Hitachi KH-WS1-WUN Service Manual

No. 0096E

KHWS1W
KHWS1WUN

CONTENTS

SPECIFICATIONS ..................................................................................................................................................... 2

SERVICE POINTS .....................................................................................................................................................3

ADJUSTMENTS ......................................................................................................................................................... 7

TROUBLESHOOTING ............................................................................................................................................... 10

BLOCK DIAGRAM OF ANTENNA AND TUNER UNIT............................................................................................17

DATA OF MICROPROCESSOR ...............................................................................................................................18

SEMICONDUCTORS ................................................................................................................................................. 24

WIRING DIAGRAM ....................................................................................................................................................30

PRINTED WIRING BOARD ....................................................................................................................................... 31

METHOD OF REMOVED IC ..................................................................................................................................... 36

CIRCUIT DIAGRAM ................................................................................................................................................... 37

BLOCK DIAGRAM ..................................................................................................................................................... 41

EXPLODED VIEW...................................................................................................................................................... 43

REPLACEMENT PARTS LIST ..................................................................................................................................45

This documentation is applied to rescrictions for management, export and supply to overseas based on the Wassenaar
Arrangement.

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

November 1999

DIGITAL RECEIVER

HITACHI CONSUMER PRODUCTS (S)

KH-WS1

Check that exposed parts are acceptably insulated from
the supply circuit before returning the repaired instrument
to the customer.

INSTRUMENT

• Checking method

Measure the resistance value between the both poles of
attachment cup (Power supply plug) and the exposed
parts (Parts such as Knob, Cover, etc. where the cus­tomer is easy to touch.) and check that the resistance
value is 500 kohms or more.

Insulation tester (DC 500V)

(Exposed part)

SAFETY PRECAUTIONS

The following precautions should be observed when servicing.

1. Since many parts in the unit have special safety-related characteristics, always use genuine Hitachi’s replacement
parts. Especially critical parts in the power circuit block should not be replaced with other makers. Critical parts
are marked with in the circuit diagram and printed wiring board.

2. Before returning a repaired unit to the customer, the service technician must thoroughly test the unit to ascertain
that it is completely safe to operate without danger of electrical shock.

SPECIFICATIONS

• WS (WorldSpace digital broadcast) Section

Circuit system: Digital Receiver
Broadcast method: WorldStar 1 Method
Receiver frequency: L-Band (1453.384-1490.644 MHz)
Input/Output terminals
Antenna input terminal

Type/Impedance: F-type/50 Ω
Polarization voltage: LHCP 2.5-2.2 V

RHCP 3.3-2.8 V

Max. current supply: 70 mA
External terminal: 9-pin, for future expansion
WS antenna (Built-in, detachable type):

WorldStar 1 Method compatible
antenna
Gain: over 6 dBi
Dimensions: 150 x 33 x 156 mm
(w x h x d)

• Radio Section

Circuit system: FM/MW/SW1/SW2 4-bands

Superheterodyne

Tuning range: FM: 87.5 - 108 MHz

MW: 522 - 1620 kHz (9 kHz steps)

520 - 1620 kHz (10 kHz steps)

SW1:2.300-7.300 MHz

Meter band: 120, 90, 75, 60,
49, 41 m

SW2:9.500-26.100 MHz

Meter band: 31, 25, 21, 19, 16,
13, 11 m

Antennas: FM/SW1/SW2: Telescopic antenna

(aerial)

MW: Built-in ferrite-core antenna

(aerial)

• General Specifications

Power supply: AC: 110-127 V/220-240 V, 50/60 Hz

DC: 6 V
“D” cell or IEC R20 or equivalent x 4
(Optional)
DC input jack
Input voltage : DC 6 V + 30%,
–10% (DC 7.8 V – 5.4 V)

Current consumption: max. 400 mA
Power (mains) consumption: 5 W
Audio output: 3 W (PMPO)

300 mW (DC operation, 10% THD)
Speaker: 65 mm Cone/8 Ω
Output/Impedance: Headphones (stereo)/

Suitable impedance: 8-100 Ω

Line out (stereo)/2.2 kΩ
Battery life time: 30 hours over by using alkaline (LR20)

batteries.

12 hours over by using manganic

(R20P) batteries.

(Use HITACHI battery/Measured

method: EIAJ CP-2905A)
Dimensions: 240.5 x 162.5 x 64.5 mm

240.5 x 162.5 x 93 mm (w x h x d)

(including the WS antenna and handle)
Weight: 1.5 kg (without batteries),

1.9 kg (with batteries)

• Accessories

AC power cord: 1
AC plug adaptor: 1
F-type connector: 1 set (for making an extention coaxial

cable)
Waterproof cover: 1
Waterproof tape: 1

NOTE:

* Specifications are subject to change without notice.

– 2 –

SERVICE POINTS

1. Removal of Back Case (Fig. 1)

(1) Remove 3 screws 1 from the back and 2 screws 2 inside the battery compartment.
(2) Detach the Antenna from the Ant }.
(3) Detach the connector A.

2. Removal of SATELLITE P.W.B. Board (Fig. 2)

(1) Detach all connectors B, C and D.
(2) Remove 1 screw 3 from the Satellite P.W.B. Board.
(3) Remove 2 screws 4 from the Satellite P.W.B. Board.
(4) Release the 3 catches and slide the Satellite P.W.B. Board away.

2. Removal of TUNER P.W.B. Board (Fig. 3)

(1) Detach 5 connectors E, F, G, H and I from the Tuner P.W.B. Board.
(2) Turn to the opposite side, remove 1 screw 5 from the Tuner P.W.B. Board.
(3) Detach 9 catches and separate the Tuner P.W.B. Board from the sub-chassis.

3. Removal of Insulator Pad (Fig. 4)

(1) Remove 6 screws 5 from the Insulator pad.

4. Removal of Main Board (Fig. 5)

(1) Remove 4 screws 6 from the Main Board.

