Sony STR-DE135 Quick start guide

MICROFILM
SERVICE MANUAL
FM STEREO/FM-AM-RECEIVER
US Model
AEP Model
UK Model
STR-DE135
SPECIFICATIONS
Photo: US model
Audio power specifications (US model)
POWER OUTPUT ANDTOTAL HARMONIC DISTORTION
With 8-ohm load, both channels driven, from 20 – 20,000 Hz,
rated 100 watts per channel minimum RMS power, with no
more than 0.09 % total harmonic distortion from 250 milli-
watts to rated output.
Amplifier section
Stereo mode (8 ohms at 20 Hz – 20 kHz less than
0.09 % total harmonic distortion)
100 W + 100 W (US model)
(DIN 1 kHz, 4 ohms)
60 W + 60 W (AEP, UK models)
Frequency response TV/SAT, CD, MD/TAPE, VIDEO
(US model)
TV/LD, CD, MD/TAPE, VIDEO
(AEP, UK models)
10 Hz – 50 Hz ± 1 dB
Inputs Sensitivity Impedance S/N
CD,
MD/TAPE, 150 mV 50 78 dB
TV/SAT, kilohms
VIDEO (US model)
Sensitivity Impedance S/N
CD,
MD/TAPE, 150 mV 50 78 dB
TV/LD, kilohms
VIDEO (AEP, UK models)
outputs MD/TAPE REC OUT:
Voltage: 150 mV,
impedance: 10 kilohms
VIDEO AUDIO OUT:
Voltage: 150 mV,
impedance: 10 kilohms
PHONES: Accepts low and high
impedance headphones
Muting Full mute
BASS BOOST + 10 dB at 70 Hz
TONE ± 8 dB at 100 Hz and 10 kHz
Tuner Section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz
Antenna terminals 75 ohms, unbalanced
Intermediate frequency 10.7 MHz
Sensitivity Mono: 18.3 dBf, 4.5 µV
Stereo: 38.3 dBf, 45 µV (US model)
Mono: 18.3 dBf, 2.2 µV/75 ohms
Stereo: 38.3 dBf, 22.5 µV/75 ohms
(AEP, UK models)
Usable sensitivity 11.2 dBf, 2 µV (IHF) (US model)
11.2 dBf, 1 µV/75 ohms (IHF)
(AEP, UK models)
S/N Mono: 76 dB
Stereo: 70 dB
Harmonic distortion at 1 kHz Mono: 0.3 %
Stereo: 0.5 %
Separation 45 dB at 1kHz
Frequency response 30 Hz – 15 kHz dB
Selectivity 60 dB at 400 kHz
AM tuner section
Tuning range 10 kHz interval*
530 – 1710 kHz
9 kHz interval
531 – 1710 kHz (US model)
531 – 1602 kHz (AEP, UK models)
+0.5
–2
– Continued on next page –

STR-DE135
5-3. SCHEMATIC DIAGRAM – MAIN Board (1/2) – • See page 10 for Waveform. •See page 21 for IC Block Diagrams.
– 13 – – 14 –
(Page
25)
(Page
25)
(Page 20)
(Page 19)
(Page
25)
The components identified by mark !or dotted
line with mark !are critical for safety.
Replaceonlywithpartnumberspecified.

STR-DE135
– 19 – – 20 –
5-5. SCHEMATIC DIAGRAM – PANEL Section – • See page 10 forWaveform. • See page 22 for IC Block Diagram.
100k
(Page 14)
(Page
13)
The components identified by mark !or dotted
line with mark !are critical for safety.
Replaceonlywithpartnumberspecified.

STR-DE135
– 21 – – 22 –
• IC Block Diagrams
– MAIN Board –
IC1 BU1922 (AEP, UK models)
IC401 LC78212
QUALITY BIT
GENERATOR
DEFFERENTIAL
DECODER
BIPHASE
SYMBOL
DECODER
OSCILLATOR
AND
DIVIDER
57kHz
BANDPASS
(8th ORDER)
CONTAS LOOP
VARIABLE AND
FIXED DIVIDER
REFERENCE
VOLTAGE
ANTI-
ALIASING
FILTER
CLOCKED
COMPARATOR
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
RECONSTRUCTION
FILTER
141516 13 12 11 10 9
321 4 5 6 7 8
CLOCK REGENERATION
AND SYNC
VP1
RDCL TS7 OSCO OSCI V
DDD
V
SSD
TEST TSTL
D
QUAL
RDDA
Vref
MUX
V
DDA
V
SSA
CIN
SCOUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
CONTROL
LATCH
SHIFT RESISTOR
LEVEL SHIFT
CL
DI
CE
VEE
OUT
IN
OUT
IN
OUT
IN
VSS
S
RESET
VDD
OUT
ININ
OUT
IN
OUT
IN
IC950 NJM2103D
1
2
3
45
6
7
8
V+
VSB/SESIN
VSA
RESET
GND
OUTC
VSC
CR
VREF
+–
–+
–
+
–
+
Q
R S
IC701 µPC2581V
235
46798
1
MUTE
+ VOUT1 – VOUT1
COMP1
MF1
IN1
GND
IN2
NF2
COMP2
– VOUT2 + VOUT2
VCC1 VCC2
VEE
PROTECTOR
BIAS CIRCUIT
REG DRIVE PRE
DRIVE
11
10 12 13 1514
DRIVE
PRE
DRIVE
– DISPLAY Board –
IC202 BA6208
1 2 3 4 5 6 7 89
NC
OUTPUT 2
Vcc
GND
NC
INPUT 2
INPUT 1
NC
MOTOR
DRIVE
MOTOR
DRIVE
REG
SWITCH
SWITCH
OUTPUT1

– 25 –
5-7. SCHEMATIC DIAGRAM – MAIN Board (2/2)/SPK SWITCH Board/SECONDARY Board/
PRIMARY Board/STANDBYTRANS Board –
STR-DE135
R742
1.2k 1/2W
R792
1.2k 1/2W
(Page 14)
(Page 14)
(Page 14)
The components identified by mark !or dotted
line with mark !are critical for safety.
Replaceonly withpartnumber specified.