Under Dash Cassette Deck Wiring
#3062837
07/26/22 07:32 PM
07/26/22 07:32 PM
|
Joined: Mar 2005
Posts: 11,269
Slantytown
DUFFMAN
OP
Ask And Ye Shall Receive
|
OP
Ask And Ye Shall Receive
Joined: Mar 2005
Posts: 11,269
Slantytown
|
I picked up a really cool under dash cassette deck at Goodwill today. It's a Teac AC-9 from 1972.
I opened it up, replace the belt and it actually plays cassettes hooked up to a 12V desk top power supply via the red and black wires. The remaining wires are;
Yellow
Orange
Blue
White
It has a balance on it so it should be stereo. I would imagine the remaining 4 wires are positive and ground for 2 channels, however, I can't find a wiring diagram online that tells me what's what.
No longer taking $h!t from anyone!
|
|
|
Re: Under Dash Cassette Deck Wiring
[Re: Fat_Mike]
#3063939
07/30/22 07:02 PM
07/30/22 07:02 PM
|
Joined: Mar 2005
Posts: 11,269
Slantytown
DUFFMAN
OP
Ask And Ye Shall Receive
|
OP
Ask And Ye Shall Receive
Joined: Mar 2005
Posts: 11,269
Slantytown
|
Go to the "support section on the TEAC USA website and see if they're any help. I sent them a message and they said it was too old for them to support.
No longer taking $h!t from anyone!
|
|
|
Re: Under Dash Cassette Deck Wiring
[Re: DUFFMAN]
#3063944
07/30/22 07:43 PM
07/30/22 07:43 PM
|
Joined: Jan 2003
Posts: 5,445
So Cal
Sinitro
master
|
master
Joined: Jan 2003
Posts: 5,445
So Cal
|
Suggest U open the unit and double check where each wire goes... 1 wire is to 12V+ 1 wire is ground & speaker ground 1 wire is left speaker + 1 wire is right speaker + By following each wire internally will disclose its function, most crucial is the 12V+ and ground, the speaker +'s are easily reversed .. Just my $0.02... 
|
|
|
Re: Under Dash Cassette Deck Wiring
[Re: Sinitro]
#3063947
07/30/22 08:16 PM
07/30/22 08:16 PM
|
Joined: Jan 2003
Posts: 21,525
N.E. OHIO, USA
A12
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 21,525
N.E. OHIO, USA
|
Suggest U open the unit and double check where each wire goes... 1 wire is to 12V+ 1 wire is ground & speaker ground 1 wire is left speaker + 1 wire is right speaker + By following each wire internally will disclose its function, most crucial is the 12V+ and ground, the speaker +'s are easily reversed .. Just my $0.02... You never want to get the speaker wires "out of phase" or the + positive to the +positive on one speaker and the + positive to the - negative on the other speaker as you will have poor sound quality. When you do this one speaker will cancel out the other as one is "pushing" air and the other is "pulling" air (for lack of a better term). You will have little or less base. It's best to wire the speaker in phase or correct, positive to positive and negative to negative.
|
|
|
Re: Under Dash Cassette Deck Wiring
[Re: A12]
#3063998
07/31/22 12:33 AM
07/31/22 12:33 AM
|
Joined: Jan 2003
Posts: 21,525
N.E. OHIO, USA
A12
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 21,525
N.E. OHIO, USA
|
one for $17.49
https://www.ebay.com/itm/125308582463?hash=item1d2cf93a3f:g:mCwAAOSwY5Jie8il
search buy it now title:
TEAC AC-9 AC9 Service Manual **ORIGINAL**
Last edited by A12; 07/31/22 12:39 AM.
|
|
|
Re: Under Dash Cassette Deck Wiring
[Re: A12]
#3064010
07/31/22 03:23 AM
07/31/22 03:23 AM
|
Joined: Jan 2003
Posts: 5,445
So Cal
Sinitro
master
|
master
Joined: Jan 2003
Posts: 5,445
So Cal
|
Suggest U open the unit and double check where each wire goes... 1 wire is to 12V+ 1 wire is ground & speaker ground 1 wire is left speaker + 1 wire is right speaker + By following each wire internally will disclose its function, most crucial is the 12V+ and ground, the speaker +'s are easily reversed .. Just my $0.02... You never want to get the speaker wires "out of phase" or the + positive to the +positive on one speaker and the + positive to the - negative on the other speaker as you will have poor sound quality. When you do this one speaker will cancel out the other as one is "pushing" air and the other is "pulling" air (for lack of a better term). You will have little or less base. It's best to wire the speaker in phase or correct, positive to positive and negative to negative. True... Whenever the amplifiers has separate ground leads for each channel speaker outputs...However in a (4) wire system, the amplifier's negative speaker output leads are also chassis ground so its not possible to connect a speaker out of phase from the amplifier side only @ the speaker unit itself if its ground and positive leads are reversed..... Just my $0.02...