KH-WS1

5. Removal of Speaker (Fig. 6)

(1) Release one end of the metal pin that secures the speaker position.
(2) Slide out the speaker.

6. Removal of POWER SUPPLY P.W.B. Board (Fig. 7)

(1) Remove 4 screws 7 and detach 1 connector J from the Power Supply P.W.B. board.

7. Removal of ANTENNA P.W.B. Board (Fig. 7)

(1) Remove 1 screw 9 from the Antenna P.W.B. board.
(2) Gently pull the Antenna P.W.B. board outwards.

8. Removal of WS ANTENNA SUPPORT PLATE (Fig. 7)

(1) Remove the 6 screws 8 and pull the WS Antenna Support Plate away from the Back case.

– 3 –

KH-WS1

1

Fig. 1

Back case

2

Front case

Battery cover

3

3 Catches

Ant ·

Connector

Sub-Chassis

I

Connector

Connector

Connector

G

Connector

4

F

D

Connector

C

Connector

Connector

A

B

Fig. 2

H

E

Connector

9 Catches

Fig. 3

5

– 4 –

KH-WS1

5

Fig. 4

6

Fig. 5

– 5 –

KH-WS1

metal pin

Fig. 6

9

7

Fig. 7

Connector

J

8

– 6 –

KH-WS1

ADJUSTMENTS

• Adjustment points (Must adjust RADIO Part only. Adjustment on WS Part is not necessary.)

Remarks:

* After adjustment, should be fix following parts by Electro Wax.

"L201, L202, L206"

* After adjustment, do not touch the alighed components. (especially L201 and L202)

– 7 –

KH-WS1

• Adjustments

(1) Before Adjustment

1) Set the Power SW to ON.

2) Set the Radio Function.

(2) Alignment for Tuning Capacitor Voltage Range (Covering)

1) Required Instruments
* Signal Generator
* DC volt meter

2) Alignment Procedure
* Connect a DC Volt meter to TP4 (J201)

Band Output Terminal

FM TP4

MW TP4

SW1 TP4

SW2 TP4

SG frequency & SET Tune Adjustment Reading

87.5 MHz L202 1.4 V ±0.1

108 MHz – 6 ~ 7.5 V

1) 520 kHz (10 kHz step)/522 kHz (9 kHz step) L210 1.2 V ±0.1

2) 1620 kHz CT207 7.2 V ±0.3

3) Repeat step 1-2

1) 2.3 MHz L208 1.1 V ±0.1

2) 7.3 MHz CT205 8.8 V ±0.3

3) Repeat step 1-2

1) 9.5 MHz L209 1.6 V ±0.1

2) 26.1 MHz CT206 9.0 V ±0.3

3) Repeat step 1-2

(3) Alignment for AM IF and MW, SW1, 2 Tracking

Step Item

1 AM IF

2 (1) MW Ant

(2)

(3)

3 (1) SW1 Ant

(2)

(3)

4 (1) SW2 Ant

(2)

(3)

Required Instrument & Connection

Instrument Input Output

Genescope (*1) Ferrite Ant.*2 TP1

AM signal generator F. Ant *2 TP1

400 Hz, 30% Mod.

ACVTM, oscillscope

MW: Note 2 P1 TP1

SW1,2: Note 5

P1 TP1

Remarks: Instrument Connection

*1: With a 470 µF/6.3 V capacitor to the TP2 (-) and J209/+B(+) "IC202".
*2: Mean Note 2 (See page 17)

Note: AM TRACKING ERROR SPEC

6dB.

Genescope or Receiving Adjust Reading

SG Freq. Freq. (Set)

450 kHz High end Freq. T202 Max.

Note 1

600/603 kHz 600/603 kHz L206 Max.

1400/1404 kHz 1400/1404 kHz CT204

Repeat steps (1) & (2)

3.2 MHz 3.2 MHz L205 Max.

7.1 MHz 7.1 MHz CT203

Repeat steps (1) & (2)

11.65 MHz 11.65 MHz L204 Max.

21.45 MHz 21.45 MHz CT202

Repeat steps (1) & (2)

– 8 –

(4) Alignment for FM IF and FM Tracking

KH-WS1

Step Item

1IF

2(1) FM

(2)

(3)

Required Instrument & Connection

Instrument Input Output

Genescope IC201 TP1

FM signal P1 TP1

Generator

400 Hz, 22.5 kHz Dev

Note 6

Note:

1. Feed in a week signal from the Genescope.
Adjust T202 for max. gain and the waveform
of Fig. 1.

2. Connect AM signal generator to loop antenna,

bring near to ferrite antenna.

3. Input signal methode as follows.

Note 3

Genescope or Receiving Adjust Reading

SG Freq. Freq. (Set)

10.7 MHz High End (or T201 Max.

106.1 MHz)Freq. Note 4

90.2 MHz 90.2 MHz L201 Max.

106.1 MHz 106.1 MHz CT201

Repeat steps (1) & (2)

4. Feed in a week signal to IC201 (Note 3) from the

genescope. Use the T201 core to from the S­curve shown in the Fig. 2.
Adjust the symmetry of A and B about point C for
linearity.

5. SW1, SW2 dummy antenna is shown in Fig. 3.

6. FM dummy antenna is shown in Fig. 4.

R1=Rg=SG's output impedance (75 Ω),
R2=75 - Rg/2

(5) Alignment for Clock Time Accuracy

Band Adjustment

FM CT301

Procedure Connection

1) Tune FM to 108 MHz

2) Connect a Freq. Counter to J308 To J308

3) Adjust CT301 to reach the frequency To Counter

118.7 MHz ±1.5 kHz

– 9 –

KH-WS1

TROUBLESHOOTING

1. System Check

Connect to AC outlet.

Check IC301 control circuit.

Does the time

and "BATT"

displays appear

on the LCD,

then they

disappear after

2 seconds?

Yes

IC303 or Q303 is

broken down.

IC303 operation

V in

V out

>3.6V

<3.6V

H

L

Can the time display

appear?

