Kenwood KRX-593 User manual

STEREO CASSETTE RECEIVER
KRX-593/793
SERVICE
MANUAL
KENWOOD
©1993-2 PRINTED IN JAPAN
B51-4688-00(MC) 2035
Panel Dressing
plate
tuner
Knob
Dressing
plate
amp
Knob
(A60-0397-01:KRX-793)
{BO3-2838-03)
(K29-5708-02)
(BO3-2839-03)
(K29-4112-03)
(A60-0396-01:KRX-593)
Knob power
(K29-41 13-04)
Knob deck
control
(K29-5737-01)
Knob volume
Knob
x
2
control
(K29-5 738-03)
Knob
b:
MIDBO/AL
TAPE
A
TAPE
B
TUNER
PHONG
co
(K27-2103-04)
(K29-5 709-04)
Phone jack
{b
j
{
iy
Knob
(E11-0252-05)
L
ar
(K29-5719-04)
ata a ae tee ae aa es a el
STEREO COURLE CASSETTE OFC
Dressing plate
cassette holder
Dressing plate
cassette holder
(BO3-2835-04) (BO3-2835-04)
Knob
Dressing
plate
deck
Knob
{K29-41
21-03)
(B03-2840-03)
(K29-4-121-03)
Knob Knob
deck
control
Knob
eject
x
2
Cassette
holder
(B)
(K29-41
20-03)
(K29-5736-01)
(K29-5722-04)
|
(AS3-1408-02)
Cassette
holder
(A)
Knob
(A53-1407-02)
(K29-4120-03)
Note
Refer
to
X-722
service
manual
(B51-4376-00)
or
X-45/85
Photo
is
KRX-793
service
manual!
(B51-4347-00),
if
need
description
about
*
Refer
to
parts
list
on
page
47.
cassette mechanism.

KRX-593/793
CONTENTS
ACCESSORIES/REMOTE CONTROL UNIT...............04 3 PC. BOARD... ccceesisiensaniecibedenmasteeieietencsensteaes steste ays 25
CONTROLS AND INDICATORS ............ccccesseesereeeeeees 4 SCHEMATIC DIAGRAM ...........ccceceeeeeesnsneeseeaveneenenes 31
DISASSEMBLY FOR REPAIR.............::csesceeserereereeees 6 EXPLODED VIEW (MECHANISM) ............c0ecsseeseeneeres 47
BLOCK DIAGRAM .............ccccscceceeeeeneneueeeeeeeaeeeseeens 8 EXPLODED VIEW (UNIT)..........::cesseeessnereeeeeeenenseeanes 48
CIRCUIT DESCRIPTION. ...............cecesecesesenseeereuensenes 9 PARTS LIST. os ecveccedes secacacte ae tis dyetideaencesversaeeteasessars 51
ADJUSTMENT ..... 0c. .ccccecceceeeeeeeteesersueceeaseeeeesateeenes 20 SPECIFICATIONS. ..........ccccecseneeeeeeenenaneesenens Back cover
WIRING DIAGRAM ...........:.::ccecceeesecureeceeesereesesaerees 23
Rear panel
Power cord
Stide
switch
Phono
jack
Metallic
cabinet
AC
outlet*
bushing
(S31-2132-05)
(E63-0009-05)
(A01-3069-11)
(E03-)
(J42-0083-05)
Slide switch
Phono
jack
($31-2322-05)
(E63-0008-05)
(M
only)
=
a 7 e O: wom
a ee L
oe
a
biaes
A
CALTON
ATTENTION
A
i ee t bes
f
=e
Mao
Thy Fugue wun
CE EMARS Cnet
Lock terminal board
(E20-0476-05)
we
’ 4
"6
PIN
(J12-0091-05)
Phono jack
({E63-0008-05)
Miniature
phone jack
(E11-0188-05)
PEEVE UTEP
HITE
ibid SUUTTE
r 6
Slide
switch
Lock
terminal
board
AC
power
cord*
($31-2095-05)
(E20-
1405-05)
(E30-)
Photo is KRX-793
*
Refer
to
parts
list
on
page
47.

