VIDEO
SERVICE MANUAL
D Btx *32700 #
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Service |
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Manual |
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Manual |
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GV 709 M |
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Additionally required |
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Safety |
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Service Manuals for |
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GV 729 M |
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the Complete Service: |
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Part No. |
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Part No. |
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72010-527.55 |
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72010-800.00 |
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GV 709 M GV 729 M
GV 709 M |
(758636-1000 / G.MF 6600) |
GV 729 M |
(758637-1000 / G.MF 6700) |
NTSC
PAL /ME/SECAM
Remote Control
Subject to alteration |
Printed in Germany |
Service Manual Part No. 72010-527.55 |
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VK 21/1 |
0896 |
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General |
GV 709 M, GV 729 M |
The regulations and safety instructions shall be valid as provided by the "Safety" Service Manual, part number 72010-800.00, as well as the respective national deviations.
GB Table of Contents
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Page |
General ................................................ |
1-1…1-10 |
Test Equipment / Aids ...................................................... |
1-2 |
Specification ..................................................................... |
1-2 |
Disassembly ..................................................................... |
1-3 |
Mechanism Adjustment ..................... |
2-1…2-16 |
Electrical Adjustment .......................... |
3-1…3-3 |
Layout of PCB |
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and Circuit Diagrams ......................... |
4-1…4-36 |
Schematic Diagram Notes ............................................... |
4-1 |
Circuit Board Notes .......................................................... |
4-2 |
Board Interconnections .................................................... |
4-3 |
SYSTEM CONTROL Block Diagram ............................... |
4-5 |
Video Block Diagram ....................................................... |
4-7 |
Video Schematic Diagram ............................................... |
4-9 |
System Control Schematic Diagram .............................. |
4-11 |
Switching Regulator Schematic Diagram ....................... |
4-13 |
Tuner Schematic Diagram ............................................. |
4-15 |
Servo Schematic Diagram ............................................. |
4-17 |
Front Schematic Diagram .............................................. |
4-19 |
On Screen Schematic Diagram ..................................... |
4-21 |
Waveforms ..................................................................... |
4-23 |
Main Circuit Board ......................................................... |
4-25 |
FDP Grid Assignment and Anode Connection ............... |
4-27 |
Remote Control Schematic Diagram ............................. |
4-28 |
General
Test Equipment / Aids
Variable isolating transformer |
Colour generator |
Dual channel oscilloscope |
AF Generator |
Digital multimeter |
Stabilized power supply |
Millivoltmeter |
Frequency counter |
Please note the Grundig Catalog "Test and Measuring Equipment" obtainable from:
Grundig electronics GmbH
Würzburger Str. 150
D-90766 Fürth/Bay.
Tel. 0911/703-0
Telefax 0911/703-4479
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Part no. |
Presetting unit ................................................. |
75981-311.26 |
Test cassette ................................................... |
75981-311.27 |
Back tension cassette gauge .......................... |
75981-311.33 |
A/C head positioning tool ................................ |
75981-311.34 |
Roller driver ..................................................... |
75981-311.35 |
You can order this test equipment from the Service organization. We refer to you that this test equipment is already obtainable on the market.
Exploded Views..................................... |
5-1…5-2 |
Technical Information ........................... |
6-1…6-1 |
Spare Parts List ..................................... |
7-1…7-1 |
Specification
VHS-System |
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1/ ” video cassette recorder |
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2 |
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Tape speed ................................. |
2.339cm/s (Standard play) |
Head to tape speed ......................... |
4.84m/s (Standard play) |
TV standard (GV 709 M) |
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CCIR, B/G, DK - PAL |
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TV standard (GV 729 M) |
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CCIR, DK, I - PAL |
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Record and playback of tapes with norm
PAL
MESECAM / NTSC (3,58) via A/V socket
Sound |
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Input via cinch socket ............ |
-8dBs, 50kΩ (0dB = 0.775Vrms) |
Output via cinch socket ........... |
-6dBs, 1kΩ (0dB = 0.775Vrms) |
Video |
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Signal / noise ratio ..................... |
approx. 43dB (unweighted) |
Video resolution .............................................. |
approx. 3MHz |
Input via cinch socket .................................... |
0.5…2Vpp, 75Ω |
Output via cinch socket .......................................... |
1Vpp, 75Ω |
Mains voltage .............................................. |
110V~…240V~ |
Mains frequency ................................................... |
50 / 60Hz |
Power consumption ........................................ |
approx. 17W |
Ambient temperature ................................... |
+5°C … +40°C |
Operating position ............................................... |
horizontal |
1 - 2 |
GRUNDIG Service |
GV 709 M, GV 729 M |
Disassembly |
GRUNDIG Service |
1 - 3 |
Disassembly |
GV 709 M, GV 729 M |
1 - 4 |
GRUNDIG Service |
GV 709 M, GV 729 M |
Disassembly |
GRUNDIG Service |
1 - 5 |
Disassembly |
GV 709 M, GV 729 M |
1 - 6 |
GRUNDIG Service |
GV 709 M, GV 729 M |
Disassembly |
GRUNDIG Service |
1 - 7 |
Disassembly |
GV 709 M, GV 729 M |
1 - 8 |
GRUNDIG Service |
GV 709 M, GV 729 M |
Disassembly |
GRUNDIG Service |
1 - 9 |
Mechanism Adjustment |
GV 709 M, GV 729 M |
2 - 1 |
GRUNDIG Service |
GV 709 M, GV 729 M |
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Mechanism Adjustment |
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2.1.4 Test equipment |
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Presetting unit |
Alignment tape |
Torque gauge |
Grease |
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75981-311.26 |
75981-311.27 |
75981-311.32 |
75988-034.74 |
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Back tension cassette gauge |
A/C head positioning tool |
Roller driver |
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75981-311.33 |
75981-311.34 |
75981-311.35 |
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GRUNDIG Service |
2 - 2 |
Mechanism Adjustment |
GV 709 M, GV 729 M |
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Category |
Part No. |
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Oil |
75981-311.30 |
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Grease |
75988-034.74 |
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2 - 3 |
GRUNDIG Service |
GV 709 M, GV 729 M |
Mechanism Adjustment |
GRUNDIG Service |
2 - 4 |
Mechanism Adjustment |
GV 709 M, GV 729 M |
2 - 5 |
GRUNDIG Service |
GV 709 M, GV 729 M |
Mechanism Adjustment |
GRUNDIG Service |
2 - 6 |
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