No

Yes

Can the power SW turn

Yes

ON?

Yes

No

Can the power SW turn

ON after pressing the

Reset key?

Yes

No

Is the oscillator circuit of

IC301 and pin

in operation?

No

Yes

Does the port of

No

IC301 pin

operate in "H"?

(+3V)

Does every port of IC301 , , , ,

and pin operate on the following?

Check
IC301.

Is the voltage to the

Voltage Selector set correctly?

Yes

Is the voltage to

IC301 pin 3 V?

Yes

Is the oscillator circuit of

IC301 and pin in

operation?

Yes

Failure in the oscillator

circuit of IC302 pin for

the LCD driver or in IC302

Check "BATT"

display.

Is "BATT"

blinking on

the LCD?

Yes

Check the AC

voltage or replace

the battery in

case of battery

exhaustion.

No

No

No

Disconnect the power cord

and set the voltage correctly.

Check the +3 V line.

Check, the oscillator circuit

or IC301 is broken down.

Check whether IC301 pin

line is in "H" or not.

No

Check Q302, 307
and D318

CN302

<4.2V BATT

Pin

IC301

Pin

blinks.

Check around

IC301.

Is it broken down?

No

Pin No.

21
22
23
50
51
53

Is the LCD display

followed the right table?

OK

WS

H
H
L
H
H
H

Yes

Yes

RADIO

H

L

H

L
H
H

No

Check and follow
the flowchart for

each functions.

Proceed to each flowchart.

– 10 –

LCD display
Display when the power turns ON without
signal.
eg)
Check after resetting.

WS Function

WS SAT

/

SEARCH

/

AFRST - 1

/

Displaying "NO BEAM"

and the function

FM Function

FM 87.50MHz

2. WS section

(1) Determine whether WS circuit malfunctions or communications to control microcomputer malfunction.

LCD Display

STEREO LOCKED

KH-WS1

B

WS Function

Is the display of part on LCD
followed on the following?

WS SAT

"SEARCH"

eg)

AFRST–1

– 1

*

NO BEAM
(when no signal
received)

At receiving

Is there any sound from
speakers even though the
display is correct?

Display
Broadcast name
(when any
signal received)

or

or

Ye s

No

No

Does only the part

of Function

display appear?

LCD display is abnormal
though any trouble is not
found in receiving
operation.

Are the operations
of terminal pins for
CN304 followed on the
table 1 when CN304 is
disconnected?

Ye s

A

C

Ye s

Ye s

No

WS S A T

(SC)

1

WS

LEVEL

Failure in IC301
or CN304

B

Figure 1

Ye s

Problem may in

WS circuit.

Proceed to item (2).

Table 1

PG304
CN304

10 L Clock signal 58 72

11 L L L 60 75

Power Off

(STANDBY)

1L H H55

2 (L) H H H 4 4

3 Clock signal 3 3

5 Clock signal 2 2

6 L L Clock signal 1 1

7H H H77

8 L L L 57 71

9 L Clock signal 59 74

Power On

(NO BEAM)

At receive

IC101 No.

64 Pin 80 Pin

– 11 –

KH-WS1

(2) Checking and flowchart for WS circuit

Determine the display on LCD and the presence or absence of sound from speakers after turning the power ON.

Note: The terminal number of IC101is assumed 64-pin type in the flowchart. For 80-pin type, refer to tables 1 to 4 and note.

1 When no sound from speakers though any trouble is

not found in receiving and display

Start

Is any sound output from

speakers when changing the

mode into RADIO?

Ye s

WS

Function

Is IC103 pin clocked in

at 14.725 MHz

Ye s

Ye s

Are IC102 , , , pin
and IC103 , , , pin

followed the table 3?

Is IC103 pin clocked
out at 24.576 MHz and

clocked into IC102 pin?

Are the operations of IC103

and pin followed the

table 4?

Check the audio circuit

No

around IC206, IC207,

No

Check R155 and

around IC103 pin.

No

Check every port of

IC102 and IC103.

Check around IC102

No

pin and IC103 pin,

IC103 may malfunction.

No

Check around IC103,

IC103 may malfunction.

and IC210.

2 When no operation goes on

Only the part C of figure 1 or abnormal display will appear
on LCD.

Start

Check whether IC301

, and pin are in "H"

or not.

Ye s

Is the oscillator circuit of

IC101 and pin

in operation?

Note : 80 Pin
Type nos. and

IC101 No.

64 Pin

28

29

30

32

33

41

42

43

46

47

80 Pin

36

37

38

40

41

52

53

54

58

59

Power Off

(STANDBY)

No

Is any clock signal found in

IC101 and pin?

Ye s

No

Power On

(NO BEAM)

L

H

L

L

HL

L

HHL

L

L

L

L

L

L

L

L

L

L

HL

HL

Check the terminals

of PG304 to IC101,

IC101 may malfunction.

No

Check the oscillator
circuit or IC101 may

be in failure.

At receive

(reset)

(reset)

(reset)

L

Sync Pulse

Data signal

Clock signal

Data signal

(reset)

(reset)

H

H

H

H

H

H

Connect to
another IC

IC102

27

21

26

25

24

28

20

Table 2

IC103

7

41

40

39

2

IC102

No.

30

31

32

33

Power Off

(STANDBY)

L

L

L

L

Power On

(NO BEAM)

L

L

L

24 kHz

At receive

Clock signal

Data signal

Digital audio data

8 kHz

Table 3

Connect to
another IC

IC103 No.

32

30

25

24

– 12 –

IC102

No.

16

22

23

27

33

Power Off

(STANDBY)

L

L

L

L

L

Power On

(NO BEAM)

L

L

L

H

L

At receive

(Sync puls)

HL

(Sync puls)

HL

H

L

H

Table 4

Connect to
IC 101 No.

64 Pin 80 Pin

27

26

25

24

23

35

33

32

30

28

3 When the operation malfunctions after receiving operation starts

Display of part on LCD:

WS SAT

or or

Continue blinking
of "SEARCH"

NO BEAM

"SEARCH"

KH-WS1

Receiving
operation

"SEARCH"

etc.

