KV-1352 Video Input Hacking - Versionsgeschichte

Wolfgang: /* Possible CBVS modification */

2022-03-03T21:45:02Z

Possible CBVS modification

← Nächstältere Version		Version vom 3. März 2022, 21:45 Uhr
Zeile 150:		Zeile 150:
	* find the place where CVBS is inside the KV-1352		* find the place where CVBS is inside the KV-1352
	*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):		*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):
	*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}} {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}&~~npsp~~;{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_PCB_A_Q202_videoStage.png}}		*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}   {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}   {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_PCB_A_Q202_videoStage.png}}
	* find a method to switch between internal video and external video		* find a method to switch between internal video and external video
	*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal		*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal

Wolfgang: /* Possible CBVS modification */

2022-03-03T21:44:16Z

Possible CBVS modification

← Nächstältere Version		Version vom 3. März 2022, 21:44 Uhr
Zeile 150:		Zeile 150:
	* find the place where CVBS is inside the KV-1352		* find the place where CVBS is inside the KV-1352
	*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):		*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):
	*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_PCB_A_Q202_videoStage.png}}		*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}} {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}&npsp;{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_PCB_A_Q202_videoStage.png}}
	* find a method to switch between internal video and external video		* find a method to switch between internal video and external video
	*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal		*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal

Wolfgang: /* Possible CBVS modification */

2022-02-27T21:00:00Z

Possible CBVS modification

← Nächstältere Version		Version vom 27. Februar 2022, 21:00 Uhr
Zeile 151:		Zeile 151:
	*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):		*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):
	*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_PCB_A_Q202_videoStage.png}}		*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_PCB_A_Q202_videoStage.png}}
	* cut the connection between the Video driver stage around Q202/R222+TP12 and the downstream circuitry (cut along the red line):
	*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_PCB_A_Q202_videoStage_Cutting.png}}
	* find a method to switch between internal video and external video		* find a method to switch between internal video and external video
	*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal		*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal
	*: unfortunately, OPK102 and OPK-103 do not help here because they both do not need to switch between tuner and another video source		*: unfortunately, OPK102 and OPK-103 do not help here because they both do not need to switch between tuner and another video source
	*: if all else fails, a mechanical switch shall be used to cut the connection from Q202's collector to TP12/R307		*: if all else fails, a mechanical switch shall be used to cut the connection from Q202's collector to TP12/R307
			* cut the connection between the Video driver stage around Q202/R222+TP12 and the downstream circuitry (cut along the red line):
			*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_PCB_A_Q202_videoStage_Cutting.png}}
	* galvanically isolate the input signal from the internal electronics		* galvanically isolate the input signal from the internal electronics
	*: an opto-isolator with the necessary bandwidth must be used PLUS the galvanically isolated power supply for the circuitry driving the input side of the opto-isolator		*: an opto-isolator with the necessary bandwidth must be used PLUS the galvanically isolated power supply for the circuitry driving the input side of the opto-isolator

Wolfgang: /* Possible CBVS modification */

2022-02-27T11:44:34Z

Possible CBVS modification

← Nächstältere Version		Version vom 27. Februar 2022, 11:44 Uhr
Zeile 151:		Zeile 151:
	*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):		*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):
	*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_PCB_A_Q202_videoStage.png}}		*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_PCB_A_Q202_videoStage.png}}
			* cut the connection between the Video driver stage around Q202/R222+TP12 and the downstream circuitry (cut along the red line):
			*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_PCB_A_Q202_videoStage_Cutting.png}}
	* find a method to switch between internal video and external video		* find a method to switch between internal video and external video
	*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal		*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal

Wolfgang: /* Possible CBVS modification */

2022-02-27T11:35:59Z

Possible CBVS modification

← Nächstältere Version		Version vom 27. Februar 2022, 11:35 Uhr
Zeile 150:		Zeile 150:
	* find the place where CVBS is inside the KV-1352		* find the place where CVBS is inside the KV-1352
	*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):		*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):
	*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}		*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_PCB_A_Q202_videoStage.png}}
	* find a method to switch between internal video and external video		* find a method to switch between internal video and external video
	*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal		*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal

Wolfgang: /* Possible CBVS modification */

2021-11-19T22:16:57Z

Possible CBVS modification

← Nächstältere Version		Version vom 19. November 2021, 22:16 Uhr
Zeile 150:		Zeile 150:
	* find the place where CVBS is inside the KV-1352		* find the place where CVBS is inside the KV-1352
	*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):		*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):
	*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}		*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}
	{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}
	* find a method to switch between internal video and external video		* find a method to switch between internal video and external video
	*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal		*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal

Wolfgang: /* Possible CBVS modification */

2021-11-19T22:16:28Z

Possible CBVS modification

← Nächstältere Version		Version vom 19. November 2021, 22:16 Uhr
Zeile 151:		Zeile 151:
	*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):		*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):
	*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}		*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}
	{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg}}		{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg\|height=400px}}
	* find a method to switch between internal video and external video		* find a method to switch between internal video and external video
	*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal		*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal

