Yamaha DSP-A5 Service Manual page 42

A B
SCHEMATIC DIAGRAM [OPERATION]
1
2
4.9
4.9
–25.7
–25.7
–25.6
–25.7
– 27 .7
– 25 .3
3
• – 27.7
IC501:M30217MA-A203FP
→See page 20~22(EX),
–27.7
–27.7
18~20(J)
–27.7
–27.7
–27.8
0.5
0.4
4
5
6
4.9
7
4.8
4.4
–11.4
–11.4
FULL MUTE
DRIVE
8
C D
E
–25.7
–25.7
4.8
–27.7 4.8
4.8
MICROCOMPUTER
4.8
4.9
4.9
4.9
0 4.9
M30217MA-A203FP 0
4.8
0 4.8
0
4.8
4.8
4.9 4.8
0 4.8
0
4.8
4.9 0.1
4.8
0
3
2.4
2.1
0
G H
F
–20.8
CH1
–27.8
0V
(CH1)
CH2
0V
(CH2)
RESET
+5V
4.8
REGULATOR
0
0
0
0
4
4.8 12.1
5.6
5.6
0.6
0.6
0
0
12.1
12.1
11.4
7.2 PIN CONNECTION DIAGRAM OF DIODES, TRANSISTORS AND IC's.
6.6 1SS133
1SS176
HSS104
0
POWER HZS5B2TD
HZS6B2TD
DOWN
DETECT
Cathode
0.4
0.4 1.5 1.5
0.2
0 0 0
0
: NOT USED
I J
3
Point
(Pin 13 of IC501)
V : 2V/div H : 20µsec/div
DC range 1 : 1 probe
0V
2V SAMPLE 20us
Point 4
CH1 : Emitter of Q504
CH2 : Collector of Q503
V : 5V or 2V/div H : 5sec/div
DC range 1 : 1 probe
S VIDEO
VIDEO
VIDEO AUX
5V 2V SAMPLE 5s
With the POWER Disconnect the
switch turned ON, power cord from
connect the the AC outlet.
power cord to the
AC outlet.
This waveform is not available by pushing the
power switch ON and OFF. AUDIO
TONE CONTROL
11.6
0.1
0.1
0
0.1
0
0.1
–11.2
MAIN L
HZS7A2TD 2SA933S(Q,R) 2SC4038(Q,R,S) NJM78L05A-T3 NJM2068D-D
HZS7B2TD DTC144ES
Anode
1:INPUT
B 2:COMMON
C
E
3:OUTPUT
B
C
E
: USED
All voltages are measured with a 10M Ω /V DC electric volt meter.
Components having special characteristics are marked
must be replaced with parts having specifications equal to those
originally installed.
Schematic diagram is subject to change without notice.
K
DSP-A5
11.6
0
0
0
0
0
0
–11.2
M30217MA-A203FP
51 50
31
80
30
81
100 1
Conditions (DSP-A5)
→ CD
• INPUT
→ minimum(–∞)
• VOLUME
• IMPEDANCE
→ Left
SELECTOR
• PRO LOGIC → On
and
E-50/J-48