Is the oscillator circuit of
IC102 - and -pin in
operation?

or

Can I2C bus line connected from
IC101 - and -pin to all ICs
operate? (80 pin nos. and )

or

Are IC101 -pin and IC102

-pin in "H"?

or

Is every port connected from
IC101 -pin to IC102 and
IC103 in "H"?

When the stations receivable with other units can not be received though the operation is proper

4 When the stations receivable with other units can not be received though the operation is proper

Start

No

No No

No

No

Is the synchronous pulse "H L"
repeated at IC103 -pin?

or

Does IC103 -pin operate
in "L"?

Check the circuits connected to
each IC terminals, the patterns
and the soldered parts, the
concerned IC may malfunction.

No

Check around the
terminals of IC103
and IC101.

Execute "SEEK" Search.
Push MODE and BEAM SEEK keys.

Can IC101 -pin switch "H to L"
after starting SEEK until it ends?
(80 pin: )

Ye s

Does the voltage for RF101 (Tuner) -pin
change from 3 V to 2.4 V when SEEK
search until it ends?

Ye s

Is there voltage output between the center pin
and the ground of the antenna jack on the unit
when the antenna is disconnected?
Does the voltage change from 3 V to 2.4 V
when SEEK search until it ends?

Ye s

No

No

No

Check IC101.

Check IC105 and
IC106.

Check the output line of
IC105 and IC106, and
around the terminals of RF101.

– 13 –

Check the output line of
IC105 and IC106, and
around the terminals of RF101.

No

1

2

3

4

5

6

7

8

9

10

IC101 47Pin
(80pin No: 59)

IC101 28Pin
(80pin No: 36)

IC101 32Pin
(80pin No: 40)

IC101 46Pin
(80pin No: 58)

IC102 12Pin
(80pin No: 16)

IC101 29Pin
(80pin No: 37)

IC101 35, 36Pin
(80pin No: 43, 44)

IC101 30Pin
(80pin No: 38)

IC101 33Pin
(80pin No: 42)

IC101 35, 36Pin
(80pin No: 43, 44)

IC102 20pin

IC103 2pin

IC103 7pin

IC103 39pin

IC102 28pin

IC103 43pin

WS TUNER 8pin

IC103 41pin

IC102 22, 23pin

IC102 27pin

IC103 40pin

IC102 21pin

IC102 22, 23pin

IC terminal no.

IC function / I/O Data Connect to

Check to confirm operation

WS RESET/Output Reset IC102 and IC103.

DCEN/Output

PUP IN/Input

PUP OUT/Output

Clock 14.725 MHz/Output

WRDY/Input

I

2

C BUS / I/O

WSEN/Input

SYNC/Input

I

2

C BUS / I/O I

2

C BUS communication

I

2

C BUS communication

Clock waveform

Turn IC103 on.

Make sure IC103 is turned on.

Turn IC102 on.

IC103 generates 24.576 MHz from this clock
(14.725MHz) for 38-pin out.

IC103 outputs a verification signal for the
clock receiving.

Set each IC to WS mode.

IC101 inputs a verification signal that IC102 has
been in WS mode.

IC102 responds that TSCC data has been
received in WS mode.

Microcomputer reads out the received TSCC
data from IC102.

(3) Operations on WS functions after turning the power on

KH-WS1

– 14 –

3. Check IC 24LC194 (IC107, E2 PROM) of WS function

Check the following after turning the
power ON with displays on LCD or key operations.

Will the LCD display change
as follows?
When there is no signal

WS SAT

e g)

AFRST – 1 or
AFRST – 1

*

"SEARCH"

(Frashing)

Does the display followed
"WS SAT" on LCD become
one of next cases?

Case 1 Case 2

The next display is
not appeared on
LCD.

The next operation
does not go on with
"SEARCH" blinks.

KH-WS1

Case 3

Description of LCD display

Push MODE Key Turn on light "MODE"

Press it successively.

Push PASSWORD Key

Press it secondly.

"PASSW – 01"

NO BEAM

OK

Check IC107, it may
be in failure.

When it can
not operate

Push PASSWORD Key

Press it thirdly.

Push PASSWORD Key

LCD display

First half ID

number always

"00000000"

Press SC Up key.

LCD display

Second half ID

"00001234"

OK

"PASSW – 02"

"ID"

The ID number is displayed on
LCD after 2 seconds.
If "1234"

– 15 –

KH-WS1

4. Radio Section

RADIO Function

Is the key

operations ok?

Ye s

Can each sound of
bands switched and
output?

Ye s

IC301 is in normal
operation. Check other
circuits for RADIO parts.

Cause of malfunction

Are the voltages for

No

PG302 - and -pin
followed on the table 6
when CN302
is disconnected?

Ye s

Check the
circuits G
and H of
S201.

Input port operations of IC301 - and -pin

( Pg

302 – 4 )

( Pg

302 – 5 )

Check IC301.

FM MW SW1 SW2

LH L H

LL H H

No

No

Is the voltage for Q219 collector followed
on the next table when its frequency is up
and down (High end/Low end frequency)?

FM 1. 3 – 1. 4

MW

SW1

SW2

Table 6

Check the operations of - to

-pin and the voltage for key

operation. (Table 5)

Is the LCD display correct if

No

bands are switched each
other?

Q219 collector

Low freq.

1. 1 – 1. 2

1. 0 – 1. 1

1. 5 – 1. 6

Can the indication
of "LOCKED" light?

Check the audio
circuits of IC205,
IC206, IC207 and
IC210.

Ye s

6. 0 – 7. 5

7. 2 – 7. 3

8. 8 – 8. 9

9. 0 – 9. 1

Ye s

High freq.

