Canon Cat (V777): Difference between revisions

Preliminary Information
Leak Risk	RIFA caps in power supply pose risk of sudden failure. Other PSU caps have been known to leak as well.
Batteries	CR2023
Mounting Technology	Through Hole
Destructive Entry	No
Hardware Specifications
CPU	Motorola 68000 @ 5 MHz
Memory Capacity	256 KB
Storage	3½-inch 256 KB floppy disk drive (proprietary cable)
Graphics	9-inch (229 mm) black-and-white monitor
Sound	Piezo speaker
Power Requirements
Input Voltage	115/230 VAC
Current (Amps)	+5VDC: 2.5A max +12VDC: 2.0A max -12VDC: 0.1A max
Power Connector	Molex P/N 09-50-3031

VisualWikitext

Latest revision as of 23:39, 27 April 2024

For more information, see this article's corresponding Wikipedia page: Canon_Cat.

This device is in the WorkNeeded:OriginalParts category because it was flagged as missing information on the original parts. It may have replacement parts listed but those cannot be assumed to be identical to the originals. If you have a list of the original parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables

This device is in the WorkNeeded:ReplacementParts category because it was flagged as missing information on replacement parts. If it has the original parts listed you may be able to search for replacements using the parametric searches available from parts distributors. If you have or make a list of replacement parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables

Known Issues

Symptom or Problem Encountered

Floppy disk drive is a proprietary model not interchangeable with any other known computer. Drive head mounting brackets have almost certainly failed. Damage will occur to drive if used with a broken bracket. Recommend inspecting drive and disconnecting to prevent use until plastic bracket is replaced.

Causes

Solutions

Disassembly Notes

Four Phillips screws on back to remove monitor shroud.

Four Phillips screws on bottom to remove motherboard assembly. (Does not require prior removal of monitor shroud.)

Six Phillips screws to remove metal shroud from motherboard assembly.

The power supply may have its serial number and build date on a paper label attached to capacitor C17. It will probably not be possible to remove this paper label without damaging it. Instead, after desoldering C17 cut the plastic shroud away from the capacitor and trim to the dimensions of the paper label. Attach the label to the outside of the PSU with double-sided tape for easy reference.

The power supply will have an important warning about a live heatsink attached to capacitor C6. It is not possible to remove this paper label without damaging it. Instead, after desoldering C6 cut the plastic shroud away from the capacitor and trim to the dimensions of the warning label. Attach the label to the outside of the PSU with double-sided tape for so that it can be easily seen.

Original Parts

Motherboard NH1-0300-035

Capacitor Specifications and Footprint Information
RefDes	Qty	Capacitance	Voltage	Mount	Brand
C94	1	1 µF	50	Radial
C76	1	1 µF	50	Radial	Panasonic
C80	1	17 µF	25	Radial
C92	1	33 µF	16	Radial
C13	1	47 µF	10	Radial	Nichicon
C90	1	47 µF	25	Radial	Rubycon
C79	1	100 µF	16	Radial
C77	1	100 µF	16	Radial	Rubycon
C2	1	100 µF	25	Radial
C72	1	100 µF	25	Radial	Rubycon
C73	1	100 µF	25	Radial	Rubycon
C1	1	220 µF	25	Radial	Rubycon

