Cassette Deck - Grundig GDM5051 Serviceanleitung

CDM 900

2. Cassette Deck

Measuring instruments/equipment: Frequency counter, AF voltmeter, Wow and flutter meter, Fe test cassette 3150Hz/8000Hz (e.g. 449).
Adjustment
1. Tape speed Frequency counter to the AF output.
Insert test cassette, play 3150Hz.
2. Head gap angle AF voltmeter to the AF output.
(Azimuth) Unhook the cassette shaft carrier
Insert test cassette, close the cassette shaft
(leave the operating part open), play 8kHz.
3. Bias frequency Frequency counter to CN201 Pin 4 / Pin 2 (GND).
Insert a recordable cassette.
Function: Record-Start.
4. Bias level AF voltmeter to CN201 Pin 4 / Pin 2 (GND).
Insert a recordable cassette.
Function: Record-Start.
GRUNDIG Service
Preparation
N
.
1
N
IC201
Pin2 Pin4
CN201
Abgleichvorschriften / Adjustment Procedures
Adjustment Process
With adjustment control (in the cassette motor) set the
±
frequency to 3150Hz 0.1%.
Bandgeschwindigkeit
Tape Speed
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.
1
Set the frequency to 60kHz ± 0.5kHz with T201.
Adjust to 8V with SFR201.
rms
T201
CN202
SFR201
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