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AASSIS LAYOUT (TOP VIEW)
CHASSISLAYOUT (BOTTOM
PRECAUTI
ONS
R
POWE
AMPLIFIER BIAS ADJUSTMENT
AM ALIGNMENT PROCEDURE
FM IF & RF ALIGNMENT PROCEDURE
FM MPX ALIGNMENT PROCEDURE
F M MONO-
STEREO
AUTOMATIC SWITCHING L EVEL
ADJUSTMENT PROCEDURE
FM MUTINGLEVELALIGNMENTPROCEDURE
GAIN
DIAGRAM
TROUBLE
SHOOTING
DIAL STRINGING DIAGRAM
MAIN AMPLIFIER CIRCUIT BOARD DIAGRAM
TECHNICAL
nx-soe
AM
FM STEREO
TABLE
OF CONTENTS
2
3
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4
4
5
6
7
8
8
8
9
9
10
RECEIVER
FM IF AMPLIFIER
CIRCUIT
TONE CONTROL
AMPLIFIER
BOARD
DIAGRAM
FM MPX DECODER
CIRCUIT
AM CONV. & IF AMPLIFIER
BOARD
DIAGRAM
RECTIFIER
CIRCUIT
BOARD
EQUALIZER
AMPLIFIER
CIRCUIT
SCHEMATIC
DIAGRAM
FRONT-END
SCHEMATIC
DIAGRAM
BANDPASS
FILTER
REPLACEMENT
ADDENDUM
REPAIR
PARTS
LIST
MANUAL
BOARD
DIAGRAM
CIRCUIT
BOARD
DIAGRAM
CIRCUIT
DIAGRAM
BOARD
DIAGRAM
11
11
12
.12
13
13
14
17
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18
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19
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Summary of Contents for Rotel RX-602
- Page 1 nx-soe FM STEREO RECEIVER TABLE OF CONTENTS FM IF AMPLIFIER CIRCUIT BOARD DIAGRAM AASSIS LAYOUT (TOP VIEW) TONE CONTROL AMPLIFIER CIRCUIT CHASSISLAYOUT (BOTTOM BOARD DIAGRAM PRECAUTI FM MPX DECODER CIRCUIT BOARD DIAGRAM POWE AMPLIFIER BIAS ADJUSTMENT AM CONV. & IF AMPLIFIER CIRCUIT AM ALIGNMENT PROCEDURE BOARD...
- Page 2 CHASSIS LAYOUT VIEW 1. VRIOI, FM Signal Meter Level Adj. Speaker Terminal Strip VRI 02, FM Stereo Auto-switching Level Adj. Main Amp. Circuit Board 3. FM IF Circuit Board 16. VR601, Bias Adj. 4. VR301, FM MPX 19KHz Adi. 17. VR602, Bias Adj. (R-ch.) S12, De-emphasisSwitch 18.
- Page 3 VIEW ASSIS LAYOUT S3, Monitor-2 Switch Sl I, Power Switch S2, Monitor-I, Switch Headphone Jack Tone Control Amp. Circuit Board SIO, Speaker Selector Switch Terminal 30. VR502, Bass Control Antenna Terminal Strip 31. VR501, Treble Control Fuse S4, Mode Switch Outlet S5, Loudness Switch...
- Page 4 PRECAUTIONS 1. Always disconnect the chassis from power line when always remove all output transistors in that channel and soldering. Turning the power switch OFF is not enough. checkthe bias adjustment, t hecontrol andotherpartsin Power line leakage passingthrough the heating element the network with anohm-meter b eforeinsertinga new may destroy the transistors and IC's.
- Page 5 ALIGNMENT PROCEDURE Instruments: AM SignalGenerator and AC VTVM. Set Selector switch to AM position. NOTES: Input signalmustbe kept aslow aspossible t o avoidAVCaction. Output Indicator Turning Dial Generator Adjust Adjust Step Connected Setting Frequency Coupling No.2 on Maximum reading on 1-204, 203 VTVM Non interfering...
- Page 6 CHASSIS TOP VIEW (FM PORTIO.I) 300-0hm COIL DUMMY CT'. FM ANT TRIMMER L2, FM RF COIL MODEL RX-602 CT2. FM RF TRIMMER L3. FM RF COIL CT3. FM RF TRIMMER CT4. FM OSC TRIMMER BACK VIEW H.D. ANALYZER L4. FM...
