Sharp FO-4650 User manual

1 - 1
FO-4650U
No. 00ZFO4650USME
Parts marked with " " is important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintain-
ing the safety and performance of the set.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SHARP CORPORATION
SERVICE MANUAL
Laser Wave Length : 770-810 mm
Laser Pulse Times : 49.2 µs
Laser Output Power : 0.37 mW
CAUTION
This laser facsimile is a class 1 laser product that complies with 21CFR 1040.10 and 1040.11 of the CDRH standard or IEC60825-1.
This means that this machine does not produce a hazardous laser radiation. The use of controls, adjustments or performance of
procedures other than those specified herein may result in hazardous radiation exposure.
This laser radiation is not a danger to the skin, but when an exact focusing of the laser beam is achieved on the eyes retina, there is
danger of spot damage to the retina.
The following cautions must be observed to avoid exposure of the laser beam to your eyes at the time of servicing.
1) When a problem in the Laser Optical Unit has occurred, the whole Optical Unit must be exchanged as a unit.
2) Do not look into the machine with the Main Switch turned on after removing the Toner/Developer Unit and Drum Cartridge.
3) Do not look into the laser beam exposure slit of the Laser Optical Unit with the connector connected when removing and install-
ing the Optical Unit.
4) The cover of Laser Printer Unit contains the Safety Interlock Switch.
Do not defeat the safety interlock by inserting wedges or other items into the switch slot.
FACSIMILE
MODEL FO-4650
SELECTION CODE DESTINATION
U U.S.A.
The FO-4650U Service Manual contains information which differs from the FO-4700U Service Manual.
For additional information, refer to the FO-4700U (00ZFO4700USME) Service Manual.
Difference between FO-4700U and FO-4650U
FO-4700U FO-4650U
Control PWB Unit DCEKC082MXHZZ DCEKC789PXHZZ
Printer PWB Unit DCEKC470BXH01 DCEKC470BXH03
Memory PWB OPTION (FO-1MK) NOT SUPPLY
PC I/F PWB OPTION (FO-47IF) NOT SUPPLY

1 –2
FO-4650U
CONTENTS
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
[2] Operation panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
[3] Transmittable documents (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . . . . . 1-4
[4] Installation (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
[5] Quick reference guide (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . . . . . . . 1-4
CHAPTER 2. ADJUSTMENTS
[1] Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
[2] Diagnostics and service soft switches (Refer to the service manual of FO-4700U/FO-47UC) . . . . 2-2
[3] Troubleshooting (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . . . . . . . . . . . . 2-2
[4] Error code table (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . . . . . . . . . . . . 2-2
CHAPTER 3. MECHANICAL DESCRIPTION
[1] Mechanical description (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . . . . . . . 3-1
[2] Printer description (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . . . . . . . . . . . 3-1
[3] Disassembly and assembly procedures (Refer to the service manual of FO-4700U/FO-47UC) . . . 3-1
CHAPTER 4. DIAGRAMS
[1] Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
[2] Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
[3] Point-to-point diagram and connector signal name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Circuit description (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . . . . . . . . . . . 5-1
[2] Circuit description of Control PWB (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . 5-1
[3] Circuit description of LIU PWB (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . 5-1
[4] Circuit description of Operation PWB (Refer to the service manual of FO-4700U/FO-47UC) . . . . . 5-1
[5] Circuit description of Power Supply PWB (Refer to the service manual of FO-4700U/FO-47UC) . . 5-1
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT
[1] Control PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
[2] LIU PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19
[3] Printer PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21
[4] Power Supply PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25
[5] Operation Panel PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27
[6] High Voltage PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29
[7] Toner Empty PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31
CHAPTER 7. OPERATION FLOWCHART
[1] Protocol (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
[2] Power on sequence (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . . . . . . . . . 7-1
CHAPTER 8. OTHERS
[1] Service Tools (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . . . . . . . . . . . . . . 8-1
[2] IC signal name (Refer to the service manual of FO-4700U/FO-47UC) . . . . . . . . . . . . . . . . . . . . . . 8-1
PARTS GUIDE

