Date: 5/06/03
Equipment: Str'a'sser
SN: CM060
Problem: hum on power supply
Out to:
Repaired: improper grounding at AC power connector
Date: 5/06/3
Date: 5/07/03
Equipment: RCA BK-5, RCA 74
SN:
Problem: No o/p
Out to: Clarence Kane
Repaired:
Date:
Date: 5/08/03
Equipment: 1178 Black Face
SN: 5773
Problem: Power and Ratio buttons intermittent
Out to:
Repaired: replaced with new switch arrays from Purple Audio
Date:
Electrical s Old Repair List
52Date: 5/03
Equipment: Neve 2-pack
SN:
Problem: phantom power switch faulty
Out to:
Repaired: replaced w/ 18-237,035 Newark EAO sw.
Date:
Date: 6/03
Equipment: BSS Compressor
SN:
Problem: Left Ch. distorted
Out to:
Repaired: re-seated VCA pack
Date:
Date: 6/03
Equipment: Altec 175
SN:
Problem: buzz
Out to:
Repaired: 22k resistor btw. cathode and ground broke open, replaced
Date:
Date: 7/03
Equipment: Klark-Teknik DN-34
SN:
Problem: oscillating and distortion on o/p
Out to:
Repaired: Yes but how ?
Date: 7/03
Equipment: Neve 2-pack
SN:
Problem: phantom power switch faulty
Out to:
Repaired: replaced w/ 18-237,035 Newark EAO sw.
Date:
Date: 6/03
Equipment: BSS Compressor
SN:
Problem: Left Ch. distorted
Out to:
Repaired: re-seated VCA pack
Date:
Date: 6/03
Equipment: Altec 175
SN:
Problem: buzz
Out to:
Repaired: 22k resistor btw. cathode and ground broke open, replaced
Date:
Date: 7/03
Equipment: Klark-Teknik DN-34
SN:
Problem: oscillating and distortion on o/p
Out to:
Repaired: Yes but how ?
Date: 7/03
Greg Norman FG
Electrical s Old Repair List
53Date: 7/03
Equipment: Studer 820, MD unit Master TD Control Boards
SN: blacksides
Problem: LEDs and counter displays matrixed-out after power surge. Displays freaked out, blacked out, then started scrolling (ghost in the machine type freak-out) Problem did not go away after cycling the power and resetting the MPUs.
Out to:
Repaired: replaced a 6801 chip on Master MPU, and TD Control, and shorted (erased) all ram chips
Date: 7/03
Date: 7/03
Equipment: Lomo 19-18 + cable
SN: cap 680048, bnd 690039
Problem: crackling noise
Out to:
Repaired: Mics ok, cable had bad shield/ground termination. Made new cables out of mogami tube mic cable.
Later, the connectors on the mic and cable were changed to 5-pin xlr type because of a similar bad ground conduction problem. A highly recommended modification.
Date:
Equipment: Studer 820, MD unit Master TD Control Boards
SN: blacksides
Problem: LEDs and counter displays matrixed-out after power surge. Displays freaked out, blacked out, then started scrolling (ghost in the machine type freak-out) Problem did not go away after cycling the power and resetting the MPUs.
Out to:
Repaired: replaced a 6801 chip on Master MPU, and TD Control, and shorted (erased) all ram chips
Date: 7/03
Date: 7/03
Equipment: Lomo 19-18 + cable
SN: cap 680048, bnd 690039
Problem: crackling noise
Out to:
Repaired: Mics ok, cable had bad shield/ground termination. Made new cables out of mogami tube mic cable.
Later, the connectors on the mic and cable were changed to 5-pin xlr type because of a similar bad ground conduction problem. A highly recommended modification.
Date:
Greg Norman FG
Electrical s Old Repair List
54Date: 7/03
Equipment: 1176 whiteface
SN:
Problem: no o/p dist o/p
Out to:
Repaired: broken lead to 797 board (Alactronics Mod)
Date: 7/03
Date: 7/03
Equipment: Studer 820MCH Blacksides
SN:
Problem: CH19 sync repro level low and failing (auto cal), chan 3-8 repro level is low or irregular at 1K
Out to:
Repaired: replaced C6, C5, C7 elec. caps on repro board, recapped 1st (1-8ch) repro pre-amp board 470uf caps, it improved level on average of 6dB! Recapped the other to head preamp boards.
Date: 7/03
Equipment: 1176 whiteface
SN:
Problem: no o/p dist o/p
Out to:
Repaired: broken lead to 797 board (Alactronics Mod)
Date: 7/03
Date: 7/03
Equipment: Studer 820MCH Blacksides
SN:
Problem: CH19 sync repro level low and failing (auto cal), chan 3-8 repro level is low or irregular at 1K
Out to:
Repaired: replaced C6, C5, C7 elec. caps on repro board, recapped 1st (1-8ch) repro pre-amp board 470uf caps, it improved level on average of 6dB! Recapped the other to head preamp boards.
