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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Bentley 100C B&W portable TV.
But I had a customer drag in a Bentley 100C the other day.
"This looks familiar." So a bit of rooting around in a closet and I found it's brother. Customer TV makes noise, and a barely visible white horizontal line. Mine is totally dead. So a bit of poking about I found this: http://mycom.kr/988 Cute little set. And about as useless as tits on a nun now. Anybody every find a manual / schematic for this thing? Jeff -- “Egotism is the anesthetic that dulls the pain of stupidity.” Frank Leahy, Head coach, Notre Dame 1941-1954 http://www.stay-connect.com |
#2
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Bentley 100C B&W portable TV.
On 16 jun, 23:41, Jeffrey D Angus wrote:
But I had a customer drag in a Bentley 100C the other day. "This looks familiar." So a bit of rooting around in a closet and I found it's brother. Customer TV makes noise, and a barely visible white horizontal line. frame collapse. trace the wires back from the yoke to the pcb, look for an i.c with at least 6 or 8 pins, probably heatsinked, or a pair of transistors. start there. check there is a supply voltage, usually between 20 and 60v, probably from a secondary of the big black line output transformer. could be an open resistor in this feed. Mine is totally dead. well, have you checked for missing voltages inside? bad solder joints? protection diode near 12v inlet? -B |
#3
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Bentley 100C B&W portable TV.
b wrote:
On 16 jun, 23:41, Jeffrey D Angus wrote: But I had a customer drag in a Bentley 100C the other day. "This looks familiar." So a bit of rooting around in a closet and I found it's brother. Customer TV makes noise, and a barely visible white horizontal line. frame collapse. trace the wires back from the yoke to the pcb, look for an i.c with at least 6 or 8 pins, probably heatsinked, or a pair of transistors. start there. check there is a supply voltage, usually between 20 and 60v, probably from a secondary of the big black line output transformer. could be an open resistor in this feed. Mine is totally dead. well, have you checked for missing voltages inside? bad solder joints? protection diode near 12v inlet? -B thankies, I'll post the resutls in a day or so. -- “Egotism is the anesthetic that dulls the pain of stupidity.” Frank Leahy, Head coach, Notre Dame 1941-1954 http://www.stay-connect.com |
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