| CONSOLE DISASSEMBLY |
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| The console consists of six separate subassemblies: the two | ||
| halves of the cabinet, printed circuit board, two keyboards, | ||
r | and a "Clear" |
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The upper and lower halves of the cabinet are separated | |||
| by removing 5 | ||
| moved, the underside of the printed circuit board is exposed. | ||
| Lift the PC board up at the cartridge socket side as shown in | ||
| Fig. 24. This exposes the component side of the board. The | ||
| board stands on edge if set between pillar (near "Clear" switch) | ||
| and flange of cabinet upper half as shown. |
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| CARTRIDGE |
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| RODE ^ |
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| ^k^===^ |
| |
| '^A x% | * |
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| \$ |
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| SV/^/^^^^^ | CART | |
| X^Ss^^ |
| SOCKET |
| ] \^^ |
| SL0T |
"\°
~ | TOP HALF | |
OF CABINET | ||
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| Figure 24. PC Board in Wiring Access Position | |
| NOTE: The | |
| switches, | |
| components mounted on the PC board are not | |
| field replaceable. All PC board faults (except | |
| speaker) require board exchange. | |
| CAUTION: Tuner sprays containing silicon must not | |
r | be used on slide switches. Irrepairable switch dam- | |
age will result. | ||
COMPONENT REPLACEMENT PROCEDURE | ||
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| PC Board Removal | |
| Disconnect black, white and yellow wires from board; un- | |
| solder coaxial cable from board and carefully pull out key- | |
| board ribbon leads from RC board connectors. See "PC Board | |
| Packing and Shipment" for board exchange details (Page 14). | |
| Keyboard Replacement |
1.Keyboard replacement requires console disassembly as
described above.
2.Unplug the ribbon cable of the defective keyboard from
r* the ribbon connector on the PC board by pulling the ribbon
straight out of the connector.
3.Release the keyboard from the console by unlatching
two brown colored latches as illustrated. Keyboard is now
free of console.
Figure 25. Releasing Keyboard from Console
4.Install new keyboard by feeding ribbon cable through opening in console before latching keyboard in place.
5.Push ribbon cable into connector.
NOTE: Some Studio II units use unenclosed rib- bon connectors on PC board. Ribbon cable must center in the connector so that all 1 1 leads contact for proper operation.
6.If ribbon cable from keyboard fails to make good contact
in connector, trim back 1/16 inch from edge with ordinary
household scissors to expose fresh contact.
Figure 26. Trim Ribbon Cable with Scissors to Repair
Damaged Edge
Coaxial Cable Replacement
1Remove bottom half of console cabinet. Pry off metal
shield covering end of coaxial cable.
CAUTION: Pry carefully so as not to damage foil
wiring on PC board.
2.Disconnect cable by unsoldering shield first. Do not overheat foil.
3.Install replacement cable as shown by soldering center
lead first.
4.
11
