Read Sony CMT-EP50LIV / HCD-EP50LIV Service Manual online
HCD-EP50LIV
28
28
3.1 Vp-p
13.5
µ
s
7 Vp-p
13.5
µ
s
2.4 Vp-p
139 ns
•
Waveforms
– MAIN Board –
1
U2
w;
(X2)
4
Q31 (Base) (REC (ISS 1) mode)
2
Q41 (Collector) (REC (ISS 1) mode)
5.1 Vp-p
238 ns
– DISPLAY Board –
1
IC301
7
(X2)
110 Vp-p
12.5
µ
s
2
Q41 (Collector) (REC (ISS 2) mode)
10 Vp-p
13.5
µ
s
3
Q31 (Collector) (REC (ISS 1) mode)
3.1 Vp-p
12.5
µ
s
4
Q31 (Base) (REC (ISS 2) mode)
620 mVp-p
13.5
µ
s
5
Q31 (Emitter) (REC (ISS 1) mode)
620 mVp-p
12.5
µ
s
5
Q31 (Emitter) (REC (ISS 2) mode)
10 Vp-p
12.5
µ
s
3
Q31 (Collector) (REC (ISS 2) mode)
• IC Block Diagrams
– MAIN Board –
– MAIN Board –
U1
LA1837L
U2
LC72131M-TL-M
ALC
BUFF
AM
OSC
AM
MIX
AM
RF. AMP
AGC
IF
DET
S-CURVE
AM/FM
IF-
BUFF
REG
TUNING
DRIVE
GND
VCC
PILOT
DET
VCO
FF
STEREO
DRIVE
STEREO
SW
MUTE
FF
FF
FM
IF
FM
DET
DECODER
ANT 1-BIRDIE
1
2 3
4
5
6
7
9
8
20
19
18
17 16
15
14
11
10
21
22
23
24
25
27
26
29
30
OSC.BUFF
FM-SD.ADJ
AM-OSC
REG
FM-AFC
AM-RF-IN
AGC
MPX-IN
FM-DET OUT
AM-DET OUT
OUT L
OUT R
AMP-IN L
AMP-IN R
AMP OUT R
AMP OUT L
VCO-STOP
STEREO
AM/FM
AM. SD
FM. SD
AM. SD ADJ
IF-BUFF
MUTE
VCC
FM DET
FM-IN
AM-MIX
FM-IF
AM-IF
GND
TUNED
S-METER
FM
S-METER
AM
COMP
SD
AM
12
13
PHASE
DET
28
PHASE
DETECTOR
CHARGE PUMP
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS
PROGRAMMABLE
DRIVER
UNIVERSAL
COUNTER
REFERENCE
DIVIDER
POWER
ON
RESET
1/2
CCB
INTERFACE
1
2 3 4 5
6 7 8 9
16
15
14
13
12
11
10
17
18
19
20
XOUT
VSS
AOUT
AIN
PD
VDD
FMIN
AMIN
XIN
DO
CL
DI
CE
IFIN
IO1
BO4
BO3
BO2
BO1
IO2
UNLOCK
DETECTOR
DATA SHIFT REGISTER LATCH
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