DOWNLOAD Sony STR-DE235 Service Manual ↓ Size: 3.73 MB | Pages: 34 in PDF or view online for FREE

– 35 –

1

2

3

4

5

6

7

8

V+

VSB/SESIN

VSA

RESET

GND

OUTC

VSC

CR

VREF

+

–

–

+

–

+

–

+

Q

R

S

1

2

3

4

5

6

7

8

9

NC

OUTPUT 2

Vcc

GND

NC

INPUT 2

INPUT 1

NC

MOTOR

DRIVE

MOTOR

DRIVE

REG

SWITCH

SWITCH

OUTPUT1

– 36 –

•

µ

Pin No.

Pin Name

I/O

Description

1 to 7

DIG7 to DIG1

O

Digit drive signal output to the fluorescent indicator tube (FL201)

8

VDD

—

Power supply terminal (+5V)

9

S.CLK

O

Serial data transfer clock signal output to the dolby surround pro-logic circuit (IC300, 301), 
LC78212 (IC401) and PLL IC on FM/AM tuner pack    “L” active

10

S.DATA

O

Serial data output to the dolby surround pro-logic circuit (IC300, 301), LC78212 (IC401) and 
PLL IC on FM/AM tuner pack    “L” active

11

PLL.DATA

I

Serial data input from the PLL IC on FM/AM tuner pack    “L” active

12

S.CE (LC7822)

O

Serial chip enable signal output to the LC78212 (IC401), PLL IC on FM/AM tuner pack
“H” active

13

S.CE (LV1018)

O

Serial chip enable signal output to the dolby surround pro-logic circuit (IC300, 301)
“L” active

14

REAR-RLY

O

Speaker protect relay drive signal output for the rear side speaker    “H”: relay on
Not used (open)

15

BRIDGE-RLY

O

Bridgeable relay drive signal output terminal    “H”: relay on

16

PROTECT

I

Over load detect signal input from the protect circuit    “L”: protect detect

17

RESET

I

System reset signal input from the reset signal generator (IC950, Q201)    “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

18

AUTO-STOP

I

Tuned display detection signal input from the FM/AM tuner pack    “L”: tuned

19

STEREO-IN

I

Stereo detection signal input from the FM/AM tuner pack    “L”: stereo

20

AVSS

—

Ground terminal (for A/D converter analog system)

21

SP-RLY

O

Speaker protect relay drive signal output for the front side speaker    “H”: relay on

22

SURR-RLY

O

Speaker protect relay drive signal output for the surround speaker    “H”: relay on

23

POWER-RLY

O

Relay drive signal output for the power on/off control    “H”: relay on

24

SIGNAL

I

FM and AM signal meter voltage detection signal input from the FM/AM tuner pack

25

A/D-4

I

Key input terminal (A/D input)    S234 to S244 (SET UP, NAME, ENTER, +, –, EFFECT/
DELAY, CENTER, REAR, MODE +, SOUND FIELD ON/OFF, MODE –) keys input

26

A/D-3

I

Key input terminal (A/D input)    S222 to S226, S220, S229 to S231 (BASS BOOST, MUTING, 
SHIFT, 0, MEMORY, CD, MD/TAPE, TV/LD, RDS PTY) keys input

27

A/D-2

I

Key input terminal (A/D input)    S211 to S219, S227 (FM/AM, 6, 5, 4, 7, 8, 9, FM MODE, 
VIDEO, TUNER) keys input

28

A/D-1

I

Key input terminal (A/D input)    S201 to S210 (DISPLAY, RDS EON, 3, 2, 1, TUNING –/+, 
PRESET/PTY SELECT –/+, DIRECT) keys input

29

AVDD

—

Power supply terminal (+5V) (for A/D converter analog system)

30

AVREF

I

Reference voltage (+5V) input terminal (for A/D converter)

31

RDS DATA IN

I

RDS data input from the RDS decoder (IC1)

32

OPEN

—

Not used (open)

33

GND

—

Ground terminal

34

X1

I

Main system clock input terminal (4.19 MHz)