KRX-593/793
ACCESSORIES/REMOTE
CONTROL
UNIT
ACCESSORIES
@
AM
loop
antenna...
1
@
FM
indoor
antenna...
1
®
Batteries
(ROG/AA)..
@
Remote
control
unit
...
1
(T90-0174-05)
(T90-0182-15)
(A70-0592-05}
2
BATTERY
COVER
(AQ9-01 12-08)
@ Loop antenna stand.. 1 @ AC plug adaptor....... 1
(J19-3583-04)
(Except
for
some
areas)
{E03-0115-05) a
FP
REMOTE CONTROL UNIT
KENWOOD
REMOTE CONTROL UNIT
AY iS2
See |
TAPE B
Som o
Cassette Deck A
operation keys
Cassette Deck B
operation keys
CD player
operation
keys
Turntable
operation keys
Tuner
operation
keys
Graphic
equalizer
operation
keys
VIDE
TUNER /AUx
Input select
MUTE (Muting) key
keys
TARE 4 TAPE 8
VOLUME CONTROL
POWER key DOWN/UP key
SLEEP timer key
Model name: RC-892
Infrared system
:

KRX-593/793
CONTROLS AND INDICATORS
@ Tuner
Stereo (ST) indicator SLEEP indicator
AUTO
indicator
ON
time
indicator
OFF
time
indicator
Memory
(MEMO.)
TUNED
indicator
Timer
program
No. indicators
indicator
Band select indicators
Frequency display
Display
SLEEP timer key TUNING key
POWER key Remote sensor
(DOWN/UP)
P.CALL key
Numeric keys ADJUST key BAND select key
Preset channel keys
EXE. 1 2 key
{Timer execution)
PROG. 1 key
PROG. 2 key
(Program)

KRX-593/793
CONTROLS
AND
INDICATORS
m@ Amplifier
Tone control knobs
BASS
Input
indicators
VOLUME
CONTROL
knob/
TREBLE.
Point
indicator
I
KENWOOD | stereo nrecraTen AMPURER KAX-
PHONES jack
Input select keys
SPEAKERS
ON/OFF
key
BALANCE
control
knob
@ Cassette deck
CRLS
DOLBY
NR
ONE
WAY
indicator
(indicator
PAUSE
MODE
indicator
indicator
DUBBING
eooe
RECording
indicators
‘
;
indicator
Deck
A
Deck
B
Tape
transport
Tape
transport
direction
indicators
direction
indicators
Cassette
holder
EJECT
key
EJECT
key
Cassette
holder
(DeckA)
(Deck
A)
(Deck
B)
(Deck
B)
Rewind
key
Fast
foward
PAUSE
key
Ravers
ney
DOLBY
NR
key
play
key
|
Play
key
CRLS
key
Stop
key
ONE
WAY
MODE
key
Dubbing
keys
NOR.
HIGH
Operation keys for deck B
RECording key
Operation keys for deck A

KRX-593/793
* After removing the case, perform disassembly for repair as follows.
1) Removing the front panel
1g
2. Remove the nine screws (@).
3. Remove the front panel in the direction of arrow.
2) Removing the cassette mechanism and PC board
1.
. Disconnect the control cable from CN901 and CN902
. Remove the two screws (@), then remove the PCB
. Remove the two screws, then remove the lead plate (@).
. Remove the eight screws and two springs (@), then re-
. Remove the thirteen screws (@), then remove the PC
. Remove the EJECT knobs (@).
DISASSEMBLY FOR REPAIR
Remove the two knobs (@), and two screws (@).
Note: When checking the electrical operation, connect
the ground of front panel side with the ground of
main side.
Disconnect the head lead from CN301 and CN302 of
PCB-REC/PLAYBACK (@), then cut the wire band.
of PCB-REC/PLAYBACK (@).
SP.JACK.
move the cassette mechanism.
boards.

