Mita-Kyocera FS6700 Service Manual 06

Chapter 6 TROUBLESHOOTING

Contents
6.1 Board layouts, page 6-2 Liaison board KP-620, page 6-2 Scanner interface board KP-622, page 6-3 Connect board connector/KP-616, page 6-3 Fuser board KP-505/YC-721, page 6-4
6.2 Overall wiring diagram, page 6-5
6.4 General error handling, page 6-9 Priority, page 6-9
6.5 User-recoverable errors, page 6-11 Memory card errors, page 6-13
6.6 Service errors, page 6-15 E0—Communication error, page 6-16 E1—Main motor error, page 6-16 E2—Laser scanner motor error, page 6-21 E3 - Laser beam detection error, page 6-25 E4 - Fuser heater error, page 6-28 E5—Eraser error, page 6-30 ED—Flash ROM error, page 6-31 E9 - Toner motor error, page 6-31 F0 - Front control panel error, page 6-32 F1 - System ROM error, page 6-32 F2 - Main memory error , page 6-32 F3 - General failure , page 6-32 False error—Feed unit cover open, page 6-32
6.7 Print quality problems, page 6-37 Completely blank printout, page 6-37 All-black printout, page 6-37 Dropouts, horizontal streak, black dots, page 6-37 Black vertical streaks, page 6-38 Unsharp printing, page 6-38 Grey background, page 6-38 Dirt on the top edge or back of the paper, page 6-39 Incorrect printing registration, page 6-39 Checking cassette size sensors, page 6-40 Drum cleaning, page 6-40

6.1 Board layouts

This section explains the appearance and pin assignment for the printer boards. The wiring information for these boards is on

Liaison board KP-620

Troubleshooting
Board layouts
6.2 Overall wiring diagram
, page 5.

Table 6. 1 KP-620 connectors

Loc.
above
1 CN8 Fan (large) — 2 CN3 Main motor E1, pin 3 (MOTOR*)/pin 1
3 CN4 Registration clutch — 4 CN1 Engine board KP616/CN14 5 CN5 Feed clutch — 6 CN7 Manual feed clutch — 7 CN9 Cassette detect switch — 8 CN2 Front panel — 9 CN6 Manual feed solenoid
Connector Connected to: Check points
(+24V)
6-2
FS-6700
Troubleshooting
Board layouts

Scanner interface board KP-622

Table 6. 2 CN13 (Scanner CN1) pin assignment

Pin No. Signal
1+5V 2GND 3LONB 4 LASER 5VDOUT+ 6VDOUT­7PD 8SCCLK 9SCRDY* 10 SCANNER* 11 GND 12 +12V

Connect board connector/KP-616

The two connectors at the right side of the printer are mounted on the connect board. These connectors derive engine signals. For pin assignments, refer to
Overall wiring diagram
, page 5.
6.2
FS-6700
6-3

Fuser board KP-505/YC-721

18
Troubleshooting
Board layouts
12
CN13 (for laser scanner unit)
1112
12
CN14 (for KP-620 board)
1718

Table 6. 3 YC-721

Pin No. Signal
1FUPSD* 2+24V 3FDNSD* 4 PFULL* 5 THERM* 6EXITJ* 7GND 8+5V
6-4
FS-6700
Troubleshooting
Overall wiring diagram

