Grundig GV 900 SV/1 Manuel De Service page 42

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