GEM pRP8 Service Manual

SERVICE MANUAL

Index

2 pRP6 Opening Instructions.
3 pRP7 and pRP8 Opening Instructions.
4 pRP6, pRP7 and pRP8 Test Procedures.
5 Timing Table, pRP6 Block Diagram.
6 pRP7 and pRP8 Block Diagrams.
7 Controls Panel and Display Boards, I/O Amplifier & Supply Boards.
8 L/R Contact, Keyboard Interface Board.
9 pRP6 Cpu & Sound Generator Board.
10 pRP7 and pRP8 Cpu & Sound Generator Board.
11 Spare Part List.
Warnings
1st edition december 2000
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.
✔
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.
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 (
✔
The electrolytic capacitors are 25Vdc rated voltage unless otherwise specified.
✔
All resistors are 1/8W unless otherwise specified.
✔
All switches shown in the "OFF" position. All DC voltages measured to ground with a voltmeter 20KOhm/V.
✔
✔
✔
✔
ATTENTION
Address
✒
GENERALMUSIC S.p.A. Sales Division: 47842 S.Giovanni in Marignano (RN) ITALY - Via delle Rose, 12
CODE: 270245
¤
Phone +39(0)541/959511 - Fax +39(0)541/957404 - GENERALMUSIC on the NET: http://www.generalmusic.com
Ω
) omega symbol of resistance value is substituted by E.
Soldering point. Supply voltage.
Male connector. Test point.
Female connector. Flag joined with one or more flags
M/F faston connector. with the same signal name inscribed.
Observe precautions when handling electrostatic sensitive devices.
Logic supply ground.
Analog supply ground.
Chassis ground.
Earth ground.
1 ❏ ❏ ❏ ❏ ❏