Title: Apple II+/IIc/IIe/IIgs/III Computers
Post by: channelmaniac on September 16, 2008, 12:53:37 AM
Subject: Diagnosing RAM errors on Apple IIc/IIe
The Apple IIc and IIe computers have built in diagnostic routines that can be enabled by pressing the Ctrl-Open Apple-Closed Apple-Reset key combination. Depending on the system ROM it will either emit a high pitched squeal followed by a series of high resolution colored screens or will have a series of low resolution colored blocks.
If yours has the series of low res blocks then it will have the newer ROMs which will do the test much faster to completion.
If an error is found there will be a set of 8 zeros and ones. Where there is a 1 it will point to a bad RAM IC on the motherboard.
If there is an asterisk (*) next to the numbers it signifies that the bad RAM is in the 64k to 128k upper memory range on the Apple IIc or on the 80 column card in an Apple IIe.
Run the test again after replacing the bad IC. Do not be surprised to find additional RAM chips that are bad! The test stops as soon as it finds a bad chip so the test will have to be run again and again until it tests with no errors.
If you want to do a continuous memory test to "burn in" the system simply leave the keyboard unhooked from the logic board and it will run continuously.
Enjoy!
Title: Re: Apple II+/IIc/IIe/IIgs/III Computers
Post by: channelmaniac on September 16, 2008, 12:53:56 AM
Models: Disk II and 5.25" Uni/Duo Disk drives
Symptom: Drive continuously runs. Any disk inserted gets erased.
This happens if the disk drive cables get hooked up backwards. Replace the 74LS125 IC on the Disk Drive's internal controller board.
Title: Re: Apple II+/IIc/IIe/IIgs/III Computers
Post by: channelmaniac on September 16, 2008, 12:54:10 AM
Model: Apple II+/IIe
Symptom: Will not power on
Replaced a 22ohm resistor & a nearby small electrolytic cap in power supply. This is a common problem on the non-Astec model supplies.
Title: Re: Apple II+/IIc/IIe/IIgs/III Computers
Post by: channelmaniac on September 16, 2008, 12:54:29 AM
Model: Apple II+/IIe
Symptom: Dead - no power.
Power supply tested good. The +12v line was shorted to ground causing the power supply to shut down. Replaced a shorted monolithic cap on the +12v line to fix.
Title: Re: Apple II+/IIc/IIe/IIgs/III Computers
Post by: channelmaniac on September 16, 2008, 12:55:01 AM
Model: IIc/IIc+
Symptom: Floppy disk will not spin or read
Replaced the defective IWM (Integrated Wozniak Machine) IC. This IC controls the floppy disks and is prone to dying if the drives are added or removed with the power on.
Title: Re: Apple II+/IIc/IIe/IIgs/III Computers
Post by: channelmaniac on September 16, 2008, 12:56:25 AM
Apple Custom Chip Numbers: These numbers include PALs, HALs, ROMs, PROMs, EPROMs, and custom logic chips. If you know of any that are missing, please PM me through the board and I'll add them. 324 Series:
324-0265 ??? (2732) (C)83 Apple
331 Series:
331-0931-B II+ Keyboard Controller
341 Series:
341-0001-00 II+ Integer BASIC E0
341-0002-00 II+ Integer BASIC E8
341-0003-00 II+ Integer BASIC F0
341-0004-00 II+ Integer BASIC F8 (Old Monitor ROM)
341-0009 13 Sector Drive Controller P5 ROM
341-0010 13 Sector Drive Controller P6 ROM
341-0011-D0 II+ Applesoft BASIC D0
341-0012-D8 II+ Applesoft BASIC D8
341-0013-E0 II+ Applesoft BASIC E0
341-0014-E8 II+ Applesoft BASIC E8
341-0015-F0 II+ Applesoft BASIC F0
341-0016-00 Programmer's Aid #1
341-0020-F8 II+ Applesoft BASIC F8 (Autostart Monitor ROM)
341-0027 16 Sector Drive Controller P5 ROM
341-0027-A 16 Sector Drive Controller P5 ROM
341-0028 16 Sector Drive Controller P6 ROM (Also on Apple III)
341-0028-A 16 Sector Drive Controller P6 ROM (Also on Apple III)
341-0030 III ROM (Timing logic?)
341-0031-01 III ROM (Kernel?)