No

Voltages for IC301 -, - and -pin at
key operations

42 43 44 Voltage (V)

1 7 MEMORY 0.3

2 8 METER 0.8

3 9 WS/RADIO 1.3

40 PTY1.8

5 ST/MONO LANG 2.3

6 BACKS SLEEP 2.8

No

Is the voltage for
IC203 -pin
15 V?

Ye s

Does the local
oscillator work at
IC301 -pin of
Q301 connector
in FM mode, and
at IC202 -pin
and IC301 -pin
in AM mode?

Ye sYe s

Check the line of
IC301 -pin or
the circuits of
Q218 and Q219.

No

No

Ye s

Check IC203 or
L214.

FM : IC201
Q301,
CN301,
D204
AM : IC202
D206,
Check above.

Ta b l e 5

Check IC202 and
Q201 to Q203.

– 16 –

Failure in
IC301

BLOCK DIAGRAM OF ANTENNA AND TUNER UNIT

• Antenna Unit (RF001)

KH-WS1

• Tuner Unit (RF101)

– 17 –

KH-WS1

DATA OF MICROPROCESSOR

1 In case 64 PIN type

HD6472128FA20 or
HD6432127RWV03FA

• Terminal Function

Pin

Symbol I/O Function

No.

1 P50/TxD0 O Signal data output

2 P51/RxD0 I Signal data input

3 P52/SCK0 I / O Clock input/output

4 RES I When this pin is driven low, the chip is

5 NMI I WS POWER ON (Wake Up) signal

6 VCC – +3.3 ∇ power supply

7 STBY I When this pin is driven high, hardware

8 VSS – Ground

9 XTAL – 8.00 MHz Ceramic Oscillator connect

10 EXTAL – 8.00 MHz Ceramic Oscillator connect

11 MD1 I Mode pins setting to “H”

12 MD0 I Mode pins setting to “H”

13 AVSS – Analog Ground

14 P70/AN0 I Not used, setting to “L”

15 P71/AN1 I WS POWER ON (Wake Up) signal

16 P72/AN2 I Not used, setting to “L”

17 P73/AN3 I Not used, setting to “L”

18 P74/AN4 I Not used, setting to “L”

19 P75/AN5 I Not used, setting to “L”

20 P76/AN6 I Not used, setting to “L”

21 P77/AN7 I Not used, setting to “L”

22 AVCC – +3.3 ∇ analog power supply

23 P60 I MPEG-FRAME-Sync signal input

24 P61 I MPEG-CRC-ERROR signal input

25 P62 I MPEG-BC-Sync signal input

26 P63 I BC-FRAME-Sync signal input

27 P64 I BC-FRAME-Toggle signal input

28 P65 O DCEN signal output

29 P66 I Ready signal input

30 P67 O Enable signal input

31 VCC – +3.2 ∇ power supply

reset

input

standby signal

input

Pin

Symbol I/O Function

No.

32 P27 I Power up signal input

33 P26 I Sync signal input

34 P25 I Not used, setting to “L”

35 P24/SCL1 O I2C Serial bus line “clock”

36 P23/SDA1 O I2C Serial bus line “data”

37 P22 O Not used, setting to “L”

38 P21 O Not used, setting to “L”

39 P20 O Not used, setting to “L”

40 VSS – Ground

41 P17 O Not used pin

42 P16 O Not used pin

43 P15 O Not used pin

44 P14 – Not used, setting to “L”

45 P13 O

46 P12 O Power up signal output

47 P11 O Reset signal output

48 P10 I Not used

49 P30 I Fixing to “H”

50 P31 I Not used, fixing to “L”

51 P32 I Not used, fixing to “L”

52 P33 I Not used, fixing to “L”

53 P34 I Not used, fixing to “L”

54 P35 I Not used, fixing to “L”

55 P36 I Not used, fixing to “L”

56 P37 I Not used, fixing to “L”

57 P40/IRQ2 I STRB. signal input from Tuner µcon

58 P41/IRQ1 O STRB. signal output to Tuner µcon

59 P42/IRQ0 I ACK. signal input from Tuner µcon

60 P43 O ACK. signal output to Tuner µcon

61 P44 I Not used

62 P45 O WS Audio mute signal output

63 P46 I Not used

64 P47 O Not used

L/R HCP change signal output LHCP = “L”

– 18 –

2 In case 80 PIN type

HD6472128TF20

• Terminal Function

KH-WS1

Pin

Symbol I/O Function

No.

1 P50/TxD0 O Signal data output

2 P51/RxD0 I Signal data input

3 P52/SCK0 I / O Clock input/output

4 RES I When this pin is driven low, the chip is

5 NMI I WS POWER ON (Wake Up) signal

6 VCC – +3.3 ∇ power supply

7 STBY I When this pin is driven high, hardware

8 VSS – Ground

9 VSS – Ground

10 VSS – Ground

11 XTAL – 8.00 MHz Ceramic Oscillator connect

12 VSS – Ground

13 EXTAL – 8.00 MHz Ceramic Oscillator connect

14 MD1 I Mode pins setting to “H”

15 VSS – Ground

16 MD0 I Mode pins setting to “H”

17 AVSS – Analog Ground

18 P70/AN0 I Not used, setting to “L”

19 P71/AN1 I WS POWER ON (Wake Up) signal

20 P72/AN2 I Not used, setting to “L”

21 P73/AN3 I Not used, setting to “L”

22 P74/AN4 I Not used, setting to “L”

23 P75/AN5 I Not used, setting to “L”

24 VSS – Ground

25 P76/AN6 I Not used, setting to “L”

26 P77/AN7 I Not used, setting to “L”

27 AVCC – +3.3 ∇ analog power supply

28 P60 I MPEG-FRAME-Sync signal input

29 VSS – Ground

30 P61 I MPEG-CRC-ERROR signal input

31 VSS – Ground

32 P62 I MPEG-BC-Sync signal input

33 P63 I BC-FRAME-Sync signal input

34 VSS – Ground

35 P64 I BC-FRAME-Toggle signal input

36 P65 O DCEN signal output

37 P66 I Ready signal input

38 P67 O Enable signal input

39 VCC – +3.2 ∇ power supply

reset

input

standby signal

input

Pin

Symbol I/O Function

No.