Integrated Circuits
RefDes	Qty	Model	Manufacturer	Package	Explanation	Datasheet
PC1	1	PC733H	Sharp	DIP	AC Input Photocoupler	PC733H
IC10, IC32	2	HD74LS05P	Hitachi	DIP	Hex Inverter with Open-Collector Output	SN74LS05
IC11	1	D4364C-15LL	NEC	DIP	8192 x 8-Bit SRAM (CMOS)	uPD4364
IC12	1	SN74128N	Texas Instruments	DIP	Line Driver	SN74128
IC22, IC23, IC24, IC25, IC26, IC27, IC28, IC29,	8	MB81464-15		DIP	144-Bit DRAM	MB81464
IC33	1	HD74LS132P	Hitachi	DIP	Quad 2-Input Positive-NAND Schmitt Trigger	SN74LS132
IC34	1	MC68681P	Motorola	DIP	DUART	MC68HC681
IC35	1	UA1488PC		DIP	RS-232C Line Driver	UA1488 (Alternate)
IC37	1	S35213	AMI Semiconductor (Now ON Semiconductor)	DIP	Modem(?)
	1	S35212A	AMI Semiconductor (Now ON Semiconductor)	DIP	Modem Support Circuitry(?)
IC39	1	4558	NEC	DIP	Dual Op-Amo	RC4558
IC40	1	S2579-084	AMI Semiconductor (Now ON Semiconductor)	DIP	DTMF Tone Generator with Binary Input	S2579
IC42	1	7905	NEC	TO-220	Negative-Voltage Linear Voltage Regulator	7905
IC43	1	MB3771		DIP	Power Supply Monitor	MB3771
IC100	1	SN74LS74AN	Texas Instruments	DIP	Dual D-Type Positive-Edge-Triggered Flip-Flop	SN74LS74

Power Supply board ASTEC AC8151-01

Datasheet (courtesy Bitsavers)

The table below was compiled from power supply Serial #: M286537666, with a date code of 1987-09.

Capacitor Specifications and Footprint Information
RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Type	Brand	Series	Note
C1, C11	2	0.01 µF	250VAC	Film	17mm L x 5mm D	10mm	16mm OR 10mm	110° C	SAFETY X2	RIFA	PME 271 M
C3, C4	2	0.0047 µF	250VAC	Film	13mm L x 4mm D	10mm	16mm OR 10mm	100° C	SAFETY Y	RIFA	PME 271 Y
C6	1	100 µF	250	Radial	18mm	42mm	8mm	105° C		CE?	GM	Label: "Caution. Hazard of Electric Shock - Heatsink is Live. Disconnect Power Supply before Servise [sic]"
C7	1	100 µF	250	Radial	18mm	42mm	8mm	105° C		CE?	GM
C8	1	220 µF	10	Radial	10mm	22mm	5mm	105° C		Nippon Chemi-Con	RX	Heatshrink tubing
C15, C16	2	1000 µF	16	Radial	16mm	26mm	5mm OR 8mm	105° C		Nippon Chemi-Con	SXA	Leaking
C17	1	1000 µF	16	Radial	16mm	26mm	5mm OR 8mm	105° C		Nippon Chemi-Con	SXA	Leaking; labeled with power supply serial # and date code.
C18	1	330 µF	16	Radial	10mm	21mm	5mm	105° C		Nippon Chemi-Con	SXA
C19	1	330 µF	16	Radial	10mm	16mm	5mm	85° C		Nippon Chemi-Con	SM
C20	1	470 µF	16	Radial	12mm	13mm	5mm OR 8mm	85° C		Acess

CRT Analog Board Matsushita PANP 30901

Capacitor Specifications and Footprint Information
RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Height	Lead Spacing	Temp	Brand	Series	Notes
C404	1	470 µF	16	Radial	10mm	13mm		85° C	Nippon Chemi-Con	SU
C406	1	10 µF	16	Radial	5mm	12mm		85° C	Nippon Chemi-Con	SU
C407	1	33 µF	6.3	Radial	5mm	12mm		85° C	Nippon Chemi-Con	SU
C408	1	220 µF	16	Radial	8mm	12mm	5mm	85° C	Nippon Chemi-Con	SU
C409	1	470 µF	16	Radial	10mm	12mm	5mm	85° C	Nippon Chemi-Con	SU
C411	1	2200 µF	16	Radial	13mm	25mm	5mm	85° C	Nippon Chemi-Con	CE SU
C413	1	47 µF	16	Radial
C505	1	4.7 µF	25	Radial	5mm	12mm		85° C	Nippon Chemi-Con	SU
C512	1	330 µF	16	Radial	8mm	12mm	5mm	85° C	Nippon Chemi-Con	SU
C514	1	1000 µF	16	Radial	10mm	20mm		85° C	Nippon Chemi-Con		Glued to C513
C516	1	10 µF	350	Radial	13mm	25mm		85° C	Nippon Chemi-Con	CE S
C517	1	100 µF	50	Radial	14mm	28mm					Glued to L502
C518	1	220 µF	63	Radial	10mm	20mm	5mm	85° C	Nippon Chemi-Con
C519	1	1 µF	350	Radial	8mm	25mm		85° C	Nippon Chemi-Con
C532	1	10 µF	63	Radial							On CRT Neck Board
C801	1	3300 µF	16	Radial	15mm	25mm		85° C	Nippon Chemi-Con	CE SU	Elevated 10mm to clear C505 & C404

