Sony CFS-616S User manual

MICROFILM
SERVICE MANUAL
RADIO CASSETTE-CORDER
E Model
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MF-W616-148
SPECIFICATIONS
CFS-616S
Ver 1.0 1999. 01

CFS-616S
– 21 – – 22 – – 23 –
6-4. SCHEMATIC DIAGRAM –TUNER Section –
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 Ωand 1/4W 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 aretaken with aVOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F: FM/SW
f: MW
• Abbreviation
EA: Saudi Arabia model.
VCO
REGULATOR
FM FRONT-END
AM FRONT-END
MPX
REGULATOR
MONO/STEREO
SELECT
DECORD
AMP
MUTING
AUTO
BLEND
TUNING
INDICATOR
AM IF/
DET
FM IF/
DISCRI
RIPPLE
FILTER
BAND-PASS
MUTE
1
27
28
2930 242526 212223 181920 1617
2 3 4 5 6 7 8 9
PLL LPF1
PILOT DET LPF2 PILOT DET LPF2
ST IND/VCO CHECK
L-CH OUT
VCC
R-CH OUT
RIPPLE FILTER
AGC AFC1
10
AGC AFC2
13
FM IF IN
14
AM IF IN
15
BAND SELECT
11
GND
12
TUNE IND
1/2
COUNTER
1/2
COUNTER
PD1
PD2
FM/AM FE OUT FM GND
FM RF IN AM RF IN FM RF REG FM OSC AFC AM OSC MUTE FM DISCRI GND PLL LPF2 MPX REG VCO
• IC Block Diagram
IC1 CXA1238S

CFS-616S
– 27 – – 28 – – 29 – – 30 –
6-6. SCHEMATIC DIAGRAM – MAIN Section – • See page 31 for IC Block Diagrams.
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 Ωand 1/4W or less unless otherwise
specified.
•C: panel designation.
•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
• Voltagesare takenwith aVOM(Input impedance 10MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion 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
Note: The components identified by mark !or dotted line
with mark !are critical for safety.
Replace only with part number specified.
• Waveforms
– MAIN Board –
1T301 (REC mode)
10V/DIV, 5 µs/DIV
2T301 (REC mode)
1V/DIV, 5 µs/DIV
45.2 Vp-p
14.4
µ s
4.8 Vp-p
14.4
µ s