341-0032-00 III ROM - Video Mode Select
341-0035 Apple III Keyboard Controller
341-0036 II+ Character ROM
341-0042 PROM - Apple III 12v Memory Board (Address Logic Section)
341-0043 PROM - Apple III (Address Logic Section)
341-0044 PROM - Apple III 12V Memory Board (Address Logic Section)
341-0045 PROM - Apple III (I/O Logic Section)
341-0046 PROM - Apple III (Timing Logic Section)
341-0055 PROM - Apple III (Address Logic Section)
341-0056 PROM - Apple III (Address Logic Section)
341-0057-5C PROM - Apple III (Paralell Printer Card)
341-0061 PROM - Apple III 5v Memory Board (Address Logic Section)
341-0062 PROM - Apple III 5v Memory Board 128K (Address Logic Section)
341-0063 PROM - Apple III 5v Memory Board 128/256K (Address Logic section)
341-0065-A Super Serial Card ROM
341-0080-B ProFile 5MB RW-Z8
341-0112-A Apple SCSI (non-HS) Revision A Firmware
341-0112-B Apple SCSI (non-HS) Revision B Firmware
341-0124-A IIGS Keyboard i8048
341-0127-A 16 Sector Drive Controller P5A ROM
341-0150-A IIe Keyboard ROM UK/USA
341-0151-A IIe Keyboard ROM Germany/USA
341-0160-A IIe Video ROM UK/USA
341-0161-A IIe Video ROM Germany/USA
341-0175-F Lisa 2 Boot ROM Hi (old)
341-0175-H Lisa 2 Boot ROM Hi
341-0176-F Lisa 2 Boot ROM Lo (old)
341-0176-H Lisa 2 Boot ROM Lo
341-0181 ??? 2716 ROM
341-0182 ??? 2716 ROM
341-0193-A Lisa Parallel Interface Card
341-0246 Apple EtherNet NB ROM
341-0265-A //c USA Character Generator ROM
341-0281-D Lisa 2/10 Disk ROM
341-0288-A Widget-10 Controller (677-0108) Z8 Piggyback
341-0289-D Widget-10 Controller
341-0290-B Lisa 2/5 Disk ROM
341-0299-B ??? (2716)
341-0346 Mac XL Boot ROM Lo
341-0347 Mac XL Boot ROM Hi
341-0437-A Apple SCSI (non-HS) Revision C Firmware
341-0660 ??? (2764)
341-0625-A //c+ Monitor ROM 05
341-0728 IIGS ROM 3 FC-FD (prototype)
341-0729 IIGS ROM 3 FE-FF (prototype)
341-0737 IIGS ROM 3 FC-FD
341-0748 IIGS ROM 3 FE-FF
341-0749 IIGS ROM 3 FE-FF (prototype)
341-0801-02 Macintosh Display Card (MDC) ROM v1.0.1 (27C128)
BIOS String: Software by Casey King, Hardware by James Lundblad and Mohammed Sritip
341-0860 ?? Printer ROM LL
341-0861 ?? Printer ROM LM
341-0862 ?? Printer ROM UM
341-0863 ?? Printer ROM UU
341-0868 Macintosh Display Card (MDC) ROM v1.2 (27c256)
341-0873 ??? (Mac Classic Boot ROM?)
341-8003-A Sun Mac XL Disk ROM for 800k drives (from 2/5)
341-8003-B Sun Mac XL Disk ROM for 800k drives (from Sun XL)
341-8003-C Sun Mac XL Disk ROM for 800k drives (from Goodwill XL)
341-8007 Sun SCSI Card
342 series:
342-0008-A ???
342-0007 ???
342-0033-A //c Monitor ROM $00
342-0034-B ImageWriter // Firmware
342-0035 KR3600-075B1 Keyboard Controller
342-0077-B IIGS ROM-01
342-0081-A LaserWriter Printer 512K Rev 2 L0 ROM
342-0082-A LaserWriter Printer 512K Rev 2 H0 ROM
342-0083-A LaserWriter Printer 512K Rev 2 L1 ROM
342-0084-A LaserWriter Printer 512K Rev 2 H1 ROM
342-0085-A LaserWriter Printer 512K Rev 2 L2 ROM
342-0086-A LaserWriter Printer 512K Rev 2 H2 ROM
342-0087-A LaserWriter Printer 512K Rev 2 L3 ROM
342-0088-A LaserWriter Printer 512K Rev 2 H3 ROM
342-0089-A LaserWriter Plus Printer 512K Rev 2 L0 ROM
342-0090-A LaserWriter Plus Printer 512K Rev 2 H0 ROM
342-0091-A LaserWriter Plus Printer 512K Rev 2 L1 ROM
342-0092-A LaserWriter Plus Printer 512K Rev 2 H1 ROM
342-0093-A LaserWriter Plus Printer 512K Rev 2 L2 ROM
342-0094-A LaserWriter Plus Printer 512K Rev 2 H2 ROM
342-0095-A LaserWriter Plus Printer 512K Rev 2 L3 ROM
342-0096-A LaserWriter Plus Printer 512K Rev 2 H3 ROM
342-0097-A LaserWriter Plus Printer 512K Rev 2 L4 ROM
342-0098-A LaserWriter Plus Printer 512K Rev 2 H4 ROM
342-0099-A LaserWriter Plus Printer 512K Rev 2 L5 ROM
342-0100-A LaserWriter Plus Printer 512K Rev 2 H5 ROM
342-0101-A LaserWriter Plus Printer 512K Rev 2 L6 ROM
342-0102-A LaserWriter Plus Printer 512K Rev 2 H6 ROM
342-0103-A LaserWriter Plus Printer 512K Rev 2 L7 ROM
342-0104-A LaserWriter Plus Printer 512K Rev 2 H7 ROM
342-0132 IIe and //c Keyboard ROM USA (2716)
342-0132-A IIe and //c Keyboard ROM USA (2716)
342-0132-B IIe (and //c) Keyboard ROM USA rev DVORAK, pad (2716)
342-0132-C IIe (and //c) Keyboard ROM USA (2716)
342-0132-D //c Keyboard ROM USA (2716)
342-0133-A IIe Video (Character Generator) ROM
342-0134-A IIe EF ROM
342-0135-A IIe CD ROM
342-0135-B IIe CD ROM
342-0220-B Mac 64k Boot ROM (Lo?)
