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General Category => Amstrad CPC hardware => Topic started by: itfiddler on 10:00, 07 September 24

Title: Amstrad CPC 464 fault
Post by: itfiddler on 10:00, 07 September 24

I have a CPC 464, a CPC 6128 and only one monitor. The CPC 6128 looks perfect on the monitor but with the CPC 464 the image is shifted upwards. Any hints on what should be checked?

CPC 464
(https://i.postimg.cc/21fyS6Q4/CPC-monitor-issue.jpg) (https://i.postimg.cc/NjKHb2LP/CPC-monitor-issue.jpg)
Title: Re: Amstrad CPC 464 fault
Post by: McArti0 on 10:33, 07 September 24
Is this a CRT or LCD monitor?
If it's LCD, have you tried turning on autoconfiguration (sometimes called autoscan)?
Title: Re: Amstrad CPC 464 fault
Post by: Bryce on 14:07, 07 September 24
The rounding at the top would suggest that it's a CRT, probably an Amstrad monitor. Have you tried adjusting the v-hold?

Bryce.
Title: Re: Amstrad CPC 464 fault
Post by: itfiddler on 17:06, 07 September 24
Quote from: McArti0 on 10:33, 07 September 24Is this a CRT or LCD monitor?
If it's LCD, have you tried turning on autoconfiguration (sometimes called autoscan)?
Sorry, I forgot to mention that this is the Amstrad CRT color monitor I bought with the CPC 6128.
Title: Re: Amstrad CPC 464 fault
Post by: itfiddler on 17:09, 07 September 24
Quote from: Bryce on 14:07, 07 September 24The rounding at the top would suggest that it's a CRT, probably an Amstrad monitor. Have you tried adjusting the v-hold?

Bryce.
Yes, it is a CRT monitor, thanks Bryce. You mean adjust V-Hold of the CRT monitor? If so, why would it works perfectly with the CPC 6128 and only notice the vertical shift when tested with the CPC 464?
Title: Re: Amstrad CPC 464 fault
Post by: McArti0 on 17:44, 07 September 24
type on 464:

BORDER 12 (and press ENTER)

Make Photo whole monitor.

out&bc00,7:out&bd00,30

Make Photo whole monitor.

out&bc00,4:out&bd00,38

Make Photo whole monitor.
Title: Re: Amstrad CPC 464 fault
Post by: Bryce on 12:56, 08 September 24
Quote from: itfiddler on 17:09, 07 September 24
Quote from: Bryce on 14:07, 07 September 24The rounding at the top would suggest that it's a CRT, probably an Amstrad monitor. Have you tried adjusting the v-hold?

Bryce.
Yes, it is a CRT monitor, thanks Bryce. You mean adjust V-Hold of the CRT monitor? If so, why would it works perfectly with the CPC 6128 and only notice the vertical shift when tested with the CPC 464?

Yes, because no two setups are identical. Even a slightly different resistance or capacitance on the monitor cable (Sync signal) or the GA socket condition can change things.

Bryce.
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