Troubleshooting
GV 900…, GV 940…
k
3 - 10
GRUNDIG Service
englisch • English • anglais
Troubleshooting Diagram 6 – Loading Motor and Cassette Ejection
Cassette is not ejected.
Does the capstan motor start when
pressing the button
N
?
See Troubleshooting Diagram 7
– Capstan Motor
Does the take-up reel turn when
the capstan motor is running?
Signal path between take-up reel
sensor D711 and IC701-(2)?
High level at IC702-(10)
when pressing button
N
?
Signal path between IC701-(92)
and IC702-(10)?
10V at IC702-(15)?
10V at loading motor?
Signal path between IC702-(12/15)
and loading motor?
Does the loading motor run?
Cassette cam, gear, etc.?
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
Loading motor?
YES
YES
NO
NO
STBY-CTL voltage High ?
IC 701 ?
Q9802, Q9803, AT12,6V ?
IC702?
12V at IC702-(13), R711?
Power supply M12V?
Is cassette compartment distorted?
YES
YES
YES
YES
YES
YES
NO
YES
NO
Troubleshooting Diagram 5 – Cassette Compartment Control
Tape is not taken in.
NO
NO
NO
Cover of tape start sensor?
NO
NO
STBY-CTL voltage High ?
IC 701 ?
Q9802, Q9803, AT12,6V ?
Signal path between tape start
sensor and IC701-(79), Q701?
Signal path between IC701-(92,93)
and IC702-(10,11)?
12V at IC702-(13), R711?
Power supply M12V?
IC702?
Signal path between IC702 -(12,15)
and loading motor?
Loading motor?
10V at loading motor
when the cassette is inserted
into the compartment?
10V at IC702-(12)
when the cassette is inserted
into the compartment?
High level at IC702-(10,11)
when the cassette is inserted
into the compartment?
High/Low change at IC701-(79)
when the cassette is inserted
into the compartment?
Does the tape start sensor cover go
to open when the cassette is
inserted into the compartment?
IC201 IC202 IC651 IC701 IC702 IC703 IC704 IC705 IC801 IC901 IC902 IC1601 IC1602 IC1701 IC1801 IC1901 IC1951 IC2501 IC5301 IC6301 RMC801 Tuner
S. / P.
4-26
4-26
4-25
4-22
4-21
4-22
4-22
4-22
4-21
4-28
4-28
4-33
4-29
4-36
4-22
4-35
4-35
4-24
4-31
4-24
4-21
4-30
