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Very helpful and complete manual. Maybe only one negative is schematics have sometimes unreadable name of the parts. But it's not a big problem.
 ;
Excellent high quality schematics brought my old Heidelberg back to life. Fast download at a reasonable price. Thanks.
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This document is just what I was looking for, it´s very useful, it contains adjustment procedures for the final stage of the power amp and also
has a complete wiring diagram and description of the main semiconductors used in the design.
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Dear Sirs,
Thank you for the fast support, the manual does provide all necessary information to repair the radio. All schematics are in a good quality for reading.
The manual fits 100% to my requirements as a technican.
Kind regards Thomas
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the big video recorder format s-vhs many features delicate in loading system of the cassette. Such machines are no longer manufactured, it would be too expensive.
SECTION 4 ELECTRICAL ADJUSTMENTS
BASE UNIT SECTION
Note: � Apply 9V dc from regurated DC power supply. � Perform the adjustment at T3CH (28CH : 49.910 MHz) as a rule. � Set to base unit manual test mode. (Refer to page 7.) � Switch position : S302 (DIAL MODE) : P (pulse) TX SECTION ADJUSTMENT � The electrolytic capacitor (10 µF/10 V) connected TP23 (DET OUT) to TP19 (GND). (Only TX section adjustment) TX VT Adjustment Setting :
TP2 TP3 (RX GND) Carrier frequency : 49.910 MHz Modulation Deviation Output level : 1 kHz : FM 3 kHz : 60 dBµV (1 mV) (EMF)
RX SECTION ADJUSTMENT RX LEVEL Adjustment Note: � Perform the adjustment at T3CH (28CH : 49.910 MHz) as a rule. Setting :
FM RF signal generator
digital voltmeter
level meter
+ �
TP6 (TX VT) TP19 (GND)
+ �
Procedure : 1. The digital voltmeter connected TP6 (TX VT) to TP19 (GND). 2. Adjust the L52 for 2.2 ± 0.05 V reading on the digital voltmeter. RX VT Adjustment Setting :
digital voltmeter
TP105 TP104 600 �
PBX tester or DC 48V F.B.
+ �
TP5 (RX VT) TP3 (RX GND)
Procedure : 1. Adjust the FL101 for the maximam reading on the level meter. Also check that the output level is the specified values. Specified Value : �1.4 to �9.6 dBV RSSI Hi Adjustment Note: � Perform the adjustment at T3CH (28CH : 49.910 MHz) as a rule. Setting :
AF oscillator FM RF signal generator
Procedure : 1. The digital voltmeter connected TP5 (RX VT) to TP3 (RX GND). 2. Adjust the L101 for 2.4 ± 0.05 V reading on the digital voltmeter.
Output: 20 Hz
TP2 TP3 (RX GND) Carrier frequency : 49.910 MHz Modulation : 20 Hz (EXT) Deviation : AM 50% Output level : 17 dBµV (7.1 µV) (EMF)
oscilloscope (DC range)
+ �
TP9 (SIG OUT) TP19 (GND)
Procedure : 1. Use the oscilloscope to confirm the FM RF signal generator input (AF) signal waveform and RSSI signal, and use the RV101 so that they are synchronized (duty is synchronized).
RSSI output waveform 0V Adjust so that they synchronize at 0 V. RSSI WAVEFORM AF oscillator EXT signal 20 Hz
Adjustment Location : base main board (See page 13.)
12
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