1 – 1
FO-4650U
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications
• GENERAL
* Based on ITU-TTest Chart #1 at standard resolution in Sharp special
mode, excluding time for protocol signals (i.e., ITU-T phase C time
only).
Automatic dialing Rapid Key Dialing: 48 numbers
Speed Dialing: 75 numbers
Memory size* 1 MB (approx. 56 pages)
Modem speed 14,400 bps (max.)
Automatic fallback to lower speeds.
Transmission time* Approx. 6 seconds
Toner cartridge yield Initial starter cartridge (included with
(4% page coverage, fax machine): Approx. 3000 pages
letter paper) Replacement cartridge (FO-47ND):
Approx. 6000 pages
Drum cartridge yield Initial starter cartridge (included with
fax machine): 20,000 pages (avg.)
Replacement cartridge (FO-47DR):
20,000 pages (avg.)
Resolution Horizontal: 203 pels/inch (8 pels/mm)
Vertical:
Standard: 98 lines/inch (3.85 lines/mm)
Fine /Halftone:
196 lines/inch (7.7 lines/mm)
Super fine:
391 lines/inch (15.4 lines mm)
Automatic document Letter paper(20 lb): Max. 50 pages
feeder Legal paper: Max. 20 pages
(Note: 11" x 17" paper must be loaded
one page at a time.)
Paper capacity 250 sheets (500-sheet
cassette available as option)
Compression scheme MMR, MR, MH, Sharp (H2)
Halftone (grayscale) 64 levels
Applicable telephone line Public switched telephone network
Compatibility ITU-T (CCITT) G3 mode
Printing resolution Horizontal: 406 lines/inch
(16 lines/mm)
Vertical: 391 lines/inch
(15.4 lines/mm)
Input document size Automatic feeding:
Width: 5.8 to 10.1" (148 to 256 mm)
Length: 5.0 to 14.3" (128 to 364 mm)
Manual feeding:
Width: 5.8 to 11.0" (148 to 279 mm)
Length: 5.0 to 17.0" (128 to 432 mm)
Effective Scanning width 8.3" (210 mm) max.
Effective Printing width 8.0" (203 mm) max.
Reception modes Auto/Manual
Instascan speed 30 ppm (letter paper)
Full Dual Access Yes
Copy function Single/Multi/Sort (99 copies/page)
Power requirements 120 V AC, 60 Hz
Operating temperature 50 - 86°F (10 - 30°C)
Humidity 20 to 85% RH
Power consumption Standby: 10 W
Maximum: 580 W
Dimensions Width: 18.1" (460 mm)
Depth: 15.2" (385 mm)
Height: 10.6" (270 mm)
Weight Approx.27.8Ibs.(12.6kg)
Option
Toner cartridge : FO-47ND
Drum cartridge : FO-47DR
Paper cassette : FO-47UC
Verification stamp : FO-45VS
As a part of our policy of continuous improvement, SHARP reserves the right to make design and specification changes for product
improvement without prior notice. The performance specification figures indicated are nominal values of production units. There may be some
deviations from these values in individual units.

1 – 2
FO-4650U
[2] Operation panel
123
456
7
89
10
RESOLUTION
STANDARD
FINE
SUPER FINE
HALF TONE
LINE IN USE
CHANGEOVER
POWER SAVE
STATUS CHECK
CLEARSPSHIFTSPACE
A
I
Q
Y
B
J
R
Z
C
K
S
D
L
T
E
M
U
F
N
V
G
O
W
H
P
X
01
09
17
25
02
10
18
26
03
11
19
04
12
20
05
13
21
06
14
22
07
15
23
08
16
24
27 28 29 30 31 32
CLEARSPSHIFTSPACE
A
I
Q
Y
B
J
R
Z
C
K
S
D
L
T
E
M
U
F
N
V
G
O
W
H
P
X
33
41
CONTRAST
SEARCH DIAL
34
42
PAGE COUNTER
35
43
CONFIDENTIAL
36
44
TIMER
37
45
RELAY
38
46
39
47
MEM.STATUS
40
48
LIFE
DOWN UP
COVER SHEET
Rapid Key
overlay down
Rapid Key
overlay up
11
20 21 22 23 24 25 26
12 13 14 15 16 17 18 19
11
123
456
789
0
ABC
GHI
DEF FUNCTION
COPY DOCUMENT DUPLEX SCAN
BROADCAST
STOP START
REPORT
SPEED DIAL
REDIAL
SPEAKER
JKL MNO
PRS TUV
OPER
WXYZ
PRIORITY
27 28 29 30 31 32
39383736353433
Display
This displays messages and prompts during operation and
programming.
LINE IN USE light
This lights when the fax machine is using the telephone line.
STATUS CHECK light
This lights when a paper size error or paper jam occurs, or when
the print compartment cover is open. A message will appear in
the display to indicate the problem. (The indicator also lights
steadily when the received document tray is not properly installed.)
Service indicator
This lights when a problem occurs which must be fixed by a
service technician.
Paper out indicator
This lights when the fax machine is out of paper. If the machine
has a paper cassette, the indicator blinks when one of the paper
sources (tray or cassette) is out of paper, and lights steadily
when all sources are out of paper.
Toner cartridge indicator
This blinks when the toner cartridge nears empty, and lights
steadily when the toner cartridge needs replacement.
Drum cartridge indicator
This blinks when the drum cartridge needs replacement.
CHANGEOVER key
Two types of information appear in the display: prompts related
to operations you are performing, and information about how
the fax is using the telephone line (transmitting, receiving, etc.).
Press this key to switch between the two types of information.
POWER SAVE key
Press this key to turn on Power Save Mode, or set the Power
Save Mode timer if TIMER has been selected with Option
Setting 34 (Power Save Type).
RESOLUTION key
Press this key to adjust the resolution before sending or copying
a document.
Rapid Dial Keys
Press one of these keys to dial a fax number automatically.
(Note that you must attach the Rapid Key labels.)
CONTRAST key
Press this key to adjust the contrast before sending or copying
a document.
PAGE COUNTER key
Press this key to include a slash and the total number of pages
after each page number on the pages of a transmitted document.
CONFIDENTIAL key
Press this key to send or print out a confidential document.
TIMER key
Press this key to set an operation to be performed automatically
at a later time.
RELAY key
Press this key to send a document to another Sharp fax machi-
ne and have that machine in turn relay the document to one or
more end receiving machines.
LIFE key
Press this key, followed by 1, to check the total number of pages
printed by the fax machine.
MEM. STATUS key
Press this key to check the status of documents waiting in mem-
ory for transmission.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

