Grundig GDR 6460 VCR, Service Manual

Page: 53 / 58

GRUNDIG Service
GDR 6460 VCR
2 - 37
b. AV1 E-E
No sound in AV1 E-E mode.
NO
Check Input AV1 JACK Is Audio signal at IC251 pin#6, 7?
Is Audio signal output at IC602 pin
#3, 13?
Is Audio signal output at IC251
pin#16,17?
Are CLK and DATA obtained at
IC251 pin#42,43?
NO
Is 5V obtained at IC251 pin#40?
Replace IC251.
YES
YES
Is 12V obtained at IC251 pin#34?
NO
YES Check POWER circuit.
YES
YES
Check Output JACK.
YES
c. AV2 E-E
No sound in AV2 E-E mode.
NO
Check Input AV2 JACK Is Audio signal at IC251 pin#8, 9?
Is Audio signal output at IC602
pin #3, 13?
Is Audio signal output at IC251
pin#19, 20?
Are CLK and DATA obtained at
IC251 pin#42,43?
NO
Is 5V obtained at IC251 pin#40?
Replace IC251.
YES
YES
Is 12V obtained at IC251 pin#34?
NO
YES
Check POWER circuit.
YES
YES
Check Output JACK.
YES
Check IC602.
NO
Check IC602.
NO
e. FRONT E-E
No sound in FRONT E-E
mode.
NO
Check Input FRONT JACK
Is Audio signal at IC251
pin#10,11?
Is Audio signal output at IC602 pin
#3, 13?
Is Audio signal output at IC251
pin#19, 20?
Are CLK and DATA obtained at
IC251 pin#42,43?
NO
Is 5V obtained at IC251 pin#40?
Replace IC251.
YES
YES
Is 12V obtained at IC251 pin#34?
NO
YES
Check POWER circuit.
YES
Check Output JACK.
YES
Check IC602.
NO
d. DVD E-E
No sound in DVD
E-E mode.
Is there DVD Audio at IC102
pin#7,8?
Is 12V obtained at ICD02 pin#8?
Is Audio(DVD) signal at IC602
pin#5,14?
YES
YES
Check ICD02.
NO
Check IC102, MPEG board
NO
Check POWER circuit.
NO
Is DVD Audio signaloutput at
ICD02 pin#1,7?
Check ICD02.
NO
YES
Is Audio signal output at IC602 pin
#3,13?
YES
Check Output JACK.
YES
Check IC602.
NO