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Technics ST-CH505

Technics ST-CH505
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Service
Manu
~~
Tuner/Sound
Processor
SL-CH505
Remote
Control
Transmitter,
\
SB-CH404
RS-CH404
SE-CH404
Because
of
unique
interconnecting
cables,
when
a
component
requires
service,
send
or
bring
in
the
entire
system.
M
Specifications
@
Pre-amplifier
section
Input
sensitivity/impedance
PHONO
for
(E)
(EG)
areas
2.5
mV/47
kQ
AUX
for
(GN)
area
250
mV/15
kQ
DCC
250
mV/15
kQ
Output
level
DCC
RECOUT
150
mV/1.5
kQ
Frequency
response
PHONO
for
(E)
(EG)
areas
30
Hz—15
kHz/+1.5
to
-2.0
dB
AUX
for
(GN)
area
30
Hz—20
kHz
DCC
30
Hz—20
kHz
m@
EQ,
SFP
section
Center
frequency
80,
250,
1
k,
4k,
12.5
k(Hz)
Fixed
mode
SPACE
3
modes
(DISCO,
LIVE,
HALL)
GEQ
5
modes
(HEAVY,
CLEAR,
SOFT,
CAR,
HP
ST)
@
FMtuner
section
Frequency
range
87.50—108.00
MHz
(0.05
MHz
steps)
Sensitivity
1.8
pV
(IHF
usable)
S/N
26
dB
1.5
pV
(750)
S/N
MONO
70
dB
(75
dB,
IHF)
Stereo
separation
1
kHz
35
dB
Antenna
terminal(s)
75Q
(unbalance)
SC-CH404
ST-CH505
SL-CH505
‘Technics
ST-CH505
SB-CH404
Compact
disc
player
Amplifier
Cassette
deck
SE-CH404
RS-CH404
ORDER
NO.
AD9307219C8"
al
Tuner
ST-CH505
Colour
(K)
....
Black
Type
Areas
Suffix
for
Model
No.
(E)
(EG)
Germany
and
Italy
System:
SC-CH404
Colour
Europe
@
AM
tuner
section
Frequency
range
522—1611
kHz(9
KHz
step)
530-1620
kHz
(10
KHz
step)
LW
144-288
kHz
(9
KHz
step)
Sensitivity
(S/N
20
dB)
MW
500
pV/m
LW
50
pV
Hi
Timer
section
Clock
Quartz-lock
type
Function
24-hour
programmable;
Play
timer
(1
time),
Rec
tiner
(1
time),
Sleep
(120
min,
1
min
intervals)
Setting
1
minute—23
hours
59
minutes
:
(1
mn,
intervals)
@
General
Dimensions
(WxHxD)
270X8&9
x
274
mm
Weight
1.75
kg
Notes:
1.
Weights
and
dimensions
shown
are
approximate.
2.
Design
and
specifications
are
subject
tochange
without
notice.
SB-CH4i4
“(E)
(EG
areas
“(GN)
asa
*Macie
in
PAES
“Wade
in
NABEL
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Technics ST-CH505 Specifications

General IconGeneral
FM Tuning Range87.5 - 108 MHz
Signal to Noise Ratio (AM)50 dB
Total Harmonic Distortion (FM)0.3%
Presets30
Output Level500 mV
Weight2.3 kg
Tuner TypeDigital Tuner
AM Sensitivity20 uV
Signal to Noise Ratio (FM)70 dB
Frequency Response (FM)30 Hz - 15 kHz
Stereo Separation (FM)40 dB

Summary

System Specifications

Pre-amplifier Section

Input sensitivity, impedance, output level, and frequency response details.

AM Tuner Section

Frequency range and sensitivity for AM broadcast bands.

FM Tuner Section

Frequency range, sensitivity, S/N ratio, and stereo separation.

Timer and General Information

Timer settings, clock function, device dimensions, weight, and operational notes.

Unit Control Locations

Time Setting Procedure

Service: Disassembly and Checking

Component Removal Procedures

Steps for removing the cabinet, front panel, PCBs, and connectors from the unit.

Main PCB Inspection

Procedure for inspecting the main printed circuit board after disassembly.

Maintenance and Power Supply

Foot Component Replacement

Instructions for replacing the foot of the device.

PCB Power Supply Procedures

Steps for applying power to the main and tuner printed circuit boards.

Circuit Schematics

Tuner Circuit Diagram

Detailed schematic illustrating the tuner's electronic circuitry.

Operation Circuit Diagram

Detailed schematic illustrating the operation circuit's electronic components.

Main and Connection Circuit Diagrams

Schematics for the main board and connection PCBs.

Wiring Diagram

System Block Diagram

Integrated Circuit Terminal Functions

Spare Parts List

Cabinet Assembly Breakdown

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