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Illustration: UX-178
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications ............................................ 1-1
[2] Operation panel ......................................... 1-2
[3] Transmittable documents .......................... 1-3
[4] Installation ................................................. 1-4
[5] Quick reference guide ............................... 1-7
CHAPTER 2. ADJUSTMENTS
[1] Adjustments ............................................... 2-1
[2] Diagnostics and service soft switch .......... 2-2
[3] Troubleshooting ...................................... 2-16
[4] Error code table ....................................... 2-17
CHAPTER 3. MECHANISM BLOCKS
[1] General description .................................. 3-1
[2] Disassembly and assembly
procedures ....................................... 3-3
CHAPTER 4. DIAGRAMS
[1] Block diagram ............................................4-1
[2] Wiring diagram .......................................... 4-2
[3] Point-to-point diagram ............................... 4-3
Parts marked with "
" is important for maintaining the safety of the set. Be sure to replace these parts with specified ones for
maintaining the safety and performance of the set.
SERVICE MANUAL
CONTENTS
SHARP CORPORATION
1 - 1
FACSIMILE
MODEL
Non Cutter model
FO-175/NX-72
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Circuit description ...................................... 5-1
[2] Circuit description of control PWB ..............5-2
[3] Circuit description of TEL/LIU PWB .......... 5-8
[4] Circuit description of
power supply PWB ............................ 5-11
[5] Circuit description of CIS unit ................... 5-11
CHAPTER 6. CIRCUIT SCHEMATICS AND
PARTS LAYOUT
[1] Control PWB circuit ................................... 6-1
[2] TEL/LIU PWB circuit ................................. 6-9
[3] Power supply PWB circuit ...................... 6-13
[4] Operation panel PWB circuit ................... 6-15
CHAPTER 7. OPERATION FLOWCHART
[1] Protocol ..................................................... 7-1
[2] Power on sequence .................................. 7-2
CHAPTER 8. OTHERS
[1] Service tools .............................................. 8-1
[2] IC signal name .......................................... 8-3
PARTS GUIDE
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
UX-178DE/FO-175DE
NX-76DE/NX-72DE
No. 00ZUX178DESME
UX-178
FO-175
NX-76
NX-72
Cutter model
UX-178/NX-76

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Summary of Contents for Sharp FACSIMILE NX-76

  • Page 1 " is important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set. This document has been published to be used SHARP CORPORATION for after sales service only. The contents are subject to change without notice.
  • Page 2 UX-178DE/FO-175DE NX-76DE/NX-72DE CAUTION FOR BATTERY REPLACEMENT (Danish) ADVARSEL ! Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun ske med batteri af samme fabrikat og type. Levér det brugte batteri tilbage til leverandoren. (English) Caution ! Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the equipment manufacturer.
  • Page 3 Length  140 to 600 mm As a part of our policy of continuous improvement, SHARP reserves the right to make design and specification changes for procduct improvement without prior notice. The performance specifications figures indicated are nominal values of production units. There may be some deviation from these values in individual units.
  • Page 4 UX-178DE/FO-175DE NX-76DE/NX-72DE [2] Operation panel EMPFANGSART FUNKTION AUFLÖ SUNG TEL FAX LEISE LAUTSTÄ RKE LAUT TEL/FAX ANRUFB STOP KURZWAHL KOPIE/HILFE WAHLWDH. WXYZ PQRS ALPHAWAHL START SYMBOLE LAUTSPR. ABRUF 11 12 10. WAHLWDH.(REDIAL key) 1. LCD-Anzeige(Display) Press this key to automatically redial the last number This displays messages and prompts during operation dialed.
  • Page 5 UX-178DE/FO-175DE NX-76DE/NX-72DE 5. Automatic Document Feeder Capacity [3] Transmittable documents Number of pages that can be placed into the feeder at anytime is as 1. Document Sizes follows: Normal size: max. ADF 10 sheets width 148 – 216 mm Normal size Special size: single sheet only (manual feed) length 140 –...
  • Page 6 UX-178DE/FO-175DE NX-76DE/NX-72DE 7. Use of Document Carrier Sheet 2. Connections Connect the handset as shown and place it on the handset rest. A document carrier sheet must be used for the following documents. • ♦ Make sure the handset cord goes into the unmarked jack on the Those with tears.
