Hitachi TRK-8190E User manual

©) HITACHI
SERVICE
MANUAL
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GENERAL SECTION
Semi-conductors :
Power (Mains) Supply:
Power (Mains)
Consumption:
Dimensions:
Weight:
Power output:
Speaker:
TUNER SECTION
Circuit System:
‘Tuning Range:
Sensitivity:
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TRK-8190E, E(BS)
No. 1328
KEY TO ILLUSTRATIONS
(A) LED LEVEL INDICATOR (20) BAND SELECTOR
@ TAPE COUNTER @1) TUNING CONTROL
(3) BUILT-IN MICROPHONE (LEFT) (@2) TELESCOPIC ANTENNA (AERIAL)
(4
DOLBY
NR
INDICATOR
(3)
FM
STEREO
INDICATOR
=
(8) FUNCTION SELECTOR OPERATION INDICATOR (For E)
© ea ee AC POWER INDICATOR
For E(BS
(> RECORDING LEVEL CONTROL oD petiole
(RIGHT) 5) BUILT-IN MICROPHONE (RIGHT)
(8) RECORDING MUTE SWITCH 26) PROGRAM SWITCH
(9) DOLBY NR SWITCH @7) PROGRAM RESET SWITCH
(10) AUTO/MANUAL RECORDING @8) MIXING VOLUME CONTROL
CHANGE-OVER SWITCH @9) MIXING SOCKET
(30) TIMER STAND BY BUTTON
)
~
8)
G
)
es
MODE SWITCH
TAPE SELECTOR SWITCH (BIAS)
TAPE SELECTOR SWITCH
(EQUALIZER)
LEVEL INDICATOR SELECTOR
HEADPHONE SOCKET
PAUSE BUTTON
STOP BUTTON
FAST FORWARD/CUE BUTTON
2O@OOE
wo
yy
43) RIF/AFC SWITCH ® PLAYBACK BUTTON
(6 BASS CONTROL (36) REWIND/REVIEW BUTTON
(7) TREBLE CONTROL (7) RECORD BUTTON
(18) VOLUME CONTROL (LEFT) (8) EJECT BUTTON
(19) VOLUME CONTROL (RIGHT) (9) LOUDNESS SWITCH
SPECIFICATIONS
1C’s: 11
Transistors: 33
Diodes: 28
LED: 18
Varicap: 1
Varistors : 2
AC: 220V, 50Hz [For E]
240V, 50Hz [For E (BS)]
DC: 13.5V (IEC R20 x 9)
Car: Use car battery adaptor
24W
540(W) x 304(H) x 166(D) mm
7.6 kg (with batteries)
8W/CH (Max.), 5W/CH (THD 10%)
16cm, 3.2 ohms x 2
5 cm, 4 ohms x 2
FM/SW/MW/LW 4-band
superheterodyne
FM: 87.5 to 108 MHz
SW: 6.0 to 18 MHz
MW: 530 to 1605 kHz
LW: 150 to 350 kHz
FM: 10 dB (pra.) 2dB (max.)
SW: 25 dB (pra.) 20 dB (max.)
MW: 42 dB (pra.) 30 dB (max.)}
LW: 52 dB (pra.) 40 dB (max.}
Intermediate
Frequency:
Antennas (Aerials) :
TAPE RECORDER
Tape:
Tape Speed:
Recording System:
Erasing System:
Frequency Response:
S/N (Signal to Noise
Ratio):
Cross Talk:
Erase Ratio:
Input Sensitivity and
Impedance:
Output Level and
Impedance:
Fast Forward or
Rewinding Time:
Distortion:
Motor:
FM: 10.7 MHz
SW/MW/LW: 468 kHz
FM/SW: Telescopic antenna or
External antenna
MW/LW: Ferrite-core antenna
Cassette tape (C-30, 60, 90)
4.75 cm/s
AC bias, 57 kHz
AC erasing
Normal: 50 ~ 12,000 Hz
CrO,: 50 ~ 14,000 Hz
50 dB (Dolby NR OFF)
60 dB (Dolby NR ON)
50 dB
65 dB
Microphone: 0.4 mV, 500 ohms
Phone: 3 mV, 50 Kohms
Record/Playback(DIN): 6mV, 12 Kohms
Record/Playback(DIN}):
Ext. speaker: 3.2 ohms
775 mV, 5 Kohms
110 sec (Using C-60)
1.5%
DC micromotor
CASSETTE TAPE RECORDER WITH FM/SW/MW/LW RADIO
Feb. 1980

