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Pioneer Model RX-1190 Stereo Cassette Deck Receiver - NO VOLUME
Working on a Pioneer Model RX-1190 Stereo Cassette Deck Receiver with
no volume and a flashing volume display leds. I think that the flashing leds are indicators of problems. Signal traced the audio from the receiver portion (FM). I do have a signal output from the audio multiplexer IC302 (TC9164N). That signal continues to IC303 which I cannot determine exactly what it is. It is a Sony CXD1120P (16 pin DIP). The signal stops there and does not continue to IC304, a hi performance OP Amp (M5218P). When I disconnect the input signal from the Sony IC (IC303) and connect directly to the input pins of the OP Amp (IC304), I have audio with no volume control. I suspect that the Sony IC is a volume or signal level control IC. Here is the pinouts and voltage measurements that I could determine from back tracing. IC303 (CXD1120P) Pin 1 - Input Right.................0.00v Standby..........0.00v Run Pin 2 - Ground Pin 3 - Output Right................-0.35v Standby.........0.00V Run Pin 4,5,6,7 Connected together Pin 8 - -Vcc (-12v).................-0.19v Standby.......-12.55v Run Pin 9 - Clock........................2.060v Standby........1.559v Run Pin 10 - Data........................2.054v Standby........1.552v Run Pin 11 - Vol St (VRST)...............0.001v Standby........0.008v Run Pin 12 - ?...........................0.030v Standby........2.719v Run Pin 13 - +Vcc (12v)..................0.134v Standby.......11.84 v Run Pin 14 - Output Left................-0.053v Standby........0.454v Run Pin 15 - Ground Pin 16 - Input Left..................0.030v Standby........0.008v Run Some notes apply: -When I disconnected Pins 9,10,11 (Clock,Data,Volume), the front volume led display still flashes. May I have a problem with the controller IC on the front panel (IC103 PDG005-C)? -Pins 9 and 10 have the recognizable clock and data pulses. However they seem to pulsate in time with the led flashing. -Pin 11 does receive pulses when the volume is being adjusted. -Power supply inputs measured ok. (-10v line measures -9.96v,5.6v line measured 5.36v). 12volt line measures 11.86 v. 5 volt line measures 4.79 v. -Muting line measures 4.65 volts at run. My dilemma is twofold. Do I have a defective controller in protect mode or do I have a so-called defective volume (signal level) IC? When the volume ic is disconnected, the flashing display still persists.Any help would be appreciated. Thanks ahead, Ron -- Posted via Mailgate.ORG Server - http://www.Mailgate.ORG |
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Pioneer Model RX-1190 Stereo Cassette Deck Receiver - NO VOLUME
The sony CXD1120P is the electronic volume IC, available he
http://parts.pioneerelectronics.com/...m=CXD1120P%2D1 Flashing volume bars usually indicate the Mute function is engaged... But if the unit will not unmute with the remote I'd suspect the E-vol IC is bad or receiving incorrect data, if the mute command is not working properly you could have a faulty microprocessor, PDG005C. I have seen a few bad in Pioneer product, but it's not real common. -- Jammy Harbin J & J Electronics, Inc. 227 S. 4th St. Selmer, TN 38375 731-645-3311 "Ron Novini" wrote in message news:2f0a15d6faef17e7744fdf27f22be3bc.123933@mygat e.mailgate.org... Working on a Pioneer Model RX-1190 Stereo Cassette Deck Receiver with no volume and a flashing volume display leds. I think that the flashing leds are indicators of problems. Signal traced the audio from the receiver portion (FM). I do have a signal output from the audio multiplexer IC302 (TC9164N). That signal continues to IC303 which I cannot determine exactly what it is. It is a Sony CXD1120P (16 pin DIP). The signal stops there and does not continue to IC304, a hi performance OP Amp (M5218P). When I disconnect the input signal from the Sony IC (IC303) and connect directly to the input pins of the OP Amp (IC304), I have audio with no volume control. I suspect that the Sony IC is a volume or signal level control IC. Here is the pinouts and voltage measurements that I could determine from back tracing. IC303 (CXD1120P) Pin 1 - Input Right.................0.00v Standby..........0.00v Run Pin 2 - Ground Pin 3 - Output Right................-0.35v Standby.........0.00V Run Pin 4,5,6,7 Connected together Pin 8 - -Vcc (-12v).................-0.19v Standby.......-12.55v Run Pin 9 - Clock........................2.060v Standby........1.559v Run Pin 10 - Data........................2.054v Standby........1.552v Run Pin 11 - Vol St (VRST)...............0.001v Standby........0.008v Run Pin 12 - ?...........................0.030v Standby........2.719v Run Pin 13 - +Vcc (12v)..................0.134v Standby.......11.84 v Run Pin 14 - Output Left................-0.053v Standby........0.454v Run Pin 15 - Ground Pin 16 - Input Left..................0.030v Standby........0.008v Run Some notes apply: -When I disconnected Pins 9,10,11 (Clock,Data,Volume), the front volume led display still flashes. May I have a problem with the controller IC on the front panel (IC103 PDG005-C)? -Pins 9 and 10 have the recognizable clock and data pulses. However they seem to pulsate in time with the led flashing. -Pin 11 does receive pulses when the volume is being adjusted. -Power supply inputs measured ok. (-10v line measures -9.96v,5.6v line measured 5.36v). 12volt line measures 11.86 v. 5 volt line measures 4.79 v. -Muting line measures 4.65 volts at run. My dilemma is twofold. Do I have a defective controller in protect mode or do I have a so-called defective volume (signal level) IC? When the volume ic is disconnected, the flashing display still persists.Any help would be appreciated. Thanks ahead, Ron -- Posted via Mailgate.ORG Server - http://www.Mailgate.ORG |