342-0221-B Mac 64k Boot ROM (Hi?)
342-0272-A //c Monitor ROM FF
342-0273-A //c, //e (Enhanced) Char Gen UK
342-0275-A //c //e (Enhanced) Character Generator ROM Germany
342-0297-H0 ? Printer H0 ROM
342-0303 //e (Enhanced) EF ROM
342-0303-A //e Enhanced EF EPROM (2764)
342-0304 //e (Enhanced) CD ROM
342-0309-H1 ? Printer H1 ROM
342-0310-H2 ? Printer H2 ROM
342-0311-H3 ? Printer H3 ROM
342-0312-H4 ? Printer H4 ROM
342-0313-H5 ? Printer H5 ROM
342-0314-H6 ? Printer H6 ROM
342-0315-H7 ? Printer H7 ROM
342-0316-L0 ? Printer L0 ROM
342-0317-L1 ? Printer L1 ROM
342-0318-L2 ? Printer L2 ROM
342-0319-L3 ? Printer L3 ROM
342-0320-L4 ? Printer L4 ROM
342-0321-L5 ? Printer L5 ROM
342-0322-L6 ? Printer L6 ROM
342-0323-L7 ? Printer L7 ROM
342-0341-B Mac Plus ROM Lo
342-0341-A Mac Plus ROM Hi
342-0349-A //e (Platinum) CF ROM
342-0359-A LaserWriter Printer 1M Rev 47 L0 ROM
342-0360-A LaserWriter Printer 1M Rev 47 H0 ROM
342-0361-A LaserWriter Printer 1M Rev 47 L1 ROM
342-0362-A LaserWriter Printer 1M Rev 47 H1 ROM
342-0363-A LaserWriter Plus Printer 1M Rev 47 L0 ROM
342-0364-A LaserWriter Plus Printer 1M Rev 47 H0 ROM
342-0365-A LaserWriter Plus Printer 1M Rev 47 L1 ROM
342-0366-A LaserWriter Plus Printer 1M Rev 47 H1 ROM
342-0367-A LaserWriter Plus Printer 1M Rev 47 L2 ROM
342-0368-A LaserWriter Plus Printer 1M Rev 47 H2 ROM
342-0369-A LaserWriter Plus Printer 1M Rev 47 L3 ROM
342-0370-A LaserWriter Plus Printer 1M Rev 47 H3 ROM
342-0371-A LaserWriter Plus Printer 512k Rev 47 L0 ROM
342-0372-A LaserWriter Plus Printer 512k Rev 47 H0 ROM
342-0372-A //e (Enhanced) KB ROM Germany/USA
342-0373-A LaserWriter Plus Printer 512k Rev 47 L1 ROM
342-0374-A LaserWriter Plus Printer 512k Rev 47 H1 ROM
342-0375-A LaserWriter Plus Printer 512k Rev 47 L2 ROM
342-0376-A LaserWriter Plus Printer 512k Rev 47 H2 ROM
342-0377-A LaserWriter Plus Printer 512k Rev 47 L3 ROM
342-0378-A LaserWriter Plus Printer 512k Rev 47 H3 ROM
342-0379-A LaserWriter Plus Printer 512k Rev 47 L4 ROM
342-0380-A LaserWriter Plus Printer 512k Rev 47 H4 ROM
342-0381-A LaserWriter Plus Printer 512k Rev 47 L5 ROM
342-0382-A LaserWriter Plus Printer 512k Rev 47 H5 ROM
342-0383-A LaserWriter Plus Printer 512k Rev 47 L6 ROM
342-0385-A LaserWriter Plus Printer 512k Rev 47 H6 ROM
342-0385-A LaserWriter Plus Printer 512k Rev 47 L7 ROM
342-0386-A LaserWriter Plus Printer 512k Rev 47 H7 ROM
342-0445-A //c Monitor ROM $03 (memory expandable)
342-0545-A ? Printer L0 ROM
342-0546-A ? Printer H0 ROM
342-0547-A ? Printer L1 ROM
342-0548-A ? Printer H1 ROM
342-0549-A ? Printer L2 ROM
342-0550-A ? Printer H2 ROM
342-0551-A ? Printer L3 ROM
342-0552-A ? Printer H3 ROM
342-0568-A LaserWriter Printer 512k Rev 47 L0 ROM
342-0569-A LaserWriter Printer 512k Rev 47 H0 ROM
342-0570-A LaserWriter Printer 512k Rev 47 L1 ROM
342-0571-A LaserWriter Printer 512k Rev 47 H1 ROM
342-0572-A LaserWriter Printer 512k Rev 47 L2 ROM
342-0573-A LaserWriter Printer 512k Rev 47 H2 ROM
342-0574-A LaserWriter Printer 512k Rev 47 L3 ROM
342-0575-A LaserWriter Printer 512k Rev 47 H3 ROM
343 Series:
344 Series:
344-0010-B ???