3)
Removing
the
PCB-SW
TUNER,
PCB-TONE,
PCB-PHONE
DISASSEMBLY FOR REPAIR
and PCB-SW POWER
a
2.
Remove the three screws (@) of frame.
Remove the four screws (@), then re-
move the right frame.
. Remove the three screws (®), then re-
move the PCB-SW TUNER.
_ Remove the two knobs (@) and six
screws (@), then remove the left frame.
. Remove the two nuts (@), then remove
the PCB-TONE.
. Remove the one knob (@) and two
screws (@), then remove the
PCB- PHONE.
_ Remove the two screws (@), then re-
move the PCB-SW POWER.
4) Removing the rear panel
Ds
2.
Remove the seven screws (@).
Remove the two hooks while moving the main chassis
in the direction of arrow (GJ), then remove the rear panel
in the direction of arrow (@).
5) Removing the repairing chassis
1. Cut the four parts (@) of the repairing chassis. (®)
2.
After
repairing,
turn
the
repairing
chassis
180
degree,
then lock to the main chassis by two screws (M3 x8).
®)
KRX-593/793

BLOCK DIAGRAM
KRX-593/793
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KRX-593/793
CIRCUIT
DESCRIPTION
RECEIVER (AMPLIFIER TUNER) SECTION
1. CONDITIONS BY DESTINATION
PLL (LM7001)
output port
@
50kHz H L
PLL reference
frequency
Intermediate
frequency
Destination Receiving frequency
type range
Interchannel space
87.5 ~ 108.0MHz 50kHz/ 100kHz + 10.7MHz
531 ~ 1602kHz
1530 ~ 1610kHz
87.5~ 108.0MHz
530 ~ 1700kHz 10kHz
87.5~ 108.0MHz 50kHz
531 ~ 1602kHz 9kHz
9kHz/10kHz + 450kHz 9kHz/1OkHz
+10.7MHz 50kHz
+ 450kHz 10kHz
+ 10.7MHz 5OkHz
+ 450kHz 9kHz
100kHz
3. TEST MODE
@ Operation
Insert
the
AC
plug
into
the
wall
outlet
while
holding
down
poues
oF
the
selector
TAPE
A
key.
INPUT
TUNER
®
Cancel
MOLE
oF
Press
the
PHONO
key
(lighting
cance!
only)
or
pull
the
AC
BAND
FM
plug
out
of
the
wall
outlet
(reset)
when
ail
indicators
are
lit
2. INITIAL STATE
AMP section
TUNER section
Receiving frequency
TUNING MODE
Preset state
87.5MHz
AUTO
Test frequency
TIMER section
Cloc.
Timer program (1) and (2)
Execution mode
0:00
ON 0:00
OFF 0:00
Non-execution
2-1. Initial state setting
The initial state is set in the following cases:
1) When the backup memory is erased.
2) When the AC plug is inserted into the wall outlet while
holding down the selector TUNER key.
2-2. Test frequency in initial state
The frequency preset for each channel in the initial state is as
shown in the table.
Channel Frequency
1 98.0MHz
108.OMHz
630kHz
990kHz
1440kHz
1610kHz (1602kHz)*1
1700kHz (87.5MHz)*2
87.5MHz
87.5MHz
89.1MHz
87.5MHz2
2
3
4
5
6
7
8
9
“41 1602kHz is set for 9kHz step only.
*2 87.5MHz is set for NARROW band only.
with the power on.
Contents
The
power
is
automatically
turned
on,
and
fluorescent
dis-
play
indicators
and
LED
indicators
light.
The
fluorescent
dis-
play
indicators
and
LED
indicators
return
to
the
normal
state
when
the
PHONO
key
is
pressed
with
the
indicators
and
power
on.
The
volume
control
motor
drive
test
can
be
per-
formed
in
the
test
mode
with
the
selector
TAPE
B
key.
The
volume
is
increased
when
this
key
is
pressed
with
the
VOLUME
knob
at
minimum.
The
volume
is
decreased
after
about
14
seconds,
then
the
key
is
set
to
off
after
about
14
seconds.
3
;
:

