Sharp FO-6700 Service Manual Page 69
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- Table of contents
- TROUBLESHOOTING
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FO-6700U
FO-67DL
5 – 13
HD813201F (IC26) Terminal descriptions
Code Terminal No. I/O Function
DTC 37 O DMA Terminal Count (DMA terminal count terminal). When DTC output is turned
to "high", it indicates that DMA transfer of the setting line part is ended.
READY 73 I Image memory or I/O device read. When READY is turned to "high" during
writing, it indicates that the image memory or I/O device is ready for
transmitting/receiving the data.
When READY is "high", IDP201 will wait until READY becomes "high".
<Power terminal>
V
DD
1 29 I Power voltage (+5V)
V
DD
249 I
V
DD
372 I
V
SS
110 I
V
SS
2 17 I Ground
V
SS
334 I
V
SS
453 I
V
SS
570 I
V
SS
675 I
<Other>
TEST 0 18 I Fix these terminals at "low".
TEST 1 22 I
TEST 2 24 I
TEST 3 33 I
TEST 4 43 I
Code Terminal No. I/O Name and function
CLKI 19 I Quartz oscillation input terminal and external clock input terminal.
CLKX 20 O Quartz oscillation output terminal.
CKTST1 1 I Low pass filter terminal of PLL circuit.
Connected to capacitor (1000pF) and resistor (10kΩ) through GND.
CLKMOD 40 I Terminal to switch quartz oscillation connection or external clock input mode.
"0": Quartz oscillation.
"1": External clock.
CKTST0 41 I Fix at "LOW" level.
CLKO 21 O Clock output terminal. Rectangular wave which is synchronous with the internal
clock of IDP201 is output.
CKTST2 80 I Fix at "LOW" level.
(10) Page Memory Block
The Page Memory Block is composed of one DRAM of 1M × 16 bits,
being commonly used as the Image Memory. The memory is divided
into the Page Memory for the scanner and the Page Memory for printing.
The Page Memory for scanner is composed of the partial area of IC23.
The image data of approx. one page (except in the super fine mode) of
the draft read with the scanner can be stored. They are stored until they
are contracted by CODEC.
The Page Memory for printing is composed of the remaining areas of
IC23 and can store approx. one page of the image data decoded by
CODEC. The data are stored until they are transferred to PCU with the
Gate Array (B) and printed.
Code Terminal No. I/O Name and function
RTCH 60 O Number of transfers of EOL detected by IDP201 during RTC receiving is
RTCL 61 O
reflected at the terminal.
- SERVICE MANUAL 1
- FACSIMILE 1
- CONTENTS 3
- [1] Specifications 4
- 28 29 30 31 32 33 5
- 40393837363534 5
- CHAPTER 2. ADJUSTMENTS 9
- MEMORY CLEAR ? 10
- 1) Soft switch mode 11
- 2) Print area 11
- 3) ROM & RAM check 11
- After setup of the document 12
- Only the sensor which is 12
- SPEED key SXXX XXX 13
- : Speed key number 13
- 2-2. Print diagnosis 15
- • Blank paper aging mode 15
- • SW1 to SW30 : For line 1 17
- • SW31 to SW60 : For line 2 17
- 4. Soft switch description 18
- • Soft switch 18
- [3] Troubleshooting 44
- [4] Error code table 45
- Super G3 mode 46
- 2. Service call error massage 46
- Wire treatment 52
- [1] Block diagram 53
- [2] Wiring diagram 54
- [1] Circuit description 57
- (8) Gate Array (B) Block 64
- (9) CODEC Block 66
- (10) Page Memory Block 69
- (11) Driver Block 70
- (12) DPRAM I/F Block 71
- 1. General description 72
- (1) Sub CPU Block 72
- (2) Modem Block 75
- (8) JBIG Block 80
- IC3: VHiM65761FP-1(M65761FP) 80
- CPU & memory block 82
- Flash memory block 3/16 84
- Reading block 4/16 85
- Gate array (B) block 7/16 88
- Codec block 8/16 89
- Page memory block 9/16 90
- Other block 14/16 95
- Connector block 1 15/16 96
- FO-6700U 100
- Modem block 2/7 101
- Gate array block 3/7 102
- QM-coder block 4/7 103
- Dual port RAM block 5/7 104
- Access control block 6/7 105
- Connector block 7/7 106
- LIU PWB parts layout 109
- Printer PWB circuit 2/2 111
- T1 7 8 – 9 114
- T1 2 – 3 114
- Power Supply PWB parts layout 115
- High Voltage PWB parts layout 119
- Toner Empty PWB parts layout 120
- Memory PWB circuit 2/3 126
- Memory PWB circuit 3/3 127
- [1] G3 Protocol 129
- [2] Super G3 Protocol 130
- [3] Power On Sequence 131
- CHAPTER 8. OTHERS 132
- 2. Description 133
- For inspection 135
- [2] IC Signal Names 137
- 8 7 5 8 B 138
- PRINTER PWB UNIT 139
- 16 15 14 13 12 11 10 9 142
- 1 2 3 4 5 6 7 8 142
- 1C 2C 3C 4C 5C 6C 7C COM 142
- 1B 2B 3B 4B 5B 6B 7B E 142
- PARTS GUIDE 143
- [12] 2nd.Cassette (1) 158
- I n d e x 184
- © 2000 BY SHARP CORPORATION 192
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