Circuit Boards Location - Sony HCD-J3MD Service Manual

HCD-J3MD

6-2. CIRCUIT BOARDS LOCATION

TRANS board
TC board
PANEL board
SW board
BD (MD) board
LOADING board
AMP board
TUNER unit
Entire tuner unit is
suppliled as a single
complete tuner block.
MAIN board
MD DIGITAL board
BD (CD) board
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in
each block.)
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.
1
• All resistors are in and / W or less unless otherwise
4
specified.
• : internal component.
f
• C : panel designation.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
• Voltages and waveforms are dc with respect to ground in
service mode.
• 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.
• no mark : STOP
( ) : PLAY
< > : REC
: can not be measured.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
d : PB (TAPE)
G : REC (TAPE)
J
: CD
c : CD (digital out)
E : PB (MD)
j : REC (MD)
p : PB (digital out)
l : REC (digital in)
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• : parts mounted on the conductor side.
x
• : Through hole.
a
• b : Pattern from the side which enables seeing.
• Indication of transistor
C
Q
These are omitted.
B E
B C E
These are omitted.
49 49
Waveforms – BD (MD) (2/2) SECTION –
– BD ( CD) SECTION –
4
1
3.1Vp-p
IC121 !§ (OSCI)
16.9MHz
IC101 yh XTAI
5
2
1.2Vp-p
IC121 @¶ (LRCK)
(PLAY)
IC101 ta (RF AC)
6
3
2.5V
APPROX 500mVp-p (PLAY) IC121 @• (XBCK)
IC101 $¡ (FE)
7
4
2.5V
APPROX 200m Vp-p (PLAY)
IC121 @ª (FS256)
IC101 #ª (FE)
8
5
2.4Vp-p
IC121 (º (FS4)
7.5 sec
IC101 @§ (MDP)
– BD (MD) (1/2) SECTION – – MAIN (3/3) Section –
1
1
0.46Vp-p
32.768kHz
IC101 1, 2 (I, J) (PLAY mode) IC501 !¡ XC-OUT
2 2
0.1Vp-p
IC101 4 (A) (PLAY mode)
IC501 !£ X-OUT
3
0.06Vp-p
– MD DIGITAL Section –
IC101 8, 9 (E, F) (PLAY mode)
1
10MHz
IC316 !£ (XOUT)
3.1Vp-p
22.581MHz
3.2Vp-p
44.1kHz
3.8Vp-p
2.822MHz
3.8Vp-p
11.29MHz
3.2Vp-p
176.4kHz
5.2Vp-p
5.5Vp-p
16MHz
3.2Vp-p