Last update:June. 7, 1999
You are visitor 
since Mar. 18, 1998.
This page is intended to support users who cannot buy "DOPING MAC", ISBN4-8211-0542-X, because they neither live in Japan nor can read Japanese at all. All questions about PowerColorClassics will be answered on the Q&A page in English even if the questions are written in Japanese. Regrettably, other questions than PowerColorClassics will not be answered by any means.
Cautions :
- Please do not copy or distribute a part of or all contents of this home page
- You can use the technology shown here only for your personal modification of your own Macs.
- DO NOT use it on a commercial basis!
- Do not try any modifications, if you do not agree with our terms as follows;
- The modification may be dangerous for your life and health. High voltage may remain around the CRT and so on. CRT may explode. These may cause injury or even lethal damage may fall on you.
- There is no insurance for your modifications. If you modify anything on your Mac, you will lose the insurance from Apple Computer, Inc.
- You should try the modifications at your own risk. The modifications mentioned here are dangerous. I and our club cannot owe any responsibility to the results of your modification.
- You should not try the modifications with insufficient knowledge. You should know the mechanism of your Mac computers, some knowledge on electronics and tools, and what you are going to do on your Macs.
- You should give up any modifications, if you do not think you can do it by yourself.
- If you think something is wrong, do not hesitate to reverse the modifications. Even if the modification is right, your Mac may get out of order because of the individual difference. If you feel any noises or smell you never had before, turn off the switch immediately and examine closely. If you find something wrong, reverse the modifications at once.
- Do you really think the modification you are going to do is the best way? You should be cool before you start the modification. Can't you buy newer Macs with the cost for the modifications?
Copyright 1997, 1998 CCSCC (Club for Creating the Strongest ColorClassics)
English translation : Copyright 1998 Yoshihisa Sugimoto
Contents
Preface
Go Top
PowerColorClassic, which is called as Takky in other name, is a variation of modified ColorClassic which has a logic board from LC630/580 or Performa 5XXX/6XXX series. Takky shows much more performance than PowerMystic does when one uses a PCI logic board. The main difference from Mystic is the size of a logic board. A logic board of LC630 series is larger than that of LC575 by 4 cm. This means that you have to work on a chassis of ColorClassic to keep a logic board within the case.
This conversion enables ColorClassics to use a logic board from LC (Performa) 630/580, PowerMacintosh (Performa) 62XX/63XX and 52XX/53XX. You can use PowerMacintosh 6300/160, 54XX and 64XX logic boards which has PCI bus slots if you add a 3.3 Volts supply from the existing power supply unit.
How to Modify
Connector wiring
Go Top
See Takky connector correlation tables.
-
The most important works for the conversion to Takky is connector wiring. You have to transplant a connector from an LC630 or so on to a ColorClassic. In this article we call this connector as '630 connector'.
First of all you start from extracting a connector from LC630.
- Remove a back panel.
- Extract a logic board.
- Remove a front bezel.
- Remove a rear panel.
- Remove a top cover with sliding it frontward.
- Remove a shield panel with sliding it frontward. Take care as an FDD cable is fixed to the shield panel.
- Remove a front control panel and disconnect a connector.
- Remove FDD and CD-ROM drives unscrewing securing screws from brackets.
- Disconnect all the connectors.
- Remove a shield case which fixes a '630 connector'.
- Remove the '630 connector' from the shield case.
- Connector wiring to analog board
See 630 & Analog board connector correlation table.
Go Top
- Dismantle an analog board connector from a ColorClassic.
- Remove a cable cover from the connector using small minus tip driver. Do not remove power supply cables P1 - P10.
- Remove a flat cable to the '630 connector'. Do not remove power supply cables P1 - P6 and P9 - P12 and cut the power cables to appropriate length.
- Attach the cables from '630 connector' to the CC analog board connector.
- Push button board connector wiring
See 630 & Push button connector correlation table.
Go Top
- Attach the push button board connector cable No. 1 - 10 to the '630 connector' pin number F21 - 29.
- Cut the 6th cable and attach the 10th cable to the F26 pin of the '630 connector'.
- FDD connector wiring
See 630 & FDD connector correlation table.
Go Top
- Attach the FDD connector cables of CC (No. 1 - 20) to the F1 to F20 pins of the '630 connector'.
- Cut the the 9 the cable of the CC FDD connector cables to the '630 connector' and leave the cable open.
- HDD connector wiring
Go Top
- Attach the HDD connector cable of CC to the '630 connector'.
- You can use either SCSI or IDE HDD's. If you decide to use a SCSI HDD, attach the SCSI connector cables (No. 1 - 50) to the A1 to A50 pins of the '630 connector'. If you select an IDE HDD, attach the IDE connector cables (No. 1 - 40) to the C11 to C50 pins of the '630 connector'.
VGA display
Go Top
Since 630 series logic boards support the VGA mode, the modification to the VGA mode is recommended. In this section the procedure to the VGA mode will be explained.
Analog board modification
Go Top
Caution: This chapter does not include the modification to the VGA mode.
The 630 series logic boards require -12 Volts of power supply to the S1 pin. However, the boards do not use -12 Volts directly but regulate -12 Volts to -5 Volts. So if the minus power supply more than -7 Volts is satisfactory. The -10 Volts will be supplied through S1 pin by modifying analog board.