  • Page 7 UX-178DE/FO-175DE NX-76DE/NX-72DE 3. Original document support Unwrap the roll of fax paper and place it in the compartment. • Important: The roll must be placed so that the leading edge of Rotate the original document support so that it points straight out. the paper unrolls as shown.
  • Page 8 UX-178DE/FO-175DE NX-76DE/NX-72DE 4. Clearing a jammed document Cut off the wrinkled part of the paper. If the original document doesn’t feed properly during transmission or copying, or DOCUMENT JAMMED appears in the display, first try press- ing the START key. If it doesn’t feed out, remove it as follows: Important: Do not try to remove a document without opening the op- eration panel.
  • Page 9 UX-178DE/FO-175DE NX-76DE/NX-72DE [5] Quick reference guide FUNCTION key menu The following chart shows the layout of the functions and settings accessed by pressing the FUNCTION key. First press the FUNCTION key, the appropriate numeric key as shown, and then "#" or " "...
  • Page 10 UX-178DE/FO-175DE NX-76DE/NX-72DE (1) FU100 (ICP-S07) is installed in order to protect IC’s from an over- CHAPTER 2. ADJUSTMENTS current generated in the motor drive circuit. If FU100 is open, replace it with a new one. [1] Adjustments 3. Settings (1) Dial mode selector General DIAL mode (Soft Switch No.
  • Page 11 UX-178DE/FO-175DE NX-76DE/NX-72DE [2] Diagnostics and service soft switch 1. Operating procedure (1) Entering the diagnostic mode Press FUNC → 9 → → 8 → # → 7 , and the following display will appear. ROM Ver. FXP0 (FXA0 ) After 2 sec: DIAG MODE FXP0 (UX-178DE/NX-76DE) FXA0 (FO-175DE/NX-72DE) Then press the START key.
  • Page 12 UX-178DE/FO-175DE NX-76DE/NX-72DE 3. Diagnostic items description 3. 6. Signal send mode 3. 1. Soft switch mode The mode is used to send various signals to the circuit during FAX com- munication. Every push of START key sends a signal in the following Used to change the soft switch settings.
  • Page 13 UX-178DE/FO-175DE NX-76DE/NX-72DE 4. How to make soft switch setting To enter the soft switch mode, make the following key entries in sequence. Press FUNCTION START START DATA No. 1 2 3 4 5 6 7 8 S F T SW-A1 = 0 0 0 0 0 0 0 0 Press FUNCTION key.
  • Page 14 UX-178DE/FO-175DE NX-76DE/NX-72DE 5. Soft switch description • Soft switch Initial setting Switch setting and function DATA ITEM Remarks Protect from echo Forced 4800 BPS reception Footer print Length limitation of No limit Copy/send: 60cm copy/send/receive Receive: 1.5m CSI transmission No transmitted Transmitted DIS receive acknowledgement Twice...
  • Page 15 Disconnect the line when DIS is received in RX mode Equalizer freeze control (MODEM) Equalizer freeze control 7200 BPS only CNG transmission in manual TX mode Initial compression scheme for sharp MR mode H2 mode fax in TX mode Reserved Reserved Reserved Reserved...
  • Page 16 UX-178DE/FO-175DE NX-76DE/NX-72DE Initial setting Switch setting and function DATA ITEM Remarks DTMF signal transmission level Binary input (Low) No. = 16 8 4 2 1 2 3 4 1 0 1 1 1 (0.5x10=-5dBm) Reserved Reserved Reserved DTMF signal transmission level Binary input (High) No.
  • Page 17 UX-178DE/FO-175DE NX-76DE/NX-72DE Initial setting Switch setting and function DATA ITEM Remarks Pseudo ringer sound output level to Binary input the line No. = 8 4 2 1 1 2 3 4 0 1 0 1 (-5dBm -5=-10dBm) 1 (-5 ~ -20dBm setting) Reserved Reserved Reserved...
  • Page 18 UX-178DE/FO-175DE NX-76DE/NX-72DE Initial setting Switch setting and function DATA ITEM Remarks Reserved Reserved Reserved Busy tone continuous sound detect 5 sec 10 sec time Reserved Busy tone detect continuation sound No detect Reserved Busy tone detect intermittent sound detect Busy tone detection pulse number 2pulses 4pulses 6pulses 10pulses No.