<RX-593/793
CIRCUIT DESCRIPTION
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KRX-593/793
CIRCUIT DESCRIPTION
4-2. Pin Function
Name
Description
Pin Name
1~4
$3~S0
Oo
d~a
Segment
drive/key
scan
5~8
|
POO
~
PO3
|
KRO~KR3
Key-matrix,
key
return
input
9
P10
|
REMIN
Remote
cotnrol
input
Active
Low
10
P11
|
CE
Backup
detection
Active
Low
11
P12
|
STEREO
Stereo
broadcast
detection
Active
Low
SD
Station
detection
Active
Low
P13
CLK
DATA
P20
Control
PLL
IC
(LM7001)
clock
P21 Control PLL IC (LM7001) data
16
P22
ST
(CE)
Control
PLL
IC
(LM7001)
strobe
16
P23
MUTE
Mute
signal
output
Active
Low
17
P30
10
i
BUSY
System
control
signal
input/output
(BUSY)
18
P31
1/0
SDATA
System
control
signal
input/output
(DATA)
P32,
P33
No
used
GND
21
P60
|
PROTECT
Protection
signal
input
22
P61
I
LW
OFF
Institute
band
‘‘Long
Wave"’
L:
LW)
H:
OFF
23
P62
|
CH-SPACE
Institute
‘‘Channel
space’’
(FM)
L:
100K
H:
50K
24 P63 No used
25
P40
Oo
POWER
Power
relay
control
H:
Power
ON
26
P41
ie)
MONO
Monaural
control
H:
Mono
27
|
P42
O
SPRLY
Control
OUTPUT
relay
H:
Relay
ON
28
P43
fo)
LTAPEA
|
Input
selector
LED
(TAPE
A)
Active
Low
29
PPO
oO
|
L
VIDEO/AUX
|
Input
selector
LED
(VIDEO/AUX)
Active
Low
30
x1
|
System
clock
oscillation
(crystal
4.194304
MHz)
31
X2
(0)
System
clock
oscillation
(crystal
4.194304
MHz)
Vss Power supply (GND)
No used
XT1, XT2
36
P50
0
L
TAPEB
Input
selector
LED
(TAPE
B)
Active
Low
36
|
PBI
|
0
LTUNER
|
Input
selector
LED
(TUNER)
Active
Low
37
P52
6)
L
PHONO
Input
selector
LED
(PHONO)
Active
Low
38
[
P53
oO
LCD
Input
selector
LED
(CD)
Active
Low
39
RESET
|
Reset
L:
RESET
40
~48
|
TO~T8
10)
9G~1G
Grid
control
49 T9 No used
50
PH3 10) T MUTE TUNER MUTE drive
PH2 ~ PHO
$11, $10
No used
4
Segment drive/key scan
Vioao Pull-down fro FL (—30 V)
Predriver for FL
VpRE
58 ~63 $9~S4 10) j~e Segment drive/key scan
+.
64 Voo Power supply (+5 V)
:
|

KRX-593/793
CIRCUIT DESCRIPTION
4-3. Timing chart
(1) POWER ON
i) KEY POWER ON KEY ON
4s
ii) REMOCON POWER ON
REM IN (9) |
7O0ms
(2) POWER OFF KEY ON
i) KEY POWER OFF tu
~o»—______—_
POWER (25) | 20m Sa
!
PLL DATA (14)
SEL. LED OFF Sa a a ee
ON
ii) REMOCON POWER OFF
REM IN (9) | so
7TOms
12

