Harman Kardon AVR-134 Service Manual page 24

Symptom
FM Failure.
AM Failure.
Stereo Effect Failure.
Stereo does not light up.
Tuner Sound Dead.
1. "L / R" Channel dead.
2. "LEFT" Channel dead.
3. "RIGHT" Channel dead.
HDMI Output Dead.
Cause and Remedy
A) FM Mute adjustment inferior.
B) FRONT­END inferior.
C) FM DET COIL inferior.
D) PLL & MPX IC check.
1. PLL & MPX I.C B+(5)V, B+(3.3)V check.
2. PLL control data check.(Data/CE/Clock)
E) TUNER B+voltage inferior.
F) μ­COM I.C & Resonator inferior.
1. μ­COM I.C B+(3.3)V check.
2. Micom control data check.
A) PLL & MPX IC check.
1. PLL & MPX I.C B+(5)V, B+(3.3)V check.
2. PLL control data check.(Data/CE/Clock)
B) TUNER B+ voltage inferior.
C) AM OSC COIL inferior.
D) μ­COM I.C & Resonator inferior.
1. μ­COM I.C B+(3.3)V check.
2. Micom control data check.
A) FM DET COIL inferior.
B) PLL & MPX IC check.
1. PLL & MPX I.C B+(5)V, B+(3.3)V check.
2. PLL control data check.(Data/CE/Clock)
C) μ­COM I.C & Resonator inferior.
1. μ­COM I.C B+(3.3)V check.
2. Micom control data check.
A) Connector's disconnection or disjunction.
Change or close insertion of the connector.
B) FM DET COIL inferior.
C) AM IFT COIL inferior.
D) PLL & MPX IC check.
1. SIGNAL IN / OUT terminal.
2. I.C driving voltage check.(+5V, +3V3)
A) I.C Regulator check.
1. DC voltage check. +(1.8)V
2. DC voltage check. +(3.3)V
3. DC voltage check. +(5)V
B) Micom control data check.
Selector control data check.
24
Ref No.
I.C NO. (1) / I.C Pin No. (8, 21)
I.C No. (101)
I.C Pin No. (20, 23, 24, 60, 61)
I.C NO. (1) / I.C Pin No. (8, 21)
I.C No. (101)
I.C Pin No. (20, 23, 24, 60, 61)
I.C No. (101)
I.C Pin No. (20, 23, 24, 60, 61)
I.C NO. (1) / I.C Pin No. (8, 21)
I.C03 (HDMI)
I.C04 (HDMI)
I.C112 (MAIN)
I.C01 Pin No. (14, 15)