1 – 3
FO-4650U
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
SEARCH DIAL key
Press this key to search through your auto dial fax numbers by
name.
COVER SHEET key
Press this key to include a cover sheet when sending a fax.
SPACE key
Press this key to enter a space when programming a name.
SHIFT key
Press this key to switch between upper and lower case letters
when programming a name.
SP key
Press this key to enter a symbol when programming a name.
CLEAR key
Press this key to clear a mistake when programming a name or
fax number.
Arrow keys
Press these keys to move the cursor forward or backward when
programming a name or fax number.
UP and DOWN keys
Press these keys to adjust the volume of the speaker when the
SPEAKER key has been pressed, or the volume of the ringer at
all other times.
Dial keypad (numeric keys)
Use these keys to dial and program fax numbers.
FUNCTION key
Press this key to select various special functions.
SPEED DIAL key
Press this key to dial a Speed Dial number.
COPY key
Press this key to make a copy of a document.
DOCUMENT key
Press this key to transmit a document without reading it first
into memory.
DUPLEX SCAN key
Press this key to transmit or copy a two-sided document.
REDIAL key
Press this key to automatically redial the last number dialed.
SPEAKER key
Press this key when transmitting a document by Normal Dialing
to listen to the line and verify the response of the receiving fax
machine.
BROADCAST key
Press this key to send a document to a group of receiving fax
machines.
STOP key
Press this key to cancel an operation before it is completed.
PRIORITY key
Press this key when you need to transmit a document ahead of
other documents waiting in memory for transmission.
START key
Press this key to begin transmission when using Speed Dialling,
Direct Keypad Dialling, or Normal Dialling.
REPORT key
Press this key to print out a report on the most recently complet-
ed transmission or reception.

1 – 4
FO-4650U
[3] Transmittable documents
Refer to the service manual of FO-4700U/FO-47UC
[4] Installation
Refer to the service manual of FO-4700U/FO-47UC
[5] Quick reference guide
Refer to the service manual of FO-4700U/FO-47UC

