Just bought a DoA Phaser 7800 GX

[adriansto]

Re: Just bought a DoA Phaser 7800 GX

There is UART port for debugging on IP board - page 6-24 from service manual.
May be you show some informations about boot process.

[rrutter81]

Re: Just bought a DoA Phaser 7800 GX

There is UART port for debugging on IP board - page 6-24 from service manual.
May be you show some informations about boot process.

Yeah i saw that. I can pick up a ttl to usb cable. However, capturing that information seemed like a rabbithole. Im not sure if i need special software to read it or not.

Also. I found out that the hard drive that came with the machine is a toshiba 160 gig. Not a hitachi. I am starting to feel like this was an intentional sale of a bad product as the seller has stopped communicating with me.

argh

[rockdude]

Re: Just bought a DoA Phaser 7800 GX

Well from everything you have said, and from what you have replaced.

I think it breaks down to only two possible solutions.

1. The IP board which directly communicates to the control pannel. (Basically the other side of the error code telling you to replace the control pannel.)
2. Remote possibility the Motor Drive Board.

The only reason I say the motor drive, is that you said you cannot get into diagnostics. You should be able to get into diagnostics even with the IP board removed.
I would pull the IP board and see if you can get into diags.

Let us know how things go.

[rrutter81]

Re: Just bought a DoA Phaser 7800 GX

Well from everything you have said, and from what you have replaced.

I think it breaks down to only two possible solutions.

1. The IP board which directly communicates to the control pannel. (Basically the other side of the error code telling you to replace the control pannel.)
2. Remote possibility the Motor Drive Board.

The only reason I say the motor drive, is that you said you cannot get into diagnostics. You should be able to get into diagnostics even with the IP board removed.
I would pull the IP board and see if you can get into diags.

Let us know how things go.

I pulled the ip board but the control panel doesnt even light up when i do that.
I am assuming youre talking about some external software like pws?
or the uart serial port?

regards

[rrutter81]

Re: Just bought a DoA Phaser 7800 GX

So another update.
I went to a local Fry's electronics store and cobbled together a "poor man's" usb to ttl rig. After using a multimeter on the J14 connector (pins weren't labeled) and listened in, the machine gave me not much more to go on. Albeit it is expecting a command for me to send to continue the boot process which shows promise but still doesn't solve the POST error.


Timberline U-Boot 2009.11-2.7 (Aug 25 2011 - 07:49:17)

CPU: 8536E, Version: 1.2, (0x803f0092)
Core: E500, Version: 3.0, (0x80210030)
Clock Configuration:
CPU0:1333.332 MHz,
CCB:533.333 MHz,
DDR:333.333 MHz (666.666 MT/s data rate) (Asynchronous)
LBC:66.667 MHz
L1: D-cache 32 kB enabled
I-cache 32 kB enabled
Board: Xerox timberline. rev: 4.
I2C: ready
DRAM: Initializing.... DDR: 2 GB (DDR2, 64-bit, CL=5, ECC off)
RAM relocation offset: 0x800d0000
POST memory PASSED
L2: 512 KB already enabled
PCI: 32 bit, 66 MHz, sync, host, arbiter (base address f3008000)
In: serial
Out: serial
Err: serial
POST errors are hard.
MAC address: 9c:93:4e:00:d4:9a
porthos: no response from ui.

## POST ERROR: UI Error. Code: 0x6.
Enter ^C to continue booting.

Essentially the same thing the blinking LED told me.

I am starting to think the IP or the BP pwb is toast. The BP pwb is what connects the IP to the Control panel harness and acts as an intermediary. I am leaning toward the BP because the IP has never given me anything to suspect it and has always complied.

If anyone else wants to follow my steps, I got a usb to db9 cable. Then get a db9 to 5-pin j14 pin-out.
ground is pin 5 (the closest to the floor)
receive is pin 4
power is pin 3

Here are the settings from the service manual:
Screen Shot 2018-06-06 at 9.11.35 PM.jpg

Better than paying $200+ for the xerox setup



U5iqPME_d.jpg

[rrutter81]

Re: Just bought a DoA Phaser 7800 GX

So after noodling on it last night. I figured I'd let the machine continue the boot process in hopes of understanding if a motor drive board was bad or something else of that nature.

After hooking up the transmit pin to pin 1 of the serial port and starting to log it, I got this bit of information...
Before i give the long debug, I will say this:
It did print a configuration page of the printer. So it does print.

The hard drive is shot. Like. Cant even format it shot. I hooked it up to my linux box and tried to recover it but it wont respond to anything. Even a repartition order. I am not sure if i would get a UI error from it or if there is anything i need from the hard disk for it to boot, but it is toast.

The entire log can be found here:

Uploadfiles.io - capture2.txt


regards

[itchyfinger@att.net]

Re: Just bought a DoA Phaser 7800 GX

people buying used equipment from unauthorized dealers have all kind of problems. I have seen this over the years. You may feel you bought the unit for a good price, but now consider the cost of the item you have put into the unit as well as your time. Now was it really a good deal? Buy equipment from authorized dealers and use OEM supplies to ensure you get the maximum buck out of your money!!

[rrutter81]

Re: Just bought a DoA Phaser 7800 GX

people buying used equipment from unauthorized dealers have all kind of problems. I have seen this over the years. You may feel you bought the unit for a good price, but now consider the cost of the item you have put into the unit as well as your time. Now was it really a good deal? Buy equipment from authorized dealers and use OEM supplies to ensure you get the maximum buck out of your money!!

for $5000? no thanks.

ill troubleshoot it.

1500 for the unit. - paypal issuing me a partial refund
130 for control panel
70 for sd card

-possible replacements:
110 hard drive
110 bp pwb
300 ip board

im still ahead 3000

[Phil B.]

Re: Just bought a DoA Phaser 7800 GX

im still ahead 3000

but is all the aggravation worth it?

what will go south next?

how long before something else fucks up?

maybe worth it to you.... but as the other tech said .... but not to most folks.

[rrutter81]

Re: Just bought a DoA Phaser 7800 GX

but is all the aggravation worth it?

what will go south next?

how long before something else fucks up?

maybe worth it to you.... but as the other tech said .... but not to most folks.

I get it. Most people want it to just work.
To me, i want to know how it works so i dont "need" some secretive xerox tech.

I am also an engineer for general motors so this stuff is kinda small in comparison. Hiding service manuals, diagnostic software, and charging a premium just irks me inside.

So yeah. well worth it.

[adriansto]

Re: Just bought a DoA Phaser 7800 GX

So yeah. well worth it.

Nice work was done.
May be this help:

[rrutter81]

Re: Just bought a DoA Phaser 7800 GX

Nice work was done.
May be this help:

Thanks for posting.
I took an old 200 gig hard drive and threw it in the phaser and ALT booted it. It made it's own 100 meg partition but didnt take advantage of the rest of the drive. When i order another one ill make sure to sector clone it as well.

For now the printer is on my network taking commands just fine.

Ill update as i replace each part, but for now im in no rush.