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GRUNDIG GV 5000GB
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of GRUNDIG GV 5000GB Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 26 (click to view)
Abgleich / Adjustment Procedures

GV 5000 �, GV 5300 �

2.2 Family Board � Frontend (FV)
Test equipment: Oscilloscope with 10:1 Test Probe, Voltmeter, Colour Generator Service work after replacing the Tuner: Adjustments no. 2 Adjustment 1. Vision Demodulator Circuit, F5770 2. Delayed AGC Voltage, R3770 Preparation Feed in 38.9MHz / 100mVPP into the tuner output 1701-(17). Voltmeter: ..................................................... IC7772-(10) EE-mode. Feed in a PAL white test pattern with sound carrier (without sound modulation, UHF-range, Ch24, 67dBµV aerial signal) into the warmed-up VCR. Oscilloscope: ......................................... Tuner 1701-(17) EE-mode. Adjustment Procedure Set the voltage with F5770 (AFC) to 2.5V ±0.2V.

Set the amplitude with R3770 (AGC) to 550mVPP +0/-50mV.

2.3 Family Board � Video/Chroma (VS)
Test equipment: Oscilloscope with 10:1 Test Probe, Frequency Counter, Colour Generator Service work after replacing the Family Board: � Adjustment 1. Frequency Deviation Sync Value, R3054 2. Chroma Writing Current, R3038 Preparation AV recording (do not feed in an signal). Frequency counter: ............................................ 1911-(2) Connect IC7051-(2) to +5V. Oscilloscope: ...................................................... 1911-(2) Feed in a PAL red raster test pattern with 75% saturation (ratio burst: chroma = 1 : 2.2). AV recording. Adjustment Procedure Set frequency counter with R3054 (Sync. Frequ.) to 3.8MHz

±10kHz.
Set Chroma signal with R3038 (CHROMINANCE WRITING CURRENT PAL) to 71mVPP (-12.5dB of the FM-signal). Disconnect IC7051-(2) from +5V.

2.4 Family Board � Standard Sound / Audio Linear (AL)
Test equipment / aids: AF Millivoltmeter, AF Generator, Video Cassette of reputable brand. Service work after replacing the Family Board or the RP-Head: Adjustment no. 1.1, 2 Adjustment 1. Erase Frequency 70kHz, F5603 1.1 Bias (70kHz), R3618 1.2 Frequency Response Test Preparation Frequency counter: ............................................. 1918-(7) Record AF millivoltmeter: ................................................... R3600 Record. � Connect IC7601-(10) via 270� resistor to ground. � Feed in a CCVS signal via EURO-AV socket, contact 20. � Feed an audio signal of 200mVrms (480mVPP) from the AF generator to the EURO-AV socket, contact 2 or 6. � Make a recording of 400Hz and 8kHz each of 1 min at least. Afterwards play back these recordings. � Connect an AF millivoltmeter (oscilloscope) to EURO-AV socket, contact 1 or 3. AF generator (1kHz / 0.7Vrms): ..................................... EURO-AV socket, contact 2 or 6 AF millivoltmeter: ......... EURO-AV socket, contact 1 or 3 Record (Normal Play). Play back this recording. Adjustment Procedure With F5603 (BIAS Frequ.) set the reading on the frequency counter to 70kHz ±10kHz. Set the voltage drop across R3600 with R3618 15mVrms. Check the frequency response.
(BIAS)

to

The voltage ratio of 400Hz to 8kHz must not be higher than 1:0.7 or 0.7:1 (±3dB). If the voltage ratio exceeds these limits, the bias must be altered: To increase the playback voltage at 8kHz: Reduce "BIAS". To reduce the playback voltage at 8kHz: Increase "BIAS". Remove the 270� resistor between IC7601-(10) and ground. Set output voltage with R3606 (PB-Lev.) to 0.5Vrms ±50mV.

2. Playback Level, R3606

3. Keyboard Control Unit (ODCG1)
Test equipment: Frequency Counter Service work after replacing the Keyboard Control Unit: �

Adjustment 1. Clock, C2005

Preparation Disconnect from the mains. IC7101: ....... Connect Pins 67 and 68 with Pin 33 (+5V). Frequency Counter: ............................................ 1101-(1) Reconnect to the mains.

Adjustment Procedure The period is set with C2005 (CLOCK ADJ.) to 488.281,25ns ±0,715ns by the manufacturer. Disconnect IC7101-(67), -(68) from +5V (Pin 33).

3-4

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