JVC HR-XV2EK Service Manual page 20

3. Y/C CIRCUIT
(B) Hi-Fi Playback
PB mode
YES
No Sound.
YES
Check the Vcc of IC801
(Pins34, 40)
YES
Check the Hi-Fi Selection switch.
(IC801 Pin41) and the Tape quality.
YES
Is the RF Envelope at
IC801 Pin44 over 2Vp-p?
YES
Check IC801 Pin42(Data),
Pin43(Clock)
YES
Do Audio Signals appear at
IC801 Pin16(L-CH), 17(R-CH)?
YES
Do Audio Signals appear at
IC803 Pin16(L-CH), 11(R-CH)?
YES
Do Audio Signals appear at
IC803 Pins3, 5?
YES
Do Audio Signals appear at
JK902?
NO
Check Power 5.2V, 12VT.
NO
Check IC501 Pin106
(A.H/SW)
NO
Check the parts of µ-COM
NO
(IC501 Pins59, 60)
NO
Check the Connection at
P3D01 Pins7, 9.
NO
Check the A.IN line of
IC803(C837, C838)
NO
Check the Vcc of IC803
Pin13.
Replace IC803.
NO
Check the Jack(JK902)
3-16
NO
YES
Check Power.