Adjustment Procedures - Grundig freaxx 20 Service Manual

GRUNDIG Service

Adjustment Procedures

1. Cassette Deck
Measuring instruments/equipment: Frequency counter, AF voltmeter, wow and flutter meter, e.g. Fe test cassette 449.
Adjustment
1. Tape speed Connect the frequency counter to the headphone
socket.
Play test cassette 3150Hz (e.g. 449).
2. Wow and flutter Connect the wow and flutter meter to the headphone
socket. Play test cassette 3150Hz (e.g. 449).
3. Head gap angle Connect the AF-voltmeter to the headphone socket.
(Azimuth) Play test cassette 8kHz (e.g. 449).
4. Bias frequency Connect the frequency counter to connector CN207A
Pin 1 / Pin 4 (GND).
Insert a recordable cassette.
Function: Record-Start.
Preparations
2 - 3
Adjustment Process
With adjustment control (in the cassette motor) set the
±
frequency to 3150Hz 0.1%.
Deviation < 0.35% (aurally compensated). Playback
measuring time ≥ 30 seconds.
With the head adjustment screw 1 set the
left and right channel to maximum level.
The levels of the two channels must not
differ by more than 3dB.
±
Set the frequency to 62kHz 1kHz with L201.
FREAXX 20 RRCD 4202
Bandgeschw.
Tape speed
1