6.2 Overall wiring diagram

S2029
TONER
SENSOR
MOTOR
S2276
THERMO CUT OUT
SENSOR
TONER
1
2
1
2
S2263
HEATER
SENSOR
SOLENOID
S2021
C
1
1
E
2
2
ZENER PWB (KP-501)
TRANSFER ROLLER
MAG ROLLER
TONER
2
2
GND
1
1
TDRV*
2
2
+24V
1
1
S2023 S2274
AC IN
(CN1) POWER SWITCH
(CN2)
FEED UNIT (BASE)
THERMISTER
+5V
THERM*
S2253
PAPER FULL
+5V
1
1
PAPFL*
2
2
GND
3
3
FACE
UP/DOWN
FCUP* +24V FDOWN*
TNFULL PWB
(KP-506)
(YC842)
(YC841) 1 2
ERASER
TONER
1
1
GND
2
2
TNRDR*
3
3
+24V
4
4
1
2
1 2 3
1 2 3
S2018
+5V
1
1
TNFULL*
2
2
TSEN*
3
3
ERASER GND
1 2
HIGH VOLTAGE UNIT
3 4 5 6 7 8
1
1
9
2
2
10 11 12
5
5
(CN2)
13
(CN1)
6
6
14 15
MANUAL PAPER
FEED ROLLER
1
2
1 2 3
1 2 3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
BOX FAN MOTOR
POWER SUPPLY UNIT
(CN5)
+24V COM
+24V COM
+24V COM
(CN2)
(KP-628)
FUSER PWB
(KP-499)
(YC741)
(YC743)
DRUM PWB
(KP-500)
(YC742)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
MANUAL FEED
GND
1
1
HAND*
2
2
+5V
3
3
12345 12345
+5V
12345
SENSOR PWB
(CN25)
6 6
+24V
6
(YC723)
(YC724)
(YC722)
1
1
2
2
3
3
1
1
2
2
S2266
+24V MHVDR* THVDR1* CHVON* THVDR2* PSEL* SPVDR1* SPVDR2* BIAS* HVCLK TONR TNSCN +5V GND TNRDR*
PAPER SENSOR
+24V COM BFANDR
1 2
S2011
S2265
SCOVR*
1
PAPER*
2
FEEDS*
3
TNCON*
4
+24V
5
(CN1)
+24V
6
+24V
7
+24V
8
+24V
9
FCOVER*
10
TCOVR*
11
GND
12
S2252
FUPSD*
1
1
+24V
2
2
FDNSD*
(YC721)
3
3
PFULL*
4
4
THERM*
5
5
EXITJ*
6
6
GND
7
7
+5V
8
8
S2007
(YC821)
(YC822)
TSEN*
1
WTONR
2
DRUM RELAY PWB
(KP-505)
ERASE*
3
EECSEL
4
EEDAT
5
EESCLK
6
GND
7
+5V
8
30:SCANR*
60:+5V
(CN27)
123 123
+5V
HANDS*
GND
S2255
(CN6)
1 2
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
27:CASET0
28:GND
29:CASET1
57:+24V
58:HEAT*
59:BOXFAN*
(CN4)
GND
1
1
GND
2
2
GND
3
3
VCC
4
4
(CN15)
VCC
5
5
VCC
6
6
ZCROS
7
7
PHET
8
HEAT*
8
9
9
10
10
BOXFAN*
S2277
G2G1
ENGINE PWB (KP-614)
(CN12)
(CN21)
(CN23)
(CN24)
17:RDY*
18:PDIN*
19:VSYNC*
20:GND
21:PRINT*
22:SCNCLK
23:PDOUT*
24:GND
25:RESET*
26:SCRDY*
47:REGDR*
48:+5V
49:+24V
50:MOTOR*
51:RCOVR*
52:+5V
53:+24V
54:ZCROS
55:PHET
56:+5V
(CN27)
6
5
4
3
2
1 1
GND
10
5
4
3
2
OPSL1
OPSL2
OPSDI
OPSDO
6
7
8
9
TO OPTION UNIT
6
OPSL0
5
+5V
OPRDY*
A1 :GND A2 :VCC A3 :VCC A4 :EGIR* A5 :VSREQ* A6 :CBSY* A7 :SC A8 :RDY* A9 :NC A10:NC A11:FPDATA A12:PRINT* A13:RESET* A14:OUTPE* A15:GND A16:GND B1 :GND B2 :VCC B3 :VCC B4 :NC B5 :SBSY* B6 :SCLK B7 :CPRDY B8 :CINH* B9 :VCC B10:NC B11:VSYNC* B12:PDOUT* B13:FPCLK B14:VDATA B15:FPDIR B16:GND
(CN12)
1 2
CONNECT PWB (KP-616)
3 4 5 6 7
(CN14)
8 9 10 11 12 13 14 15 16 17 18
72pin DIMM 1-SLOT (YS1)
(YC6)
S2258
GND
1
BFPCLK
2
BFPDIR
3
BFPDATA
4
+5V
5
FANDR*
6
FEDDR*
7
MPFSOL*
8
MPFCLH*
9
MTRCLK
10
REGDR*
11
MOTOR*
12
RCOVR*
13
+24V
14
+24V
15
+24V
16
GND
17
GND
18
S2261
+5V (LD)
1
1
GND
2
2
LONB*
3
3
LASER*
4
4
VIDEO+
5
5
(CN13)
VIDEO-
6
6
PDIN*
7
7
SCCLK
8
8
SCRDY*
9
9
SCANR*
10
10
GND
11
11
+24V
12
12
6 :LASER*
7 :SCLOCK
8 :GND
9 :CBSY*
10:VDOUT+
11:CPREDY
12:GND
13:SC
14:VDOUT-
15:CINH*
16:GND
36:+5V
37:+24V
38:FANDR*
39:FEDDR*
40:+5V
41:+24V
42:MPFSOL*
43:MPFCLH*
44:+5V
45:+24V
46:MTRCLK
10
9 8 7
10
9 8 7
+24V
OPSCK*
S2256
1
2 3 4
GND
CAS5
1
2
PAPER SIZE
LENGTH SW3
PC-Card
(YC3)
OPTION I/F CONNECTOR (YC1,2)
72pin PC-SIMM 2-SLOTS (YS3)
RELAY PWB (KP-620)
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
(CN1)
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
1
1
APC PWB (KP-622)
2
2
3
3
4
4
(CN1)
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
1 :EGIR*
2 :LONB*
3 :SBSY*
4 :GND
5 :VSREQ*
31:VDATA
32:GND
33:OUTPE*
34:CASET2
35:PPRDY
(CN28)
6 6
GND
CAS4
1
2
PAPER SIZE
LENGTH SW2
(KP-613)
S2279
(CN9)
+5V
121
CASS
2
S2259
+24V
1
1
(CN3) (CN4) (CN5) (CN6) (CN7) (CN8)
GND
2
2
MOTOR*
3
3
MMTCLK
4
4
+24V
1
1
REGDR*
2
2
+24V
1
1
FEDDR*
2
2
+24V
1
1
MPFSOL*
2
2
+24V
1
1
MPFCL*
2
2
FANCOM
121
FANDR*
2
S2260
+5V
1
1
FPDAT
2
2
+5V
(CN2)
3
3
FPDIR
4
4
GND
5
5
FPCLK
6
6
GNG
7
7
S02025
S2272 +5V
1
1
(CN3)
PDIN*
2
2
GND
3
3
S2273
SCCLK
1
1
SCRDY*
(CN2)
2
2
SCANR*
3
3
GND
4
4
+24V
5
5
12345 12345
CAS3
2 LENGTH SW1
Main Controller
1 2
S2257
GND
1 PAPER SIZE
PARALLEL I/F CONN.
(YC4) (YC5)
SERIAL I/F CONN.
CASSETTE SWITCH
Main Motor
1
1
2
2
3
3
4
4
REGIST CLUTCH
FEED CLUTCH
M.FEED SOLENOID
M.FEED CLUTCH
FAN MOTOR
1 2
Front Panel
(KP-503)
3 4 5 6 7
PD PWB
(KP-637)
1
1
2
2
3
3
Polygon Motor
1
1
2
2
3
3
4
4
5
5
FS-6700
6-5

