Diagrams - Sony DPS-V55 Service Manual

• Circuit Boards Location
POWER SWITCH board
POWER COVER board
JACK board
(DPS-V55M)
VOLUME board
LCD board
SECTION 5

DIAGRAMS

MAIN board
ENCODER board
– 13 –
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is 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.
• All resistors are in Ω and
1 / W or less unless otherwise
4
specified.
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés par
fied by mark ! or dotted une marque ! sont critiques
pour la sécurité.
line with mark ! are criti-
Ne les remplacer que par une
cal for safety.
piéce portant le numéro
Replace only with part
number specified. spécifié.
• U : B+ Line.
• V : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
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.
• IC Block Diagrams – MAIN BOARD –
IC501, 551 CS4222-KS
28 27 26 25 24 23 22 21 20 19 18 17 16
15
RIGHT
ADC
ANALOG LOW-PASS
& OUTPUT STAGE
LEFT
RIGHT
ADC
VOLUME
DAC
CONTROL
LEFT
VOLUME
DAC
CONTROL
SERIAL AUDIO DATA
CONTROL PORT
INTERFACE
1 2 3 4 5 6 7 8 9 10 11 12 13 14
IC505 TC74VHC74F
14 13 12 11 10 9 8
VCC
PR
Q
D
CK Q
CLR
PR
D Q
CK Q
CLR
GND
1 2 3 4 5 6 7
DPS-V55/V55M
• Signal path.
F : CH1
L : CH2
f : CH3
h : CH4
g : DIGITAL (CH1, 2)
i : DIGITAL (CH3, 4)
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• b : Pattern from the side which enables seeing.
• Indication of transistor.
Q
B C E
These are omitted.
IC703 M62021FP-600C
8 7 6 5
DELAY RESET
DIGITAL
CIRCUIT CIRCUIT
FILTER
COMPARATOR
1.24V
1 2 3 4
– 14 –