40 P27 I Power up signal input

41 P26 I Sync signal input

42 P25 I Not used, setting to “L”

43 P24/SCL1 O I2C Serial bus line “clock”

44 P23/SDA1 O I2C Serial bus line “data”

45 VSS – Ground

46 P22 O Not used, setting to “L”

47 P21 O Not used, setting to “L”

48 P20 O Not used, setting to “L”

49 VSS – Ground

50 VSS – Ground

51 VSS – Ground

52 P17 O Not used pin

53 P16 O Not used pin

54 P15 O Not used pin

55 VSS – Ground

56 P14 – Not used, setting to “L”

57 P13 O

58 P12 O Power up signal output

59 P11 O Reset signal output

60 P10 I Not used

61 P30 I Fixing to “H”

62 P31 I Not used, fixing to “L”

63 P32 I Not used, fixing to “L”

64 P33 I Not used, fixing to “L”

65 P34 I Not used, fixing to “L”

66 VSS – Ground

67 P35 I Not used, fixing to “L”

68 P36 I Not used, fixing to “L”

69 P37 I Not used, fixing to “L”

70 VSS – Ground

71 P40/IRQ2 I STRB. signal input from Tuner µcon

72 P41/IRQ1 O STRB. signal output to Tuner µcon

73 VSS – Ground

74 P42/IRQ0 I ACK. signal input from Tuner µcon

75 P43 O ACK. signal output to Tuner µcon

76 VSS – Ground

77 P44 I Not used

78 P45 O WS Audio mute signal output

79 P46 I Not used

80 P47 O Not used

L/R HCP change signal output LHCP = “L”

– 19 –

KH-WS1

DRD3515A-QG-E3
(IC102)

• DRD3515A Terminal Function

Pin No.

QFP

1 AGNDC BID Analog reference ground

2 AVSS1 SUPPLY Analog ground for audio stages

3 AVSS0 SUPPLY Analog ground for audio output amplifiers

4 OUT1 OUT Not used

5 OUT2 OUT Not used

6 AVDD0 SUPPLY Power supply for audio output amplifiers

7 AVDD1 SUPPLY Power supply for audio stages

8 XTI IN 14.725 MHz quartz oscillator pin 1

9 XTO OUT 14.725 MHz quartz oscillator pin 2

10 AVDD2 SUPPLY VDD for IF input

11 AVSS2 SUPPLY VSS for IF input

12 RCLK OUT Output reference frequency

13 SGND IN Signal GND for IF input

14 IFIN IN Differential IF input

15 IFINQ IN Differential IF input inverted

16 VREFI BID Reference for IF input

17 VSS SUPPLY Digital VSS

18 VDD SUPPLY Digital VDD

19 TEQ IN “H” digital VDD

20 PORQ IN Power On Reset, active low

21 SYNC OUT TSCC mode : TSCC data ready

22 SDA BID I2C Data Line

23 SCL BID I2C Clock Line

24 SCC OUT Service Component Clock

25 SCD OUT Service Component Data

26 SBCW OUT Service Component Wordstrobe

27 WSEN OUT WorldSpace enable output

28 PUP IN Power up

29 OCLK IN 24.576 MHz input oversampling clock

30 BCC OUT Broadcast Channel clock

31 BCD OUT Broadcast Channel data

32 DAI IN Digital Audio Frame Identification

33 DAD IN Digital Audio Data

34 AUX2L IN AUX2 left input for external analog signals (not used)

35 AUX2R IN AUX2 right input for external analog signals (not used)

36 AUX1L IN AUX1 left input for external analog signals (not used)

37 AUX1R IN AUX1 right input for external analog signals (not used)

38 FOUTL OUT Output to left external filter

39 FOPL BID Filter op-amp inverting input, left

40 FINL OUT Filter op-amp output (line out)

41 FOUTR OUT Output to right filter op-amp

42 FOPR BID Right filter op-amp inverting input

43 FINR OUT Filter op-amp output (line out)

44 VREF IN Analog reference voltage

Pin Name Type Description

BC mode : Decryption data from new
SCH available

– 20 –

MAS3506D-QG-E9
(IC103)

• DRD3515A Terminal Function

KH-WS1

Pin No.

QFP

1 TE I Test Enable / Not used / Connected to Ground
2 PORQ I Power ON RESET, Active Low
3 I2CC I O I2C Clock Line
4 I2CD I O I2C Data Line
5 VDD SUPPLY Power Supply for Digital Parts (+3.2 ∇)
6 VSS SUPPLY Ground Supply for Digital Parts
7 DCEN I Voltage Supervision
8 EOD O Not used

9 RTR O Not used
10 RTW O Not used
11 DCSG SUPPLY Ground
12 DCSO O Open Drain “L” / Not used
13 VSENS I DC Converter Voltage Sense
14 PR I PIO DMA Request or Read/Write
15 PCS I PIO Chip Select, Active Low
16 PI19 O BC-Frame-Toggle
17 PI18 I BCINENABLEQ
18 PI17 I PIO Data [17], reserved
19 SIC* I PIO Data [16] (SIC*)
20 SII* I PIO Data [15] (SII*)
21 SID* I PIO Data [14] (SID*)
22 PI13 O MPEG-FRAME-SYNC
23 PI12 O BC-SYNC
24 SOD O Serial Output Data
25 SOI O Serial Output Frame Identification
26 SOC O Serial Output Clock
27 PI8 O MPEG-CRC-Error
28 XVDD SUPPLY Positive Supply of Output Buffers
29 XVSS SUPPLY Ground of Output Buffers
30 SID I Serial Input Data
31 SII I Serial Input Frame Identification
32 SIC I Serial Input Clock
33 PI4 O MPEG-FRAME-SYNC
34 PI3 I AUD-SW, information from headphone jack
35 PI2 I Reserved
36 PI1 I Reserved
37 PI0 I Reserved
38 CLKO O Clock Output (nominal 24.576 MHz)
39 PUP O Power Up, i.e. Status of Voltage Supervision
40 WSEN I WS Enable : Enable Layer 3 Decoding
41 WRDY O WSEN = 0 : Valid clock input at CLKI

42 AVDD SUPPLY Supply for Analog Circuits
43 CLKI I Clock Input
44 AVSS SUPPLY Ground Supply for Analog Circuits

Pin Name Type Description

WSEN = 1 : Clock synthesizer locked to Broadcast Channel data stream

– 21 –

KH-WS1

TC9327F-200 or -800
(IC301)

• Terminal Function

Pin

No.