| TRK-8190E, E(BS) |
SAFETY PRECAUTION
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 makes.
Critical parts are marked with A in the schematic diagram and circuit board diagram.
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.
DISASSEMBLY
1.
Head
Cover
3.
Rear
Case
Lift
up
the
head
cover
in
the
direction
of
arrow.
Cassette Lid
4. Main Chassis
Remove nine knobs (Function, Record level, Bass, Treble,
Pe Head Cover
Volume, Band, Tuning).
Press the eject button to release the engagement of the
2; Cassone Ge mechanism and cassette lid. Then lift up the battery
Press the eject button to release the engagement of the sidde-o% the niaih chassis-
mechanism and cassette lid. Then push the both arms
of cassette lid in the direction of arrow.
© Screw Driver

| TRK-8190E, E(BS)
5. Switch and Control PC Board, Loudness PC Board
Loudness PC board
Switch
and
Control
PC
board
BT3x8
6. Cassette Chassis, LED Level Indicator PC Board, DRPS PC Board
aime: copra rege al aeomoag e
aga Oa A a A | RH
Vege HO 3 |
LED Level Indicator
PC board
Cassette chassis

TRK-8190E, E(BS) |
7. Tuner PC Board, Deck/AF/Power PC Board
Deck/AF/Power
PC board
DIAL CORD STRINGING
Tuning shaft (2 Turns)
IP:
|
POINTER: Scale plate
Setting point
STRINGING METHOD
1. Turn the pulley fully counterclockwise.
2. String the dial cord in the direction of
arrow (No. 1 ~ 17).
3.
Set
the
pointer
to
setting
position.

TRK-8190E, E(ES
LUBRICATION
Lubricate one or two drops of machine oil to rotating point Lubrication Oil or grease
or lubricate grease to sliding point. Lubricate the respective
parts listed below once every 1000 hours or once a year
under normal conditions of use. Avoid oiling them exces- Capstan shaft bearing Oil
sively, or rotation may become irregular because of oil
splashes.
Motor shaft bearing
Pressure roller bearing
ADJUSTMENT
TUNER SECTION
Dummy antenna (aerial)
FM ————. 752 — Sw—
o—
8pF 3302
(75—R9)q
RgQ
Rg : SG's output impedance
1. FM IF adjustment
Setting:
@ Function selector: Radio
@ Mode switch: Mono
@ Band selector: FM
Connection:
TP101
33KQ
Genescope
0.01 nF
TP201 (R225)
Adjustment:
Genescope Oe tion: Reading Remarks
— Turn T202 fully counterclockwise.
+
Maximum 1) fc: Specified center frequency of the
ceramic filter.
2) Reduce the level of the genescope to
make one waveform.
10.7 MHz Highest
Adjust 1202 for a symmetrical sinewave
(S curve) output.

_ TRK-8190E, E(BS) -
2. FM RF (Covering & Tracking) adjustment
Setting:
® Function selector: Radio
®@ Mode switch: Mono
®@ Band selector: FM
Connection:
FM Antenna TP201(R225)
terminal
== Dummy Antenna
7 x
P11 Ground
Signal
generator
Dial
pointer
i
Adjust
Readi
Remarks
Frequency
Modulation
position
ju
eading
87.25
MHz
;
El
:
|
Lowest
—_|
t
|
L103
|
HS
coin
=
‘
a
o
Adjustment:
3 | Repeat 1 and 2.
4 90 MHz 90 MHz L101
Tracking 400 Hz 30%
5 106 MHz 106MHz CT101
6 | Repeat 4 and 5.
* For West Germany
3. AM IF adjustment
Setting:
@ Function selector: Radio
@ Band selector: MW
Connection:
Loop
Antenna
Ferrite TP202 (R218)
Antenna
Genescope
i$ Ground |
J
0.01 uF
Adjustment:
Genescope P .
Dial
pointer
Readin
Frequency Modulation ee ST et

| TRK-8190E, E(BS
4, SW RF (Covering & Tracking) adjustment
Setting:
@ Function selector: Radio
@ Band selector: SW
Connection:
©
Ee aol Dummy Antenna
a
| Signal generator | nal generator
| __Signat generator | 7 Dial pointer
Covering 400 Hz 30%
18.5 MHz Highest
Repeat 1 and 2.
6.5 MHz 6.5 MH
Tracking | 6SMHz | 400 Hz 30% ‘
16 MHz 16 MHz CT151
Repeat 4 and 5.
’ 5. MW/LW REF (Covering & Tracking) adjustment
Setting:
®@ Function selector: Radio
@ Band selector: MW or LW
Connection:
Loop Antenna bathe TP202
Antenna
Adjustment:
Ground
1)
MW
Signal
generator
Dial
:
nie
ah
.
j
Reading
Remarks
Frequency Modulation
515 kHz
i +; 400Hz 30%
| 1650 kHz
‘bape
eat cal
600 kHz 600 kHz
+ 400Hz 30% ,
1400 kHz 1400 kHz ot

