SpletIf I had to make a guess, and assuming good voltages, CPU -> PCF1306P multiplexer -> ULA -> RAM -> ROM in order of sensitivity and likelihood of part failure. If voltages are not right the 78S05 regulator may be blown or malfunctioning, although this is unlikely. Note that this part is different to the model using in older speccies, as it needs ... SpletPCF1306P, PCF1311D, PCF1312D datasheet.Selling leads from all over the world, Seekic is the world's biggest IC trading marketplace on the internet. We offer finest suppliers for PCF1306P, PCF1311D, PCF1312D you can also download the datasheet for PCF1306P, PCF1311D, PCF1312D.
PCF1306P NXP Semiconductors - Distributors and Price …
Splet28. jun. 2024 · Explanation is: "RAM test showed problems in low memory. I tested some chips but there were ok. I tested PCF1306P, ROM y Z-80 chips but there also were ok.Finally, I found that the scope showed some ac signal in the +12v. C44 capacitor was not working well. After C44 changed, Spectrum started well. I decided to change some electrolytic … SpletSpectrum ZXMUX PCF1306P ZX8401 AMSTRAD 40058 multiplexer replacement. Opens in a new window or tab. Brand New. $10.58. retro.care (379) 100%. Buy It Now +$5.60 shipping. from Portugal. fredrick oni
Spectrum ZXMUX PCF1306P ZX8401 AMSTRAD 40058 …
SpletWith the arrival of the Spectrum 48K revision ISSUE 5, a new chip appeared that performed functions that in previous ISSUES were performed by the 74LSxx chip. This new chip is … SpletZX8401,/Ithyphallus1420733.html,40058,PCF1306P,Computers/Tablets & Networking , Vintage Computing , Other Vintage Computing,Spectrum,replace,$5,tahs-school.com,AMSTRAD,ZXMUX,multiplexer Spectrum Genuine Free Shipping ZXMUX PCF1306P ZX8401 AMSTRAD multiplexer 40058 replace $5 Spectrum ZXMUX … SpletPCF 1306p ,AMSTRAD 40058 ,zx8401 replacement board Replacement board for faulty PCF1306p, ZX8401,AMSTRAD 40058. New, tested on my 128 toastrack, 128+2 grey and Just Speccy 128k. White (for... fredrick otieno