Sony ICD-P620 Service Manual page 10

ICD-P620
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For Printed Wiring Boards.
Note:
• X : Parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : internal component.
f
• : Pattern from the side which enables seeing.
Caution:
Pattern face side: Parts on the pattern face side seen from
(SIDE B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(SIDE A) the parts face are indicated.
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF)
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
specifi ed.
• : internal component.
f
• C : panel designation.
• A : B+ Line.
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
– Main (1/2), (2/2) sections –
no mark : PB
( ) : REC
• Voltages are taken with a VOM (Input impedance 10 MΩ).
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.
: PB
E
: REC
a
ICD-P620
• Waveforms
– MAIN Board –
IC101 (XOUT)
1.2 Vp-p
4.096 MHz
0.5 V/DIV, 0.1 μsec/DIV
IC703 (OSC2)
2.8 Vp-p
8 MHz
0.5 V/DIV, 0.1 μsec/DIV
IC703 (XO)
3.5 Vp-p
32.768 kHz
0.5 V/DIV, 20 μsec/DIV
10
• IC Block Diagrams
IC102 MM3111AWLE (MAIN Board (1/2))
IC2002 MM3111AWLE (MAIN Board (1/2))
SHUTDOWN 1
8 VO2
BIAS
BIAS
2
7 GND
6 VDD
+IN 3
5 VO1
-IN
4
IC506 XC9105D091MR (MAIN Board (1/2))
EXT GND
5 4
BUFFER
DRIVER
PHASE
RAMP WAVE
COMPARATOR
GENERATOR,
PHASE
OSC
COMPENSATION
PWM/PFM
CONTROLER
ERROR
CURRENT
AMP
RIPPLE DETED
AND FB
VREF WITH
SOFT START,
CE
1 2 3
FB VDD CE
10
• Semiconductor
Location
(MAIN Section)
Ref. No. Location
(D505) H-6
D701 E-12
D702 E-12
D2001 E-12
D2002 C-6
D2004 C-5
(D2007) I-6
D2008 A-12
IC101 C-9
IC102 D-10
(IC501) J-6
(IC502) G-6
(IC503) I-6
(IC504) H-3
(IC506) I-6
(IC701) I-8
(IC702) G-10
(IC703) I-10
IC2001 D-8
IC2002 D-11
(Q101) G-11
Q106 B-10
(Q506) H-5
(Q507) I-4
(Q508) I-4
Q509 C-4
(Q702) G-10
Q703 C-8
Q704 C-5
(Q2001) H-12
Q2002 C-5
( ): SIDE B