KRX-593/793
CIRCUIT DESCRIPTION
—~ 20ms
“———~ «When mode is selected
SEL.
LED
(36)
{
“TUNER”,
value
is
1
s.
t
1
|
ome
PLL OATA(14) |
|
1] |
SERIAL OUT (18) \ }
f i}
|
|
I
|
(4) PRESET CH. CALL |
I
i
i
PLL DATA (14) H | 4
'
| |
SERIAL OUT (18) H | |
(5) PRESET CH. SCAN
i) No station
MUTE (16) |
PLL DATA (14) | | |
ee
30ms 5Oms Is 30ms 50ms Is 30ms
4
SD DETECTION SD DETECTION
ii) Station “Don't detect SD signal in non-TUNER mode.
MUTE (16) Teese ee
PLL DATA (14) | | |
nn nt ne ee
30ms 500ms 5s 30ms 500ms Ss 30ms 500ms
4 4
SD DETECTION SD DETECTION SD DETECTION
(6) AUTO TUNING
MuTE (16) ——-J 1 800ms |
pie
DAT
ai
sence
lS
oo
=
Pe ggg a ge
30ms ‘ ps +t t 4 t: normal 128 ms
SD DETECTION | SD DETECTION Band edge 512 ms
SD DETECTION
(7) MANUAL TUNING
1. 500ms |
MUTE (16) : ‘
PLL DATA (14) ee Ns a) eh ae
+
, t: malt 128 ms
een,
toes
13
ee
Band
edge
512
ms
KEY OFF ane ee

KRX-593/793
CIRCUIT DESCRIPTION
DECK SECTION
5, DECK MICROPROCESSOR: »PD75112CW-149 (PCB-REC/PLAYBACK X28: IC901)
5-1. Terminal connection diagram
NOR/CrO2 @
VR CLK
DOLBY ON
[MUTE ©
* 1)
8
KEY
mn
LED
MATRIX
SYSTEM
CONTROL
RESET
CIRCUIT
RECORDING/
PLAYBACK UNIT
ELECTRIC
VOLUME
IC902
DOLBY RP @
LEpe LEVEL IN
DPSS IN@
x1@
C4 xX901
x2 ©

KRX-593/793
CIRCUIT
DESCRIPTION
5-2. Key matrix (*1)
PIN No. of (C901 @
poe KSI
KR1 ONEWAY
KR2 >
KR3 <
a
®
@
@
®
®
®
5-3. LED matrix (* 2)
PIN No. of IC 901
@
LED2
ONEWAY
@)
LED3
_
5-4. Initial Setting
When
the
power
cord
is
disconnected,
then
connected
again,
initial setting is entered.
Item Setting
DOLBY R/P PLAY
DOLBY ON/OFF OFF
RIP PLAY
AIB A
EQ SPEED NORMAL
REC MUTE ON
LINE MUTE ON
MUTE ON
BIAS OFF
NOR/CrO, NORMAL
NOR/CrO, ; NORMAL
SELECTOR TUNER
ELECTROMOTIVE VOLUME - 15 dB
15
|

KRX-593/793
5-5. Pin Function
CIRCUIT DESCRIPTION
Pin No. Pin name 1/0 Symbol Function
ils
. ; H : SW OFF
1 PI3/INT3 I KR4 Key return input L : SWON
4 ; H : SW OFF
2 P12/INT2 | KR3 Key return input L - SWON
T
P F H : SW OFF
3 PI1/INT1 | KR2 Kye return input L : SWON
. : : fous H : SW OFF
4 P10/INTO | KR1 Key return input (Mechanism switch input) L - SWON
5 PTHO3 | PHA Mechanism A rotation detection sensor input
PTHO2 I PHB Mechanism B rotation detection sensor input
= ; ‘ ‘ H_ : With tune
7 PTHO1 | DPSS IN Section-between-tunes signal input i: Siaoue tune
PTHOO | LEVEL IN Meter signal input
TIO I NC No use (GND)
10 TWH | NC No use {GND)
| P23 NC No use (GND)
12 P22/PCL M. VOL. UP Motor volume UP signal
M. VOL. DOWN | Motor volume DOWN signal
O;O;O]O
13 P21/PTO1
4
1 P20/PTOO NC No use (OPEN)
15 PO3/S! | KR8 Mechanism switch input (L: SW ON).
16 PO2/SO | KR7 Mechanism switch input (L: SW ON).
17 | KR6
Mechanism switch input (L: SW ON).
PO1/SCK
18 POO/INT4 | KR5 Mechanism switch input (L: SW ON).
H_ : OFF
19 P123 O | KS4 Key scan output LBeah
. ; H_ : OFF
20 P122 O | KS3 Mechanism switch output (key scan output) Ls Seah
1
H
:
OFF
21 P121 O |KS2 Key scan output i Sean
: : H : OFF
Mechanism switch output (key scan output) L = Scan
H_ : OFF
16) Key scan output ie ened
24 P132 O INC No use (OPEN)
25 P131 O | DOLBY RIP Dolby R/P selection Ree
L : REC
26 P130 O FNC No use (OPEN)
Oo |NC No use (OPEN)
H : ON
LED control L : OFF
H : ON
LED control L : OFF
H : ON
LED control L - OFF
NC No use
H : OFF
Vop Connected to +5 V L - ON
DECK/OTHER Deck mute control L : ON