Date: 7/03
Greg Norman FG
Electrical s Old Repair List
55Date: 7/03
Equipment: RCA 74B
SN:
Problem: no o/p
Out to:
Repaired: broken solder joint between red transformer wire and ribbon
Date: 7/03
Date: 8/01/03
Equipment: Studer 820MCH St A machine
SN:
Problem:
Out to:
Repaired:
Date:
Interesting. I wonder what that was about?
Date: 8/04/03
Equipment: Josephson 609
SN: 2746
Problem: distorts on toms
Out to:
Repaired: bad set screw connection
Date:
Date: 8/04/03
Equipment: Altec 175
SN: #1
Problem: ping noise on snare after being hit by drumstick
Out to:
Repaired: Reseated tube and saw dirt under diaphragm creating 'tents' possibly shorting the diaphragm to back-plate. disassembled capsule housing and cleaned parts carefully.
Date: 8/06/03
Equipment: RCA 74B
SN:
Problem: no o/p
Out to:
Repaired: broken solder joint between red transformer wire and ribbon
Date: 7/03
Date: 8/01/03
Equipment: Studer 820MCH St A machine
SN:
Problem:
Out to:
Repaired:
Date:
Interesting. I wonder what that was about?
Date: 8/04/03
Equipment: Josephson 609
SN: 2746
Problem: distorts on toms
Out to:
Repaired: bad set screw connection
Date:
Date: 8/04/03
Equipment: Altec 175
SN: #1
Problem: ping noise on snare after being hit by drumstick
Out to:
Repaired: Reseated tube and saw dirt under diaphragm creating 'tents' possibly shorting the diaphragm to back-plate. disassembled capsule housing and cleaned parts carefully.
Date: 8/06/03
Greg Norman FG
Electrical s Old Repair List
56Date: 8/8/03
Equipment: Sony C-17
SN:
Problem:
Out to:
Repaired: Modified power connection and ground for our balanced power
Date:
Date: 9/25/03
Equipment: Studer A820MCH
SN: blacksides
Problem: CH2 Sync LFO 'heartbeat' noise
Out to:
Repaired: recapped repro board, works now
Date: 9/25/03
Date: 9/25/3
Equipment: ATR #2
SN:
Problem: Right channel sputtering noise on repro at 30ips only
Out to:
Repaired: replaced Q5 on right channel padnet pwa audio card
Date: 9/29/03
Date: 10/3
Equipment: ATR #2
SN:
Problem: Speed not changing from 30ips
Out to:
Repaired: SSA and SSB busses shorted together at controller connector (remote)
Date: 10/03/03
Date: wurlitzer
Equipment:
SN:
Problem: smoke coming out after wrong fuse was installed
Out to:
Repaired: rectifier diode exploded, repaired, cleaned
Date: 10/07/03
Equipment: Sony C-17
SN:
Problem:
Out to:
Repaired: Modified power connection and ground for our balanced power
Date:
Date: 9/25/03
Equipment: Studer A820MCH
SN: blacksides
Problem: CH2 Sync LFO 'heartbeat' noise
Out to:
Repaired: recapped repro board, works now
Date: 9/25/03
Date: 9/25/3
Equipment: ATR #2
SN:
Problem: Right channel sputtering noise on repro at 30ips only
Out to:
Repaired: replaced Q5 on right channel padnet pwa audio card
Date: 9/29/03
Date: 10/3
Equipment: ATR #2
SN:
Problem: Speed not changing from 30ips
Out to:
Repaired: SSA and SSB busses shorted together at controller connector (remote)
Date: 10/03/03
Date: wurlitzer
Equipment:
SN:
Problem: smoke coming out after wrong fuse was installed
Out to:
Repaired: rectifier diode exploded, repaired, cleaned
Date: 10/07/03
Greg Norman FG
Electrical s Old Repair List
57Date: 10/16/03
Equipment: ATR #2
SN:
Problem: radio noise on left chan
Out to:
Repaired: A mismatch of meter I/O + audio PWA versions caused grounding improper grounding of the audio. This was probably caused by swapping I/O modules or audio boards when I was trouble shooting the sputtering noise problem above.
Date: 10/03
Equipment: ATR #2
SN:
Problem: radio noise on left chan
Out to:
Repaired: A mismatch of meter I/O + audio PWA versions caused grounding improper grounding of the audio. This was probably caused by swapping I/O modules or audio boards when I was trouble shooting the sputtering noise problem above.
Date: 10/03
Greg Norman FG
Electrical s Old Repair List
60I feel much better now..
If you guys have questions please ask. This was transcribed pretty quickly so there might be some confusion.
If you guys have questions please ask. This was transcribed pretty quickly so there might be some confusion.
Greg Norman FG