Test Mode - Kenwood KRC-705 Service Manual

KRC-705/759R/RY/785/805/859C
ICY/RIRY WWY/885W/PS955
CIRCUIT DESCRIPTION
Terminal descriptions
Pin Name
Name Function
Description
P27/SCKO PLL_CLK
PLL clock pin
P80/A0 PACK_IN
Pack in detection pin
Pack in : Hi
P81/A1 F/R C mechanism FWD/REV detection pin
FWD : Hi, REV: Lo
—
P82/A2 WIDE Kal forced wide output pin
Active : Hi
P83/A3 NARROW K2l forced narrow output pin
Active : Hi
P84/A4 KEY REQ
Key input request from LCD driver Key : Hi
P85/A5 IL_CE1
LCD driver CE pin
P86/A6 L_INH
LCD driver reset pin
Reset : Lo
P87/A7 L_CE2
LCD driver CE pin
P40/ADO QUAL
RDS reception mode
+
P41/AD1 R_DATA
RDS data input pin
P42/AD2 NC
Output open
P43/AD3 NC
Output open
P44/AD4 SRM_DET
SRM mechanism detection pin
+
Mechanism : L , No mechanism : Hi
P45/AD5
P46/AD6
P47/AD7
SRM_SW2
FM_SD
NC
SRM eject position detection pin
FM SD input pin
Output open
AFC
LO/DX
MUSIC
P50/A8
P51/A9
P52/A10
Noise detection constant selection pin
Local output pin
Startup : Eject position
Station : Hi, No station : Lo
Reception : Hi, Search : Lo
Local : Hi, Normal : Lo
Tape selection detection pin
P53/A11 MSC
Blank detection constant selection pin
Selection : Lo : No selection : Hi
Play mode : Hi, FF/REW mode : Lo
P54/A12 MTL
Metal output pin
Active : Hi
PSS/A13 EQ MUTE EQ mute output pin
Active : Hi
PS6/A14 DOLBY
Dolby output pin
Active : Hi
PS7/A15 B/C Dolby B/C selection pin
B: Lo, C: Hi
Vss
TEST MODE
1. To enter test mode
GND pin
While holding the "FM" key and preset "6" key, reset the unit.
All indication segments are ON at the beginning of test mode.
2. To release test mode
Simply reset the unit.
(NOTE) The test mode is not canceled by ACC OFF, power OFF, momentary power down or
the panel detaching.
3. FM signal meter voltage adjustment
1) Enter test mode .
2) Receive 98.1MHz with the SG and set the ANT input evel to 35dBfE. The modulation
should be off during this.