Drive Mechanism - Grundig GV 900 SV/1 Manuel De Service

GV 900..., GV 940...

Drive Mechanism

The drive mechanism is fitted with three motors providing:
– precision drive of the headwheel
– direct drive of the capstan and the reels
– drive of the cassette compartment and tape threading/unthreading
system
Its special features are:
– Quick start
– Short winding/rewinding time
– Automatic cleaning of the heads with a cleaning roller
The specified position numbers (Pos. ...) are also used in the exploded
views.
1. Test Equipment / Jigs
Variable isolating transformer
Dual-channel oscilloscope with 10:1 test probes
Please note the Grundig catalogue "Test and Measuring Equipment"
obtainable from:
Grundig AG, Geschäftsbereich Instruments
Test- und Meßsysteme
Würzburger Str. 150, D-90766 Fürth
Tel.: 0911 / 703-4118, Fax: 0911 / 703-4130
eMail: instruments@grundig.de
Internet: http://www.grundig-instruments.de
Nylon gloves ...................................................... commonly available
Slide gauge ........................................................ commonly available
Test cassette (HiFi) ....................... 92754 010 1600
Torque cassette meter ................... 75988 047 1200
Torque meter 600gf-cm .......................... 75981 311 3200
X-value adjustment screwdriver ..... 75988 047 1100
Tension gauge .......................... commonly available
Screwdriver (slotted) ................. commonly available
Torque screwdriver ................... commonly available
Hexagon box wrench 5.5mm .... commonly available
GRUNDIG Service
2. Overview of the Drive Mechanism
Top side of the mechanism (cassette compartment removed)
63
58
7
24
15
Fig. 1
7 Threading roller unit, l
8 Threading roller unit, r
11 Pinch roller drive lever
12 Pinch roller
15 Lever
Part Number
19 Tape reverse guide lever
24 Supply main brake
25 Take-up main brake
35 Reel
Bottom side of the mechanism
61
34
21
37
38
Fig. 2
21 Slow brake
23 Clutch lever
27 Slider
34 Reel belt
62 8 59
35 46 35
38 Cassette compartment drive
gear
41 Pinch roller cam wheel
46 Idler wheel
58 Full erase head
59 A/C head
60 Loading motor
62 Headwheel motor
63 Tape drum
23 48
37 Master cam
38 Cassette compartment drive
gear
48 Limiter pulley
61 Capstan motor
Drive Mechanism
12
41
19
11
38
25
60
27
5 - 9