1 COM 1 OUT Not used

2 COM 2 OUT Not used

3 COM 3 OUT Not used

4 COM 4 OUT Not used

5 S 1 OUT Not used

6 S 2 OUT Not used

7 S 3 OUT Not used

8 S 4 OUT Not used

9 S 5 OUT Not used

10 S 6 OUT Not used

11 S 7 OUT Not used

12 S 8 OUT Not used

13 S 9 OUT Not used

14 S 10 OUT Not used

15 S 11 OUT Not used

16 S 12 OUT Not used

17 S 13 OUT Not used

18 S 14 OUT Not used

19 S 15 OUT Not used

20 S 16 OUT Not used

21 AUDIO OUT Function Output

22 WS OUT

23 RADIO OUT

Terminal I/O Function

Port output will be set as the following table according to the
currently received function.

OFF WS RADIO

AUDIO L H H

WS L H L

RADIO L L H

24 N.C. OUT Not used

25 BAND 0 IN Band Input

26 BAND 1 IN

27 BAND 2 IN

Set port input as the following table in accordance with the currently
receiving band.

BAND 0 L H L H

BAND 1 L L H H

BAND 2 L L L L

FM MW SW1 SW2

– 22 –

KH-WS1

Pin
No.

28 N.C. OUT Not used
29 T7 (P9-0) OUT
30 T6 (P9-1) OUT KEY TIMING O/P TERMINAL
31 T5 (P9-2) OUT
32 T4 (P9-3) OUT Not used
33 N.C. OUT Not used
34 K0 (KEY IN) IN
35 K1 (KEY IN) IN
36 K2 (KEY IN) IN
37 K3 (KEY IN) IN
38 T0 (P1-0) OUT
39 T1 (P1-1) OUT KEY TIMING O/P TERMINAL
40 T2 (P1-2) OUT
41 T3 (P1-3) OUT Not used
42 AD IN 1 IN
43 AD IN 2 IN KEY I/P TERMINAL
44 AD IN 3 IN
45 DCREF IN Not used
46 SDR (SI) IN SERIAL DATA I/P TERMINAL
47 SDATA (SO) OUT SERIAL DATA O/P TERMINAL
48 SCK OUT SERIAL LOCK O/P TERMINAL
49 CE (LCD) OUT
50
51 WS RESET OUT WS RESET O/P TERMINAL
52 N.C. OUT Not used
53 WS STBY OUT WS STBY O/P TERMINAL
54 DTS STB OUT
55 DTS ACK OUT
56 M STB IN
57 M ACK IN
58 ST IN IN STEREO I/P
59 BATTERY IN IN BATTERY REMAINING I/P
60 ST/MONO OUT STEREO/MONO O/P
61 SD IN IN
62 MUTE OUT MUTING O/P H : MUTE L : OFF
63 TEST IN Not used
64 IF IN IN IF SIGNAL I/P TERMINAL
65 PLL OUT OUT PLL O/P TERMINAL
66 PLL OUT OUT PLL O/P TERMINAL
67 HOLD IN IN BACKUP MODE CANCELLING
68 LIGHT OUT LIGHT O/P (Not used)
69 GND — GND TERMINAL
70 FM IN IN FM OSC input
71 AM IN IN AM OSC input
72 VDD — +3.0 ∇ power supply
73 RESET IN

74 XOUT — 75 kHz X’tal oscillator connect
75 XIN — 75 kHz X’tal oscillator connect
76 VXT — POWER FILTER TERMINAL
77 VLCD — Connect to VDD
78 C1 — Not used
79 C2 — Not used
80 VEE — Not used

Terminal I/O Function

KEY I/P TERMINAL

LCD CHIP ENABLE O/P TERMINAL

WS ON (POWER)

OUT WS ON O/P TERMINAL

DTS CHIP ENABLE O/P TERMINAL
DTS ACKNOWLEDGE O/P TERMINAL
MICON CHIP ENABLE I/P TERMINAL
MICON ACKNOWLEDGE I/P TERMINAL

ST DETECTION I/P L : DETECTED

SYS RESET SIGNAL I/P TERMINAL
Connect to VDD

– 23 –

KH-WS1

SEMICONDUCTORS

IC’s

•

PCF8574AT (IC104)

24LC194 (IC107)

PCF8574AT Terminal Function

Pin
No.

1 (AO) Address input 0 not used fixed “H”

2 (A1) Address input 1 not used fixed “H”

3 (A2) Address input 2 not used fixed “H”

4 (P0) CLK Quasi-bidirectional I/ O 0

5 (P1) DATA Quasi-bidirectional I /O 1

6 (P2) EN Quasi-bidirectional I / O 2

7 P3 Quasi-bidirectional I / O 3

8 VSS Supply ground

9 (P4) Quasi-bidirectional I/ O 4 not used

10 (P5) Quasi-bidirectional I / O 5 not used

11 (P6) Quasi-bidirectional I / O 6 not used

12 (P7) Quasi-bidirectional I / O 7 not used

13 (INT) Interrupt output (active low) not used

14 SCL Serial clock line

15 SDA Serial data line

16 VDD Supply voltage

Symbol Description

Pin Function

Name Function

VSS Ground

SDA Serial Address/Data I/ O

SCL Serial Clock

WP Write Protect Input

VCC +3.2 ∇ Power Supply

NC No Internal Connection Fixed “L”

Block Diagram

– 24 –

TA7358AP (IC201)

1

TA8132AF (IC202)

KH-WS1

9

24

1

TA8126F (IC203)

10

1

12

5

BA4510F (IC205, 210)

8

4

1

– 25 –

KH-WS1

TA7368P (IC206, 207)

9

1

BU4066BCF (IC204)

114

78

BA033ST-V5 (IC209)

5

4

3

2

1

– 26 –

MM1385D (IC208)

C01

OPI

VCC

OUT

GND

N.C.GND

5

4

3

12

(SUB)

MM1385H (IC105)
MM1385P (IC106)

V

in

5 4

KH-WS1

V

out

1

5

2

3

4

PST9136N (IC303)

Noise

Cont.