35

X2

O

Main system clock output terminal (4.19 MHz)

36

WOOFER-RLY

O

Relay drive signal output for the woofer speaker    “H”: relay on    Not used (open)

37

LED SELECT

O

LED select signal output terminal    “H” active

38

PROLOGIC LED

O

LED drive signal output terminal    “H”: LED on    Not used (open)

39

C.STUDIO LED

O

LED drive signal output of the CINEMA (D231) indicator    “H”: LED on

40

HALL LED

O

LED drive signal output of the MUSIC (D232) indicator    “H”: LED on

41

ENTER LED

I

Not used (fixed at “L”)

42

VOL DOWN

O

Motor drive signal (volume down direction) output to the volume motor drive (IC202)
“H” active

– 37 –

Pin No.

Pin Name

I/O

Description

43

VOL UP

O

Motor drive signal (volume up direction) output to the volume motor drive (IC202)
“H” active

44

SYS-POWER

I

Power on/off switch (S200 I/

u) input terminal    “L” is input when key pressing

45

TUNER-MUTE

O

Muting control signal output to the FM/AM tuner pack    “H”: muting on

46

RDS CLK IN

I

RDS serial clock signal input from the RDS decoder (IC1)

47

STOP

I

Power down detection signal input from the reset signal generator (IC950)
“L”: power down, normally: “H”

48

VSS

—

Ground terminal

49

SIRCS

I

Sircs remote control signal input from the remote control receiver (IC203)

50

MUTING LED

O

LED drive signal output of the MUTING indicator (D240)    “L”: LED on

51

5.1CH LED

O

LED drive signal output terminal    “L”: LED on    Not used

52

VDD

—

Power supply terminal (+5V)

53

BASS BOOST

O

Control signal output of the BASS BOOST circuit and LED drive signal output of the BASS 
BOOST indicator (D228)    “H”: BASS BOOST on (LED on)

54

FUNC. MUTE

O

Audio line muting on/off control signal output terminal    “H”: muting on

55

IC. MUTE

O

Muting on/off control signal output terminal    “H”: muting on    Not used (open)

56

VERSION

I

Setting terminal for the version

57

S2

O

Video input select signal output terminal    Not used (pull down)

58

S1

O

Video input select signal output terminal    Not used (pull down)

59

LED1

O

LED drive signal output of the CENTER (D233) and REAR (D237) indicators   “H”: LED on

60

LED2

O

LED drive signal output of the NAME (D235) and EFFECT/DELAY (D236) indicators
“H”: LED on

61

LED3

O

LED drive signal output of the SET UP (D234) indicator   “H”: LED on

62 to 70

S15 to S7

O

Segment drive signal output to the fluorescent indicator tube (FL201)

71

VLOAD

—

Negative power supply terminal for the fluorescent indicator tube drive (–24V)

72 to 77

S6 to S1

O

Segment drive signal output to the fluorescent indicator tube (FL201)

78 to 80

DIG10 to DIG8

O

Digit drive signal output to the fluorescent indicator tube (FL201)

– 38 –

The components identified by
mark 

! or dotted line with mark

! are critical for safety.

Replace only with part number
specified.

• Items marked “*” are not stocked since they

are seldom required for routine service. Some
delay should be anticipated when ordering
these items.

• The mechanical parts with no reference num-

ber in the exploded views are not supplied.

• Hardware (# mark) list and accessories and

packing materials are given in the last of the
electrical parts list.

NOTE:

• -XX and -X mean standardized parts, so they

may have some difference from the original
one.

• Color Indication of Appearance Parts

Example:
KNOB, BALANCE (WHITE) . . . (RED)

↑

↑

Parts Color Cabinet's Color

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

1

X-4947-207-1 FOOT ASSY (F50150S)

2

4-210-291-01 SCREW (CASE 3 TP2)

* 3

4-998-206-21 CASE (413226)

not 
supplied

Front panel 
section

not 
supplied

#1

#1

#1

#1

not 
supplied

not 
supplied

Chassis section