FO-4650U
2 – 1
CHAPTER 2. ADJUSTMENTS
[1] Adjustments
General
Sincethefollowingadjustmentsandsettingsareprovidedforthismodel,
make adjustments and/or setup as necessary.
1. Adjustments
Adjustments of output voltage (FACTORY ONLY)
1. Install the power supply unit in the machine.
2. Set the recording paper and document.
3. When the document is loaded, power is supplied to the output lines.
Confirm that outputs are within the limits below.
Output voltage settings
Fig. 1
CNPW CNPRT
CN1
IC2
CN1
CN7
CN4
1
1
1
1
11
11
8
1
1
1
112
30
30
12
8
CONTROL
PWB
PRINTER
PWB
HI VOLTAGE
PWB
CN5
CN1
POWER SUPPLY
PWB
IC2
VR1 VD
Voltage for adjust
+ Check point for voltage
Digital multi meter
+–
–
Connector CN5
No.
Pin No. CNPW
1 +24V SUB
2MG
3MG
4MG
5 +24V MAIN
6 +24V MAIN
7 +5V SUB
8DG
9DG
10 DG
11 +5V MAIN
12 +5V MAIN
Connector CN4
No.
Pin No. CN1
1 11 +5V
2 10 HV C HL
39TVR
4 8 T REM
5 7 T MON
6 6 B MON
7 5 B VR
8 4 C REM
9 3 C MON
10 2 MG
11 1 +24
Connector CN1
No.
Pin No. CN7
1 24 MAIN
2MG
3DG
4 5V MAIN
5 HEATER ON
6FAN
7 FAN LOCK
8 H RELAY OFF
Output Voltage limits
+5V MAIN 4.845V~5.355V
+5V SUB 4.845V~5.355V
+24V MAIN 23.04V~24.96V
+24V SUB 23.04V~24.96V
Top Void Printer Adjust Voltage
Label (mm.) Fig. 2 VR1 Fig. 1
5.5~6.9 4.42V
7.0~8.9 3.87V
9.0~10.9 3.14V
11.0~12.9 2.50V
13.0~14.9 1.86V
15.0~17.0 1.22V
ADJUST VOLTAGE LIST
TOP VOID LABEL
Fig. 2
2
(step 1) Select "OPTION SETTING".
DISPLAY:
DISPLAY:
DISPLAY: TONE SELECTED
KEY:
FUNCTION 4
KEY:
4:OPTIONAL SETTING
ENTER #(01-34, ,#)
KEY:
DIAL MODE 1=TONE, 2=PULSE
KEY:
KEY:
DISPLAY:
(step 4) End, using the "STOP" key.
(step 3) Select, using "1" or "2".
(step 2) Select "DIAL MODE".
1
2
PULSE SELECTED
STOP
Cursor
When initially registering,
the mode shows 1=TONE.
When registering again, the
mode which was registered
formerly is shown.
2
2. IC protectors replacement
ICPs (IC Protectors) are installed to protect the TX motor drive circuit
and verification stamp drive circuit. ICPs protect various ICs and elec-
tronic circuits from an overcurrent condition.
The location of ICPs are shown below:
(1) F100 (ICPS10) is installed in order to protect IC’s from and
overcurrent generated in the verification stamp drive circuit. If F100
is open, replace it with a new one.
(2) F101 (ICPS18) isinstalledinordertoprotectIC’sfrom anovercurrent
generated in the TX motor drive circuit. If F101 is open, replace it
with a new one.
In addition to the replacement of F101 and F100, the factor causing
F101 and F100 to open must also be repaired. If not, F101 and
F100 will open again.
Replacement parts
ICPS10 (Sharp code: VHViCPS10//-1)
ICPS18 (Sharp code: VHViCPS18//-1)
3. Settings
(1) Dial mode selector
OPTION SETTING: DIAL MODE (Soft Switch No. SW2 DATANo. 1)
Use this to set the fax machine to the type of telephone line you are on.
• The factory setting is "TONE".
Fig. 3
CONTROL PWB
(BOTTOM SIDE)
F100
F101
IC7
CNSP
CNSEN
CNCIS
CNPN
CNSTP
CNTXM
CNPW CNPRT CNLIU
1
1
2
1
8
101
1
11
150
27 25
1130
12
42
24
9
CNOP

FO-4650U
2 – 2
[2] Diagnostics and service soft switches
Refer to the service manual of FO-4700U/FO-47UC
[3] Troubleshooting
Refer to the service manual of FO-4700U/FO-47UC
[4] Error code table
Refer to the service manual of FO-4700U/FO-47UC

FO-4650U
3 – 1
CHAPTER 3. MECHANICAL DESCRIPTION
[1] Mechanical description
Refer to the service manual of FO-4700U/FO-47UC
[2] Printer description
Refer to the service manual of FO-4700U/FO-47UC
[3] Disassembly and assembly procedures
Refer to the service manual of FO-4700U/FO-47UC

FO-4650U
4 – 1
CHAPTER 4. DIAGRAMS
[1] Block diagram
FO-45VS
VERIFICATION STAMP
(OPTION)
LZ9FJ59
MAIN CPU
SH7021
SRAM
256KB
DRAM
2MB
MODEM
14.4Kbps
EPROM
2MB
CODEC
HD813201F
CODEC I/F
LR38292
DRAM
2MB
RAM
2KB
R.T.C.
CIS UNIT
I/O PORT
MOTOR/
MECHANISM
CONTROL
FLASH MEMORY
CONTROL
PRINTER I/F
PANEL I/F
DRAM
CONTROLLER
DRIVER
MOTOR
DRIVER TX MOTOR
SENSOR
SPEAKER
SCANNER UNIT
DRIVER
CONTROL PWB UNIT
INTERRUDTION
REQUIREMENT
CONTROL
MAPPER
RECORD DATA
PROCESSING IMAGE TREATMENT LSI
LC82103
TEL
LINE
LIU
PWB UNIT
PANEL
PWB UNIT
PRINTER
PWB UNIT
PRINTER
UNIT
POWER SUPPLY
UNIT