|
|
|
Re: Under Dash Cassette Deck Wiring
[Re: Sinitro]
#3064071
07/31/22 01:22 PM
07/31/22 01:22 PM
|
Joined: Jan 2003
Posts: 21,525
N.E. OHIO, USA
A12
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 21,525
N.E. OHIO, USA
|
Suggest U open the unit and double check where each wire goes... 1 wire is to 12V+ 1 wire is ground & speaker ground 1 wire is left speaker + 1 wire is right speaker + By following each wire internally will disclose its function, most crucial is the 12V+ and ground, the speaker +'s are easily reversed .. Just my $0.02... You never want to get the speaker wires "out of phase" or the + positive to the +positive on one speaker and the + positive to the - negative on the other speaker as you will have poor sound quality. When you do this one speaker will cancel out the other as one is "pushing" air and the other is "pulling" air (for lack of a better term). You will have little or less base. It's best to wire the speaker in phase or correct, positive to positive and negative to negative. True... Whenever the amplifiers has separate ground leads for each channel speaker outputs...However in a (4) wire system, the amplifier's negative speaker output leads are also chassis ground so its not possible to connect a speaker out of phase from the amplifier side only @ the speaker unit itself if its ground and positive leads are reversed..... Just my $0.02... Understand all of that  but DUFFMAN is trying to identify if those four (orange, white, blue, yellow) wires are positive and negative speaker wires. If they are? then there's a chance DUFFMAN could get one speaker out of phase. Getting both out of phase would not be a really big issue but one speaker out of phase is. With what you say that the - negatives are grounded to the deck's chassis, then it should be easy for DUFFMAN to determine the - negative (ground/earth) wires with an Ohm/multimeter by putting each wire to the deck's chassis.........is that correct??? Mike
|
|
|
Re: Under Dash Cassette Deck Wiring
[Re: A12]
#3064148
07/31/22 06:53 PM
07/31/22 06:53 PM
|
Joined: Jan 2003
Posts: 5,445
So Cal
Sinitro
master
|
master
Joined: Jan 2003
Posts: 5,445
So Cal
|
Understand all of that but DUFFMAN is trying to identify if those four (orange, white, blue, yellow) wires are positive and negative speaker wires. If they are? then there's a chance DUFFMAN could get one speaker out of phase. Getting both out of phase would not be a really big issue but one speaker out of phase is. With what you say that the - negatives are grounded to the deck's chassis, then it should be easy for DUFFMAN to determine the - negative (ground/earth) wires with an Ohm/multimeter by putting each wire to the deck's chassis.........is that correct??? Mike As I posted previously with only (4) output leads the connections are as listed below, and are easily identified with an ohm meter and taking off the bottom chassis cover.. 1 wire is to 12V+ 1 wire is ground & speaker ground 1 wire is left speaker + 1 wire is right speaker + Since to get stereo audio output the speaker ground (12V-/speaker ground) has to be connected. Note the ground connection is common for the L/R speakers so the only other hookup options are L+ and R+ so the speakers will be in-phase. Later tape & head units and amplifiers that had a higher output power used what's called a BTL output scheme and here the L & R speaker negative connections are not grounded, so it is more possible to wire a speaker out-of-phase. Higher powered tape/head units are rated @ like 15Wx2 or 15Wx4, while the AC9 has a standard lower-powered amplifier rated @ like 5Wx2. Also note that if the tape/head unit having a 15Wx2 or 15Wx4 amplifier output capability, by grounding any of the speaker output leads the unit should shut down. Or in extreme cases output stage damage may occur, but later circuit designs typically have more sophisticated built-in protection. There are many subjects I know little about... But car audio/component system design we do know something...  Having designed/built various show vehicles for SEMA and CES clients, plus doing product development/sourcing for many of the major audio and OE auto brands... Just my $0.02...
