Technics RS-X302 - Diodes; Replacement Parts List

RS-X302
Wi SCHEMATIC DIAGRAM (Parts list on pages 28~31.)
(This schematic diagram may be modified at any time with development of new technology.)
Notes:
¢S701: DECK 1 Stop switch (@ STOP). ¢ Resistance are in ohms (Q), 1/4 watt unless specified
¢$702: DECK 1 Fast-forward switch (PP). otherwise.
¢ $703: DECK 1 Rewind switch (<<). 1K=1,000 (Q), 1M=1,000k (Q)
S704: DECK 1 Forward-side playback switch (> PLAY). ¢ Capacity are in micro-farads (uF) unless specified otherwise.
e $705: DECK 1 Reverse-side playback switch (<J PLAY). ¢ All voltage values shown in circuitry are under no signal
¢S708: Reverse mode switch condition and playback mode of deck 2 with volume control at
(REVERSE MODE; <= , 2,O0). minimum position otherwise specified.
¢S709: Dolby noise-reduction selector switch < Srccacsies Voltage values at playback mode of deck 1.
(Dolby NR; B, C). { ) Voltage values at record mode
©$711: DECK 2Stop switch STOP). KF trettetess :
°S712: DECK 2 Fast-forward switch (PP). For measurement us EVM.
°S713: DECK 2 Rewind switch (<4). ° Important safety notice
°S714: DECK 2 Forward-side playback switch (> PLAY). Components identified by A mark have special characteristics
°©S715: DECK 2 Reverse-side playback switch (<] PLAY). important for safety. When replacing any of these
©S$716: DECK 2 Record switch (@ REC). components, use only manufacturer’s specified parts.
°S717: DECK 2 Pause switch (§ PAUSE). °( __<+B> sume ) indicates +B (bias).
©$718: Synchro-start switch (SYNCHRO START). o( <—B> m=em ) indicates —B (bias).
° S719: PACE TD CpeeOL tape-speed selector switch o( «: ) indicates the flow of the playback signal.
*S720: DECK 2 Tape counter reset switch (RESET). Pe OME RNCe Metlon. of neectic: signal:
°S722: DECK 2 Automatic-record-muting switch * The supply part number is described alone in the
(O AUTO REC MUTE). replacement parts list.
©$724: DECK ON/OFF switch in “on” position (DECK).
¢ $951: DECK 1 Mode switch in “off” position. | Ret. No. | Production Part No. | Supply Part No. |
e $952: DECK 1 Cassette half detection switch in “off”
° $953: DECK 1 ATS (CrO,) switch in “off” position.
© $971: DECK 2 Mode switch in “off” position.
¢ $972: DECK 2 Cassette half detection switch in “off”
position.
*
Caution!
¢S973: DECK 2 Rev. Rec Inhibit switch in “off” position. IC and LSI are sensitive to static electricity.
©$974: DECK 2 For. Rec Inhibit switch in “off” position. Secondary trouble can be prevented by taking care during repair.
¢ $975: DECK 2 ATS (CrO,) switch in “off” position. * Cover the parts boxes made of plastics with aluminum foil.
°S976: DECK 2 ATS (Metal) switch in “off” position. * Ground the soldering iron.
* Put a conductive mat on the work table.
* Do not touch the legs of !C or LSI with the fingers directly.
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