Caution: Since the ordinary output of S1 pin of the analog board is -5 Volts, the the logic boards like ColorClassic / CC II or LC575 will be broken by connecting an analog board modified with this method.
- Remove the Jumper line J19 on the analog board.
- Connect the input terminal, which is connected to LP14, of the negative voltage regulator (L7905) at IP8 to the line from the S1 pin of the connector.
Chassis modification
Go Top
An LC630 logic board will work after modification of the connectors and the analog board. Although the '630 connector' has a different structure from the ColorClassic connector, the size of both connectors are the same. The direct replacement of the connector is possible but the tail of the logic board will be stuck out by 4 cm. If you want a smart Takky, you should modify the chassis to keep the board within the case.
- Remove all the structures at the deepest part of the lower chassis where a logic board locates.
- Shave the stopper of the logic board.
- Shave the parts which secure the '630 connector'. Shave the both ends of the '630 connector' by 1 mm each.
When one intends to remove a logic board, he must dismantle the ColorClassic thoroughly in this type of modification. It is recommended to fix the '630 connector' somehow.
Back panel
Go Top
You may create a back panel from an acrylic board or may modify an existing back panel of LC630 or so on. The latter seems easier.
Assembly of Takky
Go Top
Before assembly you must check thoroughly the connectors, analog board or so on where some modifications are performed. Certify electrical connections or isolation using a circuit tester, if possible.
- Locate the '630 connector'.
- Fix the hard and floppy disk drives and the speaker.
- Insert the logic board to the connector.
- Attach the shield cover on the chassis.
- Attach the chassis to the front bezel.
- Attach the analog boards and connect all the lines and connectors.
- Attach the rear cover.
Boot up and trouble shooting
Boot up
Go Top
Connect a keyboard, mouse and power supply cable to the Takky and boot up. If you can boot up your Takky smoothly, check up following points;
- Color of the screen.
- Read/write of HDD.
- Read/write of FDD.
- Front power indicator lamp, controller buttons of sound and screen contrast.
- Sound output. Check each sound channel preferably.
- Microphone input.
Trouble shooting
Go Top
When some troubles take place, you should check wiring and the points where you made modifications.
- Takky won't boot up even if you push the power key.
- Check the S3 line of the '630 connector'.
- Check the P1 - P12 lines of the '630 connector'.
- Takky seems to boot up but the display shows nothing.
- Check the S9, S11, S13, S15, S17, S19 - S21 and S23 lines of the '630 connector'.
- No sounds are heard.
- Check the modification points on the analog boards. Certify if the S1 line of the '630 connector' outputs -10 Volts.
- If the GND line of the lower surface of the logic board does not touch the shield of the chassis, let them touch.
- Check the F26 and F27 lines of the '630 connector'.
- Check the S29, S31 and S33 lines of the '630 connector'.
- Screen distorts.
- Refer to the adjustment section of Mystic.
- Screen displays strange colors.
- The cause may be a bad contact of the connectors of the analog board or logic board. Clean up the connectors thoroughly.
- Check the S13, S15 and S17 lines of the '630 connector'.
- Power indicator lamp does not illuminate.
- Check the F26 and F29 lines of the '630 connector'.
- Front control buttons for sound and screen contrast do not work.
- Check the F21 - F24 and F26 lines of the '630 connector'.
- Sound input does not work.
- Check the S35 line of the '630 connector'.
- HDD does not work properly.
- Check the C11 to C50 lines of the '630 connector' in case of an IDE hard disk, the A11 - A50 in case of a SCSI hard disk.
- Check the P1 - P12 lines of the '630 connector'.
- FDD does not work properly.
- Certify if the F9 pin of the '630 connector' is left unconnected.
Supplements
How to use PCI logic boards for Takky
Go Top
Logic boards of Performa 54XX/64XX and PowerMacintosh 6300/160 have PCI extension slots. These PCI logic boards have the same connectors as the LC630 but have an additional +3.3 Volts power supply. The modifications mentioned above will fail to boot up ColorClassic with the PCI logic boards. For the same reason you cannot boot up LC630, LC580, PowerMacintosh 6200 and 6300/120 by simply inserting PCI logic boards in to these machines.
You must make 3.3 Volts voltage supply to the logic boards from the analog board with a 3.3 Volts voltage regulator IC. Although there are some kinds of 3.3 Volts voltage regulator IC's, it is difficult find them in the market. Since some troubles concerning regulators are reported, you'd better perform this modification carefully.
3.3 Volts regulator
See Wiring diagram for PCI support.
Go Top
Rewire connectors according to the figure. You may place a regulator on a small universal board and attach the board at the corner of the chassis near the '630 connector'.
Known problems
Go Top
PCI logic boards seem to consume more power than PDS logic boards do. When using a large capacity HDD which consumes much power with a PCI logic board, the power indicator lamp became dark as the HDD was accessed. This phenomenon must be due to the insufficient power capacity. Even when an HDD of small power consumption is used, reboot failed rarely. These problems will be solved when an additional power supply is placed.
Comments and questions : sugimoto@belle.shiga-med.ac.jp