6.3 Diagnostic

The printer automatically executes its self-diagnostic test when it is powered up
(displaying
below.
When the printer locates the error with a specific item, it calls for operator*s atten-
tion by showing the appropriate message on the operator panel display.
The diagnostic test is done on the following systems simultaneously:
Engine system (E errors)
Controller system (F errors)
Flowcharts on the following pages show the order and the items diagnosed in each
system.
Note Diagnostic test is cancelled if one of the user-accessible covers
Self-test
is opened during the test.
Troubleshooting
Diagnostic
). The sequence and the items to be diagnosed are explained
6-6
FS-6700
Troubleshooting
Diagnostic

Engine diagnostics flow

1
Power on
2
Engine ROM cheksum
OK?
Yes
3
Fuser thermistor OK?
The heater lamp is turned on.
Yes
The scanner polygon motor revolves.
4
Polygon motor OK?
The polygon motor stops revolving.
Yes
The main motor revolves. The eraser array turns on.
No
No
E6 - Engine ROM error
No
9
10
E4 - Fuser error
11
E2 - Polygon motor
error
5
Eraser array OK?
Yes
The eraser array turns off.
6
Main motor OK?
Yes
7
Heater temperature
OK?
The main motor turns off.
Yes
8
Engine is ready.
No
No
No
12
E5 - Eraser error
13
E1 - Main motor error
14
E4 - Heater error
FS-6700
6-7

Logic controller diagnostics flow

1
Power on
Troubleshooting
Diagnostic
2
System ROM cheksum
OK?
Yes
3
Communication
established between
engine and main
CPUs?
Yes
4
System memory OK?
Yes
No
No
No
6
F1 - System ROM error
7
E0 - Communication
error
8
F2 - System memory
error
5
Controller is ready.
For details on how to react to the results of diagnostics, refer to section Service
errors on page 6-19.
6-8
FS-6700
Troubleshooting
General error handling

