Adjustment Procedures - Grundig R 100 Service Anleitung

R 100 / CAR 200

Adjustment Procedures

GB
Test equipment:
Digital Voltmeter, Test Generator, AF Voltmeter, Stereo Coder, Frequency Counter, Test Cassette 448A (Partnumber 35079 023 000)
1. Main Board
Adjustment
1. MW Oscillator MW;
Digital Voltmeter to FMP603.
2. LW Oscillator LW;
Digital Voltmeter to FMP603.
3. MW Band Pass Test generator to Aerial Input. MW, m = 0.3, f
E´ = 20dBµV = 10µV.
AF-Voltmeter to Loudspeaker Output.
4. LW Band Pass Test generator to Aerial Input. LW, m = 0.3, f
E´ = 18dBµV = 7.9µV.
AF-Voltmeter to Loudspeaker Output.
5. AM IF Test generator to Aerial Input. MW, Frequency 1548kHz,
m = 0.3, f
AF-Voltmeter to Loudspeaker Output.
6. FM Oscillator FM, Frequency 93.00MHz.
Digital Voltmeter to FMP11.
7. FM Demodulator Test generator to Aerial Input. FM, Frequency 88.30MHz,
Preset deviation 22.5kHz, f
Digital Voltmeter to FMP201.
8. FM Band Pass Test generator to Aerial Input. FM, Frequency 88.30MHz,
deviation 22.5kHz, f
Digital Voltmeter to FMP201.
9. FM-IF Test generator to Aerial Input. FM, Frequency 88.30MHz,
deviation 22.5kHz, f
Digital Voltmeter to FMP201.
10. FM Demodulator Test generator to Aerial Input. FM, Frequency 88.30MHz,
deviation 22.5kHz, f
AF-Voltmeter to Loudspeaker Output.
11. Stereo Decoder Test generator with Stereo Coder to Aerial Input. Fre-
quency: 94.00MHz, E´: 70dBµV = 3mV, f
tion 22.5kHz, Pilot level 7.5kHz, SK dev. 3.5kHz, m = 0.6.
AF-Voltmeter to Loudspeaker Output left and right.
E´ = 45dBµV = 178µV.
2. Tape Drive
Adjustment
1. Azimuth Connect an AF-Voltmeter to Speaker Output right chan-
nel.
Play test cassette 448A (10kHz-part) in reverse direction.
2. Tape Speed Connect a Frequency Counter to Speaker Output right
channel.
Play Test Cassette 448A (3150Hz part).
GRUNDIG Service
Preparation
= 400Hz. E´ ≤ 20dBµV = 10µV.
mod
= 1kHz. E´ = 40dBµV = 100µV.
mod
= 1kHz. E´ = 40dBµV = 100µV.
mod
= 1kHz. E´ = 40dBµV = 100µV.
mod
= 1kHz. E´ = 20dBµV = 10µV.
mod
mod
Preparation
Align alternating with L 607 (1) at 531kHz for 1.1V
and with C 627 (2) at 1602kHz for 8.0V
At 153kHz align with L 608 (5) for 1.3V
Check at 279kHz for 4.8 - 6.5V.
= 400Hz, Align alternating with L 603 (3) at 558kHz and with C 609 (4)
mod
at 1548kHz for AF maximum.
= 400Hz, Align alternating with L 604 (7) at 162kHz and with C 611 (8)
mod
at 261kHz for AF maximum.
Align with F 601 (9) for AF maximum.
Align with L 04 (A) for 2.8V
Align F 106 for mechanical center at which the voltage is
> 1V.
Align L 03 (B) and L 01 (C) for a maximum.
Align F 101 (D) for a maximum.
Align F 106 for AF maximum.
Set R 127 (F) to full clockwise position.
= 1kHz, devia- Modulate the left channel an set R 204 (G) for maximum
Crosstalk Attenuation at the right channel.
Now modulate the right channel and look for the crosstalk
attenuation at the left channel. If the difference is > 3dB, set
R 204 for equal attenuation.
Set R 127 (F) for a channel seperation of 12dB.
Adjust with screw
level.
Control:
Difference left-right channel: ≤ 3dB.
Adjust with motorpoti for 3150Hz.
Abgleichvorschriften / Adjustment Procedures
Adjustment Procedure
±
50mV.
±
50mV.
±
50mV.
Adjustment Procedure
A
for maximum
A
±
50mV
Motorpoti
5