#3
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Pioneer Model RX-1190 Stereo Cassette Deck Receiver - NO VOLUME
If it's in protect mode, your problem likely goes back to a defective amp
stage, or maybe a power supply problem. The fact that it's muted early on may just be another feature of the protect circuit. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Ron Novini" wrote in message news:2f0a15d6faef17e7744fdf27f22be3bc.123933@mygat e.mailgate.org... Working on a Pioneer Model RX-1190 Stereo Cassette Deck Receiver with no volume and a flashing volume display leds. I think that the flashing leds are indicators of problems. Signal traced the audio from the receiver portion (FM). I do have a signal output from the audio multiplexer IC302 (TC9164N). That signal continues to IC303 which I cannot determine exactly what it is. It is a Sony CXD1120P (16 pin DIP). The signal stops there and does not continue to IC304, a hi performance OP Amp (M5218P). When I disconnect the input signal from the Sony IC (IC303) and connect directly to the input pins of the OP Amp (IC304), I have audio with no volume control. I suspect that the Sony IC is a volume or signal level control IC. Here is the pinouts and voltage measurements that I could determine from back tracing. IC303 (CXD1120P) Pin 1 - Input Right.................0.00v Standby..........0.00v Run Pin 2 - Ground Pin 3 - Output Right................-0.35v Standby.........0.00V Run Pin 4,5,6,7 Connected together Pin 8 - -Vcc (-12v).................-0.19v Standby.......-12.55v Run Pin 9 - Clock........................2.060v Standby........1.559v Run Pin 10 - Data........................2.054v Standby........1.552v Run Pin 11 - Vol St (VRST)...............0.001v Standby........0.008v Run Pin 12 - ?...........................0.030v Standby........2.719v Run Pin 13 - +Vcc (12v)..................0.134v Standby.......11.84 v Run Pin 14 - Output Left................-0.053v Standby........0.454v Run Pin 15 - Ground Pin 16 - Input Left..................0.030v Standby........0.008v Run Some notes apply: -When I disconnected Pins 9,10,11 (Clock,Data,Volume), the front volume led display still flashes. May I have a problem with the controller IC on the front panel (IC103 PDG005-C)? -Pins 9 and 10 have the recognizable clock and data pulses. However they seem to pulsate in time with the led flashing. -Pin 11 does receive pulses when the volume is being adjusted. -Power supply inputs measured ok. (-10v line measures -9.96v,5.6v line measured 5.36v). 12volt line measures 11.86 v. 5 volt line measures 4.79 v. -Muting line measures 4.65 volts at run. My dilemma is twofold. Do I have a defective controller in protect mode or do I have a so-called defective volume (signal level) IC? When the volume ic is disconnected, the flashing display still persists.Any help would be appreciated. Thanks ahead, Ron -- Posted via Mailgate.ORG Server - http://www.Mailgate.ORG |
#4
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Pioneer Model RX-1190 Stereo Cassette Deck Receiver - NO VOLUME
Not likely, he says when he bypasses the E-vol IC he has audio. Thus the
output stages are working properly. -- Jammy Harbin J & J Electronics, Inc. 227 S. 4th St. Selmer, TN 38375 731-645-3311 "Mark D. Zacharias" wrote in message ... If it's in protect mode, your problem likely goes back to a defective amp stage, or maybe a power supply problem. The fact that it's muted early on may just be another feature of the protect circuit. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Ron Novini" wrote in message news:2f0a15d6faef17e7744fdf27f22be3bc.123933@mygat e.mailgate.org... Working on a Pioneer Model RX-1190 Stereo Cassette Deck Receiver with no volume and a flashing volume display leds. I think that the flashing leds are indicators of problems. Signal traced the audio from the receiver portion (FM). I do have a signal output from the audio multiplexer IC302 (TC9164N). That signal continues to IC303 which I cannot determine exactly what it is. It is a Sony CXD1120P (16 pin DIP). The signal stops there and does not continue to IC304, a hi performance OP Amp (M5218P). When I disconnect the input signal from the Sony IC (IC303) and connect directly to the input pins of the OP Amp (IC304), I have audio with no volume control. I suspect that the Sony IC is a volume or signal level control IC. Here is the pinouts and voltage measurements that I could determine from back tracing. IC303 (CXD1120P) Pin 1 - Input Right.................0.00v Standby..........0.00v Run Pin 2 - Ground Pin 3 - Output Right................