6.4 General error handling

Priority

Each error message has a priority over the others. Thus, if two or more error mes­sages are given simultaneously, the error message having the highest priority is shown. The priority is as follows (from the highest to the lowest):

Table 6. 4 Message priority

Error message Category Remarks
Call service person F0 Service error Refer to I/F occupied Top cover open User-recoverable error If not recovered, refer to Paper feed unit open User-recoverable error If not recovered, refer to Side cover open User-recoverable error Refer to
Opt. Feeder 1 (2) rear cover open
Duplex unit rear cover open
Replace Toner/Clean printerb
Missing Waste-toner bottle
Replace Waste-toner bottle
Clean printer/Press CONTINUE
Paper jamb User-recoverable error
Face-down tray paper fill
MEMORY CARD err Insert again
Insert the same MEMORY CARD
Print Cancel?
Memory overflow ... Press CONTINUE
Print overrun ... Press CONTINUE
KPDL error ... Press CONTINUE
MEMORYCARD err ... Press CONTINUE
Opt. ROM error ... Press CONTINUE
Set paper/Press CONTINUE
Load paper User-recoverable error Add paper User-recoverable error
User-recoverable error with PF-25 feeder
User-recoverable error with DU-25 duplexer
User-recoverable error
User-recoverable error If not recovered, refer to
User-recoverable error
User-recoverable error
User-recoverable error
User-recoverable error
User-recoverable error
User-recoverable error
User-recoverable error
User-recoverable error
User-recoverable error
User-recoverable error
User-recoverable error
FS-6700
6-9
Table 6. 4 Message priority
Error message Category Remarks
Self test Sleeping Please wait PJL OPMSG/STMSG Processing Waiting FormFeed TimeOut Option interface Error User-recoverable error
Toner low TK-20/Clean printer
Warning/Low memory -
Battery error/MEMORY CARD
Format error/MEMORY CARD
Warning battery/ MEMORY CARD
Ready
Troubleshooting
General error handling
User-recoverable error
User-recoverable error
User-recoverable error
User-recoverable error
6-10
FS-6700
Troubleshooting
User-recoverable errors

6.5 User-recoverable errors

User-recoverable errors do not normally require a service call unless the suggested remedy does not solve them. The instructions below indicate how to respond to problems indicated by the operator panel symbolic indicators and by the panel dis­play.