- Page 7 MPX circuit functions in FM STEREO GENERATOR VR301 SETTING POINT MONO STEREO MONO VF301 MIDDLE RANGE WHICH STEREO INDICATOR LIGHTS Figure 4-2. RX-602 VR302 STEP OSCILLOSCOPE STEPI VTVM VR303 STEP 2 FM MPX DECODER TOF V IEW FM MPX Alignment Hook-up Figure 4.
- Page 8 FM MONO-STEREO AUTOMATIC SWITCHING LEVEL ADJUSTMENT PROCEDURE 1. Connect a VTVM and an Oscilloscope to the MONI- Setthe Function Selectorto FM position. TOR-2 OUT jack (Left or Right). Set the potentiometer VR102 to counterclockwise 2. Feed the FM signal whose MPX has been varied into the position;this is a conditionat whichAuto-switching FM antenna terminals.
- Page 9 SHOOTING TROUBLE Left or Riqht channel inoperative Unit inoperative If the Left channel is inoperative, check to see if there If the pilot lamp doesnot light, checkthe flow at the is a signal at Main Amp. pcb Pinl. AC Outlet and A.
- Page 10 POWER Q 004 TO POWER AMP POWER 0003 TO C0030 .Glz.-„.zaa. SPEAKER (WHITE) SWITCH (SIOa-8) 0604 (LIGHT- BLUE) VR601 (VIOLET) i. C620 0609 0601 '220 TO-MAIN IN "JACK TO C0020...
- Page 11 DECODER CIRCUIT BOARD DIAGRAM AMPLIFIER TONE CONTROL AMPLIFIER CIRCUIT BOARD DIAGRAM CIRCUIT BOARD DIAGRAM TO CHASSIS GROUND TO FUNC.SW (Sib-5) (Sic-5) (ORAN TO FM MUTING (VIOLET) (VIOLET) m: (WHITE) (WHITE) TO FM IF PCB 0306 TO RECTIFIER (RED) 2 b84 €319 TO CHASSIS (BLAC...
- Page 12 RECTIFIER CIRCUIT BOARD DIAGRAM DECODER CIRCUIT BOARD DIAGRAM TO FOO? TO F003 TO POWER TRANS Q901 TO CHASSIS GRQJND DIAL LAMP TO FM STEREO TOE LIZER PCB(b) TO C003+ TO c002e TO FUNC.SW (Sib-5) (Stc-5) (ORANGE TO FM MUTING VIOLE C90Y BROWN) TO FM IF PCB(b2)
- Page 13 SCHEMATIC DIAGRAM TEST STEREO atos FM FRONT ENO 2SAS"A 0302 0103 RL-U LA'20' 0102 BC829 0106 2sceze 7.2K MX-za RL-es RL-67 2SC829 „•,c220 L____- MUTING 9-430 *216 00 ' SIGNAL FUNC. 3R (LEFT) 0204 MAIN AMP IN (RIGHT) CLEFT) MAIN AMP 060S ascus PRE AMP OUT...
- Page 14 SELECTOR TEST ONLY STEREO serriNG )STEæo 24 v SCHEMATIC 2•SV10p (Owl Rü6 LOCATION (LAST) 0301 0302 --.zcæe 2sceze c 12 '002 C220 TO'. 0902 BADIO R329 MPX AMP C322 EQUALIZER 0901 022@ SC 789 X FUSE RS46 0302 FOO3 TONE CONTROL POWER AC.
- Page 15 FRONT-END SCHEMATIC DIAGRAM 2SC535 2SK19 (SE3001) (MK20) 0.7SP 2.2pH 110.7MHz ' CTI loop ce ISP 100K • 0-3P SOOOP 5000 sooop I 5000P SE3001 (2SC461) • :THESE VALUES VARY 20 p 5000P (2SCt342) I DEPENDING UPON FACTORY ADJUSTMENT. 10 p - FL324U- BANDPASS FILTER...
- Page 16 ADDENDUM the model number of Front-end is changed from 1. The following changes are applied to the units with seri numbers of048980 andabove, and@03651 FL324U to FL321U (Part No.321304378). The dial scale is not changed. above. a. The value Of resistorRI 15 Of emitter 0103 in the I) Q603 and 0611 in main amplifier are changed...
- Page 17 PARTS LIST REPAIR Schematic Schematic Description Part Part Description Location Location D901.902 COILS and TRANSFORMERS 300919017 Hi-Fi SPECIAL, Rectifier Main Amp. FM IFT, Ratio (Pri.) 225501125 LIOI BZ-270, Zener Regulator. 27V 0907 300313006 FM IFT, Ratio (Sec.) 225501127 L102 BZ-120, Zener Regulator, 12V 300313004 0908 223301123...
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