Hi,
So it seems that all of those connections are OK. Please check the
IC23 connections next. P23 from IC22 to IC23-12,13,8, and the other
connections on IC23 which you can see on the schematic. I am assuming
that you do not have an oscilloscope, right?
You say you have 13.56 volts at IC10-1 That's interesting, as
IC18 outputs should range from -5 to +5 only. Does IC10 have -15
on pin 4? Does IC18 have +5 on pin 16 and -5 on pin 7?
Bob
________________________________
From: "Phil65 phil0065@yahoo.fr [PolySix]" <PolySix@yahoogroups.com>
To: PolySix@yahoogroups.com
Sent: Thursday, May 29, 2014 4:47 AM
Subject: Re: [PolySix] EG and VCF not working after battery leakage
Looking at the klm367 schematic, I understand now your point with the connections between pins and signal P20, P21 and P22 but I had some diffuculty to cross link that information with the PCB drawing... until I realize that i was counting incorrectly the pins while I did know that it was from top right then CCW
Do what I say, not what I do... I was correct for top side numbers but reverse for the bottom side i.e i did restart with 9 below 1... Stupid!
So now I do have the following:
P22 IC18-9 IC19-9 and IC22-23 => OK
P21 IC18-10 IC19-10 and IC22-22 => OK
P20 IC18-11 IC19-11 and IC22-21 => OK
INH IC19-6 and IC23-10 => OK
"X" IC18-3 and IC19-3 and IC27-1 =>OK
I did recheck my previous post to correct them in light of my wrong pin counting
1) I did the DAC calib again and turning VR6 CCW => from led 8 to led 7 6 then 5, while turning VR7 CCW from led 8 to 7 then 6
OK
2) pin 3 of IC18 and pin 1 of IC27, OK
OK
3) pin 6 of IC18 and IC23-4. OK
OK
4) pins 9,10 and 11 of IC18 and 19 should be connected to each other and to IC22 ?
UPDATED: Wrong comment see above!
5) With power on, you should be able to vary a front panel
control,such as filter cutoff, and see IC7 pin 7 change voltage as you
do it (in manual mode).
3.177V => 3.120V cut off from 10 to 0 with all controls at normal setting
UPDATED: Luckily correct, I did measure in fact pin 6 but it is strapped to pin 7...
6) when you select different patches, you should see the attack at IC10-1decay
=> On IC 10-1 no change always 13.56V
UPDATED: Correct measurement
7) Decay at IC10-7 ?
=>slight variation between patches. In manual mode and normal setting with decay control from 0 to 10 => 3.240V to 3.346V
UPDATED: Again Luckily correct, I did measure in fact pin 6 but it is strapped to pin 7...
I apologize for my mistake and thanks again for your patience and your support.
Phil
--------------------------------------------
En date de : Jeu 29.5.14, Bob Grieb bobgrieb@yahoo.com [PolySix] <PolySix@yahoogroups.com> a écrit :
Objet: Re: [PolySix] EG and VCF not working after battery leakage
À: "PolySix@yahoogroups.com" <PolySix@yahoogroups.com>
Date: Jeudi 29 mai 2014, 3h28
These should be
connected:
IC18-9 IC19-9 and IC22-23 this
is signal "P22"
IC18-10 IC19-10 and IC22-22
this is signal
"P21"
IC18-11 IC19-11 and IC22-21
this is signal "P20"
IC19-6 and
IC23-10
Also, IC18-3 must connect to
IC19-3 as well as to IC27-1 which you checked already.
You may want to download the
service manual as it is available forfree on the web, and see the
schematic for KLM-367.
If IC18 and IC19 are not
connected properly, the control voltages
won't work
correctly.
Please ignore IC22 pins 5, 19,and
35. They are not related to
this discussion. We are
checking A B C and INH signals to IC18 and
IC19.
Bob
From: "Phil65
phil0065@yahoo.fr [PolySix]"
<PolySix@yahoogroups.com>
To:
PolySix@yahoogroups.com
Sent: Wednesday, May
28, 2014 7:55 PM
Subject: Re: [PolySix]
EG and VCF not working after battery leakage
Hi Bob,
You are really helpfull. Merci !
1) I did the DAC calib again and turning VR6 CCW => from
led 8 to led 7 6 then 5, while turning VR7 CCW from led 8
to 7 then 6
2) pin 3 of IC18 and pin 1 of IC27, OK
3) pin 6 of IC18 and IC23-4. OK
4) pins 9,10 and 11 of IC18 and 19 should be connected to
each other and to IC22 ?
It seems I have a problem here. I found only IC18-9 +
IC19-9 + IC22 -5 , IC22-19 and IC22-35 connected together.
Nothing between IC18-10 (IC18-11) with any pin of IC19 or
IC22 ??
Shall I strap IC18-9 + 10 + 11
5) With power on, you should be able to vary a front
panel
control,such as filter cutoff, and see IC7 pin 7 change
voltage as you
do it (in manual mode).
3.177V => 3.120V cut off from 10 to 0 with all controls
at normal setting
6) when you select different patches, you should see the
attack at IC10-1decay
=> On IC 10-1 no change always 13.56V
7) Decay at IC10-7 ?
