Sony cdx 4240 r service manual

Page 1

CDX-4240R/4250R

SONY»

SERVICE MANUAL

AEP Model
UK Model

SUPPLEM ENT-1

File this supplement with the service manual.

Subject : Change of Main, Display and Mechanism Deck
Servo Boards (MG-36311121 to MG-363X-121)
(ECN-CSSO4462. 805051805059)

When performing service and inspection, check the pent number of the main.
display and servo boards.

1. DISCRIMINATION

- MAIN BOARD (SIDE A) - - SEFIVO BOAFID (CONDUCTOR SIDE) -

IIIIIIIIM

SEFIVO Board Part No.

Former (MG-363T- 121) .' 1 -663-953- 12
MAW Board pan Na New (MG-363X-121) .- 1-659-998-11
Former: 1-572-436-11
New .' 1-672-436- 12

- DISPLAY BOARD (SIDE A) -

VllllllllA

i

DISPLAY Board Part No.
Former: 1-672-442-11
New .' 1-672-442-12

2. EXPLODED VIEWS
- Change of Part List

Page Former (MG-363T-1 21) New (MG-363X-121)
55 Ref. No. Part No. Description Rem ark Part No. DescrIgtion Rem ark
* 115 A-3309-694-A SERVO BOARD, COM PLEI'E 5 A-3309-227-A SERVO BOARD, COM PLEI'E

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 diagram:

- All capacitors are in pF unless otherwise noted. pF: ppF
50 WV or less are not indicated except for eiectrolytics
and tantalums.

- All resistors are in Q and /aW or less unless otherwise
specified.

' % : indicates tolerance.

- A : internal component.

' I:I : panel designation.

Note: The components identified by mark A or dotted line
with mark A are critical for safety.
Replace only with part number specified.

- :B+ Line.

Power voltage is dc14.4V and fed with regulated dc power
supply from ACC and BATT cords.

Voltages are taken with aVOM (Input impedance 10 M9).
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.
I:> : FM
: MW
% : CD
- Abbreviation
G : German model.
- (( )) :Page olsupplement-1.

for printed wiring boards:

- o- : parts extracted from the component side.

- : parts extracted from the conductor side.

- 0 :Through hole.

- ., , : Pattern from the side which enables seeing.
(The other layers patterns are not indicated.)

Caution:

Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.

Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.

- Abbreviation
G : German model.
- (( )) :Page olsupplement-1.

- Waveforms (MODEzPLAY)

Approx. 620mVprp
|C2 (D (FEO)

®
'VV'VV'VVV

Attnztztztztztztzfitzé 3;

tototototototototototo 4
I02 @ (RFO)

Approx. ZOOmVprp
Ic2 @ (TEO)

(D

\_i_I
2.6Vprp
L

I<->I7.6psec
I01 (9) (MDP)

(9
T

5.8Vprp

(4-4 22.7psec
I01 @ (LRCK)

©
1nwe

I<->I474nsec
I01 ® (BCK)

®

3.2Vprp

i

16.89MHZ

I01 (XTAI)