344-0011-B ???
344-0020-B ???
344-0021-B ??? Also, the Applied Engineering GS-RAM III card for the Apple IIgs uses 20-pin "Zip" package 1M x 4 DRAMs (NEC D424400V-80 or OKI H5144024-70). A few other Apple II memory cards also use relatively rare Zip package RAM.
Title: Re: Apple II+/IIc/IIe/IIgs/III Computers
Post by: channelmaniac on September 16, 2008, 12:59:28 AM
Model: Apple IIgs
Symptom: Dead keyboard & mouse
This actually has two different causes/repairs.
The first is to open up the keyboard and repair cracked solder joints on the ADB (Apple Desktop Bus) ports.
If that's not it the second is to replace the 8 pin square black plastic filter network on the IIgs logic board. It is situated next to the ADB port on the back corner of the motherboard. It has 4 toroid core filters built into it. If one of the 4 filters has no continuity then the ADB port will be dead.
Title: Re: Apple II+/IIc/IIe/IIgs/III Computers
Post by: channelmaniac on December 27, 2008, 02:09:34 AM
Model: Apple II+/IIe Power Supply
Symptom: Dead.
This was the Astec version of the Apple II Power Supply.
Replaced a blown 2.75A metric size fuse and a shorted bridge rectifier. Bridge rectifier can be replaced with an NTE5319 but it will require the holes in the board to be enlarged to accomodate the larger legs of the replacement device. This replacement device has a higher current rating and should last longer than the original part.
Replaced C7, a 10v 220uf 85 deg C capacitor with a 16v 220uf 105 deg C capacitor. This cap is a common failure item and should be replaced in any Astec version Apple II+/IIe power supply.
Title: Re: Apple II+/IIc/IIe/IIgs/III Computers
Post by: channelmaniac on December 27, 2008, 02:11:42 AM
Model: IIe motherboard
Symptom: Dead. Garbage on screen.
Checked the activity on the DRAM legs with a logic probe and found they were pulsing in slow sync which was an odd pattern. Replaced the 6502 CPU and ran diagnostics on the board.
Title: Re: Apple II+/IIc/IIe/IIgs/III Computers
Post by: channelmaniac on February 22, 2009, 02:59:05 AM
Model: Apple II+/IIe power supply
Symptoms: Makes funny noises. Does not work.
Power supply was not an original Apple supply but rather a clone. Found 3 burst capacitors and 4 leaking capacitors in the output section. Replaced the bad caps and tested the rectifiers for shorts. None were found shorted. Reassembled and tested the power supply.
Title: Re: Apple II+/IIc/IIe/IIgs/III Computers
Post by: channelmaniac on May 01, 2011, 12:16:39 AM
Model: Apple II+
Symptom: Dead, Screen full of @, #, and $ symbols
Removed a 64K DRAM chip that was plugged into the DRAM socket the language card normally plugs into. This is an incorrect chip (5v only... The 16K chips are +5/-5/+12v) and was getting red hot. Replaced every 4116k DRAM as they were all blown - 23 dead DRAMs (the 24th chip being the incorrect 64k chip). Replaced a bad 74S86 at location B2.
The system would then try to boot but would fail. The address lines on the DRAMs were incorrect. Two were dead, 1 was stuck high, and 1 was racing. Replaced bad 74LS153 chips at E11, E12, and E13 to fix. Now the system would boot but drop down to the Monitor ROM. Replaced the D8 and F0 ROMs and burned in the board for several hours.
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