Dell GCR-8481B Service Manual page 13

G-1
Is the connection
between JK801 (or Audio
Line out connector) and
Line (or Jack) normal?
YES
Check your sound card,
Audio Cable, Speaker,
Volume and Headphone
Jack.
CH1
PIN6 of
IC601
CH2
PIN10 of
IC601
30
NO
Check the JK801 and
Audio line pattern.
Fig. G-1. PWM Signal
CH2
PIN3 of
IC601
CH2
PIN12 of
IC601
Fig. G-2. Audio Signal