Adjustment Procedures; Cassette Deck - Grundig RR 670 CD Serviceanleitung

Abgleichvorschriften / Adjustment Procedures

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.
Insert e.g. test cassette 449, play 3150Hz.
2. Wow and flutter Connect the wow and flutter meter to the headphone
socket. Insert e.g. test cassette 449, play 3150Hz.
3. Head gap angle Connect the AF-voltmeter to the headphone socket.
(Azimuth) Insert e.g. test cassette 449,
play 8kHz.
4. Bias frequency Connect the frequency counter to connector CN403A
Pin 2 / Pin 4 (GND).
Insert a recordable cassette.
Function: Record-Start.
2 - 3
Preparations 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 63kHz 1kHz with L401.
RR 640 CD / RR 670 CD
Bandgeschw.
Tape speed
1
PIN 2
PIN 4
GRUNDIG Service