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CDX-3700
E Model

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) For schematic diagrams · 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. · % : indicates tolerance. ¢ · : internal component. · 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. · Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords. · 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 : FM f : AM J : CD · (( )) : Page of supplement-1. For printed wiring boards · Y : parts extracted from the conductor side. ® · : Through hole. ¢ · : internal component. · b : Pattern from the side which enables seeing. (The other layer's patterns are not indicated.) Caution: Pattern face side: (Side B) Parts face side: (Side A) · (( Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated.

SERVICE MANUAL
SUPPLEMENT-1
File this supplement with the service manual.

Subject : Change of Main and Key Boards
(ECN-CSB00629)

When performing service and inspection, check the suffix of the part number of the main and key boards.

1. DISCRIMINATION

­ MAIN BOARD (SIDE B) ­

)) : Page of supplement-1.

MAIN Board Part No. Former : 1-672-491-11 New : 1-672-491-12 ­ KEY BOARD (SIDE B) ­

KEY Board Part No. Former : 1-672-492-11 New : 1-672-492-12

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CDX-3700

3. SCHEMATIC DIAGRAM -- MAIN SECTION (1/3) --

((Page 5))

· Waveforms

(MODE:PLAY)

1
1.3Vp-p

IC102

9

(ARF)

2
0V Approx. 200mVp-p

IC102

@TM

(TE)

3
0V Approx. 600mVp-p

IC102



(FE)

Note: · Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : CD PLAY

((Page 6))

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CDX-3700

4. SCHEMATIC DIAGRAM -- MAIN SECTION (2/3) --

((Page 4))

((Page 6))

Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM < > : CD PLAY

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CDX-3700

5. SCHEMATIC DIAGRAM -- MAIN SECTION (3/3) --

((Page 5))

((Page 4))

Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : AM < > : CD PLAY

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((Page 7))

CDX-3700

6. SCHEMATIC DIAGRAM -- DISPLAY SECTION --

((Page 6))

Note: · Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM

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