=>slight variation between patches. In manual mode and
normal setting with decay control from 0 to 10 => 3.240V
to 3.346V
Thanks for your help, really appreciated !
Phil
--------------------------------------------
En date de : Jeu 29.5.14, Bob Grieb bobgrieb@yahoo.com
[PolySix] <PolySix@yahoogroups.com> a écrit :
Objet: Re: [PolySix] EG and VCF not working after battery
leakage
À: "PolySix@yahoogroups.com"
<PolySix@yahoogroups.com>
Date: Jeudi 29 mai 2014, 0h21
Hi Phil,
If you are seeing LEDs 1 and 8 in DAC calibration mode,
that
impliesthat
the DAC and the input muxes are working. Another
thing
to try -
in
the DAC calibration test mode, turn the two controls
that
you were supposedto
set for this test, and you should see the LED's
change.
Don't worry about the click noise test for
now.
The voltage demux for controlling the EG and the VCF is
mostlyIC18
(4051). I would check with the ohmmeter that you
have
good connections(with
the power off, of course) between pin 3 of IC18 and pin 1
of
IC27, and between
pin
6 of IC18 and IC23-4. Also, pins 9,10 and 11 of IC18
and
19 should be connectedto
each other and to IC22.
With power on, you should be able to vary a front panel
control,such
as filter cutoff, and see IC7 pin 7 change voltage as
you
do it (in manual
mode).
And when you select different patches, you should see
the
attack at IC10-1decay
at IC10-7, etc changing with different patches. Be
careful
when probing with
the
power on not to short anything or you can damage chips in
an
instant. Use the gndtest
pt for the meter black or negative lead.
Tell us what you measure at these points in the circuit
and
if they vary with the
corresponding
front panel control in manual mode, or when you change
patches.
Bob
From:
"Phil65 phil0065@yahoo.fr [PolySix]"
<PolySix@yahoogroups.com>
To:
PolySix@yahoogroups.com
Sent: Wednesday, May
28, 2014 6:05 PM
Subject: Re: [PolySix]
EG and VCF not working after battery leakage
Thanks Bob for your quick answer !
Seems that my patch looses "EG" from memory. I
have no sound unless I put the VCA switch from EG back
to
"square" again to get some sound.
Not sure to keep the bank memory even when polysix is
still
on.
I did the procedure and it passes directly. Here a quick
summary:
*dummy 56 ohm => all leds on
*remove resistance => A1 leds
*SW1 in test mode and tape switch to enable => Only
leds
1+8 on
* SW1 back to normal => still leds 1+8
* "7 ) confirm that output DC click noise is within
6V
p-p when power is switched off" => sorry I
don't
understand precisely what to do/ measure?
* Power on again => A1 leds on.
Thanks for your support
Phil
--------------------------------------------
En date de : Mer 28.5.14, Bob Grieb bobgrieb@yahoo.com
[PolySix] <PolySix@yahoogroups.com> a écrit :
Objet: Re: [PolySix] EG and VCF not working after
battery
leakage
À: "PolySix@yahoogroups.com"
<PolySix@yahoogroups.com>
Date: Mercredi 28 mai 2014, 2h09
See if
these functions can be controlled correctly when using
patchesin
memory. If so, then the output from the CPU to the
analog
circuitsis
OK. Then you have a problem with reading the
controls.But
if the sound is always the same with all programs, then
the
output
circuit is bad and maybe t is reading from the pots
OK.Did
you try the DAC calibration test in the manual? It
would
be helpfulto
know if that is working OK. Just the part where you
try
to
get the
two
LEDs to light up.
Bob
From:
"phil0065@yahoo.fr [PolySix]"
<PolySix@yahoogroups.com>
To:
PolySix@yahoogroups.com
Sent: Tuesday, May 27,
2014 6:02 PM
Subject: [PolySix] EG
and VCF not
working after battery leakage
Bonjour !I am
French
and happy to join this group of Polysix owner. My old
Polysix bought back in
1983 has been sleeping in the attic since 1990, until I
have
returned back now to
my first love. Unfortunately I have discovered the
battery
leakage problem !
So I did
the standard procedure (like many)Spend a
lot of time checking the lines on KLM-367 with plenty
of
leds on at start
up.. Browse internet for hours (discover service
manual, old crown, etc)…, change IC
30 & 31 … recheck continuity, still few leds
on..Recheck again, change all set of
panel switches (vintage planet)..4 leds on... Bank B
not
working...Check
lines again, to get finally only leds A1
on start up. Great !
Unfortunately sound
is not OK.
Tune seems
OK,
6 voices are OK, voltages from power board are OK (15V,
5V
-5V and -15V) all pots
and switches seem to work except the 4x EG and 4x VCF
pots
which are not
active! I think at
this stage it is useless to do the calibration
procedure.
Is
there some indications,
checking to start with to define if it is still a
line/continuity problem or if electronic parts (IC,
diode..)
should be changed.
Thanks in
advance for your help
Phil
#yiv8680019145 #yiv8680019145 --Message
Re: [PolySix] EG and VCF not working after battery leakage
2014-05-29 by Bob Grieb