Table Of Contents - Sony CRF-230B Service Manual

CRF-230B
Section
1.
TABLE OF CONTENTS
Section Title Page
OUTLINE? coicccecueticecetecestchec Piste gteiees peed 3
1-1. Specifications 3
1-2. Block Diagram 2.0.0... cece ceeecceceeeeeeoeeee 5
1-3. Technical Features .........ccccccsssccsseeeeees 6
1-4, Circuit Explanations .............cceeeeeeeeee 6
1-5... External "View 2..ceccc.ce.ciiscssuecacavesseneaee 10
1-6. Internal View 0.0... eeesseetseeeeeeeneeeeee 10
V7... Chassis: View ss.icetc.feqvegietssoseceaacstaeute 11
DISASSEMBLY 000... ce ceseeecesseeeeerseeeeee 12
2-1. Rear Cover Removal ..........ccccceseeeeees 12
2-2. Cabinet Removal .0.........cccceeeeseeteees 12
2-3. Front Panel Removal .............:ccceeeeee 13
2-4. Speaker Removal .......ccceeeeeeeenseceeeeees 13
2-5. Fm Front End Block Removal ......... 14
2-6. Main Circuit Board Removal ............. 14
2-7. Sw Front End Block Removal .......... 15
2-8. Cp Circuit Board Removal .......0..0.. 15
2-9. Power Supply Circuit Board
Rei OVal ooo yee scsi let sctececivenetncsaesecs 16
2-10. Dial Cord Stringing ...... eee eeeeeeees 18
CIRCUIT ADJUSTMENTS. ....00... eee 20
3-1. Preparation 00... eee
3-2. A-m I-f Alignment
3-3. Ssb Detector Adjustment ................. 20
3-4. Fm I-f Alignment
3-5. Muting Level Setting ......
3-6. FM1/FM2 Frequency Coverage
and Tracking Adjustment ............. 22
3-7. LW/MW/SW1 Frequency Coverage
and Tracking Adjustment.............. 24
Title Page
3-8. SW2~SW19 Ist I-f Alignment,
Frequency Coverage and
Tracking Adjustment ..............0.06 25
3-9. SW2~SWI19 Frequency Coverage
and Tracking Adjustment ............. 26
3-10. Voltage and Current Adjustment ...... 30
MOUNTING AND SCHEMATIC
DIAGRAMS ooo cece cess netceeeeeeeseeenes 32
4-1. FM1 Front End (P1) ou... cee eees 32
4-2. FM2 Front End (P2) ........ cere 33
4-3. Antenna Terminal (P3) ................0008 34
4-4, Jack Panel (P4) wo... ecceeeeeeceee sees 35
4-5. Cp Circuit Board (P5) ........ece ee eeeeeees 36
4-6. Power Supply Circuit Board (P6) ..... 38
4-7. SW2~SW19 Front End Block (P7)
(SWC-011 D2) ssccnciceceeietnie dew 39
4-8. Switch Circuit Board (P9) ........0.... 44
4-9. Main Circuit Board (P8) .......... eee 45
4-10. Schematic Diagram ............cc.seeeeeeeeeen 47
PACKING AND EXPLODED VIEW .......... 50
S21, Packing +. 2205. kansinic ie etnies 50
5-2. Exploded View (1) ......ccccceecesseeeeeeeeen Sl
5-3. Exploded View (2) vo....cccceccceneeeeeeeen 53
5-4. Exploded View (3) ........ccccecceseeeeereeen 55
5-5. Exploded View (4) .......c..cccceeeseeseeeeen 57
5-6. Exploded View (5) ........cccceccesseeeeneeen 59
5-7. Exploded View (6) .......cccccccsseseeeeeeoen 61
ELECTRICAL PARTS LIST..............::0:0008 62