|
|
|
Re: Under Dash Cassette Deck Wiring
[Re: Sinitro]
#3064153
07/31/22 07:09 PM
07/31/22 07:09 PM
|
Joined: Jan 2003
Posts: 21,525
N.E. OHIO, USA
A12
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 21,525
N.E. OHIO, USA
|
Understand all of that but DUFFMAN is trying to identify if those four (orange, white, blue, yellow) wires are positive and negative speaker wires. If they are? then there's a chance DUFFMAN could get one speaker out of phase. Getting both out of phase would not be a really big issue but one speaker out of phase is. With what you say that the - negatives are grounded to the deck's chassis, then it should be easy for DUFFMAN to determine the - negative (ground/earth) wires with an Ohm/multimeter by putting each wire to the deck's chassis.........is that correct??? Mike As I posted previously with only (4) output leads the connections are as listed below, and are easily identified with an ohm meter and taking off the bottom chassis cover.. 1 wire is to 12V+ 1 wire is ground & speaker ground 1 wire is left speaker + 1 wire is right speaker + Since to get stereo audio output the speaker ground (12V-/speaker ground) has to be connected. Note the ground connection is common for the L/R speakers so the only other hookup options are L+ and R+ so the speakers will be in-phase. Later tape & head units and amplifiers that had a higher output power used what's called a BTL output scheme and here the L & R speaker negative connections are not grounded, so it is more possible to wire a speaker out-of-phase. Higher powered tape/head units are rated @ like 15Wx2 or 15Wx4, while the AC9 has a standard lower-powered amplifier rated @ like 5Wx2. Also note that if the tape/head unit having a 15Wx2 or 15Wx4 amplifier output capability, by grounding any of the speaker output leads the unit should shut down. Or in extreme cases output stage damage may occur, but later circuit designs typically have more sophisticated built-in protection. There are many subjects I know little about... But car audio/component system design we do know something... Having designed/built various show vehicles for SEMA and CES clients, plus doing product development/sourcing for many of the major audio and OE auto brands... Just my $0.02... Thanks Sinitro. DUFFMAN said there are six (6) wires and that he was able to hook up the red (+) and the black (-) and then he was left with four (4) wires the yellow, blue, white and orange which he thinks are speaker wires. So can he determine which of those four remaining wires are the ground/negative (-) with a multimeter by way of the deck chassis? DUFFMAN wrote: I opened it up, replace the belt and it actually plays cassettes hooked up to a 12V desk top power supply via the red and black wires.
The remaining wires are;
Yellow
Orange
Blue
White
It has a balance on it so it should be stereo. I would imagine the remaining 4 wires are positive and ground for 2 channels, however, I can't find a wiring diagram online that tells me what's what.
|
|
|
Re: Under Dash Cassette Deck Wiring
[Re: A12]
#3064156
07/31/22 07:29 PM
07/31/22 07:29 PM
|
Joined: Jan 2003
Posts: 1,894
Harriman NY
71GTX471
top fuel
|
top fuel
Joined: Jan 2003
Posts: 1,894
Harriman NY
|
I don't think it's worthwhile it's only a cassette player, would rather have a Pioneer under dash super tuner with a better FM tuner/amp & cassette.
Last edited by 71GTX471; 07/31/22 07:30 PM.
|
|
|
Re: Under Dash Cassette Deck Wiring
[Re: A12]
#3064187
07/31/22 09:43 PM
07/31/22 09:43 PM
|
Joined: Jan 2003
Posts: 5,445
So Cal
Sinitro
master
|
master
Joined: Jan 2003
Posts: 5,445
So Cal
|
Thanks Sinitro. DUFFMAN said there are six (6) wires and that he was able to hook up the red (+) and the black (-) and then he was left with four (4) wires the yellow, blue, white and orange which he thinks are speaker wires. So can he determine which of those four remaining wires are the ground/negative (-) with a multimeter by way of the deck chassis?
Very sorry I missed the point about the red and black power/ground leads, making a total of (6)....  Since the AC9 amplifier was rated @ 6Wx2 means that it uses standard amplifier circuits not the BTL higher powered type. To answer the question now with the remaining (4) wires should be Right Speaker +/- and Left Speaker +/-, by using a multi-meter check for continuity between chassis and each wire, the "-" should be ground so (2) wires should read continuity to each as well as to chassis ground. Leaving (2) wires which should be Left Speaker + and Right Speaker +, confirming each is easily done by powering up the unit, play a cassette, keep the volume level low and confirm the respective +/- speaker outputs by adjusting balance left to right... Just my $0.02...
|
|
|
|
|
