LEM P1000 Service Manual

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SERVICE MANUAL

Schematic Diagrams
GENERALMUSIC S.p.A. Sales Division: 47048 S.Giovanni in Marignano (RN) ITALY - Via delle Rose, 12 - tel. 0541/959511 - tlx 550555 GMUSIC I - fax 0541/957404
For a correct operation of the instrument, after having switched off, be careful to wait at least 3 seconds before switching on again.
To improve the device's specifications, the schematic diagrams may be subject to change without prior notice.

Schematic Notes

All components marked by this symbol have special safety characteristics, when replacing any of these components use only
manufacturer's specified parts.
The (µ) micro symbol of capacitance value is substituted by U. The (Ω) omega symbol of resistance value is substituted by E.
The electrolytic capacitors are 25Vdc rated voltage unless otherwise specified. All resistors are 1/8W unless otherwise specified.
C O D E : 2 7 7 3 2 0
Technical Specifications, Test Procedures & Adjustments
Protections, Fuse, Supply, Display, Sockets, Inputs Boards

Notice

Service must be carried out by qualified personnel only.Any tampering carried out by unqualified personnel during the guarantee
period will forfeit the right to guarantee.
Soldering point.
Supply voltage.
Male connector.
Logic supply ground.
Female connector.
Analog supply ground.
M/F faston connector.
Signal ground.
Test point.
Chassis ground.
Flag joined with one or more flags with the same signal name inscribed.
Index & Warnings
2
5
Block Diagram
6
7
Driver & Power Boards
8
Part List, Layout
ATTENTION
Observe precautions when handling
electrostatic sensitive devices
1 1 1 1 1

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Summary of Contents for LEM P1000

  • Page 1: Service Manual

    Protections, Fuse, Supply, Display, Sockets, Inputs Boards Driver & Power Boards Part List, Layout GENERALMUSIC S.p.A. Sales Division: 47048 S.Giovanni in Marignano (RN) ITALY - Via delle Rose, 12 - tel. 0541/959511 - tlx 550555 GMUSIC I - fax 0541/957404 SERVICE MANUAL Notice Service must be carried out by qualified personnel only.Any tampering carried out by unqualified personnel during the guarantee...
  • Page 2 Re-set the Variac at zero voltage, turn off the amplifier and put the fuses TECHNICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS Remarks Remarks Remarks Remarks Remarks back on its holders. Dimensions: (WxHxD) 483x88x445mm (2U) The output coupled transistors TR6-TR11 (MJ15022/B) and TR16-TR22 Connect the oscilloscope probes CH1/2 to the channel outputs, set both (MJ15023/B) are factory selected on V and V...
  • Page 3 voltage must be between 12 and 16V. disconnect the transformers from the mains. Reconnect the 4Ω 1000W load, adjust the level for the maximum dis- Remove the short circuit, after 3 Sec. both PROTECT leds must turn off placement of the scope tracks toward the centre of the scope screen (- HIGH RAIL CHECK: HIGH RAIL CHECK: HIGH RAIL CHECK:...
  • Page 4 (channel. A) or R17 (channel B) to obtain the same amplitude of the scope signals. 1KHz THD+N vs Input Level Frequency & Phase Response AMPLIFIER GAIN CHECK AMPLIFIER GAIN CHECK AMPLIFIER GAIN CHECK AMPLIFIER GAIN CHECK AMPLIFIER GAIN CHECK Set CH2 scope at 50V/div. and connect it to the amplifier output of the channel under test.
  • Page 5 550594 GENERALMUSIC S.p.A. ITALY G. Boccato DWG# PCB# P1000 - POWER AMPLIFIER ALL RIGHTS ARE RESERVED, NO COPIES Ricci/Battelli DISK: PART: BLOCK DIAGRAM OR REPRODUCE THIS DOCUMENT WITHOUT WRITTEN CONSENT BY GENERALMUSIC. APP. Zuccatti REV: 04/09/97 5 5 5 5 5...
  • Page 6 550595 9610038, 9610035, 9610036, 9602004 GENERALMUSIC S.p.A. ITALY BOCCATO DWG# PCB# P1000 POWER AMPLIFIER ALL RIGHTS ARE RESERVED, NO COPIES RICCI/BATTELLI DISK: PART: PROTECTION, FUSE, SUPPLY, DISPLAY, OR REPRODUCE THIS DOCUMENT WITHOUT WRITTEN CONSENT BY GENERALMUSIC. APP. ZUCCATTI REV: 02/09/97 SOCKETS &...
  • Page 7 550596 9610037 & 9610034 GENERALMUSIC S.p.A. ITALY BOCCATO DWG# PCB# P1000 POWER AMPLIFIER ALL RIGHTS ARE RESERVED, NO COPIES RICCI/BATTELLI DISK: PART: CHANNEL A & B OR REPRODUCE THIS DOCUMENT WITHOUT WRITTEN CONSENT BY GENERALMUSIC. APP. ZUCCATTI REV: 02/09/97 DRIVER AND POWER BOARD...
  • Page 8 727591 Single Power Board (Pcb#9610034) (with heatsink) Spare Part List Spare Part List Spare Part List Spare Part List Spare Part List 768149 Single Power Board (Pcb#9610034) (without heatsink) Code Ref. Description 230557 **** 1uh Hor Coil For Amplifier 140891 **** 3 Contacts Hor Male Single-Strip Accessories Accessories...

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