Wolfgang: /* Possible CBVS modification */

2021-11-19T22:15:57Z

Possible CBVS modification

← Nächstältere Version		Version vom 19. November 2021, 22:15 Uhr
Zeile 151:		Zeile 151:
	*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):		*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):
	*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}		*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}
			{{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV1352_A_PCB_Cside_Q202_videoDriver.jpg}}
	* find a method to switch between internal video and external video		* find a method to switch between internal video and external video
	*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal		*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal

Wolfgang: /* Possible CBVS modification */

2021-11-13T16:48:46Z

Possible CBVS modification

← Nächstältere Version		Version vom 13. November 2021, 16:48 Uhr
Zeile 157:		Zeile 157:
	* galvanically isolate the input signal from the internal electronics		* galvanically isolate the input signal from the internal electronics
	*: an opto-isolator with the necessary bandwidth must be used PLUS the galvanically isolated power supply for the circuitry driving the input side of the opto-isolator		*: an opto-isolator with the necessary bandwidth must be used PLUS the galvanically isolated power supply for the circuitry driving the input side of the opto-isolator
	** video opto-isolator: [https://www.broadcom.com/products/optocouplers/industrial-plastic/specific-function/plastic-wideband-analog-video-optocoupler/hcnw4562 Broadcom HCNW4562] - 5pcs DIP8 ordered at digikey with {{digikeyOrder\|72796786}} at NOV-12, 2021		** video opto-isolator: [https://www.broadcom.com/products/optocouplers/industrial-plastic/specific-function/plastic-wideband-analog-video-optocoupler/hcnw4562 Broadcom HCNW4562] - [https://www.digikey.at/product-detail/de/broadcom-limited/HCNW4562-000E/516-3750-ND/1236139 5pcs HCNW4562-000E - DIP8] ordered at digikey with {{digikeyOrder\|72796786}} at NOV-12, 2021
	** power isolator: B1212S-1W - {{AliExpressItem\|4000891973346}}, ordered with {{AliExpressOrder\|8141715219203825}}		** power isolator: B1212S-1W - {{AliExpressItem\|4000891973346}}, ordered with {{AliExpressOrder\|8141715219203825}}
	* adapt the input signal (normal 1Vpp video signal level) the the internal level (2.6Vpp)		* adapt the input signal (normal 1Vpp video signal level) the the internal level (2.6Vpp)

Wolfgang: /* Possible CBVS modification */

2021-11-13T16:36:30Z

Possible CBVS modification

← Nächstältere Version		Version vom 13. November 2021, 16:36 Uhr
Zeile 148:		Zeile 148:
	A modification to feed CVBS into the KV-1352 must incorporate 4 features:		A modification to feed CVBS into the KV-1352 must incorporate 4 features:

	* find the place where CVBS ~~isinside~~ the KV-1352		* find the place where CVBS is inside the KV-1352
	*: this is the collector of transistor Q202 on the A-board:		*: this is the collector of transistor Q202 on the A-board (conveniently available on test point <code>TP12</code>):
	*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}		*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/KV-1352_schematic_Q202_videoStage.png}}
	* find a method to switch between internal video and external video		* find a method to switch between internal video and external video
	*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal		*: ideally, the KV-1352s video IF processor could be coaxed into providing no signal
			*: unfortunately, OPK102 and OPK-103 do not help here because they both do not need to switch between tuner and another video source
	*: if all else fails, a mechanical switch shall be used to cut the connection from Q202's collector to TP12/R307		*: if all else fails, a mechanical switch shall be used to cut the connection from Q202's collector to TP12/R307
	* galvanically isolate the input signal from the internal electronics		* galvanically isolate the input signal from the internal electronics
Zeile 159:		Zeile 160:
	** power isolator: B1212S-1W - {{AliExpressItem\|4000891973346}}, ordered with {{AliExpressOrder\|8141715219203825}}		** power isolator: B1212S-1W - {{AliExpressItem\|4000891973346}}, ordered with {{AliExpressOrder\|8141715219203825}}
	* adapt the input signal (normal 1Vpp video signal level) the the internal level (2.6Vpp)		* adapt the input signal (normal 1Vpp video signal level) the the internal level (2.6Vpp)
	*: this should be possible by biasing the output transistor of the opto-isolator equivalent to Q202, the hcnw4562's recommended application circuit should allow for tuning the level:		*: this should be possible by biasing the output transistor of the opto-isolator circuit equivalent to Q202, the hcnw4562's recommended application circuit should allow for tuning the level:
	*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/HPCL4562_app_circuit.png}}		*: {{Image\|/pub/hardware/Unterhaltungs-Elektronik-Geräte/SONY Trinitron KV-1352/HPCL4562_app_circuit.png}}