Replacement Parts

Basic PCB Name

Capacitors
RefDes	Qty	Compatible Part Number	Order Links
C19	1	860020373011 / 16YXF330MFFCT78X11.5	Digikey Mouser LCSC
C20	1	860020374012 / 16YXJ470MFFCT78X11.5	Digikey Mouser LCSC

Integrated Circuits
RefDes	Qty	Compatible Part Number	Order Links
PC1	1	IS733X	DigiKey
IC10, IC32	2	SN74LS05N	DigiKey Mouser LCSC
IC12	1	SN74128N	DigiKey Mouser
IC33	1	SN74LS132N / XD74LS132	DigiKey Mouser LCSC
IC34	1		DigiKey Mouser LCSC
IC35	1	MAX1488ECPD+ / MC1488N	DigiKey Mouser LCSC
IC39	1	RC4558P / UTC4558	DigiKey Mouser LCSC
IC42	1	L7905CV / L7905CV-JSM	DigiKey Mouser LCSC
IC43	1		DigiKey Mouser LCSC
IC100	1	NTE74LS74A / SN74LS74AN /	DigiKey Mouser LCSC

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

References

@@ Line 220: / Line 220: @@
 !Manufacturer
 !Package
+!Explanation
 !Datasheet
 |-
@@ Line 227: / Line 228: @@
 |Sharp
 |DIP
+|AC Input Photocoupler
 |[https://media.digikey.com/pdf/Data%20Sheets/Sharp%20PDFs/PC733H.pdf PC733H]
 |-
@@ Line 234: / Line 236: @@
 |Hitachi
 |DIP
+|Hex Inverter with Open-Collector Output
 |[https://www.ti.com/lit/ds/symlink/sn74ls05.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1712878985654&ref_url=https%253A%252F%252Fwww.ti.com%252Fgeneral%252Fdocs%252Fsuppproductinfo.tsp%253FdistId%253D10%2526gotoUrl%253Dhttps%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Fsn74ls05 SN74LS05]
 |-
@@ Line 241: / Line 244: @@
 |NEC
 |DIP
+|8192 x 8-Bit SRAM (CMOS)
 |[https://download.datasheets.com/pdfs/2006/05/26/semi_ap/cs/nec/ds/upd4364c-15l.pdf uPD4364]
 |-
@@ Line 248: / Line 252: @@
 |Texas Instruments
 |DIP
+|Line Driver
 |[https://www.ti.com/lit/ds/symlink/sn74128.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1712810042470&ref_url=https%253A%252F%252Fwww.ti.com%252Fgeneral%252Fdocs%252Fsuppproductinfo.tsp%253FdistId%253D10%2526gotoUrl%253Dhttps%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Fsn74128 SN74128]
 |-
@@ Line 255: / Line 260: @@
 |
 |DIP
+|144-Bit DRAM
 |[https://www.datasheetarchive.com/pdf/download/distributors/Datasheets-12/DSA-233346.pdf?h=db08f1b0ae6d64f999d63b82b4960ffc%3Ae92f169617779d43b2218b6349a716b8509212db33e4d7bb8da8%3A388c8b9a1ebb54c7c4ab90fbabe80f26#toolbar=0 MB81464]
 |-
@@ Line 262: / Line 268: @@
 |Hitachi
 |DIP
+|Quad 2-Input Positive-NAND Schmitt Trigger
