Grundig Sonoclock 51 Technical manual

Sonoclock 51 SC 5301
Service Document
Exchange Set
Es gelten die Vorschriften und Sicherheitshinweise
gemäßdemServiceManual"Sicherheit",Material-
nummer720108000000,sowiezusätzlichdieeven-
tuell abweichenden, landesspezifischen Vorschrif-
ten!
The regulations and safety instructions shall be
valid as provided by the "Safety" Service Manual,
part number 720108000000, as well as the
respective national deviations.
S
Dieses Service Dokument ist nur in Datenform verfügbar
This Service Document is only available as data
Änderungen vorbehalten/Subject to alteration
Made by GRUNDIG in Germany • H-S43 0303
http://www.grundig.com
S
Service
Manual
Sicherheit
Safety
Materialnr./Part No.
720108000000
ǵ

Sonoclock 51 SC 5301
ǵ

Sonoclock 51 SC 5301
ǵ

Sonoclock 51 SC 5301
ǵ

Sonoclock 51 SC 5301
ǵ

Sonoclock 51 SC 5301
ǵ

Sonoclock 51 SC 5301
ǵ

Sonoclock 51 SC 5301
ǵ
EQUIPMENT REQUIRED
Signal Source
1.MW/LW signal generator (AM SG)
2. FM signal generator (FM SG)
3. Sweep generator (10.7 M z for FM)
Output Indicator
1. SSVM
2. Oscilloscope
3. Frequency Counter
General preparation
1. C eck source voltage.
2. Set function switc to band being aligned
3. Turn volume control to minimum (unless noted ot erwise)
4. Connect low side of signal and output indicator to c assis ground unless ot erwise specified.
Keep ground connection close to ig side connection.
5. Keep signal inout as low as possible to avoid AGC and AFC action
(set output indicator to ig sensitivity.)
6. Standard modulation is 1000 Hz AT 30% amplitude for MW/LW (1000 Hz at 22.5 kHz deviation for FM)
AM IF ALIGNMENT
Step Signal source (AM RF Gen) Connect
to Set signal to Aligment indicator connect to Oscilloscope or SSVM Set radio dial to Adjust Adjust for Remarks
1 A standard radiation loop 460 KHz T4 Detector Output Terminal Quiet point T3 Maximum Volume control min
position
2 Repeat for maximum output
MW RF ALIGNMENT
Signal source (AM Signal Gen.)
connect to Set signal to Alignment indicator Connect to Set radio dial to Adjust Adjust for Remarks
1515 KHz
(modulated) 515 KHz (lowest end) T1 (Osc, coil)
21640 KHz
(modulated) 1640 KHz (Hig est end) TC4 (Osc, trim)
3600 KHz
(modulated) 600 KHz L2 (ant coil)
41440 KHz
(modulated) 1440KHz TC3 (ant trim)
5 Repeat Steps 3 and 4 as necessary to minimize tracking error. Also repeat steps 1 and 2 if necessary.
LW RF ALIGNMENT
Signal source (AM Signal Gen.)
connect to
Set signal to Alignment indicator Connect to Set radio dial to Adjust Adjust for Remarks
1140 KHz
(modulated)
140 KHz
(lowest end)
T2 (Osc,
coil)
2290 KHz
(modulated) 290 KHz (Hig est end) TC6 (Osc, trim)
3153 KHz
(modulated) 153 KHz L3(ant coil)
4261 KHz
(modulated)
261 KHz TC5 (ant trim)
5 Repeat Steps 3 and 4 as necessary to minimize tracking error. Also repeat steps 1 and 2 if necessary.
FM RF ALIGNMENT
Step Signal source (FM Signal Gen.)
Connect to
Set signal to Alignment indicator (oscilloscope ,
VTVM Connect to
Set radio dial to Adjust Adjust for Remarks
187.35 MHz
modulated
87.35MHz
(lowest end)
L1 (Osc, coil)
2108.25 MHz
modulated
108.25MHz
(Hig est end)
TC2
(Osc, trimmer)
390 MHz
modulated 90MHz L2
(
RF coil
)
stretc or
squeeze
4106 MHz
modulated
106MHz TC1 (RF trim)
5 repeat steps 3 and 4 as necessary to minimum tracking error. Also repeat steps 1 and 2 if necessary.
* UK models must not be able to tune below 87.5 MHz.
Across speaker voice coil Maximum Volume control max-
position
TP 1, GND (Test point) t roug
matc ing network if necessary Across speaker voice coil Maximum Volume control Max- position
A standard radiation loop antenna
ALIGNMENT PROCEDURE
MODEL NO. GRUNDIG SONOCLOCK SC 51
A standard radiation loop antenna Across speaker voice coil Maximum Volume control max-
position

Sonoclock 51 SC 5301
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