AIWA HSRDS70YZ
Service Manual

ADJUSTMENT
KEY MATRIX Output Input P60 / KR0 TUN � UP TUN � DOWN AF PTY P61 / KR1 � � � RT P62 / KR2 � � MEMO � SET AUTO PRESET P63 / KR3 TRAFFIC PRESET + PRESET � �
VR1
VOLUME

A MAIN C.B

34

6

5

P70 / KR4 P71 / KR5 P72 / KR6 P73 / KR7

IC, TC9418FN Pin No.
1 2 3 4 5 6 7 8 9 ~ 12 13 14 15 16 17 18 19 20 21 22 23 24

TP1(VT)

L102 IC1 L103

TC101

Pin Name
XIN XOUT VXT DOUT DIN CK CE TEST I/O 1 ~ I/O 4 TU OUT FM OUT IF REQ

I/O
I O � O I I I I � O O � Output serial data. Input serial data. Input clock. Chip enable input. Not used. Not used. Crystal oscillator pin. (75 kHz)

Description
7

SFR801 GND IFT105

1

PHONES J1

7

5
L101 BAR ANT

2

Output TUNER/TAPE. �H� = TAPE, �L� = TUNER. Output band. �H� = FM, �L� = AM.

<TUNER SECTION>
Not used. 1. AM IF Adjustment I � I I � � I I Input IF signal. Connected to ground. Input FM band broadcast signal. Input AM band broadcast signal. Power supply. Output phase comparator. (Not used) Output phase comparator. Input in�habit. (Connected to power supply) IFT105 ................................................................ 450kHz 2. FM IF Adjustment L103 ................................................................. 10.7MHz 3. AM VT Check Settings : � Test point : TP1 (VT) Method : Set to AM 531kHz and check that the test point voltage is 1.1V ± 0.3V. Then set to AM 1602kHz and check that the test point voltage is less than 6.5V. 4. FM VT Check Settings : � Test point : TP1 (VT) Method : Set to FM 87.5MHz and check that the test point voltage is 3.0V ± 0.1V. Then set to FM 108.0MHz and check that the test point voltage is less than 9.5V. 5. AM Tracking Adjustment L101 .................................................................... 630kHz TC101 ............................................................... 1440kHz 6. FM Tracking Adjustment L102 ............................................................... 87.5MHz

<TAPE PLAYER SECTION>
7. Tape Speed Adjustment � Test tape : TTA�100 � Test point : PHONES JACK (J1) � Tape selector : NORMAL � S-BASS : OFF � Volume : MAX � Adjustment location : SFR801 Method : Play back the test tape and adjust SFR801 for 3015Hz ± 10Hz(FWD) and 3015Hz ± 45Hz (REV). Then confirm WOW is less than 0.50%. Settings :

IF GAIN IF IN GND FM IN AM IN VDD DO2 DO1 INH

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