Gnd

3

1

Thermal

Protect

2

5

1

2

4

3

– 27 –

KH-WS1

TC9298F (IC302)

– 28 –

DIODES (including LED)

2

1

1: D Drain
2: G Gate
3: S Source

3

•

KH-WS1

1N4531

Black

1SS355
FM4002

A

TRANSISTORS

•

C

White

1SS133 1N4001 MTZ-J3.6B

Yellow

1SV149

Silver

RB461F SLR56VC3F (RED)

Navy Blue

1SV101

C

A

A

Cathode

Anode

C

HIT9016G 2SA1020 (Y) 2SK242

B Base
C Collector

E Emitter

2SC2412K
2SA1037AK (Q/R)

B Base
C Collector

E Emitter

DTC124EK

DTA144GKA
2SD1757K (Q/R)
2SD1048

3

2

1

1: E Emitter
2: B Base
3: C Collector

2

3

1

1: E GND/Emitter
2: B IN/Base
3: C OUT/Collector

1N4531

B

DTC124EK

1N4531

22 kΩ

22 kΩ

C

E

C

– 29 –

B

DTA144GKA

47 kΩ

E

KH-WS1

ANT PWB

W001

(MX)

CN204

(MX)

CN002

(MX)

PG002

(MX)

PG301

(MX)

PG303

(MX)

PG302

(PH)

PG202 (PH)

CN301 (MX)

Shield

Sheet

White

CN302

(PH)

CN303

(MX)

CN304

(TXL)

W302

SP001

PG201

(PH)

PG204

(PH)

PG304

(TXL)

PG203

(PH)

TUNER

FRONT END

RF101

H.P PWB ASS

LCD

DISPLAY PWB ASS

(pattern side view)

JK101

CN203

(PH)

CN201(PH)

IC201

S201

SAT. PWB ASS

L206 (FERRITE ANT)

TUNER PWB ASS

CT204

ø1.0

Terminal

DC

J

CN001

BATT CASE

BLK

Twisted

ORG

Z001

Add manual

solder

Battery spring

Solder after 1~2T

Winding of conductor part

to battery spring

CAUTION: Do not drop solder inside

speaker or produce solder

spikes when soldering this wire.

3

1

2

1

1~2T Winding of

insulation part

AC

INLET

PS PWB ASS

P, T

Non colour

Bend wire

before

insertion

Bend wire

before

insertion

BLK RED

Gnd

Blue

L2

L1

–

+

WIRING DIAGRAM

– 30 –

PRINTED WIRING BOARD

Soldering Side

HEADPHONE PWB

KH-WS1

Component Side

ANTENNA PWB

POWER SUPPLY PWB

– 31 –

KH-WS1

Soldering Side

Soldering Side

SATELLITE P.W.B.

TUNER PWB

– 32 –

Component Side

KH-WS1

Component Side

SATELLITE P.W.B.

TUNER PWB

– 33 –

KH-WS1

Soldering Side

MAIN PWB

– 34 –

Component Side

KH-WS1

MAIN P.W.B.

– 35 –

KH-WS1

METHOD OF REMOVED IC
IC24LC194 (IC107)

When you reuse a replaced or removed IC, follow the next procedures.

1. Solder pins on the IC more as shown in the illustration.

Solders

2. Melt the solders on the pins of both sides quickly using a soldering iron until the
IC travels from the substrate. At the same time, have a tweezers on hand to pick
up the IC.

3. Pick up and remove the IC with a tweezers slowly when it travels from the
substrate. (Be careful not to delaminate the traces on the substrate.)

Tweezer

Soldering
iron

Tweezer

PWB

4. Remove and clean any redundant solders on traces on the substrate.

5. Remove the solders on leaders of the IC when you reuse it in the future.

– 36 –

CIRCUIT DIAGRAM

TUNER/DTS Circuit

KH-WS1

— 38 —— 37 —

KH-WS1

CIRCUIT DIAGRAM

SATELLITE Circuit

— 40 —— 39 —

BLOCK DIAGRAM

KH-WS1

— 42 —— 41 —

KH-WS1

EXPLODED VIEW

(Cabinet Chassis) • Nos. are reference Nos. of part list

SAT PWB
ASSY

20

10

11

13

25

15

22

17

Front Case Assembly

26

TUNER PWB
ASSY

5

18

6

27

19

33

21

3

43

42

41

12

44

Accessories

14

23

24

32

ANTENNA
PWB

PS PWB
ASSY

16

KEY PWB
ASSY

7

35

29

38

9

30

28

37

40

Back Case Assembly

8

39

34

36

31

7

— 44 —— 43 —

THE UPDATED PARTS LIST

FOR THIS MODEL IS

AVAILABLE ON ESTA

Hitachi, Ltd. Tokyo, Japan

International Sales Division

THE HITACHI ATAGO BUILDING,

No. 15 –12 Nishi Shinbashi, 2 – Chome,

Minato – Ku, Tokyo 105-8430, Japan.

Tel: [phone]

HITACHI EUROPE LTD,

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Lower Cookham Road
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Berkshire
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Munich Office
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Hotline: [phone] (12ct/min)
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ITALY

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B.P. 45, 69671 BRON CEDEX
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