KRX-593/793
CIRCUIT
DESCRIPTION
Function
Pin name Symbol
34
P32
VO
|
DATA
System
control
signal
!/O0
(DATA)
35
P31
vO
|
BUSY
System
control
signal
1/O
(BUSY)
36
P30
O
|
SELDA
Selector
IC
control
(A)
T
37.
|
P43
o
|
SELDB
Selector
IC
control
(B)
38
P42
oO
|NC
No
use
39
P41
0)
|
SELDC
Selector
IC
control
(C)
———=
;
H_
:
OFF
40
P40
O
|
LMUTE
|
Line
mute
control
L
-
ON
i
DOLBY
H
:
ON
4)
P53
|
0)
ON/OFF
DOLBY
ON/OFF
control
L
OFF
42
P52
O
|
VR
ST
Electronic
volume
strobe
signal
output
43
P51
O
|
VR
DATA
Electronic
volume
serial
data
output
+
44
P50
OQ
|
VRCLK
Electronic
volume
serial
clock
output
—
Peer
seed
.
H_:
Normal
RESET
|
RESET
Reset
input
L
+
Reset
46
X2
O
{-
Ceramic
OSC
connection
pin
f=4.19
MHz
47
X1
I
—
Ceramic
OSC
connection
pin
f=4.19
MHz
L
:
NORMAL
H
:
CrO2
H
:
NORMAL
:
CrO2
:
High
speed
:
Normal
O | NOR/CrOz NOR/CrOz2 selection
—_—
NOR/CrO2 NOR/CrOQz selection
P61
O
|
EQ
SPEED
Deck
B
EQ
control
ff}
51
P61
O
|
BR
MUTE
Deck
B
recording
mute
control
:
:
Ak
52
|
P73
O
|B
BIAS
Deck
B
bias
ON/OFF
H
a
No use (OPEN)
s
,
H
:
REC
54
P71
O
|
RIP
Deck
B
R/P
selection
-
PLAY
H:B
Playback
EQ
A/B
selection
Re
No used
57
P82
oO
|
SOLB
Deck
B
solenoid
control
Ble
aa
eOrn
ee
aang
:
Others
: ON
: OFF
: Normal speed
: High speed
58
P81
O
|
CPMB
Deck
B
capstan
motor
control
aie ie i reas
59
P80
O
|
CSPB
Deck
B
capstan
motor
speed
contro!
No used
af tS
;
H
:
ON
61
P92
O
|
SOLA
Deck
A
solenoid
control
L
:
OFF
|
H
:
ON
62
P91
O
|
CPMA
Deck
A
capstan
motor
control
:
:
L:
38
OFF
=f
4
;
;
H
:
Normal
spee
P
SPA
Deck
A
63
90
O
|
CSP.
eC
capstan
motor
speed
control
L
:
High
speed
Connected to GND
17