  • Page 19 UX-178DE/FO-175DE NX-76DE/NX-72DE Initial setting Switch setting and function DATA ITEM Remarks Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Sender’s phone number setting Cannot change Change allowed Reserved...
  • Page 20 UX-178DE/FO-175DE NX-76DE/NX-72DE Initial setting Switch setting and function DATA ITEM Remarks Entering DIAG mode by pressing SPEED key Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved 2 –...
  • Page 21 UX-178DE/FO-175DE NX-76DE/NX-72DE • Soft switch function description SW-A2 No. 7 Communication error treatment in RTN sending mode (Reception) SW-A1 No. 1 Protect from echo Used to determine communication error treatment when RTN is sent by occurrence of a received image error in G3 reception. When it is set to Used to protect from echo in reception.
  • Page 22 When set to "0", if the other fax is Sharp model, fax transmit the docu- pulse dial mode to the tone dial mode. ment by H2 mode. When set to "1", even if the other fax is Sharp model, fax transmit the document by MR mode.
  • Page 23 UX-178DE/FO-175DE NX-76DE/NX-72DE SW-C1 No. 3, No. 4 Reading slice (Half tone) SW-E1 No. 7 Post answer tone transmit in Tel/Fax mode Used to determine the set value of reading density in half tone mode. When set to "0", machine send the 800 Hz tones in TEL/FAX auto The standard setting is "00"...
  • Page 24 UX-178DE/FO-175DE NX-76DE/NX-72DE SW-G2 No. 1 ~ No. 8 Off hook hold SW-J1 No. 4, No. 5 Reserved Used to set Off hook hold time by binary input. Set to "0". (0 to 255 seconds) SW-J1 No. 6 Summer time setting Used to set YES/NO of automatic clock adjustment for summer time.
  • Page 25 UX-178DE/FO-175DE NX-76DE/NX-72DE [3] Troubleshooting Refer to the following actions to troubleshoot any of problems mentioned • Apply line equalization SOFT SWITCH A5-1, 2. in 1-4. May be used in case [1] [2] [3] [4]. [1] A communication error occurs. • Slow down the transmission speed SOFT SWITCH A2-1, 2, 3, [2] Image distortion produced.
  • Page 26 UX-178DE/FO-175DE NX-76DE/NX-72DE [4] Error code table 1. Communication error code table G3 Transmission Code Final received signal Error Condition (Receiver side) Incomplete signal frame Cannot recognize bit stream after flag NSF, DIS Cannot recognize DCS signal by echo etc. Cannot recognize NSS signal (FIF code etc) Disconnects line during reception (carrier missing etc) Disconnects line by fall back Disconnects line during reception of multi page...
  • Page 27 UX-178DE/FO-175DE NX-76DE/NX-72DE 3-2. Automatic document feed CHAPTER 3. MECHANISM BLOCKS 1) Use of the paper feed roller and separation rubber plate ensures er- ror-free transport and separation of documents. The plate spring [1] General description presses the document to the paper feed roller to assure smooth feed- ing of the document.
  • Page 28 UX-178DE/FO-175DE NX-76DE/NX-72DE 3-5. Documents requiring use of document carrier 5. Recording block 1) Documents smaller than B6 (128mm x 182mm). 5-1. General view 2) Documents thinner than the thickness of 0.06mm. RECORDING BLOCK (NON CUTTER MODEL) 3) Documents containing creases, folds, or curls, especially those whose Scanner frame surface is curled (maximum allowable curl is 5mm).
  • Page 29 UX-178DE/FO-175DE NX-76DE/NX-72DE [2] Disassembly and assembly procedures • This chapter mainly describes the disassembly procedures. For the assembly procedures, reverse the disassembly procedures. • Easy and simple disassembly/assembly procedures of some parts and units are omitted. For disassembly and assembly of such parts and units, refer to the Parts List.
