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.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Ron Novini
 
Posts: n/a
Default 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
  #2   Report Post  
Ampdoc
 
Posts: n/a
Default 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   Report Post  
Mark D. Zacharias
 
Posts: n/a
Default 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   Report Post  
Ampdoc
 
Posts: n/a
Default 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   Report Post  
Mark D. Zacharias
 
Posts: n/a
Default 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







Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pioneer CT-W450R Tape Deck Problem Kevin Electronics Repair 3 March 6th 04 04:57 PM
Pioneer cassette deck mec schematic wanted Gaspar Electronics Repair 0 January 11th 04 03:13 PM
Crazy volume control in Pioneer VSX-D309 receiver Rubem Pechansky Electronics Repair 2 November 14th 03 08:56 PM
Kenwood Stereo Receiver KR-5040 problem. Russ Meredith Electronics Repair 1 August 5th 03 05:55 PM


All times are GMT +1. The time now is 01:08 PM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"