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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.
 ;
THIS MANUAL IS VERY GOOD AND VERY CLEAR
PLEASE NOTE IT DOES NOT CONTAIN THE SETUP INFORMATION TO ALIGHN THE GEARS IN THE CD MECH IT DOES SHOW ALL THE PARTS AND THEIR LOCATIONS .
PIF/AFT/AGC � DIGITAL COMB FILTER Y LEVEL ADJUSTMENT
3. AFT T204 DC voltage at TP201 [ Pin (1) of IC201] 1. DIGITAL COMB FILTER Y LEVEL ADJUSTMENT: R5467
6V this is not available, any signal above the level 1.0 Vp-p ± 0.05Vp-p).
Receive E-12CH (PAL signal. If 1. Input the PAL bar (100% white colour bar) signal to AV-IN terminal with a 75 ohm termination (input
E-5CH band is acceptable. 2. Connect the oscilloscope to TP5462 (pin (7) of connector YA). � Field strength: 55~80 dBµV 3. Adjust R5467 so that the Y signal (100% white) at TP5462 be 2.0 ± 0.1Vp-p. Make sure frequency is almost the same as 3.3V of received channel (± 30 kHz). Note: Make sure that the signal is linearly amplified overall. (The 100% portion should be kept intact.)
2. Using the channel setting control, make a fre-
quency of 224.25 MHz appear on screen. <Reference> Note voltage level for adjustment with the E-12CH signal. (AFT off)(If any other channel than E-12CH is To be adjusted to 2.0 Vp-p at TP5462 received, make its frequency on screen.) * Make sure above value is available after the adjustment No. 5. (See Page 12.)
DOWN A B' B B'' C UP
3. Turn T204 coil clockwise first to have 6V readInput (YB) (2): 2.0 V ± 0.1 Vp-p
ing and then counterclockwise to get 0.2 readOutput (YA) (7): 2.0 V ± 0.1 Vp-p Fig. 3 ing. * Turn core counterclockwise for UP diWithin range, adjust this coil to reach the volt-
� SOUND ADJUSTMENT
B' B''). Point A and C are rejectable.
rection, and clockwise for the DOWN direcage below. tion. Adjust the T204 core to point B (between 4. Adjust T204 so that DC voltage at the pin (1) of IC201 be 3.3 ± 0.2 V. (See Fig. 3.)
2
1. SUB SOUND ADJUSTMENT (I C bus adjustment)
0.04/-0.06 Vp-p 2. Set the volume control to MAX. 3. Connect VTVM probe to the S1 connector. (Pin 1: L-ch, 2: GND, pin 3: R-ch)
TV Set 4. Adjust sub-sound data so that VTVM should read following voltage. For the left channel. Fig. 4. Oscilloscope
4. RF AGC CUT-IN ADJUSTMENT: R226 1. Feed following signal to the AV terminal. Signal: 1 kHz, 1.76 Vp-p (terminated with a 10k ohm impedance),
1. Receive the E-12CH (PAL colour bar) signal.
� Field strength: 57 ± 1 dBµV (75 ohms open) Adjustment error: 8.0 ± 0.1 Vrms
2. Connect the oscilloscope to P201, as shown in
P201 Notes:
7
0.1V 3. Turn R226 to have the highest voltage.
� Bias box: About 6.5V
4. Turn R226 slowly in the opposite direction until
voltage goes down 0.1V below the highest level.
5. Adjust the signal level to 63-67 dBµV and make
Bias box 6. Now adjust the signal level to 90-95 dBµV and
� Spatializer off � In the S-Normal mode � S-VOL control at MAX position * Use an 8 ohm dummy load.
sure there are no noise.
2. NOISE MUTE CHECKING make sure there is no chrominance modulation +
1. Receive E-12CH "PAL colour bar" signal. 2. Turn up volume control to maximum and make sure sound is heard from speakers. Then put the unit in the no-signal state. 3. Be sure that the sound mute is effective.
beat.
Note: If a 50 ohm field strength meter is used with-
Fig. 4 4. Finally turn down the volume control minimum.
out a 50/75 impedance converter, set the field strength 55 ± 1dBµV. Pay attention to a loss that would be cause with the converter.
5. VIDEO DETECTION LEVEL ADJUSTMENT: R224
1. Receive "B/G SYSTEM PAL COLOUR BAR" signal (100% white colour bar). Set the S system to B/G. 2. Adjust R224 so that video output at the AV OUT terminal be 1.0 ± 0.05 Vp-p with a 75 ohm termination.
SX80J7
7-1 7-2
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