GRUNDIG Service
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k
GV 900…, GV 940…
Troubleshooting
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NO
NO
YES
Troubleshooting Diagram 14 – Video/Chroma Recording (E-to-E mode is ok)
Video Record Error
(E-to-E mode is ok).
Luminance signal
(ca. 0.5Vpp) at IC201-(19)?
C206, IC201?
Luminance signal
(ca. 0.3Vpp) at IC201-(42)?
Signal path between Pin 21 and
Pin 42 of IC201? C208, IC201?
NO
YES
YES
YES
YES
Luminance signal
(ca. 0.5Vpp) at IC201-(26)?
Signal path between Pin 39 and
Pin 26 of IC201? C212?
NO
Luminance signal
(ca. 0.5Vpp) at IC201-(23)?
Signal path between Pin 24 and
Pin 23 of IC201? C210, IC201?
NO
Luminance signal
(ca. 0.5Vpp) at IC201-(13, 14)?
Peripheral circuit of
IC201-(13, 14, 16), IC201?
5V at IC201-(36)?
Clock at IC201-(69, 44)
0.5Vpp / 8.86MHz
(for CCD delay line)
NO
NO
YES
YES
YES
5V at IC201-(61)?
Power supply PC5V?
Chroma signal
(burst: 150mVpp)
at IC201-(60, 46)?
C512, IC201?
NO
Chroma signal
(burst: 200mVpp) at IC201-(58)?
4.43MHz oscillation at
IC201-(73/75)?
X501?
4.43MHz oscillation at
IC201-(73/75)?
X501?
Signal path between Pin 35 and
Pin 58 of IC201?
Chroma signal
(burst: 200mVss)
at IC201-(35)?
YES
Clock at IC201-(69, 44)
0.5Vpp / 8.86MHz
(for CCD delay line)
YES
5V at IC201-(36)?
NO
PAL Chroma Record Error
(E-to-E mode is ok).
NO
YES
YES
YES
YES
YES
SECAM record mode
activated?
NO
NO
CCVS signal at IC5301-(24)?
CCVS signal muted via
Q5303-(1) / High level at
Q5303-(5)?
Chroma signal at IC5301-(12)?
Chroma signal at Q5301-(E)?
Are the following signals
applied to the pins of IC5301?
Pin 4: 4.286MHz
Pin 6: EE_(L)
Pin 7: SECAM_(H)
Pin 9: C_SYNC
Pin 10: FV_PULSE
Q210?
Peripheral circuit of IC5301?
5V (PC5V) at IC5301-(5, 17)?
IC5301?
NO
Base bias at Q5301?
Q5304?
IC201?
YES
Head drum ass'y?
Signal path between Q5301
and IC201-(78)?
NO
5V (PC5V) at IC201-(90)?
SECAM Chroma Record Error
(PAL Chroma Record Mode is ok).
Chroma signal at IC201-(78)?
SP mode:
FM packages (1.5Vpp) at IC201-(86/87, 89/88)?
SP mode:
Chroma signal superimposed on FM packages (1.5Vpp) at IC201-(86/87, 89/88)?
LP mode:
FM packages (1.5Vpp) at IC201-(91/92, 94/93)?
LP mode:
Chroma signal superimposed on FM packages (1.5Vpp) at IC201-(91/92, 94/93)?
IC201 IC202 IC651 IC701 IC702 IC703 IC704 IC705 IC801 IC901 IC902 IC1601 IC1602 IC1701 IC1801 IC1901 IC1951 IC2501 IC5301 IC6301 RMC801 Tuner
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