yes that is the same sheet I am using for pin orientation on them .
Q236
C 19.0
B 18.42
E 17.53
Note:U210 was removed to find circuit board designation for the op-amp between the caps and has not been reinstalled for these Q237 & Q236 voltage readings
Q236
C 19.0
B 18.42
E 17.53
Note:U210 was removed to find circuit board designation for the op-amp between the caps and has not been reinstalled for these Q237 & Q236 voltage readings
Which is correct on the emitter of Q236, negative 17 or positive 17 (from previous voltages posted)?
Confirm the voltages on Q236.
Confirm the voltages on Q236.
Q236
C Positive 19.0
B Negative 18.42
E Negative 17.53
Shoot me now and put me out of my misery getting bad when you can't read the meter negative or positive.
C Positive 19.0
B Negative 18.42
E Negative 17.53
Shoot me now and put me out of my misery getting bad when you can't read the meter negative or positive.
Is the LM311 in the circuit?
Are the two current shunt resistors in the circuit?
If yes to both, post the DC voltage on the LM311. Place the black probe on pin 4 of the LM311.
Are the two current shunt resistors in the circuit?
If yes to both, post the DC voltage on the LM311. Place the black probe on pin 4 of the LM311.
Is the LM311 in the circuit? yes
Are the two current shunt resistors in the circuit? yes
If yes to both, post the DC voltage on the LM311. Place the black probe on pin 4 of the LM311
On Pin 8 or 7 of LM311?
Are the two current shunt resistors in the circuit? yes
If yes to both, post the DC voltage on the LM311. Place the black probe on pin 4 of the LM311
On Pin 8 or 7 of LM311?
Post the voltage on all pins (leaving 4 out because the black probe will be there).
IC#
Pin 1:
Pin 2:
Pin 3:
Pin 4: Black probe
Pin 5:
Pin 6:
Pin 7:
Pin 8:
IC#
Pin 1:
Pin 2:
Pin 3:
Pin 4: Black probe
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Post the voltage on all pins (leaving 4 out because the black probe will be there).
IC#
Pin 1: 0
Pin 2: 0
Pin 3: 0.04
Pin 4: Black probe
Pin 5: 0
Pin 6: 0
Pin 7: 0
Pin 8: 0
I checked 4 times but there is no voltages on any of the pins
IC#
Pin 1: 0
Pin 2: 0
Pin 3: 0.04
Pin 4: Black probe
Pin 5: 0
Pin 6: 0
Pin 7: 0
Pin 8: 0
I checked 4 times but there is no voltages on any of the pins
Were the various power supplies producing output (DC voltage)?
positive and negative voltage to the op-amps?
voltage from 5-8 on each of the opto-couplers?
voltage on the output transistors?
positive and negative voltage to the op-amps?
voltage from 5-8 on each of the opto-couplers?
voltage on the output transistors?
Shunt 282 Neg 76.0
Shunt 281 Pos 74.7
op amps
pin4 Neg18.7
Pin8 Pos 18.8
opto couplers
left
Pin5 0
Pin8 29.2 volts
right
pin5 neg76.2
pin8 neg7601
left fet output bank
gate 0
drain 74.6
source 0
Right fet output bank
gate Neg76.1
drain 0
source Neg76.2
I see a fine crack in D326 do you have a part # for it
as it checks open
Shunt 281 Pos 74.7
op amps
pin4 Neg18.7
Pin8 Pos 18.8
opto couplers
left
Pin5 0
Pin8 29.2 volts
right
pin5 neg76.2
pin8 neg7601
left fet output bank
gate 0
drain 74.6
source 0
Right fet output bank
gate Neg76.1
drain 0
source Neg76.2
I see a fine crack in D326 do you have a part # for it
as it checks open
512-MMSZ5242B
The voltage on the opto-couplers doesn't seem right. For these, you have to measure directly across pins 5 and 8 (black on 5, red on 8). See if you get the same results measuring that way.
The voltage on the opto-couplers doesn't seem right. For these, you have to measure directly across pins 5 and 8 (black on 5, red on 8). See if you get the same results measuring that way.
The voltage on the opto-couplers doesn't seem right. For these, you have to measure directly across pins 5 and 8 (black on 5, red on 8). See if you get the same results measuring that way.
left 27.6 right 0
left 27.6 right 0
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