  • Page 30 UX-178DE/FO-175DE NX-76DE/NX-72DE Parts list (Fig. 2) PWB case top, bottom and PWB Part name Q’ty Part name Q’ty Mechanism unit Screw (4×6) Screw (3×6) AC cord ass’y Head earth cable Screw (3×6) Connector TEL ARG cable Screw (3×10) Power supply PWB unit PWB case unit TEL/LIU PWB unit Screw (3×10)
  • Page 31 UX-178DE/FO-175DE NX-76DE/NX-72DE Parts list (Fig. 3) Operation panel unit and scanner frame Part name Q’ty Part name Q’ty Mechanism unit Feed roller Screw (3×10) CIS cable Scanner frame unit CIS support, right Document guide lower CIS unit Reduction gear, 17/36Z CIS support, left Reduction gear, 17/21Z CIS spring...
  • Page 32 UX-178DE/FO-175DE NX-76DE/NX-72DE Parts list (Fig. 4) Document guide upper unit and head Part name Q’ty Part name Q’ty frame Operation panel unit Head support, right Screw (3×10) Screw (3×6) Support plate Head earth cable Document guide upper Head support, left unit Thermal head Screw (3×10)
  • Page 33 UX-178DE/FO-175DE NX-76DE/NX-72DE Parts list (Fig. 5) Document guide upper Part name Q’ty Part name Q’ty Rear sheet Panel lock lever CIS gear, 29Z Document sensor lever CIS roller A ass’y spring Transfer bearing Document sensor lever Separate spring CIS roller B ass’y Separator plate Transfer roller Transfer bearing...
  • Page 34 UX-178DE/FO-175DE NX-76DE/NX-72DE Parts list (Fig. 6) Operation panel Part name Q’ty Part name Q’ty Operation panel unit Hopper spring Screw (2×6) Hopper guide, right Operation panel cable Hopper guide, left Operation panel PWB Stop key Start key Document tray Direct key Screw Pinion gear 12 key...
  • Page 35 UX-178DE/FO-175DE NX-76DE/NX-72DE Parts list (Fig. 7) Drive unit, PWB and cutter Part name Q’ty Part name Q’ty Mechanism unit Cutter unit Screw (3×10) (Cutter model only) (Cutter model) Screw (3×10) Screw (3×10) (Cutter model only) Cutter cover (Non cutter model) Cutter arm (Cutter model only) (Cutter model only)
  • Page 36 UX-178DE/FO-175DE NX-76DE/NX-72DE Parts list (Fig. 8) Speaker, paper sensor lever and paper guide upper Part name Q’ty Mechanism unit Paper sensor lever spring (Cutter model only) Paper sensor lever (Cutter model only) Screw Speaker spacer Speaker Paper guide upper (Non Cutter model only) Hook Hook Fig.
  • Page 37 UX-178DE/FO-175DE NX-76DE/NX-72DE Parts list (Fig. 9) Drive frame (Non cutter model) Part name Q’ty Part name Q’ty Change lever spring Planet gear lever B Planet gear, 17Z Idler gear, 25Z Change lever A Cam switch Reduction gear, 17Z Idler gear, 25Z Reduction gear, 17/36Z Screw (3×10) Planet gear, 17Z...
  • Page 38 UX-178DE/FO-175DE NX-76DE/NX-72DE Drive frame (Cutter model) Parts list (Fig. 10) Part name Q’ty Part name Q’ty Part name Q’ty Cutter cam switch Planet gear, 17Z Reduction gear, 17/36Z Planet gear, 17Z Planet gear spring Idler gear, 25Z Planet gear spring Planet gear lever A Idler gear, 25Z Planet gear lever C...
  • Page 39 UX-178DE/FO-175DE NX-76DE/NX-72DE Parts list (Fig. 11) Wire treatment Part name Q’ty Band Screw (3×6) Screw (4×6) UL tape Core (F2064) Core (F2063) Band (100mm) Fixed this switch after adjusting the Control PWB cutter gear in this drawing, (Cutter model only) Speaker Cutter cable Speaker cable...
  • Page 40 UX-178DE/FO-175DE NX-76DE/NX-72DE CHAPTER 4. DIAGRAMS 4 – 1...
