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CFS-616S
SERVICE MANUAL
Ver 1.0 1999. 01
E Model
Model Name Using Similar Mechanism Tape Transport Mechanism Type
NEW MF-W616-148
SPECIFICATIONS
RADIO CASSETTE-CORDER
MICROFILM
CFS-616S
6-4. SCHEMATIC DIAGRAM TUNER Section
· IC Block Diagram IC1 CXA1238S
FM/AM FE OUT 16 13 14 15 BAND SELECT FM IF IN AM IF IN TUNE IND FM DISCRI
MPX REG
PLL LPF2
FM RF AM RF IN FM RF IN
AM OSC
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27 26 25
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22 21
20 19 18
17
FM FRONT-END
AM FRONT-END REGULATOR
VCO
MPX REGULATOR
FM IF/ DISCRI
1/2 COUNTER 1/2 COUNTER
PD1
PD2
AUTO BLEND
TUNING INDICATOR
MONO/STEREO SELECT
MUTING BAND-PASS MUTE
DECORD AMP
RIPPLE FILTER
1 PLL LPF1
2 PILOT DET LPF2
3 PILOT DET LPF2
4 ST IND/VCO CHECK
5 R-CH OUT
6 L-CH OUT
7 VCC
8 RIPPLE FILTER
9 AGC AFC1
10 11 12 AGC AFC2 GND
Note on Schematic Diagram: · All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. · All resistors are in and 1 /4 W or less unless otherwise specified. ¢ · : internal component. · C : panel designation. · U : B+ Line. · H : adjustment for repair. · Power voltage is dc 9V and fed with regulated dc power supply from battery terminal. · Voltages are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : MW < > : SW · Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. · Signal path. F: FM/SW f: MW · Abbreviation EA: Saudi Arabia model.
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FM GND
FM OSC REG
MUTE
GND
VCO
AFC
AM IF/ DET
CFS-616S
6-6. SCHEMATIC DIAGRAM MAIN Section · See page 31 for IC Block Diagrams.
· Waveforms MAIN Board
1 T301 (REC mode) 10V/DIV, 5 µs/DIV
45.2 Vp-p
14.4 µs
2 T301 (REC mode) 1V/DIV, 5 µs/DIV
4.8 Vp-p
14.4 µs
Note on Schematic Diagram: · All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. · All resistors are in and 1 /4 W or less unless otherwise specified. · C : panel designation. Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. · U : B+ Line. · H : adjustment for repair. · Power voltage is dc 9 V and fed with regulated dc power supply from battery terminal. · Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : TAPE PLAY ( ) : TAPE REC · Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. · Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. · Circled numbers refer to waveforms. · Signal path. F : TUNER E : TAPE PLAY (DECK A) d : TAPE PLAY (DECK B) G : TAPE REC (DECK B) N : MIC INPUT
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