-0.35v Standby.........0.00V Run Pin 4,5,6,7 Connected together Pin 8 - -Vcc (-12v).................-0.19v Standby.......-12.55v Run Pin 9 - Clock........................2.060v Standby........1.559v Run Pin 10 - Data........................2.054v Standby........1.552v Run Pin 11 - Vol St (VRST)...............0.001v Standby........0.008v Run Pin 12 - ?...........................0.030v Standby........2.719v Run Pin 13 - +Vcc (12v)..................0.134v Standby.......11.84 v Run Pin 14 - Output Left................-0.053v Standby........0.454v Run Pin 15 - Ground Pin 16 - Input Left..................0.030v Standby........0.008v Run Some notes apply: -When I disconnected Pins 9,10,11 (Clock,Data,Volume), the front volume led display still flashes. May I have a problem with the controller IC on the front panel (IC103 PDG005-C)? -Pins 9 and 10 have the recognizable clock and data pulses. However they seem to pulsate in time with the led flashing. -Pin 11 does receive pulses when the volume is being adjusted. -Power supply inputs measured ok. (-10v line measures -9.96v,5.6v line measured 5.36v). 12volt line measures 11.86 v. 5 volt line measures 4.79 v. -Muting line measures 4.65 volts at run. My dilemma is twofold. Do I have a defective controller in protect mode or do I have a so-called defective volume (signal level) IC? When the volume ic is disconnected, the flashing display still persists.Any help would be appreciated. Thanks ahead, Ron -- Posted via Mailgate.ORG Server - http://www.Mailgate.ORG |
#5
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Pioneer Model RX-1190 Stereo Cassette Deck Receiver - NO VOLUME
I guess I missed that. The blinking LED at the volume control was what I was
concerned about. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Ampdoc" wrote in message t... Not likely, he says when he bypasses the E-vol IC he has audio. Thus the output stages are working properly. -- Jammy Harbin J & J Electronics, Inc. 227 S. 4th St. Selmer, TN 38375 731-645-3311 "Mark D. Zacharias" wrote in message ... If it's in protect mode, your problem likely goes back to a defective amp stage, or maybe a power supply problem. The fact that it's muted early on may just be another feature of the protect circuit. Mark Z. -- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Ron Novini" wrote in message news:2f0a15d6faef17e7744fdf27f22be3bc.123933@mygat e.mailgate.org... Working on a Pioneer Model RX-1190 Stereo Cassette Deck Receiver with no volume and a flashing volume display leds. I think that the flashing leds are indicators of problems. Signal traced the audio from the receiver portion (FM). I do have a signal output from the audio multiplexer IC302 (TC9164N). That signal continues to IC303 which I cannot determine exactly what it is. It is a Sony CXD1120P (16 pin DIP). The signal stops there and does not continue to IC304, a hi performance OP Amp (M5218P). When I disconnect the input signal from the Sony IC (IC303) and connect directly to the input pins of the OP Amp (IC304), I have audio with no volume control. I suspect that the Sony IC is a volume or signal level control IC. Here is the pinouts and voltage measurements that I could determine from back tracing. IC303 (CXD1120P) Pin 1 - Input Right.................0.00v Standby..........0.00v Run Pin 2 - Ground Pin 3 - Output Right................-0.35v Standby.........0.00V Run Pin 4,5,6,7 Connected together Pin 8 - -Vcc (-12v).................-0.19v Standby.......-12.55v Run Pin 9 - Clock........................2.060v Standby........1.559v Run Pin 10 - Data........................2.054v Standby........1.552v Run Pin 11 - Vol St (VRST)...............0.001v Standby........0.008v Run Pin 12 - ?...........................0.030v Standby........2.719v Run Pin 13 - +Vcc (12v)..................0.134v Standby.......11.84 v Run Pin 14 - Output Left................-0.053v Standby........0.454v Run Pin 15 - Ground Pin 16 - Input Left..................0.030v Standby........0.008v Run Some notes apply: -When I disconnected Pins 9,10,11 (Clock,Data,Volume), the front volume led display still flashes. May I have a problem with the controller IC on the front panel (IC103 PDG005-C)? -Pins 9 and 10 have the recognizable clock and data pulses. However they seem to pulsate in time with the led flashing. -Pin 11 does receive pulses when the volume is being adjusted. -Power supply inputs measured ok. (-10v line measures -9.96v,5.6v line measured 5.36v). 12volt line measures 11.86 v. 5 volt line measures 4.79 v. -Muting line measures 4.65 volts at run. My dilemma is twofold. Do I have a defective controller in protect mode or do I have a so-called defective volume (signal level) IC? When the volume ic is disconnected, the flashing display still persists.Any help would be appreciated. Thanks ahead, Ron -- Posted via Mailgate.ORG Server - http://www.Mailgate.ORG |
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