Abgleichvorschriften / Adjustment Procedures
M 7-C / M 17-C / M 27-C
2 - 4
GRUNDIG Service
2. Tape Decks
Measuring instruments/Test equipment:
AF voltmeter, Frequency counter, AF generator, test cassette 448A Part No.: 35079-023.00
Alignment
Preparation
Procedure
1. Azimuth
2. Speed
3. Playback level
4. Bias
5. Record level
normal
reverse
With the corresponding adjustment screws set the left and
right channel to maximum.
With 3682 set to 5670Hz
±
0.5%.
With 3684 set to 3150Hz
±
0.5%.
Tape 1:
With 3635 (L) set 675mV
±
0.5dB
With 3636 (R) set 675mV
±
0.5dB
Tape 2:
With 3641 (L) set 675mV
±
0.5dB
With 3642 (R) set 675mV
±
0.5dB
With 5773 and 3785 set alternating to 110mV
±
5mV in
both channels
With generator output set to 170mV
With 3655 (R) resp. 3656 (L) set 5mV
±
0.5dB
Remove the cassette lid cover (disassembly instructions
para 5). The adjustment screws can now be set through the
holes in the cassette lid.
Tape
Playback the test cassette 448A sound part 10kHz.
AF voltmeter to
10
resp.
11
Tape, Cr
Put empty cassette in tape 2
Playback the test cassette 448A in tape 1, sound part
3150Hz
Frequency counter to
10
resp.
11
High Speed Dubbing
Normal Speed Dubbing
Tape, DOLBY NR off, Cr
Playback the test cassette 448A sound part 315Hz
AF voltmeter to
10
(L) and
11
(R)
Tape 2, Record, test cassette 448A side B
AF voltmeter between Pin 1 and 2
13
resp. Pin 3 and
4
12
of 1711
Tape2 ; DOLBY off, test cassette 448A side B
Short circuit
16
to GND
Connect AF generator 330Hz to AUX inputs
AF voltmeter to
14
resp.
15
AF voltmeter between Pin 1 and 2
13
(R) resp. Pin 3 and
4
12
(L) of 1711
etf2-p2-951114-1
3139 113 33192
1
1
1
11
3682
8
1741
1742
3684
1703
9
1704
11
1
1
7
4
5701
1720
3773
1706
3785
1711
1730
5632
5631
1701
3641
3635
3636
3656
3642
3655
2695
2696
1705
10
11
13
12
14
15
16