 |[https://www.ti.com/lit/ds/symlink/sn74ls132.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1712863435209&ref_url=https%253A%252F%252Fwww.ti.com%252Fgeneral%252Fdocs%252Fsuppproductinfo.tsp%253FdistId%253D10%2526gotoUrl%253Dhttps%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Fsn74ls132 SN74LS132]
 |-
@@ Line 269: / Line 276: @@
 |Motorola
 |DIP
+|DUART
 |[https://www.nxp.com/docs/en/user-guide/MC68681UM.pdf MC68HC681]
 |-
@@ Line 276: / Line 284: @@
 |
 |DIP
-|[https://www.datasheets360.com/pdf/-3398275511888323216 UA1488]
+|RS-232C Line Driver
+|[https://www.datasheets360.com/pdf/-3398275511888323216 UA1488] ([https://www.web-bcs.com/pdf/Fd/uA/uA1488.pdf Alternate])
 |-
 |IC37
@@ Line 283: / Line 292: @@
 |AMI Semiconductor (Now ON Semiconductor)
 |DIP
+|Modem(?)
 |
 |-
@@ Line 290: / Line 300: @@
 |AMI Semiconductor (Now ON Semiconductor)
 |DIP
+|Modem Support Circuitry(?)
 |
 |-
@@ Line 297: / Line 308: @@
 |NEC
 |DIP
+|Dual Op-Amo
 |[https://www.ti.com/lit/ds/symlink/rc4558.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1712881759388&ref_url=https%253A%252F%252Fwww.ti.com%252Fgeneral%252Fdocs%252Fsuppproductinfo.tsp%253FdistId%253D10%2526gotoUrl%253Dhttps%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Frc4558 RC4558]
 |-
@@ Line 304: / Line 316: @@
 |AMI Semiconductor (Now ON Semiconductor)
 |DIP
+|DTMF Tone Generator with Binary Input
 |[https://www.datasheetarchive.com/pdf/download/distributors/Datasheets-309/67049.pdf?h=07c028e76276af852bb8b301b758df73%3A815e29dc1ec1040482f203d3%3A233f0ec0fdedbef263ea728b209274ef#toolbar=0 S2579]
 |-
@@ Line 311: / Line 324: @@
 |NEC
 |TO-220
-|
+|Negative-Voltage Linear Voltage Regulator
+|[https://www.ti.com/lit/ds/symlink/lm79.pdf 7905]
 |-
 |IC43
@@ Line 318: / Line 332: @@
 |
 |DIP
+|Power Supply Monitor
 |[https://www.mouser.com/datasheet/2/100/002-08511_MB3771_Power_Supply_Monitor-933915.pdf MB3771]
 |-
@@ Line 325: / Line 340: @@
 |Texas Instruments
 |DIP
-|
+|Dual D-Type Positive-Edge-Triggered Flip-Flop
+|[https://www.ti.com/lit/ds/symlink/sn74ls74a.pdf?ts=1714184851156&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FSN74LS74A SN74LS74]
 |}
@@ Line 556: / Line 572: @@
 |8mm
 |12mm
-|
+|5mm
 |85° C
 |
@@ Line 570: / Line 586: @@
 |10mm
 |12mm
-|
+|5mm
 |85° C
 |
@@ Line 584: / Line 600: @@
 |13mm
 |25mm
-|
+|5mm
 |85° C
 |
@@ Line 626: / Line 642: @@
 |8mm
 |12mm
-|
+|5mm
 |85° C
 |
@@ Line 682: / Line 698: @@
 |10mm
 |20mm
-|
+|5mm
 |85° C
 |