  • Page 41 [2] Wiring diagram HANDSET CAM SW TX/RX MOTOR UX-178DE/NX-76DE ONLY CUTTER SENSOR CNHJ TEL/LIU EXTERNAL LINE PWB UNIT CNLNJ TEL LINE CNCUT1 CNMT CNCSW THERMAL HEAD CNLIUA CNLIUA CNTH CNLIUB CNLIUB CONTACT IMAGE SENSOR CONTROL PWB UNIT CNCIS CNPW LCD UNIT POWER SUPPLY CNPN CNSP...
  • Page 42 UX-178DE/FO-175DE NX-76DE/NX-72DE 4 – 3...
  • Page 43 UX-178DE/FO-175DE NX-76DE/NX-72DE 3. Operational description CHAPTER 5. CIRCUIT DESCRIPTION Operational descriptions are given below: • [1] Circuit description Transmission operation When a document is loaded in standby mode, the state of the docu- ment sensor is sensed via the 1 chip fax engine (XFC3). If the sensor 1.
  • Page 44 UX-178DE/FO-175DE NX-76DE/NX-72DE 3) 27C01012 (IC7): pin-32 DIP (ROM) [2] Circuit description of control PWB EPROM of 1Mbit equipped with software for the main CPU. 1. General description 3) W24257S-70LL (IC5): pin-28 SOP (RAM) Line memory for the main CPU system RAM area and coding/decoding Fig.
  • Page 45 UX-178DE/FO-175DE NX-76DE/NX-72DE XFC3 (IC2) Terminal descriptions Input Output Pin Description Pin Name Pin No. Type Type (Note: Active low signals have an "n" pin name ending.) CPU Control Interface − MIRQn Modem interrupt, active low. (Hysteresis In, Internal Pullup.) − SYSCLK System clock.
  • Page 46 UX-178DE/FO-175DE NX-76DE/NX-72DE XFC3 (IC2) Terminal descriptions Input Output Pin Name Pin No. Pin Description Type Type Operator Panel Interface OPI[3]/GPIO[24] (Pullup, Hysteresis In) Keyboard return [3] or GPIO[24] − LEDCTL Indicates outputs OPO[7:0] are for LEDs. − LCDCS LCD chip select. General Purpose I/O GPIO[0] (Hysteresis In) GPIO[0].
  • Page 47 UX-178DE/FO-175DE NX-76DE/NX-72DE (2) Panel control block The following controls are performed by the XFC3. • Operation panel key scanning • Operation panel LCD display (3) Mechanism/recording control block • Recording control block diagram (1) OPO[7:0]* TEST OPERATOR OPI[3:0]* BATRSTN PANEL, PANEL/LCD PWB LEDCTL* RESETN...
  • Page 48 UX-178DE/FO-175DE NX-76DE/NX-72DE FEATURES (4) Modem (R96DFXL-CID) block • Group 3 facsimile transmission/reception INTRODUCTION The Rockwell R96DFXL-CID MONOFAX modem is a synchronous 9600 – ITU-TS V.29, V.27 ter, T.30, V.21 Channel 2, T.4 bits per second (bps) half-duplex modem with error detection and DTMF –...
  • Page 49 UX-178DE/FO-175DE NX-76DE/NX-72DE R96DFXL-CID (IC4) Hardware Interface Signals Pin No. Signal Name I/O Type Pin Signals – 100-Pin PQFP GP13 IA/OB Pin No. Signal Name I/O Type GP03 IA/OB GP11 IA/OB GP04 IA/OB GP05 IA/OB EN85 GP06 IA/OB 0VD2 GP07 IA/OB PORI 0VD2 XTLI...
  • Page 50 UX-178DE/FO-175DE NX-76DE/NX-72DE [3] Circuit description of TEL/LIU PWB (1) TEL/LIU block operational description 1) Block diagram TEL/LIU PWB CONTROL PWB TXCONT TXOUT SIGTX LINE CI DETECTOR MODEM EXT. (R96DFXL-CID) RXIN DP GEN. SIGRX RX MUTE HANDSET TEL IN TELOUT VOL A VOL B VOL C BZCONT...
  • Page 51 UX-178DE/FO-175DE NX-76DE/NX-72DE 2. Noise filter 7. Signal selection The noise filter comprises the RF choke coil, L4A, L4B. The following signals are used to control the transmission line of TEL/ FAX signal. For details, refer to the signal selector matrix table. 3.
