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

2930 242526 212223 181920 1617

2 3 4 5 6 7 8 9

PLL LPF1

PILOT DET LPF2

ST IND/VCO CHECK

L-CH OUT

VCC

R-CH OUT

RIPPLE FILTER

AGC AFC1

AGC AFC2

FM IF IN

AM IF IN

BAND SELECT

GND

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

4.8 Vp-p

14.4

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