Table 6. 5 User-recoverable errors

Indication Corrective action
Flashing
Lit
The printer has run low on toner. The toner should be replaced as soon as possible.
Install a new toner kit. See chapter 1.
Fast flashing
Slow flashing
Lit
ATTENTION
Side cover Open Open the side cover, then close tightly. Paper feed unit Open Open the paper feed unit, then close tightly. Face-down tray paper full The face-down tray has become full (approx. 250
Add paper Add paper to the paper cassette or multi-purpose
Set paper/Press CONTINUE­CONT
Load paper papersize The paper size does not match. The size of the paper
Paper jam Open the top cover or the paper feed unit and correct
Flashing
Lit
There is a paper jam. There is a possibility that paper may be jammed at the point indicated by flashing, open and remove any jammed paper. See Section
The paper has run out in the paper cassette or multi-purpose tray. Please insert paper. See Section
This indicates either the current paper feeder or the paper output point.
The printer has insufficient memory available or the printer is warming up (Pleasewait). Confirm the message indicated on the message display. See Sec­tion
Note the maintenance message on the message dis­play and consult Table
pages). Remove all printed pages from the face-down tray. When the printer senses that the face-down tray is empty again, it will continues printing into the face-down tray. (Model FS-3700/+ only)
tray. Add a sheet of paper to the multi-purpose tray (man-
ual mode), and press the CONTINUECONT key.
in the cassette is different to the size specified by the application software or by PRESCRIBE II. Either put paper of the specified size into the cassette. See Section 1.4.If the CONTINUECONT key is pressed, printing will be resumed. However, if more than one sheet is to be printed, the same message will again be displayed from the second sheet onward. It is also possible to abandon printing by pressing the CAN­CEL key.
the paper jam (or paper mis-feeding in the cassette). See Section
FS-6700
6-11
Table 6. 5 User-recoverable errors
Indication Corrective action
Warning low memory The printer’s internal memory is running low due to
Toner low TK-20/Clean printer
Replace Toner/Clean printer Replace the toner container using a new toner kit.
Clean printer..Press CON­TINUECONT
ReplaceWaste- toner bottle Replace the old waste toner bottle with the new one
Missing Waste-toner bottle Install the waste toner bottle. See Section ... The
Memory overflow..Press CON­TINUECONT
Print overrun..Press CON­TINUECONT
MEMORY CARD err/Insertagain The memory card is accidentally removed from the
Insert the same MEMORY CARD You have inserted the wrong memory card when the
Troubleshooting
User-recoverable errors
the number of fonts and macros downloaded. Print a status page to see how much user memory is left, and try deleting unnecessary fonts and macros. See the PRESCRIBE II DELF and DELM commands explanation in the programming manual (CD-ROM).
Replace the toner container using a new toner kit. See Section
The printer does not operate when this message is displayed. See section
Please clean the inside of the printer. See Section ...This message will be displayed when replacing the toner container after the message ReplaceToner­Cleanprinter has been displayed. After cleaning the inside of the printer, press the CONTINUECONT key and the printer will be ready for printing.
which is included in the TK-20/TK-20HTK-20G toner kit. The message will also be shown if the waste toner bottle has become full. The waste toner bottle should be replaced when the message display eventually shows TonerlowTK-20Cleanprinter. See Section
printer does not operate when this message is dis­played.
The total amount of data received by the printer exceeds the printer’s internal memory. Try adding more memory (expansion RAM). Press the CONTIN­UECONT key to resume printing. You can abandon printing by the CANCEL key.
The data transferred to the printer was too complex to print on a page. Press the CONTINUECONT key to resume printing. (The page may break in some pages.)You can abandon printing by the CANCEL key.Note: After this message has been displayed, Page protect mode will be On. To maintain optimum use of memory during printing, display >Pagepro­tect from the control panel, and re-select Auto.See the printerís userís manual.
printer’s memory card slot during reading. If you continue reading the memory card, insert the same memory card into the slot again. The printer again reads it from the beginning of the data.Note: We rec­ommend that you follow the reading procedure from the beginning to ensure correct reading of the mem­ory card.
Insertagain message was displayed. Remove the wrong memory card from the printer’s memory card slot and insert the correct memory card. The printer again reads it from the beginning of the data.
6-12
FS-6700
Troubleshooting
User-recoverable errors
Table 6. 5 User-recoverable errors
Format error MEMORY CARD This message appears when the printer is in the
Warning battery MEMORY CARD This message appears when the printer is in the
MEMORY CARD err/ ##..Press CONTINUECONT
>Read fonts Failed The amount of memory available for the fonts
I/F occupied This message is displayed when you attempt to use
Processing PAR FIT A4 FIT (image FITting) flashes to indicate that a loss of
Processing PAR 600 A4ÍProcessing PAR 300 A4
>Read fonts Failed The amount of memory available for the fonts
Indication Corrective action
ready state and the memory card is not formatted, and therefore cannot be read or written. Follow the procedure on Section ... to format the card.
ready state and the battery in the memory card is low. You can still enter the memory card mode, but the battery should be changed as soon as possible.
This message appears when an error occurs during access to the memory card using the PRESCRIBE II ICCD command or from the printer’s control panel (codes 09 and 11 only). The error is indicated by one of the numbers ## listed under the Memory card errors which follows.
header parts of font is too small to load more fonts. Try deleting unnecessary fonts and macros.
the printer’s control panel to change the environ­mental settings on the interface from which data are presently being received.
raster data occurred when the data was compressed to be fitted within the currently available memory. Flashing FIT extinguishes automatically when the job times out; the printer receives the next data from the host computer; or if you press any key on the printer’s control panel. Try adding more memory in the printer to prevent this error.
Change of the resolution indicator from 600 to 300 (flashing) means that the job in 600-dpi resolution was not able to run within the currently available memory. The resolution reverts to 600 dpi automati­cally when the job times out; the printer receives the next data from the host computer; or if you press any key on the printer’s control panel. Try adding more memory in the printer to prevent this error.
header parts of font is too small to load more fonts. Try deleting unnecessary fonts and macros.
FS-6700

Memory card errors

Table 6. 6 Memory card errors

Error code
01 SRAM Card size error (An attempt was made to write data of greater
02 SRAM No memory card inserted. Insert a proper memory card.
Applicable
card type
Meaning
than 16 MB in size.). Reduce the size of the data to be written from the host computer to 16 MB or less; or, a file name could not be found in the memory card.
6-13
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