  • Page 52 UX-178DE/FO-175DE NX-76DE/NX-72DE [Signals for status recognition according to input signals] Signal Name (CNLIUA) Signal Name (CNLIUA) RXIN Signal Name Function TELOUT TXOUT TELIN H: The handset is in the on-hook state. TELMUTE L: The handset is in the off-hook state. +24VA Incoming call (CI) detection signal.
  • Page 53 UX-178DE/FO-175DE NX-76DE/NX-72DE [4] Circuit description of power supply PWB 1. Block diagram T1.25A/250V Noise Rectifying Filter AC IN Smoothing Switching Circuit Regulater Circuit Circuit Circuit (RCC system) T1.25A/250V +24V 4A/72V Photo Coupler Fig. 7 2-1. Noise filter circuit The overcurrent protection is performed by bringing Q1 to OFF state through detection of voltage increase in the auxiliary winding of T1 by The input noise filter section is composed of L and C, which reduces ZD2 and R9.
  • Page 54 UX-178DE/FO-175DE NX-76DE/NX-72DE CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT BATRST 270 x 4 VBAT C126 2200P RESET (4-4D) PWRDWN C141 15P XOUT 270 x 4 32.768kHz TSTCLK C140 22P SYSCLK +VREF (3-2A) +VREF (5-4D) SYSCLK MIRQ R105 –VREF (5-4D) (3-2A) –VREF/CLREF MIRQ R108...
  • Page 55 UX-178DE/FO-175DE NX-76DE/NX-72DE 6 – 2...
  • Page 56 UX-178DE/FO-175DE NX-76DE/NX-72DE XTLO XTLI +5VD2 EYEY EYEX 0VD2 EYECLKX 0VD2 SYNCIN2 0VD2 SYNCIN1 0VD2 EYESYNC 0VD2 ECLKIN1 0VD2 EYECLK 0VD2 R147 BYPASS BYBASS (1-4D) 0VD2 0VD2 0VD2 TXLOSS1 0VD1 TXLOSS2 0VD1 TXLOSS3 N.C. +5VD1 DPMUTE R157 470 CNLIUB-5 GP11 R158 470 VOLB (6-1H) GP21...
  • Page 57 UX-178DE/FO-175DE NX-76DE/NX-72DE 6 – 4...
  • Page 58 UX-178DE/FO-175DE NX-76DE/NX-72DE C164 1000P C165 1000P C163 1000P C162 1000P C176 1000P C196 82P 6 – 5...
  • Page 59 UX-178DE/FO-175DE NX-76DE/NX-72DE 6 – 6...
  • Page 60 UX-178DE/FO-175DE NX-76DE/NX-72DE Control PWB parts layout (Top side) 6 – 7...
  • Page 61 UX-178DE/FO-175DE NX-76DE/NX-72DE Control PWB parts layout (Bottom side) 6 – 8...
  • Page 62 UX-178DE/FO-175DE NX-76DE/NX-72DE 6 – 9...
  • Page 63 UX-178DE/FO-175DE NX-76DE/NX-72DE 6 – 10...
  • Page 64 UX-178DE/FO-175DE NX-76DE/NX-72DE TEL/LIU PWB parts layout (Top side) 6 – 11...
  • Page 65 UX-178DE/FO-175DE NX-76DE/NX-72DE TEL/LIU PWB parts layout (Bottom side) 6 – 12...
  • Page 66 UX-178DE/FO-175DE NX-76DE/NX-72DE RD6.2ESAB2 RD30FB3 RD3.3ESAB2 1000P 1000P 1000P 6 – 13...
  • Page 67 UX-178DE/FO-175DE NX-76DE/NX-72DE Power supply PWB parts layout 6 – 14...
  • Page 68 UX-178DE/FO-175DE NX-76DE/NX-72DE R5 100K R10 100K R9 100K R3 100K R2 100K R4 100K R11 100K R12 100K R6 100K 6 – 15...
  • Page 69 UX-178DE/FO-175DE NX-76DE/NX-72DE CHAPTER 7. OPERATION FLOWCHART [1] Protocol Receive side Transmitter side G3 communication (Document inserted into document sensor during standby) To recording position Document inserted to the reading position (DCS) (DCS) 1st page Next page insert command Cut line printed Cut line printed Recording papor ejected Document ejected...