' TRK-8190E, E(BS) |
Dial pointer Reading
are ‘soe =
Covering 400 Hz 30% Max.
| 2) LW
Pa 1 and 2.
160 kHz 160 kHz
HA sti 400 Hz 30%
| 330kHz | kHz 330 kHz CT153
a 4 and 5.
6. FM MPX (Multiplex) adjustment
Setting:
@ Function selector: Radio
@ Band selector: FM
@ Mode switch: Stereo
Connection:
Connect a 10yF 25V electrolytic
capacitor
between
the
No.
2
pin
P8
of
1C301
and
ground.
Sf
Frequency Counter
Ground (P3)
Adjustment:
a
RT302 19 kHz + 100 Hz
7. FM separation adjustment
Setting:
® Function selector: Radio
®@ Band selector: FM
@ Mode switch: Stereo
Connection:
FM antenna TP301, TP302
terminal (P1) \
FM Stereo SG :
©
Pt Ground

| TRK-8190E, E(BS)
Adjustment:
tp
g Dial pointer Reading
L+R (1kHz): 1) After feeding in of R channel and pilot signals, adjust
RT301
8. FM tuning level adjustment
180mV,
30%
RT301
for
a
minimum
L
channel!
output.
Connect
the
VTVM
to
test
point
TP203.
Supply
the
sweep
signal
to
FM
antenna
terminal
and
adjust
T203
so
that
the
‘mod.
output is maximum.
Pilot (19kH2):
TAPE RECORDER SECTION
20mvV, 10%
The
following
adjustments
shall
be
performed
in
the
sequence
stated
after
the
heads,
the
pressure
roller
and
the
capstan
shaft were cleaned with a cleaning stick moistered in alcohol.
2) Optimize RT301 so that the leak level of the L channel
signal is equal to that of the R channel signal.
1. Tape speed adjustment (motor speed)
Setting ; Playback mode
Connections :
Record/playback
socket (output)
Frequency counter
MTT-111,
3000
Hz
\
(3150 Hz") Ground
* According to DIN 45 500.
Adjustment
:
Warm-up
the
unit
for
approx.
20
minutes.
Then
playback
the
Test
Tape
MTT-111,
3000
Hz
(3150
Hz*)
and
measure
the
speed
deviation
with
the
frequency
counter.
If
required,
adjust
the
semi-variable
resistor
in
the
motor
until
the
frequency
counter
shows
3000
Hz
bie
Hz
(3150
Hz").
The
measurement
shall
be
performed
at
the
middle
of
the
tape.
2. Head azimuth adjustment
Setting : Playback mode
Connections :
Record/playback
socket (output)
|
MTT-316
or
MTT-216
12.5
kHz
\
Ground
Adjustment : Playback the Test Tape (MTT-316 or MTT-216, 12.5 kHz) and adjust the azimuth adjusting screw until
Maximum output is obtained.

- | TRK-8190E, E(BS) |
|
3. Playback gain and level indicator adjustment
Setting : Playback mode
@ Tape selector (EQ) : Normal
Connection : TP401L,R
MTT-150 \
400 Hz 200 nwb/m Ground
Adjustment : Playback the Dolby Calibration Tape(MTT-150, 400 Hz 200 nwb/m) and adjust RT402L/R so that the voltage
at the test points TP401L/R is 0.775V (0 dBm). Then adjust RT404 L/R so that the Level Indicator Lamp (0 dB) lights up.
4. Adjustment of bias leakage
Setting : Recording mode
@ Tape selector (Bias) : CrO2
Connection :
TP403L, R
~
Ground
Adjustment : Set the unit to the recording mode. Adjust L401L, R so that outputs at test points TP403L, R are minimum.
5. Adjustment of bias current
Setting : Recording mode
@ Tape selector (Bias) : Normal
@ Tape selector (EQ) : Normal
@ RT403L/R : Center position
Frequency counter
Connection :
Record/playback
socket (input) Hitachi
UD Tape
Audio
oscillator
Record/playback
socket (output)
Ground
Adjustment :
1) Adjust RT401L/R to center position.
2) Next, turn L402L/R fully clockwise.
3) Record a 1 kHz and a 12.5 kHz signal with a level of 0 dB —20 dB (at test point TP401L/R) on Hitachi UD tapre. Then
playback this tape and adjust RT401L/R so that the output difference is within +2 dB.
=10.=