PASSPORT
®
PD-150 PLUS
(This is the model name for warranty claims)
6
PCB EXCHANGE POLICY
Parts marked with a single asterisk (
*) in the Part
Lists are not field replaceable. If a failure due to
one of these components is detected, please
contact the FMIC Customer Service Department to
order the complete PCB Assembly.
CIRCUIT DESCRIPTION
This section provides concise information about new
or unusual circuitry designs incorporated into this
amplifier model. The purpose is to aid the service
technician by providing insight into the design areas
most likely to become obstacles in troubleshooting.
Information is focused for its effective use while
maintaining the security of Fender® proprietary
information wherever possible.
The PD-150+ consists of the following modules:
1. The SMPS PCB module
2. The CD servo PCB module (common with PD-
250+)
3. LCD Key PCB module
4. The input PCB module
5. The mixer PCB module
6. The class-D amplifier PCB module
7. The DSP Reverb PCB module (common with
PD-250+)
The SMPS PCB Module
The SMPS PCB module accepts AC mains voltage
from 90Vr.m.s. ~ 264Vr.m.s. and provides the fol-
lowing output voltages to power the PD-150+ for
various functions:
1. +42.5V DC for the class-D amplifier PCB as-
sembly
2. +15/-15VDC for the input PCB assembly
3. +12VDC for the fan
4. +8VDC for the wireless microphone
5. +8VDC for the CD servo mechanism and PCB
assembly
6. +5VDC for the DSP Reverb PCB assembly
U1 (ML4824-1) is the PWM controller which
switches at a frequency of about 64 KHz. It also has
the function of power factor correction. U1 switches
Q1 on and off according to the load condition. Q1 in
turn drives transformer T1 which independently
supplies +42.5VDC power to the class-D amplifier
PCB assembly. The bridge rectifier BD2 rectifies the
AC input separately from LF2 and feeds the DC to
U2 (TOP249Y). U2 in turn switches and drives T4
directly. T4 then provides the rest of the power rails
for items 2 to 6 mentioned above. The fan will en-
gage when a temperature of about 40 degrees C is
reached by RT2, and will run at full speed when a
temperature above 50 degrees C is attained.
The CD Servo PCB Module
The CD Servo PCB module consists of the follow-
ing IC’s:
1. IC401 (TC94A58FA-006) - CD servo DSP
2. IC402 (TA2157F) - Digital Servo Head Amplifier
3. IC403 (MM1669AH) - Motor Driver
4. IC405 (TA7291S) - Bridge Driver
IC402 amplifies the laser pickup signal and feeds it
to IC401, which is a single-chip CD servo system.
IC 402 interfaces with the LCD Key PCB module via
three wires [DATA (pin 14), STB (pin 15) and ACK
(pin 16)] to receive control commands and return
data and status information to and from the LCD
Key PCB module. IC402 also directly controls
IC403, which in turn drives the forward and disc
motors via pins 17 and 18, and pins 11 and 12, re-
spectively. KIA7029 provides a synchronized reset
signal to both IC401 and the LCD Key PCB module.
The CD output signal is fed to the Mixer PCB mod-
ule for further processing.