  • Page 70 UX-178DE/FO-175DE NX-76DE/NX-72DE [2] Power on sequence START CPU initialized MODEM initialized “WAIT A MOMENT” display STOP key ? “MEMORY CLEAR ?” display 3 sec ? STAND-BY START key ? COPY key ? STOP key ? “MEMORY CLEARED” display “MEMORY CLEARED” display 3 sec ? Memory clear Memory clear...
  • Page 71 UX-178DE/FO-175DE NX-76DE/NX-72DE CHAPTER 8. OTHERS [1] Service tools 1. List PRICE PARTS CODE DESCRIPTION Q’TY RANK C P W B S 2 9 1 5 S C S 1 Relay board unit P S H E Z 3 3 5 4 S C Z Z Shading wave memory standard paper Relay board unit (TP2)
  • Page 72 UX-178DE/FO-175DE NX-76DE/NX-72DE 2. Description 2-1. Relay board unit 1. Remove the TEL/LIU PWB, control PWB and Power Supply PWB from this unit, and mount the relay board unit instead. • Before connecting the wiring to the relay board unit, set the test PWB switches to the fixed position.
  • Page 73 UX-178DE/FO-175DE NX-76DE/NX-72DE 3. Shading paper The white and black basis is applied to remember the shading wave- form. Be sure to perform this operation when replacing the battery or replacing the control PWB. Execute in the shading mode of DIAG mode. UX-178/NX-72 SERIES SHADING WAVE MEMORY STANDARD PAPER (PSHEZ3354SCZZ) 8 –...
  • Page 74 UX-178DE/FO-175DE NX-76DE/NX-72DE [2] IC signal name CONTROL PWB UNIT IC9: VHiNJM2904M-2 (NJM2904M) IC5: VHiW24257S7LL (W24257S-70LLT) (TOP VIEW) (TOP VIEW) PIN NAME 1. A OUTPUT 2 .A–INPUT 3. A+INPUT 4. GND 5. B+INPUT – 6. B–INPUT Pin name Signal 7. B OUTPUT Address input A0~A12 8.
  • Page 75 UX-178DE/FO-175DE NX-76DE/NX-72DE IC8: VHiNJM2902M-1 (NJM2902M) IC7: VHi27C01012TI (27C010) EP-ROM D OUTPUT A OUTPUT (TOP VIEW) Pin name Signal D-INPUT A-INPUT + – – A0~A16 Address input Chip enable A+INPUT D+INPUT Output enable Ground Program DQ1~DQ8 Data output (Program input) +5V power B+INPUT C+INPUT +12.5V power(*)
  • Page 76 UX-178DE/FO-175DE NX-76DE/NX-72DE IC4: VHiR96XFC3CID (96DFXL-CID) GP03 0VD2 GP04 CTSn GP05 0VD2 GP06 GP07 GP17 0VD2 GP16 SYNCIN2(G2XCLK) 0VD2 DCLKI(IRQ2n) +5VD1 YCLK XCLK XTLO XTLI PORin 0VD2 0VD2 EN85n RTSn GP11 RAMPIN SEE NOTE 1 GP13 +5VD2 0VD1 SWGAINI ECLKIN1 SYNCIN1 READn WRITEn IRQn...
  • Page 77 UX-178DE/FO-175DE NX-76DE/NX-72DE IC2: VHiR96XFC3CID (XFC3) VSSO GPIO20/ALTTONE SM0/GPO4 SM1/GPO5 SM2/GPO6 SM3/GPO7 VDDI VSSO START CLK1 CLK1N CLK2 FCS2N/VIDCTL1 FCS1N/VIDCTL0 VDDO VSSI GPIO0 GPIO1/SASTXD GPIO2/SASRXD GPIO3/SASCLK GPIO4 GPIO5/SSCLK2 VSSO VSSO GPIO6/SSTXD2 GPIO7/SSRXD2 GPIO8/FWRN GPIO9/FRDN GPIO10/SSSTAT2 GPIO11/BE /SERINP VSSI VDDO GPIO12/CS2N PCLK POAT GPIO13/CS3N PLAT...

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