and receive signals are input from the transformer on the NCU board to this
circuit as a R signal and the signal power is input to the IC11. The IC11 adjusts
the monitor volume by MONC0, MONC1 and MONC2 signal under the control of
IOGA4. Output (high and low) from IC11 passes through the amplifier and is fed to
the speaker as a SP signal.
* MONC0/MONC1/MONC2 signal: Volume control signal.
Note: In case of transmission mode, the monitor will be available during dialing,
but the monitor will be switched off automatically after the elapse of specified
time (about 5 sec).
2)
Buzzer control
Alarm and other signals are input from IOGA4 to this circuit as BZ signals. The
various buzzer signals are sounded under the control of IOGA4 (CPU).
Figure A3.1.3 Block Diagram of Audio Monitor Circuit
IC11
IC2
IOGA4
IOGA4
RM
From MODEM
circuit
Analog
switch
IC5
Amplifier
CN9
1
2
Speaker
BZ
MONC1
MONC2
MONC0
0 V
0 VA
+5 V
0 VA
TR513
IC2
Summary of Contents for OKIOFFICE84
Page 7: ...40672201TH Rev 4 CHAPTER 1 GENERAL INFORMATION...
Page 44: ...40672201TH Rev 4 CHAPTER 2 INSTALLATION PROCEDURE...
Page 120: ...40672201TH Rev 4 CHAPTER 3 BRIEF TECHNICAL DESCRIPTION...
Page 128: ...40672201TH Rev 4 CHAPTER 4 MECHANICAL DISASSEMBLY AND REASSEMBLY...
Page 133: ...4 5 40672201TH Rev 4 Appearance of the OKIOFFICE84 OKIFAX 4500 FX051 CP4 Fig 01...
Page 155: ...40672201TH Rev 4 CHAPTER 5 ADJUSTMENTS...
Page 159: ...40672201TH Rev 4 CHAPTER 6 CLEANING AND MAINTENANCE...
Page 187: ...40672201TH Rev 4 CHAPTER 7 TROUBLESHOOTING AND REPAIR FOR OKIOFFICE84 OKIFAX 4500...
Page 232: ...40672201TH Rev 4 CHAPTER 8 DIPSWITCHS SETTING TABLES...
Page 255: ...40672201TH Rev 4...
Page 313: ...40672201TH Rev 4...
Page 334: ...C 3 40672201TH Rev 4...
Page 335: ...40672201TH Rev 4 C 4...
Page 336: ...C 5 40672201TH Rev 4...
Page 337: ...40672201TH Rev 4 C 6 Reading...
Page 338: ...C 7 40672201TH Rev 4...
Page 339: ...40672201TH Rev 4 C 8...
Page 340: ...C 9 40672201TH Rev 4...
Page 341: ...40672201TH Rev 4 C 10...
Page 342: ...C 11 40672201TH Rev 4...
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Page 344: ...C 13 40672201TH Rev 4...
Page 345: ...40672201TH Rev 4 C 14...
Page 353: ...40672201TH Rev 4 C 22...
Page 354: ...C 23 40672201TH Rev 4...
Page 357: ...40672201TH Rev 4 C 26 Low Voltage Low Voltage High Voltage High Voltage...
Page 358: ...C 27 40672201TH Rev 4...
Page 361: ...40672201TH Rev 4 C 30 Low Voltage secondary High Voltage primary...
Page 365: ...40672201TH Rev 4 C 34 Low Voltage secondary High Voltage primary...
Page 370: ...C 39 40672201TH Rev 4 High Voltage primary Low Voltage secondary...
Page 383: ...40672201TH Rev 4 C 52...
Page 387: ...40672201TH Rev 4 C 56...
Page 390: ...40672201TH Rev 4...
Page 393: ...OKIOFFICE84 OKIFAX 4500 40672201TH Rev 4 D 2 SECTION 1 CABINET ASSEMBLY FAX NIP FX051...
Page 396: ...OKIOFFICE84 OKIFAX 4500 D 5 40672201TH Rev 4 SECTION 2 UNIT PRINTER...
Page 398: ...OKIOFFICE84 OKIFAX 4500 D 7 40672201TH Rev 4 SECTION 3 UNIT 051 OPE PANEL...
Page 400: ...OKIOFFICE84 OKIFAX 4500 D 9 40672201TH Rev 4 SECTION 4 OPEPANEL OPERATION PANEL ASSEMBLY...
Page 402: ...OKIOFFICE84 OKIFAX 4500 D 11 40672201TH Rev 4 SECTION 5 FRAME ASSEMBLY SCANNER L...
Page 404: ...OKIOFFICE84 OKIFAX 4500 D 13 40672201TH Rev 4 SECTION 6 PLATE ASSEMBLY SCANNER B...
Page 406: ...OKIOFFICE84 OKIFAX 4500 D 15 40672201TH Rev 4 SECTION 7 PLATE ASSEMBLY SCANNER R...
Page 408: ...OKIOFFICE84 OKIFAX 4500 D 17 40672201TH Rev 4 SECTION 8 FRAME ASSEMBLY SCANNER U...
Page 410: ...OKIOFFICE84 OKIFAX 4500 D 19 40672201TH Rev 4 SECTION 9 COVER ASSEMBLY TOP...
Page 412: ...OKIOFFICE84 OKIFAX 4500 D 21 40672201TH Rev 4 SECTION 10 PLATE ASSEMBLY BASE...
Page 414: ...OKIOFFICE84 OKIFAX 4500 D 23 40672201TH Rev 4 SECTION 11 PRINTER BASE FRAME UNIT Heat assy...
Page 417: ...OKIOFFICE84 OKIFAX 4500 40672201TH Rev 4 D 26 SECTION 12 PRINTER HEAT ASSY...
Page 419: ...OKIOFFICE84 OKIFAX 4500 40672201TH Rev 4 D 28 SECTION 13 CABLES...
Page 422: ...40672201TH Rev 4...
Page 424: ...E 1 40672201TH Rev 4...
Page 425: ...40672201TH Rev 4 E 2...
Page 426: ...E 3 40672201TH Rev 4...
Page 427: ...40672201TH Rev 4 E 4...
Page 428: ...E 5 40672201TH Rev 4...
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Page 430: ...E 7 40672201TH Rev 4...
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Page 432: ...E 9 40672201TH Rev 4...
Page 433: ...40672201TH Rev 4 E 10...
Page 434: ...E 11 40672201TH Rev 4...
Page 435: ...40672201TH Rev 4 Appendix F PC Loading Second Edition December 1998 Oki Data Corporation...
Page 436: ...40672201TH Rev 4 FX 051 SYSTEM SPECIFICATION PC LOADING PART Ver 00 11 Oki Data Confidential...
Page 473: ...40672201TH Rev 4 H 18 Figure 2 1 IC16 Pin 77 IC16 Pin 78 IC16 Pin 79 IC16 Pin 80...
Page 481: ...40672201TH Rev 4 Appendix I FAX2NET FUNCTION First Edition October 1999 Oki Data Corporation...