KRX-593/793
CIRCUIT DESCRIPTION
5-6. Timing chart
STOP TO RVS PLAY/REC(---) |
STOP TO FWD PLAY/REC(---)
UNIT as wit aS
1200 1400 Ree fol 200 400 600 600 1000 1200 1400
ee ee te KEY ry
1
IN
:
a
\ !
!
'
ai
4 an
1 sor |), ' i i
+
$7
Fy
es
;
-
— cen |62 Se
58 : at 4 : 4 ! 4
csp
{8
1
t
T j T
;
T
59 1, 4 ! 1 .
gical cad ices decane: Cae aamanas wkd ic R/P | sa fi : 4 ‘
see Vee -USsegtesseecebeecce cabeensecs 1 T
BIAS] 52 ‘
aL.
LM 40 '
i sail Sn
(ea RM 51 |! ' ‘ \ \
STOP TO FF STOP TO RWD ena
UNIT mS
aa 200 400 600 600 1000 1200 1400
1200 1400
Oo
7D
z
BG
|
3
nD x
rj PFiazlo
TiN @
>
yi ou
o
PLAY/REC (---) TO STOP UNIt as
1200 1400
18

KRX-593/793
CIRCUIT DESCRIPTION
STOP TO NOR SPEED DUBBING
STOP TO Hi SPEED DUBBING
UNIT aS
Prats 200 400 e600 600 1000 1200 1400
i= er
1200 1400
EET NE NONE TS
1 i
1 am 2
t
vy I
i)
| er t
‘ [
T
SOLA
a
i
|
i
'
4
=
=
+—
CPMA] 62 ' ' 1 ! 4 1
1 ~ Le 4 J
CSPA| & |! : \ ' i ; \ t
! 1 4 : rl
R/P | 54 ' i 1 ; 1 ©
t+ + +—— i
BIAS]
&
UU
! ‘
1
i
La
1
1
i
Es
Te
1 T coats i T T = :
“a
cn
aie
—
=
4
FWD PLAY TO CUE
UNI} mS
FWD PLAY TO REVEW
1200 1400
RVS PLAY TO REVEW
19

KRX-593/793
ADJUSTMENT
INPUT
OUTPUT
TUNER
ALIGNMENT
ITEM
SETTINGS
SETTINGS
SETTINGS
POINTS
ALIGN
FOR
FIG.
FM
SECTION
(PCB-TUNER)
SELECTOR:
FM
(A)
98. OMHz Connect a DC AUTO
DISCRIMINATOR
lkHz,+75kHz
dev
voltmeter
to
TPl.
or
MONO
L103
OVt20mV
60dBuCANT
input)
98.
OMHz
(C)
98. OMHz
DISTORTION
1kHz,
+68.
25kHz
dev
AUTO
T171
(STEREO)
Selector:L
or
R
(B)
98.
OMHZ
(FRONTEND
Minimum
distortion.
(L
or
R)
Pilot:+6.75kHz dev
60dBuCANT input)
(A) _-
32101)
Adjust R127 and stop
TUNING
LEVEL
98.
OMHz
AUTO
at
the
point
where
"TUNED"
Odev
or
MONO
display
of
2701(PCB-DISPLAY)
18dBuCANT
input)
98.
OMHz
goes
on.
AM
SECTION
(PCB-TUNER)
SELECTOR:
AM
(D)
530(531) kHz
Connect a DC
voltmeter between
TP2 and GND.
(B)
530(531)
kHz
L102
1.
2Vt50mV
(b)
SENSITIVITY
1000(999) kHz
(3) ) TUNING LEVEL
26dBuCANT input)
AUDIO SECTION (PCB-HAIN)
(D)
600(603) kHz
@)
600(603) kHz l L101 Waximum output
Adjust R126 and stop at the
point "TUNED" display of
Z701(PCB-DISPLAY) goes on.
(B) 1000(999)kHz
(FD
te Connect a DC voltmete
across R527(L)
R528(R)
€1>]
IDLE
CURRENT
volume:
0
501
(CL)
¥502(R)
Connection
<< Front
—M FRONT END
(F) DC voltmeter
Voltmetre de CC
Gleichspannungsmesser
R527 (Ll)
R528 (R) f ——_—_____—_/
20